org.flowable.engine.impl.bpmn.helper.ClassDelegateCollectionHandler Maven / Gradle / Ivy
/* 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.flowable.engine.impl.bpmn.helper;
import java.util.Collection;
import java.util.List;
import org.flowable.common.engine.api.FlowableIllegalArgumentException;
import org.flowable.engine.delegate.DelegateExecution;
import org.flowable.engine.impl.bpmn.parser.FieldDeclaration;
import org.flowable.engine.impl.delegate.FlowableCollectionHandler;
/**
* Helper class for Collection handlers to allow class delegation.
*
* This class will lazily instantiate the referenced classes when needed at runtime.
*
* @author Lori Small
*/
public class ClassDelegateCollectionHandler extends AbstractClassDelegate implements FlowableCollectionHandler {
private static final long serialVersionUID = 1L;
public ClassDelegateCollectionHandler(String className, List fieldDeclarations) {
super(className, fieldDeclarations);
}
public ClassDelegateCollectionHandler(Class clazz, List fieldDeclarations) {
super(clazz, fieldDeclarations);
}
@Override
@SuppressWarnings("rawtypes")
public Collection resolveCollection(Object collectionValue, DelegateExecution execution) {
return getCollectionHandlerInstance().resolveCollection(collectionValue, execution);
}
protected FlowableCollectionHandler getCollectionHandlerInstance() {
Object delegateInstance = instantiateDelegate(className, fieldDeclarations);
if (delegateInstance instanceof FlowableCollectionHandler) {
return (FlowableCollectionHandler) delegateInstance;
} else {
throw new FlowableIllegalArgumentException(delegateInstance.getClass().getName() + " doesn't implement " + FlowableCollectionHandler.class);
}
}
}