org.springframework.webflow.expression.spel.ActionPropertyAccessor Maven / Gradle / Ivy
/*
* Copyright 2004-2012 the original author or authors.
*
* 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.springframework.webflow.expression.spel;
import org.springframework.expression.AccessException;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.PropertyAccessor;
import org.springframework.expression.TypedValue;
import org.springframework.webflow.action.MultiAction;
import org.springframework.webflow.execution.Action;
import org.springframework.webflow.execution.AnnotatedAction;
/**
*
* Spring EL Property Accessor that allows invocation of methods against a resolved Web Flow action, typically a
* {@link MultiAction} in expressions.
*
*
* @see org.springframework.webflow.action.EvaluateAction
*
* @author Rossen Stoyanchev
* @since 2.1
*/
public class ActionPropertyAccessor implements PropertyAccessor {
public Class[] getSpecificTargetClasses() {
return new Class[] { Action.class };
}
public boolean canRead(EvaluationContext context, Object target, String name) throws AccessException {
return true;
}
public TypedValue read(EvaluationContext context, Object target, String name) throws AccessException {
AnnotatedAction annotated = new AnnotatedAction((Action) target);
annotated.setMethod(name);
return new TypedValue(annotated);
}
public boolean canWrite(EvaluationContext context, Object target, String name) throws AccessException {
return false;
}
public void write(EvaluationContext context, Object target, String name, Object newValue) throws AccessException {
throw new AccessException("The Action cannot be set with an expression.");
}
}