/* 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.xml.impl.type.reference;
import org.camunda.bpm.model.xml.ModelException;
import org.camunda.bpm.model.xml.ModelReferenceException;
import org.camunda.bpm.model.xml.impl.ModelInstanceImpl;
import org.camunda.bpm.model.xml.impl.instance.ModelElementInstanceImpl;
import org.camunda.bpm.model.xml.instance.ModelElementInstance;
import org.camunda.bpm.model.xml.type.child.ChildElement;
import org.camunda.bpm.model.xml.type.reference.ElementReference;
/**
* @author Sebastian Menski
*/
public class ElementReferenceImpl<Target extends ModelElementInstance, Source extends ModelElementInstance> extends ElementReferenceCollectionImpl<Target,Source> implements ElementReference<Target, Source> {
public ElementReferenceImpl(ChildElement<Source> referenceSourceCollection) {
super(referenceSourceCollection);
}
private ChildElement<Source> getReferenceSourceChild() {
return (ChildElement<Source>) getReferenceSourceCollection();
}
public Source getReferenceSource(ModelElementInstance referenceSourceParent) {
return getReferenceSourceChild().getChild(referenceSourceParent);
}
private void setReferenceSource(ModelElementInstance referenceSourceParent, Source referenceSource) {
getReferenceSourceChild().setChild(referenceSourceParent, referenceSource);
}
@SuppressWarnings("unchecked")
public Target getReferenceTargetElement(ModelElementInstanceImpl referenceSourceParentElement) {
Source referenceSource = getReferenceSource(referenceSourceParentElement);
if (referenceSource != null) {
String identifier = getReferenceIdentifier(referenceSource);
ModelElementInstance referenceTargetElement = referenceSourceParentElement.getModelInstance().getModelElementById(identifier);
if (referenceTargetElement != null) {
return (Target) referenceTargetElement;
}
else {
throw new ModelException("Unable to find a model element instance for id " + identifier);
}
}
else {
return null;
}
}
public void setReferenceTargetElement(ModelElementInstanceImpl referenceSourceParentElement, Target referenceTargetElement) {
ModelInstanceImpl modelInstance = referenceSourceParentElement.getModelInstance();
String identifier = referenceTargetAttribute.getValue(referenceTargetElement);
ModelElementInstance existingElement = modelInstance.getModelElementById(identifier);
if (existingElement == null || !existingElement.equals(referenceTargetElement)) {
throw new ModelReferenceException("Cannot create reference to model element " + referenceTargetElement
+": element is not part of model. Please connect element to the model first.");
}
else {
Source referenceSourceElement = modelInstance.newInstance(getReferenceSourceElementType());
setReferenceSource(referenceSourceParentElement, referenceSourceElement);
setReferenceIdentifier(referenceSourceElement, identifier);
}
}
public void clearReferenceTargetElement(ModelElementInstanceImpl referenceSourceParentElement) {
getReferenceSourceChild().removeChild(referenceSourceParentElement);
}
}