/*
 * Copyright 2017 Graz University of Technology EAAF-Core Components has been developed in a
 * cooperation between EGIZ, A-SIT Plus, A-SIT, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by the European
 * Commission - subsequent versions of the EUPL (the "Licence"); You may not use this work except in
 * compliance with the Licence. You may obtain a copy of the Licence at:
 * https://joinup.ec.europa.eu/news/understanding-eupl-v12
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the Licence
 * is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the Licence for the specific language governing permissions and limitations under
 * the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text file for details on the
 * various modules and licenses. The "NOTICE" text file is part of the distribution. Any derivative
 * works that you distribute must include a readable copy of the "NOTICE" text file.
*/

package at.gv.egiz.eaaf.core.impl.idp.process;

import java.io.Serializable;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import at.gv.egiz.eaaf.core.api.idp.process.ExecutionContext;

/**
 * ExecutionContext implementation, related to a certain process instance.
 *
 * @author tknall
 *
 */
public class ExecutionContextImpl implements ExecutionContext {

  private static final long serialVersionUID = 1L;

  private final Map<String, Serializable> ctxData =
      Collections.synchronizedMap(new HashMap<String, Serializable>());

  private String processInstanceId;
  private boolean markedAsCancelled = false;

  /**
   * Creates a new instance.
   */
  public ExecutionContextImpl() {

  }

  /**
   * Creates a new instance and associated it with a certain process instance.
   */
  public ExecutionContextImpl(final String processInstanceId) {
    this.processInstanceId = processInstanceId;
  }

  @Override
  public void setProcessInstanceId(final String processInstanceId) {
    this.processInstanceId = processInstanceId;
  }

  @Override
  public String getProcessInstanceId() {
    return processInstanceId;
  }

  @Override
  public Serializable get(final String key) {
    return ctxData.get(key);
  }

  @Override
  public Serializable remove(final String key) {
    return ctxData.remove(key);
  }

  @Override
  public void put(final String key, final Serializable object) {
    ctxData.put(key, object);
  }

  @Override
  public Set<String> keySet() {
    return Collections.unmodifiableSet(ctxData.keySet());
  }

  @Override
  public String toString() {
    final StringBuilder builder = new StringBuilder();
    builder.append("ExecutionContextImpl [");
    builder.append("id=").append(processInstanceId);
    builder.append(", variables=");
    builder.append(ctxData.keySet());
    builder.append("]");
    return builder.toString();
  }

  @Override
  public boolean isProcessCancelled() {
    return markedAsCancelled;
  }

  @Override
  public void setCanceleProcessFlag() {
    markedAsCancelled = true;

  }

}