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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.apache.phoenix.hbase.index;

import java.util.ArrayList;
import java.util.List;
import java.util.Map.Entry;

import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.phoenix.hbase.index.util.ImmutableBytesPtr;

public class MultiMutation extends Mutation {

    private ImmutableBytesPtr rowKey;

    public MultiMutation(ImmutableBytesPtr rowkey) {
      this.rowKey = rowkey;
    }

    /**
     * @param stored
     */
    public void addAll(Mutation stored) {
      // add all the kvs
      for (Entry> kvs : stored.getFamilyCellMap().entrySet()) {
        byte[] family = kvs.getKey();
        List list = getKeyValueList(family, kvs.getValue().size());
        list.addAll(kvs.getValue());
        familyMap.put(family, list);
      }

      // add all the attributes, not overriding already stored ones
      for (Entry attrib : stored.getAttributesMap().entrySet()) {
        if (this.getAttribute(attrib.getKey()) == null) {
          this.setAttribute(attrib.getKey(), attrib.getValue());
        }
      }
    }

    private List getKeyValueList(byte[] family, int hint) {
      List list = familyMap.get(family);
      if (list == null) {
        list = new ArrayList(hint);
      }
      return list;
    }

    @Override
    public byte[] getRow(){
      return this.rowKey.copyBytesIfNecessary();
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((rowKey == null) ? 0 : rowKey.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null) return false;
        if (getClass() != obj.getClass()) return false;
        MultiMutation other = (MultiMutation)obj;
        return rowKey.equals(other.rowKey);
    }

  }