cosmos.impl.KeyValueToMultimapQueryResult.java Source code

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Here is the source code for cosmos.impl.KeyValueToMultimapQueryResult.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.
 *
 *  Copyright 2013 Josh Elser
 *
 */
package cosmos.impl;

import java.io.IOException;
import java.util.Map.Entry;

import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Value;
import org.apache.hadoop.io.DataInputBuffer;

import com.google.common.base.Function;
import com.google.common.collect.Maps;

import cosmos.records.impl.MultimapRecord;

/**
 * 
 */
public class KeyValueToMultimapQueryResult implements Function<Entry<Key, Value>, MultimapRecord> {

    private static final KeyValueToMultimapQueryResult INSTANCE = new KeyValueToMultimapQueryResult();

    public MultimapRecord apply(Entry<Key, Value> input) {
        DataInputBuffer buf = new DataInputBuffer();
        buf.reset(input.getValue().get(), input.getValue().getSize());

        try {
            return MultimapRecord.recreate(buf);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static MultimapRecord transform(Entry<Key, Value> input) {
        return INSTANCE.apply(input);
    }

    public static MultimapRecord transform(Value input) {
        return INSTANCE.apply(Maps.immutableEntry((Key) null, input));
    }

}