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/licenses/publicdomain |
5 |
< |
*/ |
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 java.util.concurrent; |
8 |
|
|
9 |
+ |
import java.time.temporal.ChronoUnit; |
10 |
+ |
import java.util.Objects; |
11 |
+ |
|
12 |
|
/** |
13 |
< |
* A <tt>TimeUnit</tt> represents time durations at a given unit of |
13 |
> |
* A {@code TimeUnit} represents time durations at a given unit of |
14 |
|
* granularity and provides utility methods to convert across units, |
15 |
|
* and to perform timing and delay operations in these units. A |
16 |
< |
* <tt>TimeUnit</tt> does not maintain time information, but only |
16 |
> |
* {@code TimeUnit} does not maintain time information, but only |
17 |
|
* helps organize and use time representations that may be maintained |
18 |
|
* separately across various contexts. A nanosecond is defined as one |
19 |
|
* thousandth of a microsecond, a microsecond as one thousandth of a |
21 |
|
* as sixty seconds, an hour as sixty minutes, and a day as twenty four |
22 |
|
* hours. |
23 |
|
* |
24 |
< |
* <p>A <tt>TimeUnit</tt> is mainly used to inform time-based methods |
24 |
> |
* <p>A {@code TimeUnit} is mainly used to inform time-based methods |
25 |
|
* how a given timing parameter should be interpreted. For example, |
26 |
|
* the following code will timeout in 50 milliseconds if the {@link |
27 |
|
* java.util.concurrent.locks.Lock lock} is not available: |
28 |
|
* |
29 |
< |
* <pre> Lock lock = ...; |
30 |
< |
* if ( lock.tryLock(50L, TimeUnit.MILLISECONDS) ) ... |
31 |
< |
* </pre> |
29 |
> |
* <pre> {@code |
30 |
> |
* Lock lock = ...; |
31 |
> |
* if (lock.tryLock(50L, TimeUnit.MILLISECONDS)) ...}</pre> |
32 |
> |
* |
33 |
|
* while this code will timeout in 50 seconds: |
34 |
< |
* <pre> |
35 |
< |
* Lock lock = ...; |
36 |
< |
* if ( lock.tryLock(50L, TimeUnit.SECONDS) ) ... |
33 |
< |
* </pre> |
34 |
> |
* <pre> {@code |
35 |
> |
* Lock lock = ...; |
36 |
> |
* if (lock.tryLock(50L, TimeUnit.SECONDS)) ...}</pre> |
37 |
|
* |
38 |
|
* Note however, that there is no guarantee that a particular timeout |
39 |
|
* implementation will be able to notice the passage of time at the |
40 |
< |
* same granularity as the given <tt>TimeUnit</tt>. |
40 |
> |
* same granularity as the given {@code TimeUnit}. |
41 |
|
* |
42 |
|
* @since 1.5 |
43 |
|
* @author Doug Lea |
44 |
|
*/ |
45 |
|
public enum TimeUnit { |
46 |
< |
NANOSECONDS (0) { |
47 |
< |
public long toNanos(long d) { return d; } |
48 |
< |
public long toMicros(long d) { return d/(C1/C0); } |
49 |
< |
public long toMillis(long d) { return d/(C2/C0); } |
50 |
< |
public long toSeconds(long d) { return d/(C3/C0); } |
51 |
< |
public long toMinutes(long d) { return d/(C4/C0); } |
52 |
< |
public long toHours(long d) { return d/(C5/C0); } |
53 |
< |
public long toDays(long d) { return d/(C6/C0); } |
54 |
< |
public long convert(long d, TimeUnit u) { return u.toNanos(d); } |
55 |
< |
int excessNanos(long d, long m) { return (int)(d - (m*C2)); } |
56 |
< |
}, |
57 |
< |
MICROSECONDS (1) { |
58 |
< |
public long toNanos(long d) { return x(d, C1/C0, MAX/(C1/C0)); } |
59 |
< |
public long toMicros(long d) { return d; } |
60 |
< |
public long toMillis(long d) { return d/(C2/C1); } |
61 |
< |
public long toSeconds(long d) { return d/(C3/C1); } |
62 |
< |
public long toMinutes(long d) { return d/(C4/C1); } |
