org.jclouds.ohai.functions.MapSetToMultimap.java Source code

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Here is the source code for org.jclouds.ohai.functions.MapSetToMultimap.java

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/*
 * 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.jclouds.ohai.functions;

import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;

import javax.inject.Singleton;

import com.google.common.base.Function;
import com.google.common.collect.LinkedHashMultimap;
import com.google.common.collect.Multimap;

@Singleton
public class MapSetToMultimap<K, V> implements Function<Map<K, Set<V>>, Multimap<K, V>> {

    @Override
    public Multimap<K, V> apply(Map<K, Set<V>> from) {
        Multimap<K, V> returnV = LinkedHashMultimap.create();
        for (Entry<K, Set<V>> entry : from.entrySet()) {
            for (V value : entry.getValue())
                returnV.put(entry.getKey(), value);
        }
        return returnV;
    }

}