/*
 * 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.filter;

import java.io.IOException;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Writables;
import org.apache.phoenix.expression.Expression;

/**
 * SingleKeyValueComparisonFilter that needs to compare both the column family and column qualifier
 * parts of the key value to disambiguate with another similarly named column qualifier in a
 * different column family.
 */
public class SingleCFCQKeyValueComparisonFilter extends SingleKeyValueComparisonFilter {
  public SingleCFCQKeyValueComparisonFilter() {
  }

  public SingleCFCQKeyValueComparisonFilter(Expression expression) {
    super(expression);
  }

  @Override
  protected final int compare(byte[] cfBuf, int cfOffset, int cfLength, byte[] cqBuf, int cqOffset,
    int cqLength) {
    int c = Bytes.compareTo(cf, 0, cf.length, cfBuf, cfOffset, cfLength);
    if (c != 0) return c;
    return Bytes.compareTo(cq, 0, cq.length, cqBuf, cqOffset, cqLength);
  }

  public static SingleCFCQKeyValueComparisonFilter parseFrom(final byte[] pbBytes)
    throws DeserializationException {
    try {
      return (SingleCFCQKeyValueComparisonFilter) Writables.getWritable(pbBytes,
        new SingleCFCQKeyValueComparisonFilter());
    } catch (IOException e) {
      throw new DeserializationException(e);
    }
  }
}