63 |
< |
public long toHours(long d) { return d/(C5/C1); } |
64 |
< |
public long toDays(long d) { return d/(C6/C1); } |
65 |
< |
public long convert(long d, TimeUnit u) { return u.toMicros(d); } |
66 |
< |
int excessNanos(long d, long m) { return (int)((d*C1) - (m*C2)); } |
67 |
< |
}, |
68 |
< |
MILLISECONDS (2) { |
69 |
< |
public long toNanos(long d) { return x(d, C2/C0, MAX/(C2/C0)); } |
70 |
< |
public long toMicros(long d) { return x(d, C2/C1, MAX/(C2/C1)); } |
71 |
< |
public long toMillis(long d) { return d; } |
72 |
< |
public long toSeconds(long d) { return d/(C3/C2); } |
73 |
< |
public long toMinutes(long d) { return d/(C4/C2); } |
74 |
< |
public long toHours(long d) { return d/(C5/C2); } |
75 |
< |
public long toDays(long d) { return d/(C6/C2); } |
76 |
< |
public long convert(long d, TimeUnit u) { return u.toMillis(d); } |
77 |
< |
int excessNanos(long d, long m) { return 0; } |
78 |
< |
}, |
79 |
< |
SECONDS (3) { |
80 |
< |
public long toNanos(long d) { return x(d, C3/C0, MAX/(C3/C0)); } |
81 |
< |
public long toMicros(long d) { return x(d, C3/C1, MAX/(C3/C1)); } |
82 |
< |
public long toMillis(long d) { return x(d, C3/C2, MAX/(C3/C2)); } |
83 |
< |
public long toSeconds(long d) { return d; } |
84 |
< |
public long toMinutes(long d) { return d/(C4/C3); } |
85 |
< |
public long toHours(long d) { return d/(C5/C3); } |
86 |
< |
public long toDays(long d) { return d/(C6/C3); } |
87 |
< |
public long convert(long d, TimeUnit u) { return u.toSeconds(d); } |
88 |
< |
int excessNanos(long d, long m) { return 0; } |
89 |
< |
}, |
90 |
< |
MINUTES (4) { |
91 |
< |
public long toNanos(long d) { return x(d, C4/C0, MAX/(C4/C0)); } |
92 |
< |
public long toMicros(long d) { return x(d, C4/C1, MAX/(C4/C1)); } |
93 |
< |
public long toMillis(long d) { return x(d, C4/C2, MAX/(C4/C2)); } |
94 |
< |
public long toSeconds(long d) { return x(d, C4/C3, MAX/(C4/C3)); } |
95 |
< |
public long toMinutes(long d) { return d; } |
96 |
< |
public long toHours(long d) { return d/(C5/C4); } |
97 |
< |
public long toDays(long d) { return d/(C6/C4); } |
98 |
< |
public long convert(long d, TimeUnit u) { return u.toMinutes(d); } |
99 |
< |
int excessNanos(long d, long m) { return 0; } |
100 |
< |
}, |
101 |
< |
HOURS (5) { |
102 |
< |
public long toNanos(long d) { return x(d, C5/C0, MAX/(C5/C0)); } |
103 |
< |
public long toMicros(long d) { return x(d, C5/C1, MAX/(C5/C1)); } |
104 |
< |
public long toMillis(long d) { return x(d, C5/C2, MAX/(C5/C2)); } |
105 |
< |
public long toSeconds(long d) { return x(d, C5/C3, MAX/(C5/C3)); } |
106 |
< |
public long toMinutes(long d) { return x(d, C5/C4, MAX/(C5/C4)); } |
107 |
< |
public long toHours(long d) { return d; } |
108 |
< |
public long toDays(long d) { return d/(C6/C5); } |
109 |
< |
public long convert(long d, TimeUnit u) { return u.toHours(d); } |
110 |
< |
int excessNanos(long d, long m) { return 0; } |
111 |
< |
}, |
112 |
< |
DAYS (6) { |
113 |
< |
public long toNanos(long d) { return x(d, C6/C0, MAX/(C6/C0)); } |
114 |
< |
public long toMicros(long d) { return x(d, C6/C1, MAX/(C6/C1)); } |
115 |
< |
public long toMillis(long d) { return x(d, C6/C2, MAX/(C6/C2)); } |
116 |
< |
public long toSeconds(long d) { return x(d, C6/C3, MAX/(C6/C3)); } |
117 |
< |
public long toMinutes(long d) { return x(d, C6/C4, MAX/(C6/C4)); } |
115 |
< |
public long toHours(long d) { return x(d, C6/C5, MAX/(C6/C5)); } |
