src/extra166y/ParallelDoubleArrayWithFilter.java

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

package extra166y;
import jsr166y.*;
import static extra166y.Ops.*;
import java.util.*;
import java.util.concurrent.atomic.*;
import java.lang.reflect.Array;

/**
 * A prefix view of ParallelDoubleArray that causes operations to apply
 * only to elements for which a selector returns true.
 * Instances of this class may be constructed only via prefix
 * methods of ParallelDoubleArray or its other prefix classes.
 */
public abstract class ParallelDoubleArrayWithFilter extends ParallelDoubleArrayWithDoubleMapping {
    ParallelDoubleArrayWithFilter
        (ForkJoinPool ex, int origin, int fence, double[] array) {
        super(ex, origin, fence, array);
    }

    /**
     * Replaces elements with the results of applying the given
     * op to their current values.
     * @param op the op
     * @return this (to simplify use in expressions)
     */
    public ParallelDoubleArrayWithFilter replaceWithMapping(DoubleOp  op) {
        ex.invoke(new PAS.FJDTransform(this, origin,
                                       fence, null, op));
        return this;
    }

    /**
     * Replaces elements with the results of applying the given
     * op to their indices
     * @param op the op
     * @return this (to simplify use in expressions)
     */
    public ParallelDoubleArrayWithFilter replaceWithMappedIndex(IntToDouble op) {
        ex.invoke(new PAS.FJDIndexMap(this, origin, fence,
                                      null, op));
        return this;
    }

    /**
     * Replaces elements with the results of applying the given
     * mapping to each index and current element value
     * @param op the op
     * @return this (to simplify use in expressions)
     */
    public ParallelDoubleArrayWithFilter replaceWithMappedIndex(IntAndDoubleToDouble op) {
        ex.invoke(new PAS.FJDBinaryIndexMap
                  (this, origin, fence, null, op));
        return this;
    }

    /**
     * Replaces elements with results of applying the given
     * generator.
     * @param generator the generator
     * @return this (to simplify use in expressions)
     */
    public ParallelDoubleArrayWithFilter replaceWithGeneratedValue(DoubleGenerator generator) {
        ex.invoke(new PAS.FJDGenerate
                  (this, origin, fence, null, generator));
        return this;
    }

    /**
     * Replaces elements with the given value.
     * @param value the value
     * @return this (to simplify use in expressions)
     */
    public ParallelDoubleArrayWithFilter replaceWithValue(double value) {
        ex.invoke(new PAS.FJDFill(this, origin, fence,
                                  null, value));
        return this;
    }

    /**
     * Replaces elements with results of applying
     * <tt>op(thisElement, otherElement)</tt>
     * @param other the other array
     * @param combiner the combiner
     * @return this (to simplify use in expressions)
     */
    public ParallelDoubleArrayWithFilter replaceWithMapping(BinaryDoubleOp combiner,
                                   ParallelDoubleArrayWithDoubleMapping other) {
        ex.invoke(new PAS.FJDPACombineInPlace
                  (this, origin, fence, null,
                   other, other.origin - origin, combiner));
        return this;
    }

    /**
     * Replaces elements with results of applying
     * <tt>op(thisElement, otherElement)</tt>
     * @param other the other array
     * @param combiner the combiner
     * @return this (to simplify use in expressions)
     */
    public ParallelDoubleArrayWithFilter replaceWithMapping
        (BinaryDoubleOp combiner,
         double[] other) {
        ex.invoke(new PAS.FJDCombineInPlace
                  (this, origin, fence, null, other,
                   -origin, combiner));
        return this;
    }

    /**
     * Returns a new ParallelDoubleArray containing only unique
     * elements (that is, without any duplicates).
     * @return the new ParallelDoubleArray
     */
    public ParallelDoubleArray allUniqueElements() {
        PAS.UniquifierTable tab = new PAS.UniquifierTable
            (fence - origin, this, false);
        PAS.FJDUniquifier f = new PAS.FJDUniquifier
            (this, origin, fence, null, tab);
        ex.invoke(f);
        double[] res = tab.uniqueDoubles(f.count);
        return new ParallelDoubleArray(ex, res);
    }


    /**
     * Returns an operation prefix that causes a method to operate
     * only on elements for which the current selector (if
     * present) and the given selector returns true
     * @param selector the selector
     * @return operation prefix
     */
    public abstract ParallelDoubleArrayWithFilter withFilter
        (DoublePredicate selector);

