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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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*/ |
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package extra166y; |
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import jsr166y.*; |
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import static extra166y.Ops.*; |
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import java.util.*; |
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/** |
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* A collection of static factory methods providing commonly useful |
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* implementations of operations. |
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*/ |
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public class CommonOps { |
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private CommonOps() {} // disable construction |
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/** |
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* Returns a Comparator for Comparable objects |
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*/ |
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public static <T extends Comparable<? super T>> Comparator<T> |
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naturalComparator(Class<T> type) { |
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return new Comparator<T>() { |
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public int compare(T a, T b) { return a.compareTo(b); } |
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}; |
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} |
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/** |
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* Returns a reducer returning the maximum of two Comparable |
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* elements, treating null as less than any non-null element. |
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*/ |
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public static <T extends Comparable<? super T>> Reducer<T> |
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naturalMaxReducer(Class<T> type) { |
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return new Reducer<T>() { |
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public T op(T a, T b) { |
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return (a != null && |
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(b == null || a.compareTo(b) >= 0))? a : b; |
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} |
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}; |
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} |
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/** |
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* Returns a reducer returning the minimum of two Comparable |
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* elements, treating null as greater than any non-null element. |
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*/ |
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public static <T extends Comparable<? super T>> Reducer<T> |
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naturalMinReducer(Class<T> type) { |
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return new Reducer<T>() { |
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public T op(T a, T b) { |
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return (a != null && |
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(b == null || a.compareTo(b) <= 0))? a : b; |
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} |
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}; |
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} |
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/** |
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* Returns a reducer returning the maximum of two elements, using |
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* the given comparator, and treating null as less than any |
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* non-null element. |
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*/ |
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public static <T> Reducer<T> maxReducer |
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(final Comparator<? super T> comparator) { |
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return new Reducer<T>() { |
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public T op(T a, T b) { |
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return (a != null && |
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(b == null || comparator.compare(a, b) >= 0))? a : b; |
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} |
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}; |
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} |
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/** |
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* Returns a reducer returning the minimum of two elements, using |
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* the given comparator, and treating null as greater than any |
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* non-null element. |
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*/ |
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public static <T> Reducer<T> minReducer |
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(final Comparator<? super T> comparator) { |
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return new Reducer<T>() { |
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public T op(T a, T b) { |
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return (a != null && |
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(b == null || comparator.compare(a, b) <= 0))? a : b; |
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} |
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}; |
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} |
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/** |
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* Returns a Comparator that casts its arguments as Comparable on |
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* each comparison, throwing ClassCastException on failure. |
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*/ |
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public static Comparator<Object> castedComparator() { |
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return (Comparator<Object>)(RawComparator.cmp); |
