/*
* JBoss, Home of Professional Open Source
* Copyright 2010, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.jboss.weld.tck;
import javax.el.ArrayELResolver;
import javax.el.BeanELResolver;
import javax.el.CompositeELResolver;
import javax.el.ELContext;
import javax.el.ELContextEvent;
import javax.el.ELContextListener;
import javax.el.ELResolver;
import javax.el.ExpressionFactory;
import javax.el.FunctionMapper;
import javax.el.ListELResolver;
import javax.el.MapELResolver;
import javax.el.ResourceBundleELResolver;
import javax.el.VariableMapper;
import javax.enterprise.inject.spi.BeanManager;
import org.jboss.cdi.tck.spi.EL;
import org.jboss.weld.bean.builtin.BeanManagerProxy;
import org.jboss.weld.el.WeldELContextListener;
import org.jboss.weld.el.WeldExpressionFactory;
import org.jboss.weld.manager.BeanManagerImpl;
/**
*
*
*/
public class ELImpl implements EL {
public static final ExpressionFactory EXPRESSION_FACTORY = new WeldExpressionFactory(ExpressionFactory.newInstance());
public static final ELContextListener[] EL_CONTEXT_LISTENERS = { new WeldELContextListener() };
@SuppressWarnings("unchecked")
public <T> T evaluateValueExpression(BeanManager beanManager, String expression, Class<T> expectedType) {
ELContext elContext = createELContext(beanManager);
return (T) EXPRESSION_FACTORY.createValueExpression(elContext, expression, expectedType).getValue(elContext);
}
@SuppressWarnings("unchecked")
public <T> T evaluateMethodExpression(BeanManager beanManager, String expression, Class<T> expectedType,
Class<?>[] expectedParamTypes, Object[] expectedParams) {
ELContext elContext = createELContext(beanManager);
return (T) EXPRESSION_FACTORY.createMethodExpression(elContext, expression, expectedType, expectedParamTypes).invoke(
elContext, expectedParams);
}
public ELContext createELContext(BeanManager beanManager) {
if (beanManager instanceof BeanManagerProxy) {
BeanManagerProxy proxy = (BeanManagerProxy) beanManager;
beanManager = proxy.delegate();
}
if (beanManager instanceof BeanManagerImpl) {
return createELContext((BeanManagerImpl) beanManager);
} else {
throw new IllegalStateException("Wrong manager");
}
}
private ELContext createELContext(BeanManagerImpl beanManagerImpl) {
final ELResolver resolver = createELResolver(beanManagerImpl);
ELContext context = new ELContext() {
@Override
public ELResolver getELResolver() {
return resolver;
}
@Override
public FunctionMapper getFunctionMapper() {
return null;
}
@Override
public VariableMapper getVariableMapper() {
return null;
}
};
callELContextListeners(context);
return context;
}
private ELResolver createELResolver(BeanManagerImpl beanManagerImpl) {
CompositeELResolver resolver = new CompositeELResolver();
resolver.add(beanManagerImpl.getELResolver());
resolver.add(new MapELResolver());
resolver.add(new ListELResolver());
resolver.add(new ArrayELResolver());
resolver.add(new ResourceBundleELResolver());
resolver.add(new BeanELResolver());
return resolver;
}
private void callELContextListeners(ELContext context) {
ELContextEvent event = new ELContextEvent(context);
for (ELContextListener listener : EL_CONTEXT_LISTENERS) {
listener.contextCreated(event);
}
}
}