org.springframework.webflow.action.DefaultMultiActionMethodResolver Maven / Gradle / Ivy
/*
* Copyright 2002-2006 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.action;
import org.springframework.webflow.action.MultiAction.MethodResolver;
import org.springframework.webflow.execution.RequestContext;
/**
* Default method resolver used by the MultiAction class. It uses the following
* algorithm to calculate a method name:
*
* - If the currently executing action has a "method" property defined, use
* the value as method name.
* - Else use the name of the current state of the flow execution as a method
* name.
*
*
* @see org.springframework.webflow.action.MultiAction
*
* @author Erwin Vervaet
*/
public class DefaultMultiActionMethodResolver implements MethodResolver {
public String resolveMethod(RequestContext context) {
// implementation note: not using AnnotatedAction.METHOD_ATTRIBUTE since
// that resides in the engine subsystem
String method = context.getAttributes().getString("method");
if (method == null) {
if (context.getCurrentState() != null) {
// default to the state id
method = context.getCurrentState().getId();
}
else {
throw new IllegalStateException("Unable to resolve action method; no 'method' context attribute set");
}
}
return method;
}
}