116 |
< |
public long toDays(long d) { return d; } |
117 |
< |
public long convert(long d, TimeUnit u) { return u.toDays(d); } |
118 |
< |
int excessNanos(long d, long m) { return 0; } |
119 |
< |
}; |
120 |
< |
|
121 |
< |
/** |
122 |
< |
* The index of this unit. This value is no longer used in this |
123 |
< |
* version of this class, but is retained for serialization |
124 |
< |
* compatibility with previous version. |
125 |
< |
*/ |
126 |
< |
private final int index; |
127 |
< |
|
128 |
< |
/** Internal constructor */ |
129 |
< |
TimeUnit(int index) { |
130 |
< |
this.index = index; |
131 |
< |
} |
132 |
< |
|
133 |
< |
// Handy constants for conversion methods |
134 |
< |
static final long C0 = 1L; |
135 |
< |
static final long C1 = C0 * 1000L; |
136 |
< |
static final long C2 = C1 * 1000L; |
137 |
< |
static final long C3 = C2 * 1000L; |
138 |
< |
static final long C4 = C3 * 60L; |
139 |
< |
static final long C5 = C4 * 60L; |
140 |
< |
static final long C6 = C5 * 24L; |
141 |
< |
|
142 |
< |
static final long MAX = Long.MAX_VALUE; |
143 |
< |
|
144 |
< |
/** |
145 |
< |
* Scale d by m, checking for overflow. |
146 |
< |
* This has a short name to make above code more readable. |
147 |
< |
*/ |
148 |
< |
static long x(long d, long m, long over) { |
149 |
< |
if (d > over) return Long.MAX_VALUE; |
150 |
< |
if (d < -over) return Long.MIN_VALUE; |
151 |
< |
return d * m; |
152 |
< |
} |
153 |
< |
|
154 |
< |
/** |
155 |
< |
* Convert the given time duration in the given unit to this |
156 |
< |
* unit. Conversions from finer to coarser granularities |
157 |
< |
* truncate, so lose precision. For example converting |
158 |
< |
* <tt>999</tt> milliseconds to seconds results in |
159 |
< |
* <tt>0</tt>. Conversions from coarser to finer granularities |
160 |
< |
* with arguments that would numerically overflow saturate to |
161 |
< |
* <tt>Long.MIN_VALUE</tt> if negative or <tt>Long.MAX_VALUE</tt> |
162 |
< |
* if positive. |
46 |
> |
/** |
47 |
> |
* Time unit representing one thousandth of a microsecond. |
48 |
> |
*/ |
49 |
> |
NANOSECONDS(TimeUnit.NANO_SCALE), |
50 |
> |
/** |
51 |
> |
* Time unit representing one thousandth of a millisecond. |
52 |
> |
*/ |
53 |
> |
MICROSECONDS(TimeUnit.MICRO_SCALE), |
54 |
> |
/** |
55 |
> |
* Time unit representing one thousandth of a second. |
56 |
> |
*/ |
57 |
> |
MILLISECONDS(TimeUnit.MILLI_SCALE), |
58 |
> |
/** |
59 |
> |
* Time unit representing one second. |
60 |
> |
*/ |
61 |
> |
SECONDS(TimeUnit.SECOND_SCALE), |
62 |
> |
/** |
63 |
> |
* Time unit representing sixty seconds. |
64 |
> |
* @since 1.6 |
65 |
> |
*/ |
66 |
> |
MINUTES(TimeUnit.MINUTE_SCALE), |
67 |
> |
/** |
68 |
> |
* Time unit representing sixty minutes. |
69 |
> |
* @since 1.6 |
70 |
> |
*/ |
71 |
> |
HOURS(TimeUnit.HOUR_SCALE), |
72 |
> |
/** |
73 |
> |
* Time unit representing twenty four hours. |
74 |
> |
* @since 1.6 |
75 |
> |
*/ |
76 |
> |
DAYS(TimeUnit.DAY_SCALE); |
77 |
> |
|
78 |
> |
// Scales as constants |
79 |
> |
private static final long NANO_SCALE = 1L; |
80 |
> |
private static final long MICRO_SCALE = 1000L * NANO_SCALE; |
81 |
> |
private static final long MILLI_SCALE = 1000L * MICRO_SCALE; |
82 |
> |
private static final long SECOND_SCALE = 1000L * MILLI_SCALE; |
83 |
> |
private static final long MINUTE_SCALE = 60L * SECOND_SCALE; |
84 |
> |
