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/* 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 org.camunda.bpm.engine.impl.cmd;

import java.io.Serializable;
import java.util.Collection;
import java.util.Map;

import org.camunda.bpm.engine.impl.interceptor.Command;
import org.camunda.bpm.engine.impl.interceptor.CommandContext;

/**
 * Patches execution variables: First, applies modifications to existing variables and then deletes
 * specified variables. 
 * 
 * @author Thorben Lindhauer
 *
 */
public class PatchExecutionVariablesCmd implements Command, Serializable {

  private static final long serialVersionUID = 1L;

  protected String executionId;
  protected Map modifications;
  protected Collection deletions;
  protected boolean isLocal;
  
  public PatchExecutionVariablesCmd(String executionId, Map modifications, Collection deletions, boolean isLocal) {
    this.modifications = modifications;
    this.deletions = deletions;
    this.executionId = executionId;
    this.isLocal = isLocal;
  }
  
  @Override
  public Void execute(CommandContext commandContext) {
    new SetExecutionVariablesCmd(executionId, modifications, isLocal).execute(commandContext);
    new RemoveExecutionVariablesCmd(executionId, deletions, isLocal).execute(commandContext);
    return null;
  }

}