/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* 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.keycloak.common.util;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
/**
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 1 $
*/
@SuppressWarnings("serial")
public class ConcurrentMultivaluedHashMap<K, V> extends ConcurrentHashMap<K, List<V>>
{
public void putSingle(K key, V value)
{
List<V> list = new CopyOnWriteArrayList<>();
list.add(value);
put(key, list);
}
public void addAll(K key, V... newValues)
{
for (V value : newValues)
{
add(key, value);
}
}
public void addAll(K key, List<V> valueList)
{
for (V value : valueList)
{
add(key, value);
}
}
public void addFirst(K key, V value)
{
List<V> list = get(key);
if (list == null)
{
add(key, value);
}
else
{
list.add(0, value);
}
}
public final void add(K key, V value)
{
getList(key).add(value);
}
public final void addMultiple(K key, Collection<V> values)
{
getList(key).addAll(values);
}
public V getFirst(K key)
{
List<V> list = get(key);
return list == null ? null : list.get(0);
}
public final List<V> getList(K key)
{
List<V> list = get(key);
if (list == null)
put(key, list = new CopyOnWriteArrayList<V>());
return list;
}
public void addAll(ConcurrentMultivaluedHashMap<K, V> other)
{
for (Entry<K, List<V>> entry : other.entrySet())
{
getList(entry.getKey()).addAll(entry.getValue());
}
}
}