private static final long HOUR_SCALE = 60L * MINUTE_SCALE; |
85 |
> |
private static final long DAY_SCALE = 24L * HOUR_SCALE; |
86 |
> |
|
87 |
> |
/* |
88 |
> |
* Instances cache conversion ratios and saturation cutoffs for |
89 |
> |
* the units up through SECONDS. Other cases compute them, in |
90 |
> |
* method cvt. |
91 |
> |
*/ |
92 |
> |
|
93 |
> |
private final long scale; |
94 |
> |
private final long maxNanos; |
95 |
> |
private final long maxMicros; |
96 |
> |
private final long maxMillis; |
97 |
> |
private final long maxSecs; |
98 |
> |
private final long microRatio; |
99 |
> |
private final int milliRatio; // fits in 32 bits |
100 |
> |
private final int secRatio; // fits in 32 bits |
101 |
> |
|
102 |
> |
private TimeUnit(long s) { |
103 |
> |
this.scale = s; |
104 |
> |
this.maxNanos = Long.MAX_VALUE / s; |
105 |
> |
long ur = (s >= MICRO_SCALE) ? (s / MICRO_SCALE) : (MICRO_SCALE / s); |
106 |
> |
this.microRatio = ur; |
107 |
> |
this.maxMicros = Long.MAX_VALUE / ur; |
108 |
> |
long mr = (s >= MILLI_SCALE) ? (s / MILLI_SCALE) : (MILLI_SCALE / s); |
109 |
> |
this.milliRatio = (int)mr; |
110 |
> |
this.maxMillis = Long.MAX_VALUE / mr; |
111 |
> |
long sr = (s >= SECOND_SCALE) ? (s / SECOND_SCALE) : (SECOND_SCALE / s); |
112 |
> |
this.secRatio = (int)sr; |
113 |
> |
this.maxSecs = Long.MAX_VALUE / sr; |
114 |
> |
} |
115 |
> |
|
116 |
> |
/** |
117 |
> |
* General conversion utility. |
118 |
|
* |
119 |
< |
* @param duration the time duration in the given <tt>unit</tt> |
120 |
< |
* @param unit the unit of the <tt>duration</tt> argument |
119 |
> |
* @param d duration |
120 |
> |
* @param dst result unit scale |
121 |
> |
* @param src source unit scale |
122 |
> |
*/ |
123 |
> |
private static long cvt(long d, long dst, long src) { |
124 |
> |
long r, m; |
125 |
> |
if (src == dst) |
126 |
> |
return d; |
127 |
> |
else if (src < dst) |
128 |
> |
return d / (dst / src); |
129 |
> |
else if (d > (m = Long.MAX_VALUE / (r = src / dst))) |
130 |
> |
return Long.MAX_VALUE; |
131 |
> |
else if (d < -m) |
132 |
> |
return Long.MIN_VALUE; |
133 |
> |
else |
134 |
> |
return d * r; |
135 |
> |
} |
136 |
> |
|
137 |
> |
/** |
138 |
> |
* Converts the given time duration in the given unit to this unit. |
139 |
> |
* Conversions from finer to coarser granularities truncate, so |
140 |
> |
* lose precision. For example, converting {@code 999} milliseconds |
141 |
> |
* to seconds results in {@code 0}. Conversions from coarser to |
142 |
> |
* finer granularities with arguments that would numerically |
143 |
> |
* overflow saturate to {@code Long.MIN_VALUE} if negative or |
144 |
> |
* {@code Long.MAX_VALUE} if positive. |
145 |
> |
* |
146 |
> |
* <p>For example, to convert 10 minutes to milliseconds, use: |
147 |
> |
* {@code TimeUnit.MILLISECONDS.convert(10L, TimeUnit.MINUTES)} |
148 |
> |
* |
149 |
> |
* @param sourceDuration the time duration in the given {@code sourceUnit} |
150 |
> |
* @param sourceUnit the unit of the {@code sourceDuration} argument |
151 |
|
* @return the converted duration in this unit, |
152 |
< |
* or <tt>Long.MIN_VALUE</tt> if conversion would negatively |
153 |
< |
* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow. |
152 |
> |
* or {@code Long.MIN_VALUE} if conversion would negatively overflow, |
153 |
> |
* or {@code Long.MAX_VALUE} if it would positively overflow. |
154 |
|
*/ |
155 |