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} |
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static final class RawComparator implements Comparator { |
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static final RawComparator cmp = new RawComparator(); |
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public int compare(Object a, Object b) { |
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return ((Comparable)a).compareTo((Comparable)b); |
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} |
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} |
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/** |
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* Returns a reducer returning maximum of two values, or |
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* <tt>null</tt> if both arguments are null, and that casts |
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* its arguments as Comparable on each comparison, throwing |
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* ClassCastException on failure. |
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*/ |
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public static Reducer<Object> castedMaxReducer() { |
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return (Reducer<Object>)RawMaxReducer.max; |
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} |
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static final class RawMaxReducer implements Reducer { |
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static final RawMaxReducer max = new RawMaxReducer(); |
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public Object op(Object a, Object b) { |
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return (a != null && |
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(b == null || |
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((Comparable)a).compareTo((Comparable)b) >= 0))? a : b; |
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} |
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} |
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/** |
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* Returns a reducer returning minimum of two values, or |
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* <tt>null</tt> if both arguments are null, and that casts |
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* its arguments as Comparable on each comparison, throwing |
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* ClassCastException on failure. |
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*/ |
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public static Reducer<Object> castedMinReducer() { |
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return (Reducer<Object>)RawMinReducer.min; |
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} |
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static final class RawMinReducer implements Reducer { |
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static final RawMinReducer min = new RawMinReducer(); |
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public Object op(Object a, Object b) { |
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return (a != null && |
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(b == null || |
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((Comparable)a).compareTo((Comparable)b) <= 0))? a : b; |
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} |
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} |
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/** |
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* Returns a comparator for doubles relying on natural ordering |
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*/ |
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public static DoubleComparator naturalDoubleComparator() { |
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return NaturalDoubleComparator.comparator; |
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} |
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static final class NaturalDoubleComparator |
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implements DoubleComparator { |
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static final NaturalDoubleComparator comparator = new |
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NaturalDoubleComparator(); |
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public int compare(double a, double b) { |
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return Double.compare(a, b); |
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} |
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} |
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/** |
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* Returns a reducer returning the maximum of two double elements, |
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* using natural comparator |
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*/ |
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public static DoubleReducer naturalDoubleMaxReducer() { |
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return NaturalDoubleMaxReducer.max; |
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} |
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static final class NaturalDoubleMaxReducer |
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implements DoubleReducer { |
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public static final NaturalDoubleMaxReducer max = |
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new NaturalDoubleMaxReducer(); |
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public double op(double a, double b) { return Math.max(a, b); } |
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} |
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/** |
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* Returns a reducer returning the minimum of two double elements, |
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* using natural comparator |
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*/ |
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public static DoubleReducer naturalDoubleMinReducer() { |
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return NaturalDoubleMinReducer.min; |
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} |
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static final class NaturalDoubleMinReducer |
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implements DoubleReducer { |
