/* 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.engine.spring;
import java.beans.FeatureDescriptor;
import java.util.Iterator;
import org.camunda.bpm.engine.ProcessEngineException;
import org.camunda.bpm.engine.impl.javax.el.ELContext;
import org.camunda.bpm.engine.impl.javax.el.ELResolver;
import org.springframework.context.ApplicationContext;
/**
* @author Tom Baeyens
* @author Frederik Heremans
*/
public class ApplicationContextElResolver extends ELResolver {
protected ApplicationContext applicationContext;
public ApplicationContextElResolver(ApplicationContext applicationContext) {
this.applicationContext = applicationContext;
}
public Object getValue(ELContext context, Object base, Object property) {
if (base == null) {
// according to javadoc, can only be a String
String key = (String) property;
if (applicationContext.containsBean(key)) {
context.setPropertyResolved(true);
return applicationContext.getBean(key);
}
}
return null;
}
public boolean isReadOnly(ELContext context, Object base, Object property) {
return true;
}
public void setValue(ELContext context, Object base, Object property, Object value) {
if(base == null) {
String key = (String) property;
if (applicationContext.containsBean(key)) {
throw new ProcessEngineException("Cannot set value of '" + property +
"', it resolves to a bean defined in the Spring application-context.");
}
}
}
public Class< ? > getCommonPropertyType(ELContext context, Object arg) {
return Object.class;
}
public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, Object arg) {
return null;
}
public Class< ? > getType(ELContext context, Object arg1, Object arg2) {
return Object.class;
}
}