/* 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.model.bpmn.impl.instance;

import org.camunda.bpm.model.bpmn.instance.Assignment;
import org.camunda.bpm.model.bpmn.instance.BaseElement;
import org.camunda.bpm.model.xml.ModelBuilder;
import org.camunda.bpm.model.xml.impl.instance.ModelTypeInstanceContext;
import org.camunda.bpm.model.xml.type.ModelElementTypeBuilder;
import org.camunda.bpm.model.xml.type.child.ChildElement;
import org.camunda.bpm.model.xml.type.child.SequenceBuilder;

import static org.camunda.bpm.model.bpmn.impl.BpmnModelConstants.BPMN20_NS;
import static org.camunda.bpm.model.bpmn.impl.BpmnModelConstants.BPMN_ELEMENT_ASSIGNMENT;
import static org.camunda.bpm.model.xml.type.ModelElementTypeBuilder.ModelTypeInstanceProvider;

/**
 * The BPMN assignment element
 *
 * @author Sebastian Menski
 */
public class AssignmentImpl extends BaseElementImpl implements Assignment {

  protected static ChildElement<From> fromChild;
  protected static ChildElement<To> toChild;

  public static void registerType(ModelBuilder modelBuilder) {
    ModelElementTypeBuilder typeBuilder = modelBuilder.defineType(Assignment.class, BPMN_ELEMENT_ASSIGNMENT)
      .namespaceUri(BPMN20_NS)
      .extendsType(BaseElement.class)
      .instanceProvider(new ModelTypeInstanceProvider<Assignment>() {
        public Assignment newInstance(ModelTypeInstanceContext instanceContext) {
          return new AssignmentImpl(instanceContext);
        }
      });

    SequenceBuilder sequenceBuilder = typeBuilder.sequence();

    fromChild = sequenceBuilder.element(From.class)
      .required()
      .build();

    toChild = sequenceBuilder.element(To.class)
      .required()
      .build();

    typeBuilder.build();
  }

  public AssignmentImpl(ModelTypeInstanceContext instanceContext) {
    super(instanceContext);
  }

  public From getFrom() {
    return fromChild.getChild(this);
  }

  public void setFrom(From from) {
    fromChild.setChild(this, from);
  }

  public To getTo() {
    return toChild.getChild(this);
  }

  public void setTo(To to) {
    toChild.setChild(this, to);
  }
}