< |
public abstract long convert(long duration, TimeUnit unit); |
155 |
> |
public long convert(long sourceDuration, TimeUnit sourceUnit) { |
156 |
> |
switch (this) { |
157 |
> |
case NANOSECONDS: return sourceUnit.toNanos(sourceDuration); |
158 |
> |
case MICROSECONDS: return sourceUnit.toMicros(sourceDuration); |
159 |
> |
case MILLISECONDS: return sourceUnit.toMillis(sourceDuration); |
160 |
> |
case SECONDS: return sourceUnit.toSeconds(sourceDuration); |
161 |
> |
default: return cvt(sourceDuration, scale, sourceUnit.scale); |
162 |
> |
} |
163 |
> |
} |
164 |
|
|
165 |
|
/** |
166 |
< |
* Equivalent to <tt>NANOSECONDS.convert(duration, this)</tt>. |
166 |
> |
* Equivalent to |
167 |
> |
* {@link #convert(long, TimeUnit) NANOSECONDS.convert(duration, this)}. |
168 |
|
* @param duration the duration |
169 |
|
* @return the converted duration, |
170 |
< |
* or <tt>Long.MIN_VALUE</tt> if conversion would negatively |
171 |
< |
* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow. |
178 |
< |
* @see #convert |
170 |
> |
* or {@code Long.MIN_VALUE} if conversion would negatively overflow, |
171 |
> |
* or {@code Long.MAX_VALUE} if it would positively overflow. |
172 |
|
*/ |
173 |
< |
public abstract long toNanos(long duration); |
173 |
> |
public long toNanos(long duration) { |
174 |
> |
long s, m; |
175 |
> |
if ((s = scale) == NANO_SCALE) |
176 |
> |
return duration; |
177 |
> |
else if (duration > (m = maxNanos)) |
178 |
> |
return Long.MAX_VALUE; |
179 |
> |
else if (duration < -m) |
180 |
> |
return Long.MIN_VALUE; |
181 |
> |
else |
182 |
> |
return duration * s; |
183 |
> |
} |
184 |
|
|
185 |
|
/** |
186 |
< |
* Equivalent to <tt>MICROSECONDS.convert(duration, this)</tt>. |
186 |
> |
* Equivalent to |
187 |
> |
* {@link #convert(long, TimeUnit) MICROSECONDS.convert(duration, this)}. |
188 |
|
* @param duration the duration |
189 |
|
* @return the converted duration, |
190 |
< |
* or <tt>Long.MIN_VALUE</tt> if conversion would negatively |
191 |
< |
* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow. |
188 |
< |
* @see #convert |
190 |
> |
* or {@code Long.MIN_VALUE} if conversion would negatively overflow, |
191 |
> |
* or {@code Long.MAX_VALUE} if it would positively overflow. |
192 |
|
*/ |
193 |
< |
public abstract long toMicros(long duration); |
193 |
> |
public long toMicros(long duration) { |
194 |
> |
long s, m; |
195 |
> |
if ((s = scale) == MICRO_SCALE) |
196 |
> |
return duration; |
197 |
> |
else if (s < MICRO_SCALE) |
198 |
> |
return duration / microRatio; |
199 |
> |
else if (duration > (m = maxMicros)) |
200 |
> |
return Long.MAX_VALUE; |
201 |
> |
else if (duration < -m) |
202 |
> |
return Long.MIN_VALUE; |
203 |
> |
else |
204 |
> |
return duration * microRatio; |
205 |
> |
} |
206 |
|
|
207 |
|
/** |
208 |
< |
* Equivalent to <tt>MILLISECONDS.convert(duration, this)</tt>. |
208 |
> |
* Equivalent to |
209 |
> |
* {@link #convert(long, TimeUnit) MILLISECONDS.convert(duration, this)}. |
210 |
|
* @param duration the duration |
211 |
|
* @return the converted duration, |
212 |
< |
* or <tt>Long.MIN_VALUE</tt> if conversion would negatively |
213 |
< |
* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow. |
198 |
< |
* @see #convert |
212 |
> |
* or {@code Long.MIN_VALUE} if conversion would negatively overflow, |
213 |
> |
* or {@code Long.MAX_VALUE} if it would positively overflow. |
