/*
 * 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.test;

import org.springframework.webflow.core.collection.AttributeMap;
import org.springframework.webflow.execution.Action;
import org.springframework.webflow.execution.Event;
import org.springframework.webflow.execution.RequestContext;
import org.springframework.webflow.test.execution.AbstractExternalizedFlowExecutionTests;
import org.springframework.webflow.test.execution.AbstractXmlFlowExecutionTests;

/**
 * A trivial stub action implementation that can be parameterized to return a particular action execution result. Useful
 * for simulating different action results a flow should be capable of responding to.
 * 
 * Instances of this class can be conveniently installed in the bean factory that hosts the Web Flow action
 * implementations in a test environment by overriding <code>registerMockServices</code> on
 * {@link AbstractExternalizedFlowExecutionTests}. If you are using a XML-based flow definition with a flow-local
 * context to host your actions, consider overriding <code>registerLocalMockServices</code> on
 * {@link AbstractXmlFlowExecutionTests} to install mock instances.
 * 
 * @author Keith Donald
 */
public class MockAction implements Action {

	private String resultEventId;

	private AttributeMap<Object> resultAttributes;

	/**
	 * Constructs a new mock action that returns the default <code>success</code> execution result.
	 */
	public MockAction() {
		setResultEventId("success");
	}

	/**
	 * Constructs a new mock action that returns the provided execution result.
	 * @param resultEventId the execution result identifier that will be returned
	 */
	public MockAction(String resultEventId) {
		setResultEventId(resultEventId);
	}

	/**
	 * Sets the event identifier this mock action will use as its execution outcome.
	 * @param resultEventId the action execution result identifier
	 */
	public void setResultEventId(String resultEventId) {
		this.resultEventId = resultEventId;
	}

	/**
	 * Sets attributes to associate with a returned action execution outcome.
	 * @param resultAttributes the action execution result attributes
	 */
	public void setResultAttributes(AttributeMap<Object> resultAttributes) {
		this.resultAttributes = resultAttributes;
	}

	public Event execute(RequestContext context) {
		return new Event(this, resultEventId, resultAttributes);
	}

}