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public static final NaturalDoubleMinReducer min = |
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new NaturalDoubleMinReducer(); |
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public double op(double a, double b) { return Math.min(a, b); } |
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} |
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/** |
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* Returns a reducer returning the maximum of two double elements, |
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* using the given comparator |
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*/ |
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public static DoubleReducer doubleMaxReducer |
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(final DoubleComparator comparator) { |
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return new DoubleReducer() { |
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public double op(double a, double b) { |
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return (comparator.compare(a, b) >= 0)? a : b; |
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} |
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}; |
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} |
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/** |
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* Returns a reducer returning the minimum of two double elements, |
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* using the given comparator |
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*/ |
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public static DoubleReducer doubleMinReducer |
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(final DoubleComparator comparator) { |
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return new DoubleReducer() { |
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public double op(double a, double b) { |
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return (comparator.compare(a, b) <= 0)? a : b; |
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} |
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}; |
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} |
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/** |
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* Returns a comparator for longs relying on natural ordering |
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*/ |
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public static LongComparator naturalLongComparator() { |
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return NaturalLongComparator.comparator; |
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} |
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static final class NaturalLongComparator |
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implements LongComparator { |
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static final NaturalLongComparator comparator = new |
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NaturalLongComparator(); |
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public int compare(long a, long b) { |
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return a < b? -1 : ((a > b)? 1 : 0); |
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} |
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} |
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/** |
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* Returns a reducer returning the maximum of two long elements, |
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* using natural comparator |
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*/ |
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public static LongReducer naturalLongMaxReducer() { |
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return NaturalLongMaxReducer.max; |
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} |
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static final class NaturalLongMaxReducer |
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implements LongReducer { |
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public static final NaturalLongMaxReducer max = |
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new NaturalLongMaxReducer(); |
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public long op(long a, long b) { return a >= b? a : b; } |
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} |
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/** |
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* A reducer returning the minimum of two long elements, |
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* using natural comparator |
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*/ |
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public static LongReducer naturalLongMinReducer() { |
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return NaturalLongMinReducer.min; |
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} |
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static final class NaturalLongMinReducer |
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implements LongReducer { |
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public static final NaturalLongMinReducer min = |
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new NaturalLongMinReducer(); |
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public long op(long a, long b) { return a <= b? a : b; } |
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} |
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/** |
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* Returns a reducer returning the maximum of two long elements, |
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* using the given comparator |
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*/ |
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public static LongReducer longMaxReducer |
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(final LongComparator comparator) { |
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return new LongReducer() { |
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public long op(long a, long b) { |
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return (comparator.compare(a, b) >= 0)? a : b; |
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} |
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}; |
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} |
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/** |
