com.phloc.commons.collections.multimap.MultiMapHelper Maven / Gradle / Ivy
/**
* Copyright (C) 2006-2015 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* 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.phloc.commons.collections.multimap;
import java.util.Collection;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.concurrent.Immutable;
/**
* Utility class implementing some common functionality con multi maps
*
* @author Philip Helger
*/
@Immutable
public final class MultiMapHelper
{
private MultiMapHelper ()
{}
@Nonnegative
public static long getTotalValueCount (@Nonnull final IMultiMap aMultiMap)
{
long ret = 0;
for (final Collection aChild : aMultiMap.values ())
ret += aChild.size ();
return ret;
}
}