/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you 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.apache.uima.cas.impl; | |
import java.util.Comparator; | |
import java.util.NoSuchElementException; | |
import java.util.concurrent.atomic.AtomicInteger; | |
import org.apache.uima.UIMAFramework; | |
import org.apache.uima.cas.FeatureStructure; | |
import org.apache.uima.internal.util.CopyOnWriteObjHashSet; | |
import org.apache.uima.internal.util.Misc; | |
import org.apache.uima.jcas.cas.TOP; | |
class FsIterator_bag<T extends FeatureStructure> extends FsIterator_singletype<T> { | |
private static final AtomicInteger moveToCount = new AtomicInteger(0); | |
protected CopyOnWriteObjHashSet<TOP> bag; | |
final protected FsIndex_bag<T> fsBagIndex; // just an optimization, is == to fsLeafIndexImpl from super class, allows dispatch w/o casting | |
private int position = -1; | |
private boolean isGoingForward = true; | |
FsIterator_bag(FsIndex_bag<T> fsBagIndex, TypeImpl ti, CopyOnWriteIndexPart cow_wrapper) { | |
super(ti); | |
this.fsBagIndex = fsBagIndex; // need for copy() | |
bag = (CopyOnWriteObjHashSet<TOP>) cow_wrapper; | |
moveToFirst(); | |
} | |
public boolean maybeReinitIterator() { | |
if (!bag.isOriginal()) { | |
bag = (CopyOnWriteObjHashSet<TOP>) fsBagIndex.getNonNullCow(); | |
return true; | |
} | |
return false; | |
} | |
/* (non-Javadoc) | |
* @see org.apache.uima.cas.FSIterator#isValid() | |
*/ | |
@Override | |
public boolean isValid() { | |
return (position >= 0) && (position < bag.getCapacity()); | |
} | |
@Override | |
public T getNvc() { | |
// checkConcurrentModification(); | |
return (T) bag.get(position); | |
} | |
/* (non-Javadoc) | |
* @see org.apache.uima.cas.FSIterator#moveToFirst() | |
*/ | |
@Override | |
public void moveToFirstNoReinit() { | |
// resetConcurrentModification(); | |
isGoingForward = true; | |
position = (bag.size() == 0) ? -1 : bag.moveToNextFilled(0); | |
} | |
/* (non-Javadoc) | |
* @see org.apache.uima.cas.FSIterator#moveToLast() | |
* If empty, make position -1 (invalid) | |
*/ | |
@Override | |
public void moveToLastNoReinit() { | |
// resetConcurrentModification(); | |
isGoingForward = false; | |
position = (bag.size() == 0) ? -1 : bag.moveToPreviousFilled(bag.getCapacity() -1); | |
} | |
@Override | |
public void moveToNextNvc() { | |
// checkConcurrentModification(); | |
isGoingForward = true; | |
position = bag.moveToNextFilled(++position); | |
} | |
@Override | |
public void moveToPreviousNvc() { | |
// checkConcurrentModification(); | |
isGoingForward = false; | |
position = bag.moveToPreviousFilled(--position); | |
} | |
/* (non-Javadoc) | |
* @see org.apache.uima.cas.FSIterator#moveTo(org.apache.uima.cas.FeatureStructure) | |
*/ | |
@Override | |
public void moveToNoReinit(FeatureStructure fs) { | |
// throw new UnsupportedOperationException("MoveTo operations for unordered iterators is not supported"); | |
Misc.decreasingWithTrace(moveToCount, "MoveTo operations on iterators over Bag indexes are likely mistakes." , UIMAFramework.getLogger()); | |
// resetConcurrentModification(); | |
// for backwards compatibility | |
position = bag.moveTo(fs); | |
if (position >= 0) { | |
if (getNvc() == null) { | |
position = -1; // mark invalid | |
} | |
} | |
} | |
// public void moveToExactNoReinit(FeatureStructure fs) { | |
// position = bag.moveTo(fs); | |
// } | |
/* (non-Javadoc) | |
* @see org.apache.uima.cas.FSIterator#copy() | |
*/ | |
@Override | |
public FsIterator_bag<T> copy() { | |
FsIterator_bag<T> copy = new FsIterator_bag<T>(this.fsBagIndex, this.ti, bag); | |
copyCommonSetup(copy); | |
return copy; | |
} | |
protected void copyCommonSetup(FsIterator_bag<T> copy) { | |
copy.position = position; | |
copy.isGoingForward = isGoingForward; | |
} | |
/* (non-Javadoc) | |
* @see org.apache.uima.cas.impl.LowLevelIterator#ll_indexSize() | |
*/ | |
@Override | |
public int ll_indexSizeMaybeNotCurrent() { | |
return bag.size(); | |
} | |
@Override | |
public int ll_maxAnnotSpan() { | |
return Integer.MAX_VALUE; | |
} | |
/* (non-Javadoc) | |
* @see org.apache.uima.cas.impl.LowLevelIterator#ll_getIndex() | |
*/ | |
@Override | |
public LowLevelIndex<T> ll_getIndex() { | |
return fsBagIndex; | |
} | |
// /* (non-Javadoc) | |
// * @see org.apache.uima.cas.impl.FsIterator_singletype#getModificationCountFromIndex() | |
// */ | |
// @Override | |
// protected int getModificationCountFromIndex() { | |
// return bag.getModificationCount(); | |
// } | |
/* (non-Javadoc) | |
* @see org.apache.uima.cas.impl.LowLevelIterator#isIndexesHaveBeenUpdated() | |
*/ | |
@Override | |
public boolean isIndexesHaveBeenUpdated() { | |
return bag != fsBagIndex.getCopyOnWriteIndexPart(); | |
} | |
@Override | |
public Comparator<TOP> getComparator() { | |
return null; // not used for bag | |
} | |
} | |