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* Returns a reducer returning the minimum of two long elements, |
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* using the given comparator |
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*/ |
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public static LongReducer longMinReducer |
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(final LongComparator comparator) { |
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return new LongReducer() { |
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public long op(long a, long b) { |
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return (comparator.compare(a, b) <= 0)? a : b; |
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} |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T,U,V> Op<T,V> compoundOp |
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(final Op<? super T, ? extends U> first, |
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final Op<? super U, ? extends V> second) { |
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return new Op<T,V>() { |
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public final V op(T t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T,V> Op<T,V> compoundOp |
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(final ObjectToDouble<? super T> first, |
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final DoubleToObject<? extends V> second) { |
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return new Op<T,V>() { |
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public final V op(T t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T,V> Op<T,V> compoundOp |
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(final ObjectToLong<? super T> first, |
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final LongToObject<? extends V> second) { |
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return new Op<T,V>() { |
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public final V op(T t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T,V> DoubleToObject<V> compoundOp |
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(final DoubleToObject<? extends T> first, |
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final Op<? super T,? extends V> second) { |
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return new DoubleToObject<V>() { |
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public final V op(double t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T,V> LongToObject<V> compoundOp |
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(final LongToObject<? extends T> first, |
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final Op<? super T,? extends V> second) { |
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return new LongToObject<V>() { |
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public final V op(long t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T,U> ObjectToDouble<T> compoundOp |
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(final Op<? super T, ? extends U> first, |
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final ObjectToDouble<? super U> second) { |
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return new ObjectToDouble<T>() { |
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public final double op(T t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T,U> ObjectToLong<T> compoundOp |
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(final Op<? super T, ? extends U> first, |
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final ObjectToLong<? super U> second) { |
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return new ObjectToLong<T>() { |
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public final long op(T t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T> ObjectToDouble<T> compoundOp |
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(final ObjectToDouble<? super T> first, |
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final DoubleOp second) { |
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return new ObjectToDouble<T>() { |
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public final double op(T t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T> ObjectToLong<T> compoundOp |
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(final ObjectToDouble<? super T> first, |
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final DoubleToLong second) { |
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return new ObjectToLong<T>() { |
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public final long op(T t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T> ObjectToLong<T> compoundOp |
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(final ObjectToLong<? super T> first, |
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final LongOp second) { |
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return new ObjectToLong<T>() { |
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public final long op(T t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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* Returns a composite mapper that applies a second mapper to the results |
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* of applying the first one |
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*/ |
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public static <T> ObjectToDouble<T> compoundOp |
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(final ObjectToLong<? super T> first, |
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final LongToDouble second) { |
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return new ObjectToDouble<T>() { |
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public final double op(T t) { return second.op(first.op(t)); } |
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}; |
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} |
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/** |
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|
|
* Returns a composite mapper that applies a second mapper to the results |
412 |
|
|
* of applying the first one |
413 |
|
|
*/ |
414 |
|
|
public static DoubleOp compoundOp |
415 |
|
|
(final DoubleOp first, |
416 |
|
|
final DoubleOp second) { |
417 |
|
|
return new DoubleOp() { |
418 |
|
|
public final double op(double t) { return second.op(first.op(t)); } |
419 |
|
|
}; |
420 |
|
|
} |
421 |
|
|
|
422 |
|
|
/** |
423 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
424 |
|
|
* of applying the first one |
425 |
|
|
*/ |
426 |
|
|
