jp.co.yahoo.yosegi.binary.maker.index.SequentialBooleanCellIndex Maven / Gradle / Ivy

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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 jp.co.yahoo.yosegi.binary.maker.index;

import jp.co.yahoo.yosegi.spread.column.filter.BooleanFilter;
import jp.co.yahoo.yosegi.spread.column.filter.FilterType;
import jp.co.yahoo.yosegi.spread.column.filter.IFilter;
import jp.co.yahoo.yosegi.spread.column.index.ICellIndex;

import java.io.IOException;

public class SequentialBooleanCellIndex implements ICellIndex {

  private final byte[] buffer;

  public SequentialBooleanCellIndex( final byte[] buffer ) {
    this.buffer = buffer;
  }

  @Override
  public boolean[] filter(
      final IFilter filter , final boolean[] filterArray ) throws IOException {
    if ( filter == null ) {
      return null;
    }
    if ( filter.getFilterType() == FilterType.BOOLEAN ) {
      byte target;
      if ( ( (BooleanFilter)filter ).getFlag() ) {
        target = 1;
      } else {
        target = 0;
      }
      for ( int i = 0 ; i < buffer.length ; i++ ) {
        if ( buffer[i] == target ) {
          filterArray[i] = true;
        }
      }
      return filterArray;
    }
    return null;
  }
}