214 |
|
*/ |
215 |
< |
public abstract long toMillis(long duration); |
215 |
> |
public long toMillis(long duration) { |
216 |
> |
long s, m; |
217 |
> |
if ((s = scale) == MILLI_SCALE) |
218 |
> |
return duration; |
219 |
> |
else if (s < MILLI_SCALE) |
220 |
> |
return duration / milliRatio; |
221 |
> |
else if (duration > (m = maxMillis)) |
222 |
> |
return Long.MAX_VALUE; |
223 |
> |
else if (duration < -m) |
224 |
> |
return Long.MIN_VALUE; |
225 |
> |
else |
226 |
> |
return duration * milliRatio; |
227 |
> |
} |
228 |
|
|
229 |
|
/** |
230 |
< |
* Equivalent to <tt>SECONDS.convert(duration, this)</tt>. |
230 |
> |
* Equivalent to |
231 |
> |
* {@link #convert(long, TimeUnit) SECONDS.convert(duration, this)}. |
232 |
|
* @param duration the duration |
233 |
|
* @return the converted duration, |
234 |
< |
* or <tt>Long.MIN_VALUE</tt> if conversion would negatively |
235 |
< |
* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow. |
208 |
< |
* @see #convert |
234 |
> |
* or {@code Long.MIN_VALUE} if conversion would negatively overflow, |
235 |
> |
* or {@code Long.MAX_VALUE} if it would positively overflow. |
236 |
|
*/ |
237 |
< |
public abstract long toSeconds(long duration); |
237 |
> |
public long toSeconds(long duration) { |
238 |
> |
long s, m; |
239 |
> |
if ((s = scale) == SECOND_SCALE) |
240 |
> |
return duration; |
241 |
> |
else if (s < SECOND_SCALE) |
242 |
> |
return duration / secRatio; |
243 |
> |
else if (duration > (m = maxSecs)) |
244 |
> |
return Long.MAX_VALUE; |
245 |
> |
else if (duration < -m) |
246 |
> |
return Long.MIN_VALUE; |
247 |
> |
else |
248 |
> |
return duration * secRatio; |
249 |
> |
} |
250 |
|
|
251 |
|
/** |
252 |
< |
* Equivalent to <tt>MINUTES.convert(duration, this)</tt>. |
252 |
> |
* Equivalent to |
253 |
> |
* {@link #convert(long, TimeUnit) MINUTES.convert(duration, this)}. |
254 |
|
* @param duration the duration |
255 |
|
* @return the converted duration, |
256 |
< |
* or <tt>Long.MIN_VALUE</tt> if conversion would negatively |
257 |
< |
* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow. |
258 |
< |
* @see #convert |
256 |
> |
* or {@code Long.MIN_VALUE} if conversion would negatively overflow, |
257 |
> |
* or {@code Long.MAX_VALUE} if it would positively overflow. |
258 |
> |
* @since 1.6 |
259 |
|
*/ |
260 |
< |
public abstract long toMinutes(long duration); |
260 |
> |
public long toMinutes(long duration) { |
261 |
> |
return cvt(duration, MINUTE_SCALE, scale); |
262 |
> |
} |
263 |
|
|
264 |
|
/** |
265 |
< |
* Equivalent to <tt>HOURS.convert(duration, this)</tt>. |
265 |
> |
* Equivalent to |
266 |
> |
* {@link #convert(long, TimeUnit) HOURS.convert(duration, this)}. |
267 |
|
* @param duration the duration |
268 |
|
* @return the converted duration, |
269 |
< |
* or <tt>Long.MIN_VALUE</tt> if conversion would negatively |
270 |
< |
* overflow, or <tt>Long.MAX_VALUE</tt> if it would positively overflow. |
271 |
< |
* @see #convert |
269 |
> |
* or {@code Long.MIN_VALUE} if conversion would negatively overflow, |
270 |
> |
* or {@code Long.MAX_VALUE} if it would positively overflow. |
271 |
> |
* @since 1.6 |
272 |
|
*/ |
273 |
< |
public abstract long toHours(long duration); |
273 |
> |
public long toHours(long duration) { |
274 |
> |
return cvt(duration, HOUR_SCALE, scale); |
275 |
> |
} |
276 |
|
|
277 |
|
/** |
278 |
< |
