/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.optaplanner.core.impl.domain.valuerange.buildin.primboolean;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Random;
import org.optaplanner.core.impl.domain.valuerange.AbstractCountableValueRange;
import org.optaplanner.core.impl.domain.valuerange.util.ValueRangeIterator;
public class BooleanValueRange extends AbstractCountableValueRange<Boolean> {
public BooleanValueRange() {}
@Override
public long getSize() {
return 2L;
}
@Override
public boolean contains(Boolean value) {
if (value == null) {
return false;
}
return true;
}
@Override
public Boolean get(long index) {
if (index < 0L || index >= 2L) {
throw new IndexOutOfBoundsException("The index (" + index + ") must be >= 0 and < 2.");
}
return index == 0L ? Boolean.FALSE : Boolean.TRUE;
}
@Override
public Iterator<Boolean> createOriginalIterator() {
return new OriginalBooleanValueRangeIterator();
}
private class OriginalBooleanValueRangeIterator extends ValueRangeIterator<Boolean> {
private boolean hasNext = true;
private Boolean upcoming = Boolean.FALSE;
@Override
public boolean hasNext() {
return hasNext;
}
@Override
public Boolean next() {
if (!hasNext) {
throw new NoSuchElementException();
}
Boolean next = upcoming;
if (upcoming) {
hasNext = false;
} else {
upcoming = Boolean.TRUE;
}
return next;
}
}
@Override
public Iterator<Boolean> createRandomIterator(Random workingRandom) {
return new RandomBooleanValueRangeIterator(workingRandom);
}
private class RandomBooleanValueRangeIterator extends ValueRangeIterator<Boolean> {
private final Random workingRandom;
public RandomBooleanValueRangeIterator(Random workingRandom) {
this.workingRandom = workingRandom;
}
@Override
public boolean hasNext() {
return true;
}
@Override
public Boolean next() {
return Boolean.valueOf(workingRandom.nextBoolean());
}
}
@Override
public String toString() {
return "[false, true]"; // Formatting: interval (mathematics) ISO 31-11
}
}