/* 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.cdi.impl.el;
import java.beans.FeatureDescriptor;
import java.util.Iterator;
import javax.enterprise.inject.spi.BeanManager;
import org.camunda.bpm.engine.cdi.impl.util.BeanManagerLookup;
import org.camunda.bpm.engine.cdi.impl.util.ProgrammaticBeanLookup;
import org.camunda.bpm.engine.impl.javax.el.ELContext;
import org.camunda.bpm.engine.impl.javax.el.ELResolver;
/**
* Resolver wrapping an instance of javax.el.ELResolver obtained from the
* {@link BeanManager}. Allows the process engine to resolve Cdi-Beans.
*
* @author Daniel Meyer
*/
public class CdiResolver extends ELResolver {
protected BeanManager getBeanManager() {
return BeanManagerLookup.getBeanManager();
}
protected javax.el.ELResolver getWrappedResolver() {
BeanManager beanManager = getBeanManager();
javax.el.ELResolver resolver = beanManager.getELResolver();
return resolver;
}
@Override
public Class< ? > getCommonPropertyType(ELContext context, Object base) {
return getWrappedResolver().getCommonPropertyType(wrapContext(context), base);
}
@Override
public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext context, Object base) {
return getWrappedResolver().getFeatureDescriptors(wrapContext(context), base);
}
@Override
public Class< ? > getType(ELContext context, Object base, Object property) {
return getWrappedResolver().getType(wrapContext(context), base, property);
}
@Override
public Object getValue(ELContext context, Object base, Object property) {
try {
return getWrappedResolver().getValue(wrapContext(context), base, property);
} catch (IllegalStateException e) {
// dependent scoped / EJBs
Object result = ProgrammaticBeanLookup.lookup(property.toString(), getBeanManager());
if(result != null) {
context.setPropertyResolved(true);
}
return result;
}
}
@Override
public boolean isReadOnly(ELContext context, Object base, Object property) {
return getWrappedResolver().isReadOnly(wrapContext(context), base, property);
}
@Override
public void setValue(ELContext context, Object base, Object property, Object value) {
getWrappedResolver().setValue(wrapContext(context), base, property, value);
}
@Override
public Object invoke(ELContext context, Object base, Object method, java.lang.Class< ? >[] paramTypes, Object[] params) {
return getWrappedResolver().invoke(wrapContext(context), base, method, paramTypes, params);
}
protected javax.el.ELContext wrapContext(ELContext context) {
return new ElContextDelegate(context, getWrappedResolver());
}
}