* Equivalent to <tt>DAYS.convert(duration, this)</tt>. |
278 |
> |
* Equivalent to |
279 |
> |
* {@link #convert(long, TimeUnit) DAYS.convert(duration, this)}. |
280 |
|
* @param duration the duration |
281 |
|
* @return the converted duration |
282 |
< |
* @see #convert |
282 |
> |
* @since 1.6 |
283 |
|
*/ |
284 |
< |
public abstract long toDays(long duration); |
284 |
> |
public long toDays(long duration) { |
285 |
> |
return cvt(duration, DAY_SCALE, scale); |
286 |
> |
} |
287 |
|
|
288 |
|
/** |
289 |
|
* Utility to compute the excess-nanosecond argument to wait, |
292 |
|
* @param m the number of milliseconds |
293 |
|
* @return the number of nanoseconds |
294 |
|
*/ |
295 |
< |
abstract int excessNanos(long d, long m); |
295 |
> |
private int excessNanos(long d, long m) { |
296 |
> |
long s; |
297 |
> |
if ((s = scale) == NANO_SCALE) |
298 |
> |
return (int)(d - (m * MILLI_SCALE)); |
299 |
> |
else if (s == MICRO_SCALE) |
300 |
> |
return (int)((d * 1000L) - (m * MILLI_SCALE)); |
301 |
> |
else |
302 |
> |
return 0; |
303 |
> |
} |
304 |
|
|
305 |
|
/** |
306 |
< |
* Performs a timed <tt>Object.wait</tt> using this time unit. |
306 |
> |
* Performs a timed {@link Object#wait(long, int) Object.wait} |
307 |
> |
* using this time unit. |
308 |
|
* This is a convenience method that converts timeout arguments |
309 |
< |
* into the form required by the <tt>Object.wait</tt> method. |
309 |
> |
* into the form required by the {@code Object.wait} method. |
310 |
|
* |
311 |
< |
* <p>For example, you could implement a blocking <tt>poll</tt> |
312 |
< |
* method (see {@link BlockingQueue#poll BlockingQueue.poll}) |
311 |
> |
* <p>For example, you could implement a blocking {@code poll} method |
312 |
> |
* (see {@link BlockingQueue#poll(long, TimeUnit) BlockingQueue.poll}) |
313 |
|
* using: |
314 |
|
* |
315 |
< |
* <pre> public synchronized Object poll(long timeout, TimeUnit unit) throws InterruptedException { |
316 |
< |
* while (empty) { |
317 |
< |
* unit.timedWait(this, timeout); |
318 |
< |
* ... |
319 |
< |
* } |
320 |
< |
* }</pre> |
315 |
> |
* <pre> {@code |
316 |
> |
* public synchronized Object poll(long timeout, TimeUnit unit) |
317 |
> |
* throws InterruptedException { |
318 |
> |
* while (empty) { |
319 |
> |
* unit.timedWait(this, timeout); |
320 |
> |
* ... |
321 |
> |
* } |
322 |
> |
* }}</pre> |
323 |
|
* |
324 |
|
* @param obj the object to wait on |
325 |
|
* @param timeout the maximum time to wait. If less than |
326 |
|
* or equal to zero, do not wait at all. |
327 |
< |
* @throws InterruptedException if interrupted while waiting. |
269 |
< |
* @see Object#wait(long, int) |
327 |
> |
* @throws InterruptedException if interrupted while waiting |
328 |
|
*/ |
329 |
|
public void timedWait(Object obj, long timeout) |
330 |
< |
throws InterruptedException { |
330 |
> |
throws InterruptedException { |
331 |
|
if (timeout > 0) { |
332 |
|
long ms = toMillis(timeout); |
333 |
|
int ns = excessNanos(timeout, ms); |
336 |
|
} |
337 |
|
|
338 |
|
/** |
339 |
< |
* Performs a timed <tt>Thread.join</tt> using this time unit. |
339 |
> |
* Performs a timed {@link Thread#join(long, int) Thread.join} |
340 |
> |
* using this time unit. |
341 |
|
* This is a convenience method that converts time arguments into the |
342 |
< |
* form required by the <tt>Thread.join</tt> method. |
342 |
> |
* form required by the {@code Thread.join} method. |
