/* 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;
import org.camunda.bpm.model.xml.Model;
import org.camunda.bpm.model.xml.ModelBuilder;
import org.camunda.bpm.model.xml.ModelException;
import org.camunda.bpm.model.xml.ModelInstance;
import org.camunda.bpm.model.xml.impl.instance.ModelElementInstanceImpl;
import org.camunda.bpm.model.xml.impl.util.ModelUtil;
import org.camunda.bpm.model.xml.instance.DomDocument;
import org.camunda.bpm.model.xml.instance.DomElement;
import org.camunda.bpm.model.xml.instance.ModelElementInstance;
import org.camunda.bpm.model.xml.type.ModelElementType;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
/**
* An instance of a model
*
* @author Daniel Meyer
* @author Sebastian Menski
*
*/
public class ModelInstanceImpl implements ModelInstance {
private final DomDocument document;
private ModelImpl model;
private final ModelBuilder modelBuilder;
public ModelInstanceImpl(ModelImpl model, ModelBuilder modelBuilder, DomDocument document) {
this.model = model;
this.modelBuilder = modelBuilder;
this.document = document;
}
public DomDocument getDocument() {
return document;
}
public ModelElementInstance getDocumentElement() {
DomElement rootElement = document.getRootElement();
if(rootElement != null) {
return ModelUtil.getModelElement(rootElement, this);
} else {
return null;
}
}
public void setDocumentElement(ModelElementInstance modelElement) {
ModelUtil.ensureInstanceOf(modelElement, ModelElementInstanceImpl.class);
DomElement domElement = modelElement.getDomElement();
document.setRootElement(domElement);
}
public <T extends ModelElementInstance> T newInstance(Class<T> type) {
ModelElementType modelElementType = model.getType(type);
if(modelElementType != null) {
return newInstance(modelElementType);
} else {
throw new ModelException("Cannot create instance of ModelType "+type+": no such type registered.");
}
}
@SuppressWarnings("unchecked")
public <T extends ModelElementInstance> T newInstance(ModelElementType type) {
return (T) type.newInstance(this);
}
public Model getModel() {
return model;
}
public ModelElementType registerGenericType(String namespaceUri, String localName) {
ModelElementType elementType = model.getTypeForName(namespaceUri, localName);
if (elementType == null) {
elementType = modelBuilder.defineGenericType(localName, namespaceUri);
model = (ModelImpl) modelBuilder.build();
}
return elementType;
}
@SuppressWarnings("unchecked")
public <T extends ModelElementInstance> T getModelElementById(String id) {
if (id == null) {
return null;
}
DomElement element = document.getElementById(id);
if(element != null) {
return (T) ModelUtil.getModelElement(element, this);
} else {
return null;
}
}
public Collection<ModelElementInstance> getModelElementsByType(ModelElementType type) {
Collection<ModelElementType> extendingTypes = type.getAllExtendingTypes();
List<ModelElementInstance> instances = new ArrayList<ModelElementInstance>();
for (ModelElementType modelElementType : extendingTypes) {
if(!modelElementType.isAbstract()) {
instances.addAll(modelElementType.getInstances(this));
}
}
return instances;
}
@SuppressWarnings("unchecked")
public <T extends ModelElementInstance> Collection<T> getModelElementsByType(Class<T> referencingClass) {
return (Collection<T>) getModelElementsByType(getModel().getType(referencingClass));
}
/**
* Clones the model instance but not the model. So only the wrapped DOM document is cloned.
* Changes of the model are persistent between multiple model instances.
*
* @return the new model instance
*/
public Object clone() {
return new ModelInstanceImpl(model, modelBuilder, document.clone());
}
}