contrib/src/main/java/org/apache/apex/malhar/contrib/misc/streamquery/condition/CompoundCondition.java

/**
 * 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.condition;

import java.util.Map;

import javax.validation.constraints.NotNull;

import org.apache.apex.malhar.lib.streamquery.condition.Condition;

/**
 * A derivation of Condition index that implements logical AND/OR select expression. <br>
 * <p>
 * Class provides logical OR or AND function specified in parameters. User can implement
 * complex and/or expression by chaining operator itself.
 * <br>
 * <b> Properties : </b> <br>
 * <b> leftCondition : </b> Left validate row condition . <br>
 * <b> rightCondition : </b> Right validate row condition. <br>
 * <b> logicalOr : </b> OR/AND logical metric flag. <br>
 * <br>
 * @displayName Compound Condition
 * @category Stream Manipulators
 * @tags sql condition, logical
 * @since 0.3.4
 * @deprecated
 */
@Deprecated
public class CompoundCondition extends Condition
{
  /**
   * Left validate row condition .
   */
  @NotNull
  private Condition leftCondition;

  /**
   * Right validate row condition .
   */
  @NotNull
  private Condition rightCondition;

  /**
   * AND/OR metric flag.
   */
  private boolean logicalOr = true;

  /**
   * Constructor for logical or metric.
   *
   * @param leftCondition  Left validate row condition, must be non null. <br>
   * @param rightCondition Right validate row condition, must be non null. <br>
   */
  public CompoundCondition(Condition leftCondition, Condition rightCondition)
  {
    this.leftCondition = leftCondition;
    this.rightCondition = rightCondition;
  }

  /**
   * Constructor for logical and metric if logical and parameter is true.
   * <br>
   *
   * @param leftCondition  Left validate row condition, must be non null. <br>
   * @param rightCondition Right validate row condition, must be non null. <br>
   * @param isLogicalAnd   Logical AND if true.
   */
  public CompoundCondition(Condition leftCondition, Condition rightCondition, boolean isLogicalAnd)
  {
    this.leftCondition = leftCondition;
    this.rightCondition = rightCondition;
    logicalOr = !isLogicalAnd;
  }

  @Override
  public boolean isValidRow(Map<String, Object> row)
  {
    if (logicalOr) {
      return leftCondition.isValidRow(row) || rightCondition.isValidRow(row);
    } else {
      return leftCondition.isValidRow(row) && rightCondition.isValidRow(row);
    }
  }

  @Override
  public boolean isValidJoin(Map<String, Object> row1, Map<String, Object> row2)
  {
    // TODO Auto-generated method stub
    return false;
  }

  public Condition getLeftCondition()
  {
    return leftCondition;
  }

  public void setLeftCondition(Condition leftCondition)
  {
    this.leftCondition = leftCondition;
  }

  public Condition getRightCondition()
  {
    return rightCondition;
  }

  public void setRightCondition(Condition rightCondition)
  {
    this.rightCondition = rightCondition;
  }

  public void setLogicalAnd()
  {
    this.logicalOr = false;
  }
}