| /* |
| * Copyright (C) 2013 The Guava Authors |
| * |
| * 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 com.google.common.collect; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import com.google.common.annotations.GwtCompatible; |
| import com.google.common.base.Objects; |
| import com.google.common.base.Predicate; |
| import com.google.common.base.Predicates; |
| |
| import java.util.AbstractCollection; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * Implementation for {@link FilteredMultimap#values()}. |
| * |
| * @author Louis Wasserman |
| */ |
| @GwtCompatible |
| final class FilteredMultimapValues<K, V> extends AbstractCollection<V> { |
| private final FilteredMultimap<K, V> multimap; |
| |
| FilteredMultimapValues(FilteredMultimap<K, V> multimap) { |
| this.multimap = checkNotNull(multimap); |
| } |
| |
| @Override |
| public Iterator<V> iterator() { |
| return Maps.valueIterator(multimap.entries().iterator()); |
| } |
| |
| @Override |
| public boolean contains(@Nullable Object o) { |
| return multimap.containsValue(o); |
| } |
| |
| @Override |
| public int size() { |
| return multimap.size(); |
| } |
| |
| @Override |
| public boolean remove(@Nullable Object o) { |
| Predicate<? super Entry<K, V>> entryPredicate = multimap.entryPredicate(); |
| for (Iterator<Entry<K, V>> unfilteredItr = multimap.unfiltered().entries().iterator(); |
| unfilteredItr.hasNext();) { |
| Map.Entry<K, V> entry = unfilteredItr.next(); |
| if (entryPredicate.apply(entry) && Objects.equal(entry.getValue(), o)) { |
| unfilteredItr.remove(); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean removeAll(Collection<?> c) { |
| return Iterables.removeIf(multimap.unfiltered().entries(), |
| // explicit <Entry<K, V>> is required to build with JDK6 |
| Predicates.<Entry<K, V>>and(multimap.entryPredicate(), |
| Maps.<V>valuePredicateOnEntries(Predicates.in(c)))); |
| } |
| |
| @Override |
| public boolean retainAll(Collection<?> c) { |
| return Iterables.removeIf(multimap.unfiltered().entries(), |
| // explicit <Entry<K, V>> is required to build with JDK6 |
| Predicates.<Entry<K, V>>and(multimap.entryPredicate(), |
| Maps.<V>valuePredicateOnEntries(Predicates.not(Predicates.in(c))))); |
| } |
| |
| @Override |
| public void clear() { |
| multimap.clear(); |
| } |
| } |