public static DoubleToLong compoundOp |
427 |
|
|
(final DoubleOp first, |
428 |
|
|
final DoubleToLong second) { |
429 |
|
|
return new DoubleToLong() { |
430 |
|
|
public final long op(double t) { return second.op(first.op(t)); } |
431 |
|
|
}; |
432 |
|
|
} |
433 |
|
|
|
434 |
|
|
/** |
435 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
436 |
|
|
* of applying the first one |
437 |
|
|
*/ |
438 |
|
|
public static DoubleToLong compoundOp |
439 |
|
|
(final DoubleToLong first, |
440 |
|
|
final LongOp second) { |
441 |
|
|
return new DoubleToLong() { |
442 |
|
|
public final long op(double t) { return second.op(first.op(t)); } |
443 |
|
|
}; |
444 |
|
|
} |
445 |
|
|
|
446 |
|
|
/** |
447 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
448 |
|
|
* of applying the first one |
449 |
|
|
*/ |
450 |
|
|
public static <T> DoubleToObject<T> compoundOp |
451 |
|
|
(final DoubleToLong first, |
452 |
|
|
final LongToObject<? extends T> second) { |
453 |
|
|
return new DoubleToObject<T>() { |
454 |
|
|
public final T op(double t) { return second.op(first.op(t)); } |
455 |
|
|
}; |
456 |
|
|
} |
457 |
|
|
|
458 |
|
|
/** |
459 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
460 |
|
|
* of applying the first one |
461 |
|
|
*/ |
462 |
|
|
public static <T> LongToObject<T> compoundOp |
463 |
|
|
(final LongToDouble first, |
464 |
|
|
final DoubleToObject<? extends T> second) { |
465 |
|
|
return new LongToObject<T>() { |
466 |
|
|
public final T op(long t) { return second.op(first.op(t)); } |
467 |
|
|
}; |
468 |
|
|
} |
469 |
|
|
|
470 |
|
|
/** |
471 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
472 |
|
|
* of applying the first one |
473 |
|
|
*/ |
474 |
|
|
public static LongToDouble compoundOp |
475 |
|
|
(final LongOp first, |
476 |
|
|
final LongToDouble second) { |
477 |
|
|
return new LongToDouble() { |
478 |
|
|
public final double op(long t) { return second.op(first.op(t)); } |
479 |
|
|
}; |
480 |
|
|
} |
481 |
|
|
|
482 |
|
|
/** |
483 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
484 |
|
|
* of applying the first one |
485 |
|
|
*/ |
486 |
|
|
public static LongToDouble compoundOp |
487 |
|
|
(final LongToDouble first, |
488 |
|
|
final DoubleOp second) { |
489 |
|
|
return new LongToDouble() { |
490 |
|
|
public final double op(long t) { return second.op(first.op(t)); } |
491 |
|
|
}; |
492 |
|
|
} |
493 |
|
|
|
494 |
|
|
/** |
495 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
496 |
|
|
* of applying the first one |
497 |
|
|
*/ |
498 |
|
|
public static <T> DoubleToObject<T> compoundOp |
499 |
|
|
(final DoubleOp first, |
500 |
|
|
final DoubleToObject<? extends T> second) { |
501 |
|
|
return new DoubleToObject<T>() { |
502 |
|
|
public final T op(double t) { return second.op(first.op(t)); } |
503 |
|
|
}; |
504 |
|
|
} |
505 |
|
|
|
506 |
|
|
/** |
507 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
508 |
|
|
* of applying the first one |
509 |
|
|
*/ |
510 |
|
|
public static <T> LongToObject<T> compoundOp |
511 |
|
|
(final LongOp first, |
512 |
|
|
final LongToObject<? extends T> second) { |
513 |
|
|
return new LongToObject<T>() { |
514 |
|
|
public final T op(long t) { return second.op(first.op(t)); } |
515 |
|
|
}; |
516 |
|
|
} |
517 |
|
|
|
518 |
|
|
/** |
519 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
520 |
|
|
* of applying the first one |
521 |
|
|
*/ |
522 |
|
|
public static <T> DoubleOp compoundOp |
523 |
|
|
(final DoubleToObject<? extends T> first, |
524 |
|
|
final ObjectToDouble<? super T> second) { |
525 |
|
|
return new DoubleOp() { |
526 |
|
|
public final double op(double t) { return second.op(first.op(t)); } |
527 |
|
|
}; |
528 |
|
|
} |
529 |
|
|
|
530 |
|
|
/** |
531 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
532 |
|
|
* of applying the first one |
533 |
|
|
*/ |
534 |
|
|
public static <T> LongToDouble compoundOp |
535 |
|
|
(final LongToObject<? extends T> first, |
536 |
|
|
final ObjectToDouble<? super T> second) { |
537 |
|
|
return new LongToDouble() { |
538 |
|
|
public final double op(long t) { return second.op(first.op(t)); } |
539 |
|
|
}; |
540 |
|
|
} |
541 |
|
|
|
542 |
|
|
/** |
543 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
544 |
|
|
* of applying the first one |
545 |
|
|
*/ |
546 |
|
|
public static <T> DoubleToLong compoundOp |
547 |
|
|
(final DoubleToObject<? extends T> first, |
548 |
|
|
final ObjectToLong<? super T> second) { |
549 |
|
|
return new DoubleToLong() { |
550 |
|
|
public final long op(double t) { return second.op(first.op(t)); } |
551 |
|
|
}; |
552 |
|
|
} |
553 |
|
|
|
554 |
|
|
/** |
555 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
556 |
|
|
* of applying the first one |
557 |
|
|
*/ |
558 |
|
|
public static <T> LongOp compoundOp |
559 |
|
|
(final LongToObject<? extends T> first, |
560 |
|
|
final ObjectToLong<? super T> second) { |
561 |
|
|
return new LongOp() { |
562 |
|
|
public final long op(long t) { return second.op(first.op(t)); } |
563 |
|
|
}; |
564 |
|
|
} |
565 |
|
|
|
566 |
|
|
/** |
567 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
568 |
|
|
* of applying the first one |
569 |
|
|
*/ |
570 |
|
|
public static LongOp compoundOp |
571 |
|
|
(final LongOp first, |
572 |
|
|
final LongOp second) { |
573 |
|
|
return new LongOp() { |
574 |
|
|
public final long op(long t) { return second.op(first.op(t)); } |
575 |
|
|
}; |
576 |
|
|
} |
577 |
|
|
|
578 |
|
|
/** |
579 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
580 |
|
|
* of applying the first one |
581 |
|
|
*/ |
582 |
|
|
public static DoubleOp compoundOp |
583 |
|
|
(final DoubleToLong first, |
584 |
|
|
final LongToDouble second) { |
585 |
|
|
return new DoubleOp() { |
586 |
|
|
public final double op(double t) { return second.op(first.op(t)); } |
587 |
|
|
}; |
588 |
|
|
} |
589 |
|
|
|
590 |
|
|
/** |
591 |
|
|
* Returns a composite mapper that applies a second mapper to the results |
592 |
|
|
* of applying the first one |
593 |
|
|
*/ |
594 |
|
|
public static LongOp compoundOp |
595 |
|
|
(final LongToDouble first, |
596 |
|
|
final DoubleToLong second) { |
597 |
|
|
return new LongOp() { |
598 |
|
|
public final long op(long t) { return second.op(first.op(t)); } |
599 |
|
|
}; |
600 |
|
|
} |
601 |
|
|
|
602 |
|
|
/** |
603 |
|
|
* Returns a predicate evaluating to the negation of its contained predicate |
604 |
|
|
*/ |
605 |
|
|
public static <T> Predicate<T> notPredicate |
606 |
|
|
(final Predicate<T> pred) { |
607 |
|
|
return new Predicate<T>() { |
608 |
|
|
public final boolean op(T x) { return !pred.op(x); } |
609 |
|
|
}; |
610 |
|
|
} |
611 |
|
|
|
612 |
|
|
/** |
613 |
|
|
