com.rapiddweller.common.accessor.ConditionalAccessor Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of rd-lib-common Show documentation

'rapiddweller Common' is an open source Java library forked from Databene Commons by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

There is a newer version: 2.0.1-jdk-11

Show newest version

/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * Licensed 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 com.rapiddweller.common.accessor;

import com.rapiddweller.common.Accessor;

/**
 * Evaluates a boolean 'condition' accessor and, depending on the result, calls one of two other accessors.
 * Created: 28.02.2013 16:17:04
 *
 * @param  the object type to access
 * @param  the type of the value to get from the object
 * @author Volker Bergmann
 * @since 0.5.21
 */
public class ConditionalAccessor implements Accessor {

  private final Accessor condition;
  private final Accessor trueAccessor;
  private final Accessor falseAccessor;

  /**
   * Instantiates a new Conditional accessor.
   *
   * @param condition     the condition
   * @param trueAccessor  the true accessor
   * @param falseAccessor the false accessor
   */
  public ConditionalAccessor(Accessor condition,
                             Accessor trueAccessor, Accessor falseAccessor) {
    this.condition = condition;
    this.trueAccessor = trueAccessor;
    this.falseAccessor = falseAccessor;
  }

  @Override
  public V getValue(C target) {
    if (condition.getValue(target)) {
      return trueAccessor.getValue(target);
    } else {
      return falseAccessor.getValue(target);
    }
  }

}