| /* |
| * 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.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<T> 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<T> cow_wrapper) { |
| super(ti); |
| this.fsBagIndex = fsBagIndex; // need for copy() |
| bag = (CopyOnWriteObjHashSet<T>) cow_wrapper; |
| moveToFirst(); |
| } |
| |
| @Override |
| public boolean maybeReinitIterator() { |
| if (!bag.isOriginal()) { |
| bag = (CopyOnWriteObjHashSet<T>) 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<>(fsBagIndex, 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 |
| } |
| |
| @Override |
| public int size() { |
| return bag.size(); |
| } |
| |
| } |