* Returns a predicate evaluating to the negation of its contained predicate |
614 |
|
|
*/ |
615 |
|
|
public static DoublePredicate notPredicate |
616 |
|
|
(final DoublePredicate pred) { |
617 |
|
|
return new DoublePredicate() { |
618 |
|
|
public final boolean op(double x) { return !pred.op(x); } |
619 |
|
|
}; |
620 |
|
|
} |
621 |
|
|
|
622 |
|
|
/** |
623 |
|
|
* Returns a predicate evaluating to the negation of its contained predicate |
624 |
|
|
*/ |
625 |
|
|
public static LongPredicate notPredicate |
626 |
|
|
(final LongPredicate pred) { |
627 |
|
|
return new LongPredicate() { |
628 |
|
|
public final boolean op(long x) { return !pred.op(x); } |
629 |
|
|
}; |
630 |
|
|
} |
631 |
|
|
|
632 |
|
|
/** |
633 |
|
|
* Returns a predicate evaluating to the conjunction of its contained predicates |
634 |
|
|
*/ |
635 |
|
|
public static <S, T extends S> Predicate<T> andPredicate |
636 |
|
|
(final Predicate<S> first, |
637 |
|
|
final Predicate<? super T> second) { |
638 |
|
|
return new Predicate<T>() { |
639 |
|
|
public final boolean op(T x) { |
640 |
|
|
return first.op(x) && second.op(x); |
641 |
|
|
} |
642 |
|
|
}; |
643 |
|
|
} |
644 |
|
|
|
645 |
|
|
/** |
646 |
|
|
* Returns a predicate evaluating to the disjunction of its contained predicates |
647 |
|
|
*/ |
648 |
|
|
public static <S, T extends S> Predicate<T> orPredicate |
649 |
|
|
(final Predicate<S> first, |
650 |
|
|
final Predicate<? super T> second) { |
651 |
|
|
return new Predicate<T>() { |
652 |
|
|
public final boolean op(T x) { |
653 |
|
|
return first.op(x) || second.op(x); |
654 |
|
|
} |
655 |
|
|
}; |
656 |
|
|
} |
657 |
|
|
|
658 |
|
|
/** |
659 |
|
|
* Returns a predicate evaluating to the conjunction of its contained predicates |
660 |
|
|
*/ |
661 |
|
|
public static DoublePredicate andPredicate |
662 |
|
|
(final DoublePredicate first, |
663 |
|
|
final DoublePredicate second) { |
664 |
|
|
return new DoublePredicate() { |
665 |
|
|
public final boolean op(double x) { |
666 |
|
|
return first.op(x) && second.op(x); |
667 |
|
|
} |
668 |
|
|
}; |
669 |
|
|
} |
670 |
|
|
|
671 |
|
|
/** |
672 |
|
|
* Returns a predicate evaluating to the disjunction of its contained predicates |
673 |
|
|
*/ |
674 |
|
|
public static DoublePredicate orPredicate |
675 |
|
|
(final DoublePredicate first, |
676 |
|
|
final DoublePredicate second) { |
677 |
|
|
return new DoublePredicate() { |
678 |
|
|
public final boolean op(double x) { |
679 |
|
|
return first.op(x) || second.op(x); |
680 |
|
|
} |
681 |
|
|
}; |
682 |
|
|
} |
683 |
|
|
|
684 |
|
|
|
685 |
|
|
/** |
686 |
|
|
* Returns a predicate evaluating to the conjunction of its contained predicates |
687 |
|
|
*/ |
688 |
|
|
public static LongPredicate andPredicate |
689 |
|
|
(final LongPredicate first, |
690 |
|
|
final LongPredicate second) { |
691 |
|
|
return new LongPredicate() { |
692 |
|
|
public final boolean op(long x) { |
693 |
|
|
return first.op(x) && second.op(x); |
694 |
|
|
} |
695 |
|
|
}; |
696 |
|
|
} |
697 |
|
|
|
698 |
|
|
/** |
699 |
|
|
* Returns a predicate evaluating to the disjunction of its contained predicates |
700 |
|
|
*/ |
701 |
|
|
public static LongPredicate orPredicate |
702 |
|
|
(final LongPredicate first, |
703 |
|
|
final LongPredicate second) { |
704 |
|
|
return new LongPredicate() { |
705 |
|
|
public final boolean op(long x) { |
706 |
|
|
return first.op(x) || second.op(x); |
707 |
|
|
} |
708 |
|
|
}; |
709 |
|
|
} |
710 |
|
|
|
711 |
|
|
/** |
712 |
|
|
* Returns a predicate evaluating to true if its argument is non-null |
713 |
|
|
*/ |
714 |
|
|
public static Predicate<Object> isNonNullPredicate() { |
715 |
|
|
return IsNonNullPredicate.predicate; |
716 |
|
|
} |
717 |
|
|
static final class IsNonNullPredicate implements Predicate<Object> { |
718 |
|
|
static final IsNonNullPredicate predicate = |
719 |
|
|
new IsNonNullPredicate(); |
720 |
|
|
public final boolean op(Object x) { |
721 |
|
|
return x != null; |
722 |
|
|
} |
723 |
|
|
} |
724 |
|
|
|
725 |
|
|
/** |
726 |
|
|
* Returns a predicate evaluating to true if its argument is null |
727 |
|
|
*/ |
728 |
|
|
public static Predicate<Object> isNullPredicate() { |
729 |
|
|
return IsNullPredicate.predicate; |
730 |
|
|
} |
731 |
|
|
static final class IsNullPredicate implements Predicate<Object> { |
732 |
|
|
static final IsNullPredicate predicate = |
733 |
|
|
new IsNullPredicate(); |
734 |
|
|
public final boolean op(Object x) { |
735 |
|
|
return x != null; |
736 |
|
|
} |
737 |
|
|
} |
738 |
|
|
|
739 |
|
|
/** |
740 |
|
|
* Returns a predicate evaluating to true if its argument is an instance |
741 |
|
|
* of (see {@link Class#isInstance} the given type (class). |
742 |
|
|
*/ |
743 |
|
|
public static Predicate<Object> instanceofPredicate(final Class type) { |
744 |
|
|
return new Predicate<Object>() { |
745 |
|
|
public final boolean op(Object x) { |
746 |
|
|
return type.isInstance(x); |
747 |
|
|
} |
748 |
|
|
}; |
749 |
|
|
} |
750 |
|
|
|
751 |
|
|
/** |
752 |
|
|
* Returns a predicate evaluating to true if its argument is assignable |
753 |
|
|
* from (see {@link Class#isAssignableFrom} the given type (class). |
754 |
|
|
*/ |
755 |
|
|
public static Predicate<Object> isAssignablePredicate(final Class type) { |
756 |
|
|
return new Predicate<Object>() { |
757 |
|
|
public final boolean op(Object x) { |
758 |
|
|
return type.isAssignableFrom(x.getClass()); |
759 |
|
|
} |
760 |
|
|
}; |
761 |
|
|
} |
762 |
|
|
|
763 |
|
|
/** |
764 |
|
|
* Returns a reducer that adds two double elements |
765 |
|
|
*/ |
766 |
|
|
public static DoubleReducer doubleAdder() { return DoubleAdder.adder; } |
767 |
|
|
static final class DoubleAdder implements DoubleReducer { |
768 |
|
|
static final DoubleAdder adder = new DoubleAdder(); |
769 |
|
|
public double op(double a, double b) { return a + b; } |
770 |
|
|
} |
771 |
|
|
|
772 |
|
|
/** |
773 |
|
|
* Returns a reducer that adds two long elements |
774 |
|
|
*/ |
775 |
|
|
public static LongReducer longAdder() { return LongAdder.adder; } |
776 |
|
|
static final class LongAdder implements LongReducer { |
777 |
|
|
static final LongAdder adder = new LongAdder(); |
778 |
|
|
public long op(long a, long b) { return a + b; } |
779 |
|
|
} |
780 |
|
|
|
781 |
|
|
/** |
782 |
|
|
* Returns a reducer that adds two int elements |
783 |
|
|
*/ |
784 |
|
|
public static IntReducer intAdder() { return IntAdder.adder; } |
785 |
|
|
static final class IntAdder implements IntReducer { |
786 |
|
|
static final IntAdder adder = new IntAdder(); |
787 |
|
|
public int op(int a, int b) { return a + b; } |
788 |
|
|
} |
789 |
|
|
|
790 |
|
|
/** |
791 |
|
|
* Returns a generator producing uniform random values between |
