86 lines
2.3 KiB
Java
86 lines
2.3 KiB
Java
// com/mindviewinc/util/CountingSupplier.java
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// Simple generator implementations.
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package com.mindviewinc.util;
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import java.util.function.*;
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public class CountingSupplier {
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public static class
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Boolean implements Supplier<java.lang.Boolean> {
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private boolean value = false;
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@Override
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public java.lang.Boolean get() {
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value = !value; // Just flips back and forth
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return value;
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}
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}
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public static class
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Byte implements Supplier<java.lang.Byte> {
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private byte value = 0;
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@Override
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public java.lang.Byte get() { return value++; }
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}
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static char[] chars = ("abcdefghijklmnopqrstuvwxyz" +
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ").toCharArray();
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public static class
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Character implements Supplier<java.lang.Character> {
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int index = -1;
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@Override
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public java.lang.Character get() {
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index = (index + 1) % chars.length;
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return chars[index];
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}
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}
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public static class
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String implements Supplier<java.lang.String> {
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private int length = 7;
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Supplier<java.lang.Character> cg = new Character();
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public String() {}
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public String(int length) { this.length = length; }
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@Override
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public java.lang.String get() {
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char[] buf = new char[length];
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for(int i = 0; i < length; i++)
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buf[i] = cg.get();
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return new java.lang.String(buf);
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}
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}
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public static class
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Short implements Supplier<java.lang.Short> {
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private short value = 0;
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@Override
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public java.lang.Short get() { return value++; }
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}
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public static class
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Integer implements Supplier<java.lang.Integer> {
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private int value = 0;
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@Override
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public java.lang.Integer get() { return value++; }
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}
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public static class
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Long implements Supplier<java.lang.Long> {
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private long value = 0;
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@Override
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public java.lang.Long get() { return value++; }
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}
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public static class
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Float implements Supplier<java.lang.Float> {
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private float value = 0;
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@Override
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public java.lang.Float get() {
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float result = value;
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value += 1.0;
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return result;
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}
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}
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public static class
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Double implements Supplier<java.lang.Double> {
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private double value = 0.0;
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@Override
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public java.lang.Double get() {
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double result = value;
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value += 1.0;
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return result;
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}
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}
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}
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