/*
* (C) Copyright 2017 Pantheon Technologies, s.r.o. and others.
*
* 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.opendaylight.yangtools.triemap;
import static org.opendaylight.yangtools.triemap.ImmutableTrieMap.unsupported;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map.Entry;
/**
* {@link AbstractEntrySet} implementation guarding against attempts to mutate the underlying map.
*
* @author Robert Varga
*
* @param <K> the type of entry keys
* @param <V> the type of entry values
*/
final class ImmutableEntrySet<K, V> extends AbstractEntrySet<K, V> {
ImmutableEntrySet(final TrieMap<K, V> map) {
super(map);
}
@Override
public void clear() {
throw unsupported();
}
@Override
public Iterator<Entry<K, V>> iterator() {
return map().immutableIterator();
}
@Override
public boolean remove(final Object o) {
throw unsupported();
}
@Override
public boolean removeAll(final Collection<?> c) {
throw unsupported();
}
@Override
public boolean retainAll(final Collection<?> c) {
throw unsupported();
}
}