    /**
     * Returns an operation prefix that causes a method to operate
     * only on elements for which the current selector (if
     * present) and the given binary selector returns true
     * @param selector the selector
     * @return operation prefix
     */
    public ParallelDoubleArrayWithFilter withFilter
        (BinaryDoublePredicate selector,
         ParallelDoubleArrayWithDoubleMapping other) {
        return withIndexedFilter(AbstractParallelAnyArray.indexedSelector(selector, other, origin));
    }

    /**
     * Returns an operation prefix that causes a method to operate
     * only on elements for which the current selector (if
     * present) and the given indexed selector returns true
     * @param selector the selector
     * @return operation prefix
     */
    public abstract ParallelDoubleArrayWithFilter withIndexedFilter
        (IntAndDoublePredicate selector);

    /**
     * Returns true if all elements at the same relative positions
     * of this and other array are equal.
     * @param other the other array
     * @return true if equal
     */
    public boolean hasAllEqualElements
        (ParallelDoubleArrayWithDoubleMapping other) {
        return withFilter(CommonOps.doubleInequalityPredicate(),
                          other).anyIndex() < 0;
    }

    final void leafTransfer(int lo, int hi, double[] dest, int offset) {
        final double[] a = this.array;
        for (int i = lo; i < hi; ++i)
            dest[offset++] = (a[i]);
    }

    final void leafTransferByIndex(int[] indices, int loIdx, int hiIdx,
                                   double[] dest, int offset) {
        final double[] a = this.array;
        for (int i = loIdx; i < hiIdx; ++i)
            dest[offset++] = (a[indices[i]]);
    }