792 |
|
|
* zero and one, with the same properties as {@link |
793 |
dl |
1.2 |
* java.util.Random#nextDouble} |
794 |
dl |
1.1 |
*/ |
795 |
|
|
public static DoubleGenerator doubleRandom() { |
796 |
|
|
return DoubleRandomGenerator.generator; |
797 |
|
|
} |
798 |
|
|
static final class DoubleRandomGenerator implements DoubleGenerator { |
799 |
|
|
static final DoubleRandomGenerator generator = |
800 |
|
|
new DoubleRandomGenerator(); |
801 |
|
|
public double op() { |
802 |
dl |
1.2 |
return ThreadLocalRandom.current().nextDouble(); |
803 |
dl |
1.1 |
} |
804 |
|
|
} |
805 |
|
|
|
806 |
|
|
/** |
807 |
|
|
* Returns a generator producing uniform random values between |
808 |
|
|
* zero and the given bound, with the same properties as {@link |
809 |
dl |
1.2 |
* java.util.Random#nextDouble}. |
810 |
dl |
1.1 |
* @param bound the upper bound (exclusive) of opd values |
811 |
|
|
*/ |
812 |
|
|
public static DoubleGenerator doubleRandom(double bound) { |
813 |
|
|
return new DoubleBoundedRandomGenerator(bound); |
814 |
|
|
} |
815 |
|
|
static final class DoubleBoundedRandomGenerator implements DoubleGenerator { |
816 |
|
|
final double bound; |
817 |
|
|
DoubleBoundedRandomGenerator(double bound) { this.bound = bound; } |
818 |
|
|
public double op() { |
819 |
dl |
1.2 |
return ThreadLocalRandom.current().nextDouble() * bound; |
820 |
dl |
1.1 |
} |
821 |
|
|
} |
822 |
|
|
|
823 |
|
|
/** |
824 |
|
|
* Returns a generator producing uniform random values between the |
825 |
dl |
1.2 |
* given least value (inclusive) and bound (exclusive) |
826 |
dl |
1.1 |
* @param least the least value returned |
827 |
|
|
* @param bound the upper bound (exclusive) of opd values |
828 |
|
|
*/ |
829 |
|
|
public static DoubleGenerator doubleRandom(double least, double bound) { |
830 |
|
|
return new DoubleIntervalRandomGenerator(least, bound); |
831 |
|
|
} |
832 |
|
|
static final class DoubleIntervalRandomGenerator implements DoubleGenerator { |
833 |
|
|
final double least; |
834 |
|
|
final double range; |
835 |
|
|
DoubleIntervalRandomGenerator(double least, double bound) { |
836 |
|
|
this.least = least; this.range = bound - least; |
837 |
|
|
} |
838 |
|
|
public double op() { |
839 |
dl |
1.2 |
return ThreadLocalRandom.current().nextDouble() * range + least; |
840 |
dl |
1.1 |
} |
841 |
|
|
} |
842 |
|
|
|
843 |
|
|
/** |
844 |
|
|
* Returns a generator producing uniform random values with the |
845 |
dl |
1.2 |
* same properties as {@link java.util.Random#nextLong} |
846 |
dl |
1.1 |
*/ |
847 |
|
|
public static LongGenerator longRandom() { |
848 |
|
|
return LongRandomGenerator.generator; |
849 |
|
|
} |
850 |
|
|
static final class LongRandomGenerator implements LongGenerator { |
851 |
|
|
static final LongRandomGenerator generator = |
852 |
|
|
new LongRandomGenerator(); |
853 |
|
|
public long op() { |
854 |
dl |
1.2 |
return ThreadLocalRandom.current().nextLong(); |
855 |
dl |
1.1 |
} |
856 |
|
|
} |
857 |
|
|
|
858 |
|
|
/** |
859 |
|
|
* Returns a generator producing uniform random values with the |
860 |
dl |
1.2 |
* same properties as {@link java.util.Random#nextInt(int)} |
861 |
dl |
1.1 |
* @param bound the upper bound (exclusive) of opd values |
862 |
|
|
*/ |
863 |
|
|
public static LongGenerator longRandom(long bound) { |
864 |
|
|
if (bound <= 0) |
865 |
|
|
throw new IllegalArgumentException(); |
866 |
|
|
return new LongBoundedRandomGenerator(bound); |
867 |
|
|
} |
868 |
|
|
static final class LongBoundedRandomGenerator implements LongGenerator { |
869 |
|
|
final long bound; |
870 |
|
|
LongBoundedRandomGenerator(long bound) { this.bound = bound; } |
871 |
|
|
public long op() { |
872 |
dl |
1.2 |
return ThreadLocalRandom.current().nextLong(bound); |
873 |
dl |
1.1 |
} |
874 |
|
|
} |
875 |
|
|
|
876 |
|
|
/** |
877 |
|
|
* Returns a generator producing uniform random values between the |
878 |
dl |
1.2 |
* given least value (inclusive) and bound (exclusive). |
879 |
dl |
1.1 |
* @param least the least value returned |
880 |
|
|
* @param bound the upper bound (exclusive) of opd values |
881 |
|
|
*/ |
882 |
|
|
public static LongGenerator longRandom(long least, long bound) { |
883 |
|
|
if (least >= bound) |
884 |
|
|
throw new IllegalArgumentException(); |
885 |
|
|
return new LongIntervalRandomGenerator(least, bound); |
886 |
|
|
} |
887 |
|
|
static final class LongIntervalRandomGenerator implements LongGenerator { |
888 |
|
|
final long least; |
889 |
|
|
final long range; |
890 |
|
|
LongIntervalRandomGenerator(long least, long bound) { |
891 |
|
|
this.least = least; this.range = bound - least; |
892 |
|
|
} |
893 |
|
|
public long op() { |
894 |
dl |
1.2 |
return ThreadLocalRandom.current().nextLong(range) + least; |
895 |
dl |
1.1 |
} |
896 |
|
|
} |
897 |
|
|
|
898 |
|
|
/** |
899 |
|
|
* Returns a generator producing uniform random values with the |
900 |
dl |
1.2 |
* same properties as {@link java.util.Random#nextInt} |
901 |
dl |
1.1 |
*/ |
902 |
|
|
public static IntGenerator intRandom() { |
903 |
|
|
return IntRandomGenerator.generator; |
904 |
|
|
} |
905 |
|
|
static final class IntRandomGenerator implements IntGenerator { |
906 |
|
|
static final IntRandomGenerator generator = |
907 |
|
|
new IntRandomGenerator(); |
908 |
|
|
public int op() { |
909 |
dl |
1.2 |
return ThreadLocalRandom.current().nextInt(); |
910 |
dl |
1.1 |
} |
911 |
|
|
} |
912 |
|
|
|
913 |
|
|
/** |
914 |
|
|
* Returns a generator producing uniform random values with the |
915 |
dl |
1.2 |
* same properties as {@link java.util.Random#nextInt(int)} |
916 |
dl |
1.1 |
* @param bound the upper bound (exclusive) of opd values |
917 |
|
|
*/ |
918 |
|
|
public static IntGenerator intRandom(int bound) { |
919 |
|
|
if (bound <= 0) |
920 |
|
|
throw new IllegalArgumentException(); |
921 |
|
|
return new IntBoundedRandomGenerator(bound); |
922 |
|
|
} |
923 |
|
|
static final class IntBoundedRandomGenerator implements IntGenerator { |
924 |
|
|
final int bound; |
925 |
|
|
IntBoundedRandomGenerator(int bound) { this.bound = bound; } |
926 |
|
|
public int op() { |
927 |
dl |
1.2 |
return ThreadLocalRandom.current().nextInt(bound); |
928 |
dl |
1.1 |
} |
929 |
|
|
} |
930 |
|
|
|
931 |
|
|
/** |
932 |
|
|
* Returns a generator producing uniform random values between the |
933 |
dl |
1.2 |
* given least value (inclusive) and bound (exclusive) |
934 |
dl |
1.1 |
* @param least the least value returned |
935 |
|
|
* @param bound the upper bound (exclusive) of opd values |
936 |
|
|
*/ |
937 |
|
|
public static IntGenerator intRandom(int least, int bound) { |
938 |
|
|
if (least >= bound) |
939 |
|
|
throw new IllegalArgumentException(); |
