/*
* Copyright 2015 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.heuristic.selector.value.mimic;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.optaplanner.core.impl.domain.variable.descriptor.GenuineVariableDescriptor;
import org.optaplanner.core.impl.heuristic.selector.common.iterator.SelectionIterator;
import org.optaplanner.core.impl.heuristic.selector.value.AbstractValueSelector;
import org.optaplanner.core.impl.heuristic.selector.value.EntityIndependentValueSelector;
public class MimicRecordingValueSelector extends AbstractValueSelector
implements ValueMimicRecorder, EntityIndependentValueSelector {
protected final EntityIndependentValueSelector childValueSelector;
protected final List<MimicReplayingValueSelector> replayingValueSelectorList;
public MimicRecordingValueSelector(EntityIndependentValueSelector childValueSelector) {
this.childValueSelector = childValueSelector;
phaseLifecycleSupport.addEventListener(childValueSelector);
replayingValueSelectorList = new ArrayList<>();
}
@Override
public void addMimicReplayingValueSelector(MimicReplayingValueSelector replayingEntitySelector) {
replayingValueSelectorList.add(replayingEntitySelector);
}
// ************************************************************************
// Worker methods
// ************************************************************************
@Override
public GenuineVariableDescriptor getVariableDescriptor() {
return childValueSelector.getVariableDescriptor();
}
@Override
public boolean isCountable() {
return childValueSelector.isCountable();
}
@Override
public boolean isNeverEnding() {
return childValueSelector.isNeverEnding();
}
@Override
public long getSize(Object entity) {
return childValueSelector.getSize(entity);
}
@Override
public long getSize() {
return childValueSelector.getSize();
}
@Override
public Iterator<Object> iterator(Object entity) {
return new RecordingValueIterator(childValueSelector.iterator(entity));
}
@Override
public Iterator<Object> iterator() {
return new RecordingValueIterator(childValueSelector.iterator());
}
private class RecordingValueIterator extends SelectionIterator<Object> {
private final Iterator<Object> childValueIterator;
public RecordingValueIterator(Iterator<Object> childValueIterator) {
this.childValueIterator = childValueIterator;
}
@Override
public boolean hasNext() {
boolean hasNext = childValueIterator.hasNext();
for (MimicReplayingValueSelector replayingValueSelector : replayingValueSelectorList) {
replayingValueSelector.recordedHasNext(hasNext);
}
return hasNext;
}
@Override
public Object next() {
Object next = childValueIterator.next();
for (MimicReplayingValueSelector replayingValueSelector : replayingValueSelectorList) {
replayingValueSelector.recordedNext(next);
}
return next;
}
}
@Override
public Iterator<Object> endingIterator(Object entity) {
// No recording, because the endingIterator() is used for determining size
return childValueSelector.endingIterator(entity);
}
@Override
public String toString() {
return "Recording(" + childValueSelector + ")";
}
}