    final double dget(int i) { return this.array[i]; }

}

Revision:	1.2
Committed:	Tue Mar 15 19:47:02 2011 UTC (13 years, 2 months ago) by jsr166
Branch:	MAIN
CVS Tags:	jdk7-compat, release-1_7_0
Changes since 1.1:	+1 -1 lines
Log Message:	Update Creative Commons license URL in legal notices
#	Content
1	/*
2	* Written by Doug Lea with assistance from members of JCP JSR-166
3	* Expert Group and released to the public domain, as explained at
4	* http://creativecommons.org/publicdomain/zero/1.0/
5	*/
6
7	package extra166y;
8	import jsr166y.*;
9	import static extra166y.Ops.*;
10	import java.util.*;
11	import java.util.concurrent.atomic.*;
12	import java.lang.reflect.Array;
13
14	/**
15	* A prefix view of ParallelDoubleArray that causes operations to apply
16	* only to elements for which a selector returns true.
17	* Instances of this class may be constructed only via prefix
18	* methods of ParallelDoubleArray or its other prefix classes.
19	*/
20	public abstract class ParallelDoubleArrayWithFilter extends ParallelDoubleArrayWithDoubleMapping {
21	ParallelDoubleArrayWithFilter
22	(ForkJoinPool ex, int origin, int fence, double[] array) {
23	super(ex, origin, fence, array);
24	}
25
26	/**
27	* Replaces elements with the results of applying the given
28	* op to their current values.
29	* @param op the op
30	* @return this (to simplify use in expressions)
31	*/
32	public ParallelDoubleArrayWithFilter replaceWithMapping(DoubleOp op) {
33	ex.invoke(new PAS.FJDTransform(this, origin,
34	fence, null, op));
35	return this;
36	}
37
38	/**
39	* Replaces elements with the results of applying the given
40	* op to their indices
41	* @param op the op
42	* @return this (to simplify use in expressions)
43	*/
44	public ParallelDoubleArrayWithFilter replaceWithMappedIndex(IntToDouble op) {
45	ex.invoke(new PAS.FJDIndexMap(this, origin, fence,
46	null, op));
47	return this;
48	}
49
50	/**
51	* Replaces elements with the results of applying the given
52	* mapping to each index and current element value
53	* @param op the op
54	* @return this (to simplify use in expressions)
55	*/
56	public ParallelDoubleArrayWithFilter replaceWithMappedIndex(IntAndDoubleToDouble op) {
57	ex.invoke(new PAS.FJDBinaryIndexMap
58	(this, origin, fence, null, op));
59	return this;
60	}
61
62	/**
63	* Replaces elements with results of applying the given
64	* generator.
65	* @param generator the generator
66	* @return this (to simplify use in expressions)
67	*/
68	public ParallelDoubleArrayWithFilter replaceWithGeneratedValue(DoubleGenerator generator) {
69	ex.invoke(new PAS.FJDGenerate
70	(this, origin, fence, null, generator));
71	return this;
72	}
73
74	/**
75	* Replaces elements with the given value.
76	* @param value the value
77	* @return this (to simplify use in expressions)
78	*/
79	public ParallelDoubleArrayWithFilter replaceWithValue(double value) {
80	ex.invoke(new PAS.FJDFill(this, origin, fence,
81	null, value));
82	return this;
83	}
84
85	/**
86	* Replaces elements with results of applying
87	* <tt>op(thisElement, otherElement)</tt>
88	* @param other the other array
89	* @param combiner the combiner
90	* @return this (to simplify use in expressions)
91	*/
92	public ParallelDoubleArrayWithFilter replaceWithMapping(BinaryDoubleOp combiner,
93	ParallelDoubleArrayWithDoubleMapping other) {
94	ex.invoke(new PAS.FJDPACombineInPlace
95	(this, origin, fence, null,
96	other, other.origin - origin, combiner));
97	return this;
98	}
99
100	/**
101	* Replaces elements with results of applying
102	* <tt>op(thisElement, otherElement)</tt>
103	* @param other the other array
104	* @param combiner the combiner
105	* @return this (to simplify use in expressions)
106	*/
107	public ParallelDoubleArrayWithFilter replaceWithMapping
108	(BinaryDoubleOp combiner,
109	double[] other) {
110	ex.invoke(new PAS.FJDCombineInPlace
111	(this, origin, fence, null, other,
112	-origin, combiner));
113	return this;
114	}
115
116	/**
117	* Returns a new ParallelDoubleArray containing only unique
118	* elements (that is, without any duplicates).
119	* @return the new ParallelDoubleArray
120	*/
121	public ParallelDoubleArray allUniqueElements() {
122	PAS.UniquifierTable tab = new PAS.UniquifierTable
123	(fence - origin, this, false);
124	PAS.FJDUniquifier f = new PAS.FJDUniquifier
125	(this, origin, fence, null, tab);
126	ex.invoke(f);
127	double[] res = tab.uniqueDoubles(f.count);
128	return new ParallelDoubleArray(ex, res);
129	}
130
131
132	/**
133	* Returns an operation prefix that causes a method to operate
134	* only on elements for which the current selector (if
135	* present) and the given selector returns true
136	* @param selector the selector
137	* @return operation prefix
138	*/
139	public abstract ParallelDoubleArrayWithFilter withFilter
140	(DoublePredicate selector);
141
142	/**
143	* Returns an operation prefix that causes a method to operate
144	* only on elements for which the current selector (if
145	* present) and the given binary selector returns true
146	* @param selector the selector
147	* @return operation prefix
148	*/
149	public ParallelDoubleArrayWithFilter withFilter
150	(BinaryDoublePredicate selector,
151	ParallelDoubleArrayWithDoubleMapping other) {
152	return withIndexedFilter(AbstractParallelAnyArray.indexedSelector(selector, other, origin));
153	}
154
155	/**
156	* Returns an operation prefix that causes a method to operate
157	* only on elements for which the current selector (if
158	* present) and the given indexed selector returns true
159	* @param selector the selector
160	* @return operation prefix
161	*/
162	public abstract ParallelDoubleArrayWithFilter withIndexedFilter
163	(IntAndDoublePredicate selector);
164
165	/**
166	* Returns true if all elements at the same relative positions
167	* of this and other array are equal.
168	* @param other the other array
169	* @return true if equal
170	*/
171	public boolean hasAllEqualElements
172	(ParallelDoubleArrayWithDoubleMapping other) {
173	return withFilter(CommonOps.doubleInequalityPredicate(),
174	other).anyIndex() < 0;
175	}
176
177	final void leafTransfer(int lo, int hi, double[] dest, int offset) {
178	final double[] a = this.array;
179	for (int i = lo; i < hi; ++i)
180	dest[offset++] = (a[i]);
181	}
182
183	final void leafTransferByIndex(int[] indices, int loIdx, int hiIdx,
184	double[] dest, int offset) {
185	final double[] a = this.array;
186	for (int i = loIdx; i < hiIdx; ++i)
187	dest[offset++] = (a[indices[i]]);
188	}
189
190	final double dget(int i) { return this.array[i]; }
191
192	}
193