/*
* 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.entity.mimic;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;
import org.optaplanner.core.impl.domain.entity.descriptor.EntityDescriptor;
import org.optaplanner.core.impl.heuristic.selector.common.iterator.SelectionIterator;
import org.optaplanner.core.impl.heuristic.selector.common.iterator.SelectionListIterator;
import org.optaplanner.core.impl.heuristic.selector.entity.AbstractEntitySelector;
import org.optaplanner.core.impl.heuristic.selector.entity.EntitySelector;
public class MimicRecordingEntitySelector extends AbstractEntitySelector implements EntityMimicRecorder {
protected final EntitySelector childEntitySelector;
protected final List<MimicReplayingEntitySelector> replayingEntitySelectorList;
public MimicRecordingEntitySelector(EntitySelector childEntitySelector) {
this.childEntitySelector = childEntitySelector;
phaseLifecycleSupport.addEventListener(childEntitySelector);
replayingEntitySelectorList = new ArrayList<>();
}
@Override
public void addMimicReplayingEntitySelector(MimicReplayingEntitySelector replayingEntitySelector) {
replayingEntitySelectorList.add(replayingEntitySelector);
}
// ************************************************************************
// Worker methods
// ************************************************************************
@Override
public EntityDescriptor getEntityDescriptor() {
return childEntitySelector.getEntityDescriptor();
}
@Override
public boolean isCountable() {
return childEntitySelector.isCountable();
}
@Override
public boolean isNeverEnding() {
return childEntitySelector.isNeverEnding();
}
@Override
public long getSize() {
return childEntitySelector.getSize();
}
@Override
public Iterator<Object> iterator() {
return new RecordingEntityIterator(childEntitySelector.iterator());
}
private class RecordingEntityIterator extends SelectionIterator<Object> {
private final Iterator<Object> childEntityIterator;
public RecordingEntityIterator(Iterator<Object> childEntityIterator) {
this.childEntityIterator = childEntityIterator;
}
@Override
public boolean hasNext() {
boolean hasNext = childEntityIterator.hasNext();
for (MimicReplayingEntitySelector replayingEntitySelector : replayingEntitySelectorList) {
replayingEntitySelector.recordedHasNext(hasNext);
}
return hasNext;
}
@Override
public Object next() {
Object next = childEntityIterator.next();
for (MimicReplayingEntitySelector replayingEntitySelector : replayingEntitySelectorList) {
replayingEntitySelector.recordedNext(next);
}
return next;
}
}
@Override
public Iterator<Object> endingIterator() {
// No recording, because the endingIterator() is used for determining size
return childEntitySelector.endingIterator();
}
@Override
public ListIterator<Object> listIterator() {
return new RecordingEntityListIterator(childEntitySelector.listIterator());
}
@Override
public ListIterator<Object> listIterator(int index) {
return new RecordingEntityListIterator(childEntitySelector.listIterator(index));
}
private class RecordingEntityListIterator extends SelectionListIterator<Object> {
private final ListIterator<Object> childEntityIterator;
public RecordingEntityListIterator(ListIterator<Object> childEntityIterator) {
this.childEntityIterator = childEntityIterator;
}
@Override
public boolean hasNext() {
boolean hasNext = childEntityIterator.hasNext();
for (MimicReplayingEntitySelector replayingEntitySelector : replayingEntitySelectorList) {
replayingEntitySelector.recordedHasNext(hasNext);
}
return hasNext;
}
@Override
public Object next() {
Object next = childEntityIterator.next();
for (MimicReplayingEntitySelector replayingEntitySelector : replayingEntitySelectorList) {
replayingEntitySelector.recordedNext(next);
}
return next;
}
@Override
public boolean hasPrevious() {
boolean hasPrevious = childEntityIterator.hasPrevious();
for (MimicReplayingEntitySelector replayingEntitySelector : replayingEntitySelectorList) {
// The replay only cares that the recording changed, not in which direction
replayingEntitySelector.recordedHasNext(hasPrevious);
}
return hasPrevious;
}
@Override
public Object previous() {
Object previous = childEntityIterator.previous();
for (MimicReplayingEntitySelector replayingEntitySelector : replayingEntitySelectorList) {
// The replay only cares that the recording changed, not in which direction
replayingEntitySelector.recordedNext(previous);
}
return previous;
}
@Override
public int nextIndex() {
return childEntityIterator.nextIndex();
}
@Override
public int previousIndex() {
return childEntityIterator.previousIndex();
}
}
@Override
public String toString() {
return "Recording(" + childEntitySelector + ")";
}
}