content: /**
   * 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.apex.malhar.contrib.misc.streamquery.index;
  
  import java.util.Map;
  
  import javax.validation.constraints.NotNull;
  
  import org.apache.apex.malhar.lib.streamquery.index.ColumnIndex;
  
  /**
   * <p>An implementation of Column Index that implements filter method based on mid index. </p>
   * <p>
   * @displayName Mid Index
   * @category Stream Manipulators
   * @tags index
   * @since 0.3.4
   * @deprecated
   */
  @Deprecated
  public class MidIndex extends ColumnIndex
  {
    private int start;
    private int length = 0;
  
    public MidIndex(@NotNull String column, String alias, int start)
    {
      super(column, alias);
      assert (start >= 0);
      this.start = start;
    }
  
    @Override
    public void filter(@NotNull  Map<String, Object> row, @NotNull  Map<String, Object> collect)
    {
      if (!row.containsKey(column)) {
        return;
      }
      if (!(row.get(column) instanceof String)) {
        assert (false);
      }
      String name = getColumn();
      if (alias != null) {
        name = alias;
      }
  
      int endIndex = start + length;
      if ((length == 0) || (endIndex > ((String)row.get(column)).length())) {
        collect.put(name, row.get(column));
      } else {
        collect.put(name, ((String)row.get(column)).substring(start, endIndex));
      }
    }
  
    public int getLength()
    {
      return length;
    }
  
    public void setLength(int length)
    {
      assert (length > 0);
      this.length = length;
    }
  }
  
  