/* 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 org.camunda.bpm.engine.impl.el.ExpressionManager;
import org.camunda.bpm.engine.impl.el.ReadOnlyMapELResolver;
import org.camunda.bpm.engine.impl.el.VariableScopeElResolver;
import org.camunda.bpm.engine.impl.javax.el.ArrayELResolver;
import org.camunda.bpm.engine.impl.javax.el.BeanELResolver;
import org.camunda.bpm.engine.impl.javax.el.CompositeELResolver;
import org.camunda.bpm.engine.impl.javax.el.ELResolver;
import org.camunda.bpm.engine.impl.javax.el.ListELResolver;
import org.camunda.bpm.engine.impl.javax.el.MapELResolver;
import org.springframework.context.ApplicationContext;
import java.util.Map;
/**
* {@link ExpressionManager} that exposes the full application-context or a limited set
* of beans in expressions.
*
* @author Tom Baeyens
*/
public class SpringExpressionManager extends ExpressionManager {
protected ApplicationContext applicationContext;
/**
* @param applicationContext
* the applicationContext to use. Ignored when 'beans' parameter is
* not null.
* @param beans
* a map of custom beans to expose. If null, all beans in the
* application-context will be exposed.
*/
public SpringExpressionManager(ApplicationContext applicationContext, Map<Object, Object> beans) {
super(beans);
this.applicationContext = applicationContext;
}
@Override
protected ELResolver createElResolver() {
CompositeELResolver compositeElResolver = new CompositeELResolver();
compositeElResolver.add(new VariableScopeElResolver());
if(beans != null) {
// Only expose limited set of beans in expressions
compositeElResolver.add(new ReadOnlyMapELResolver(beans));
} else {
// Expose full application-context in expressions
compositeElResolver.add(new ApplicationContextElResolver(applicationContext));
}
compositeElResolver.add(new ArrayELResolver());
compositeElResolver.add(new ListELResolver());
compositeElResolver.add(new MapELResolver());
compositeElResolver.add(new BeanELResolver());
return compositeElResolver;
}
}