940 |
|
|
return new IntIntervalRandomGenerator(least, bound); |
941 |
|
|
} |
942 |
|
|
static final class IntIntervalRandomGenerator implements IntGenerator { |
943 |
|
|
final int least; |
944 |
|
|
final int range; |
945 |
|
|
IntIntervalRandomGenerator(int least, int bound) { |
946 |
|
|
this.least = least; this.range = bound - least; |
947 |
|
|
} |
948 |
|
|
public int op() { |
949 |
dl |
1.2 |
return ThreadLocalRandom.current().nextInt(range) + least; |
950 |
dl |
1.1 |
} |
951 |
|
|
} |
952 |
|
|
|
953 |
|
|
/** |
954 |
|
|
* Returns a predicate evaluating to true if the |
955 |
|
|
* first argument <tt>equals</tt> the second |
956 |
|
|
*/ |
957 |
|
|
public static BinaryPredicate<Object, Object> equalityPredicate() { |
958 |
|
|
return EqualityPredicate.predicate; |
959 |
|
|
} |
960 |
|
|
static final class EqualityPredicate implements BinaryPredicate<Object, Object> { |
961 |
|
|
static final EqualityPredicate predicate = |
962 |
|
|
new EqualityPredicate(); |
963 |
|
|
public final boolean op(Object x, Object y) { |
964 |
|
|
return x.equals(y); |
965 |
|
|
} |
966 |
|
|
} |
967 |
|
|
|
968 |
|
|
/** |
969 |
|
|
* Returns a predicate evaluating to true if the |
970 |
|
|
* first argument <tt>==</tt> the second |
971 |
|
|
*/ |
972 |
|
|
public static BinaryPredicate<Object, Object> identityPredicate() { |
973 |
|
|
return IdentityPredicate.predicate; |
974 |
|
|
} |
975 |
|
|
static final class IdentityPredicate implements BinaryPredicate<Object, Object> { |
976 |
|
|
static final IdentityPredicate predicate = |
977 |
|
|
new IdentityPredicate(); |
978 |
|
|
public final boolean op(Object x, Object y) { |
979 |
|
|
return x == y; |
980 |
|
|
} |
981 |
|
|
} |
982 |
|
|
|
983 |
|
|
/** |
984 |
|
|
* Returns a predicate evaluating to true if the |
985 |
|
|
* first argument <tt>==</tt> the second |
986 |
|
|
*/ |
987 |
|
|
public static BinaryIntPredicate intEqualityPredicate() { |
988 |
|
|
return IntEqualityPredicate.predicate; |
989 |
|
|
} |
990 |
|
|
static final class IntEqualityPredicate implements BinaryIntPredicate { |
991 |
|
|
static final IntEqualityPredicate predicate = |
992 |
|
|
new IntEqualityPredicate(); |
993 |
|
|
public final boolean op(int x, int y) { |
994 |
|
|
return x == y; |
995 |
|
|
} |
996 |
|
|
} |
997 |
|
|
|
998 |
|
|
/** |
999 |
|
|
* Returns a predicate evaluating to true if the |
1000 |
|
|
* first argument <tt>==</tt> the second |
1001 |
|
|
*/ |
1002 |
|
|
public static BinaryLongPredicate longEqualityPredicate() { |
1003 |
|
|
return LongEqualityPredicate.predicate; |
1004 |
|
|
} |
1005 |
|
|
static final class LongEqualityPredicate implements BinaryLongPredicate { |
1006 |
|
|
static final LongEqualityPredicate predicate = |
1007 |
|
|
new LongEqualityPredicate(); |
1008 |
|
|
public final boolean op(long x, long y) { |
1009 |
|
|
return x == y; |
1010 |
|
|
} |
1011 |
|
|
} |
1012 |
|
|
|
1013 |
|
|
/** |
1014 |
|
|
* Returns a predicate evaluating to true if the |
1015 |
|
|
* first argument <tt>==</tt> the second |
1016 |
|
|
*/ |
1017 |
|
|
public static BinaryDoublePredicate doubleEqualityPredicate() { |
1018 |
|
|
return DoubleEqualityPredicate.predicate; |
1019 |
|
|
} |
1020 |
|
|
static final class DoubleEqualityPredicate implements BinaryDoublePredicate { |
1021 |
|
|
static final DoubleEqualityPredicate predicate = |
1022 |
|
|
new DoubleEqualityPredicate(); |
1023 |
|
|
public final boolean op(double x, double y) { |
1024 |
|
|
return x == y; |
1025 |
|
|
} |
1026 |
|
|
} |
1027 |
|
|
|
1028 |
|
|
|
1029 |
|
|
/** |
1030 |
|
|
* Returns a predicate evaluating to true if the |
1031 |
|
|
* first argument <tt>!equals</tt> the second |
1032 |
|
|
*/ |
1033 |
|
|
public static BinaryPredicate<Object, Object> inequalityPredicate() { |
1034 |
|
|
return InequalityPredicate.predicate; |
1035 |
|
|
} |
1036 |
|
|
static final class InequalityPredicate implements BinaryPredicate<Object, Object> { |
1037 |
|
|
static final InequalityPredicate predicate = |
1038 |
|
|
new InequalityPredicate(); |
1039 |
|
|
public final boolean op(Object x, Object y) { |
1040 |
|
|
return !x.equals(y); |
1041 |
|
|
} |
1042 |
|
|
} |
1043 |
|
|
|
1044 |
|
|
/** |
1045 |
|
|
* Returns a predicate evaluating to true if the |
1046 |
|
|
* first argument <tt>!=</tt> the second |
1047 |
|
|
*/ |
1048 |
|
|
public static BinaryPredicate<Object, Object> nonidentityPredicate() { |
1049 |
|
|
return NonidentityPredicate.predicate; |
1050 |
|
|
} |
1051 |
|
|
static final class NonidentityPredicate implements BinaryPredicate<Object, Object> { |
1052 |
|
|
static final NonidentityPredicate predicate = |
1053 |
|
|
new NonidentityPredicate(); |
1054 |
|
|
public final boolean op(Object x, Object y) { |
1055 |
|
|
return x != y; |
1056 |
|
|
} |
1057 |
|
|
} |
1058 |
|
|
|
1059 |
|
|
/** |
1060 |
|
|
* Returns a predicate evaluating to true if the |
1061 |
|
|
* first argument <tt>!=</tt> the second |
1062 |
|
|
*/ |
1063 |
|
|
public static BinaryIntPredicate intInequalityPredicate() { |
1064 |
|
|
return IntInequalityPredicate.predicate; |
1065 |
|
|
} |
1066 |
|
|
static final class IntInequalityPredicate implements BinaryIntPredicate { |
1067 |
|
|
static final IntInequalityPredicate predicate = |
1068 |
|
|
new IntInequalityPredicate(); |
1069 |
|
|
public final boolean op(int x, int y) { |
1070 |
|
|
return x != y; |
1071 |
|
|
} |
1072 |
|
|
} |
1073 |
|
|
|
1074 |
|
|
/** |
1075 |
|
|
* Returns a predicate evaluating to true if the |
1076 |
|
|
* first argument <tt>==</tt> the second |
1077 |
|
|
*/ |
1078 |
|
|
public static BinaryLongPredicate longInequalityPredicate() { |
1079 |
|
|
return LongInequalityPredicate.predicate; |
1080 |
|
|
} |
1081 |
|
|
static final class LongInequalityPredicate implements BinaryLongPredicate { |
1082 |
|
|
static final LongInequalityPredicate predicate = |
1083 |
|
|
new LongInequalityPredicate(); |
1084 |
|
|
public final boolean op(long x, long y) { |
1085 |
|
|
return x != y; |
1086 |
|
|
} |
1087 |
|
|
} |
1088 |
|
|
|
1089 |
|
|
/** |
1090 |
|
|
* Returns a predicate evaluating to true if the |
1091 |
|
|
* first argument <tt>!=</tt> the second |
1092 |
|
|
*/ |
1093 |
|
|
public static BinaryDoublePredicate doubleInequalityPredicate() { |
1094 |
|
|
return DoubleInequalityPredicate.predicate; |
1095 |
|
|
} |
1096 |
|
|
static final class DoubleInequalityPredicate implements BinaryDoublePredicate { |
1097 |
|
|
static final DoubleInequalityPredicate predicate = |
1098 |
|
|
new DoubleInequalityPredicate(); |
1099 |
|
|
public final boolean op(double x, double y) { |
1100 |
|
|
return x != y; |
1101 |
|
|
} |
1102 |
|
|
} |
1103 |
|
|
|
1104 |
|
|
|
1105 |
|
|
} |