343 |
> |
* |
344 |
|
* @param thread the thread to wait for |
345 |
|
* @param timeout the maximum time to wait. If less than |
346 |
|
* or equal to zero, do not wait at all. |
347 |
< |
* @throws InterruptedException if interrupted while waiting. |
288 |
< |
* @see Thread#join(long, int) |
347 |
> |
* @throws InterruptedException if interrupted while waiting |
348 |
|
*/ |
349 |
|
public void timedJoin(Thread thread, long timeout) |
350 |
< |
throws InterruptedException { |
350 |
> |
throws InterruptedException { |
351 |
|
if (timeout > 0) { |
352 |
|
long ms = toMillis(timeout); |
353 |
|
int ns = excessNanos(timeout, ms); |
356 |
|
} |
357 |
|
|
358 |
|
/** |
359 |
< |
* Performs a <tt>Thread.sleep</tt> using this unit. |
359 |
> |
* Performs a {@link Thread#sleep(long, int) Thread.sleep} using |
360 |
> |
* this time unit. |
361 |
|
* This is a convenience method that converts time arguments into the |
362 |
< |
* form required by the <tt>Thread.sleep</tt> method. |
362 |
> |
* form required by the {@code Thread.sleep} method. |
363 |
> |
* |
364 |
|
* @param timeout the minimum time to sleep. If less than |
365 |
|
* or equal to zero, do not sleep at all. |
366 |
< |
* @throws InterruptedException if interrupted while sleeping. |
306 |
< |
* @see Thread#sleep |
366 |
> |
* @throws InterruptedException if interrupted while sleeping |
367 |
|
*/ |
368 |
|
public void sleep(long timeout) throws InterruptedException { |
369 |
|
if (timeout > 0) { |
373 |
|
} |
374 |
|
} |
375 |
|
|
376 |
+ |
/** |
377 |
+ |
* Converts this {@code TimeUnit} to the equivalent {@code ChronoUnit}. |
378 |
+ |
* |
379 |
+ |
* @return the converted equivalent ChronoUnit |
380 |
+ |
* @since 9 |
381 |
+ |
*/ |
382 |
+ |
public ChronoUnit toChronoUnit() { |
383 |
+ |
switch (this) { |
384 |
+ |
case NANOSECONDS: return ChronoUnit.NANOS; |
385 |
+ |
case MICROSECONDS: return ChronoUnit.MICROS; |
386 |
+ |
case MILLISECONDS: return ChronoUnit.MILLIS; |
387 |
+ |
case SECONDS: return ChronoUnit.SECONDS; |
388 |
+ |
case MINUTES: return ChronoUnit.MINUTES; |
389 |
+ |
case HOURS: return ChronoUnit.HOURS; |
390 |
+ |
case DAYS: return ChronoUnit.DAYS; |
391 |
+ |
default: throw new AssertionError(); |
392 |
+ |
} |
393 |
+ |
} |
394 |
+ |
|
395 |
+ |
/** |
396 |
+ |
* Converts a {@code ChronoUnit} to the equivalent {@code TimeUnit}. |
397 |
+ |
* |
398 |
+ |
* @param chronoUnit the ChronoUnit to convert |
399 |
+ |
* @return the converted equivalent TimeUnit |
400 |
+ |
* @throws IllegalArgumentException if {@code chronoUnit} has no |
401 |
+ |
* equivalent TimeUnit |
402 |
+ |
* @throws NullPointerException if {@code chronoUnit} is null |
403 |
+ |
* @since 9 |
404 |
+ |
*/ |
405 |
+ |
public static TimeUnit of(ChronoUnit chronoUnit) { |
406 |
+ |
switch (Objects.requireNonNull(chronoUnit, "chronoUnit")) { |
407 |
+ |
case NANOS: return TimeUnit.NANOSECONDS; |
408 |
+ |
case MICROS: return TimeUnit.MICROSECONDS; |
409 |
+ |
case MILLIS: return TimeUnit.MILLISECONDS; |
410 |
+ |
case SECONDS: return TimeUnit.SECONDS; |
411 |
+ |
case MINUTES: return TimeUnit.MINUTES; |
412 |
+ |
case HOURS: return TimeUnit.HOURS; |
413 |
+ |
case DAYS: return TimeUnit.DAYS; |
414 |
+ |
default: |
415 |
+ |
throw new IllegalArgumentException( |
416 |
+ |
"No TimeUnit equivalent for " + chronoUnit); |
417 |
+ |
} |
418 |
+ |
} |
419 |
+ |
|
420 |
|
} |