/* 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.child;
import org.camunda.bpm.model.xml.impl.instance.ModelElementInstanceImpl;
import org.camunda.bpm.model.xml.impl.type.ModelElementTypeImpl;
import org.camunda.bpm.model.xml.impl.util.ModelUtil;
import org.camunda.bpm.model.xml.instance.ModelElementInstance;
import org.camunda.bpm.model.xml.type.child.ChildElement;
/**
* Represents a single Child Element (ie. maxOccurs = 1);
*
* @author Daniel Meyer
*
*/
public class ChildElementImpl<T extends ModelElementInstance> extends ChildElementCollectionImpl<T> implements ChildElement<T> {
public ChildElementImpl(Class<T> childElementTypeChild, ModelElementTypeImpl parentElementType) {
super(childElementTypeChild, parentElementType);
this.maxOccurs = 1;
}
/** the add operation replaces the child */
private void performAddOperation(ModelElementInstanceImpl modelElement, T e) {
modelElement.setUniqueChildElementByNameNs(e);
}
public void setChild(ModelElementInstance element, T newChildElement) {
performAddOperation((ModelElementInstanceImpl) element, newChildElement);
}
@SuppressWarnings("unchecked")
public T getChild(ModelElementInstance element) {
ModelElementInstanceImpl elementInstanceImpl = (ModelElementInstanceImpl)element;
ModelElementInstance childElement = elementInstanceImpl.getUniqueChildElementByType(childElementTypeClass);
if(childElement != null) {
ModelUtil.ensureInstanceOf(childElement, childElementTypeClass);
return (T) childElement;
} else {
return null;
}
}
public boolean removeChild(ModelElementInstance element) {
ModelElementInstanceImpl childElement = (ModelElementInstanceImpl) getChild(element);
ModelElementInstanceImpl elementInstanceImpl = (ModelElementInstanceImpl) element;
return elementInstanceImpl.removeChildElement(childElement);
}
}