forked from Speiger/Primitive-Collections
51 lines
2.0 KiB
Java
51 lines
2.0 KiB
Java
package speiger.src.collections.utils;
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import java.util.concurrent.ForkJoinPool;
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import java.util.concurrent.ForkJoinTask;
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public class SanityChecks
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{
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public static final int MAX_ARRAY_SIZE = Integer.MAX_VALUE - 8;
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private static ForkJoinPool WORK_POOL = ForkJoinPool.commonPool();
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public static byte castToByte(int value) {
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if(value > Byte.MAX_VALUE || value < Byte.MIN_VALUE) throw new IllegalStateException("Value ["+value+"] out of Byte[-128,127] range");
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return (byte)value;
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}
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public static short castToShort(int value) {
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if(value > Short.MAX_VALUE || value < Short.MIN_VALUE) throw new IllegalStateException("Value ["+value+"] out of Short[-32768,32767] range");
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return (short)value;
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}
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public static char castToChar(int value) {
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if(value > Character.MAX_VALUE || value < Character.MIN_VALUE) throw new IllegalStateException("Value ["+value+"] out of Character[0,65535] range");
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return (char)value;
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}
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public static float castToFloat(double value) {
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if(Double.isNaN(value)) return Float.NaN;
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if(Double.isInfinite(value)) return value > 0 ? Float.POSITIVE_INFINITY : Float.NEGATIVE_INFINITY;
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if(value < -Float.MAX_VALUE || value > Float.MAX_VALUE) throw new IllegalStateException("Value ["+value+"] out of Float range");
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return (float)value;
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}
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public static void checkArrayCapacity(int arraySize, int offset, int accessSize) {
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if(offset < 0) throw new IllegalStateException("Offset is negative ("+offset+")");
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else if(accessSize < 0) throw new IllegalStateException("Size is negative ("+accessSize+")");
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else if(arraySize < offset + accessSize) throw new IndexOutOfBoundsException("Index (" + offset + accessSize + ") is not in size (" + arraySize + ")");
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}
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public static boolean canParallelTask() {
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return WORK_POOL.getParallelism() > 1;
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}
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public static <T> void invokeTask(ForkJoinTask<T> task) {
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WORK_POOL.invoke(task);
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}
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public static void setWorkPool(ForkJoinPool pool) {
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WORK_POOL = pool == null ? ForkJoinPool.commonPool() : pool;
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}
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}
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