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/*
 * Copyright 2004-2007 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 java.util.HashMap;

import org.springframework.binding.collection.SharedMapDecorator;
import org.springframework.webflow.context.ExternalContext;
import org.springframework.webflow.core.collection.LocalAttributeMap;
import org.springframework.webflow.core.collection.LocalSharedAttributeMap;
import org.springframework.webflow.core.collection.MutableAttributeMap;
import org.springframework.webflow.core.collection.ParameterMap;
import org.springframework.webflow.core.collection.SharedAttributeMap;

/**
 * Mock implementation of the {@link ExternalContext} interface.
 * 
 * @see ExternalContext
 * 
 * @author Keith Donald
 */
public class MockExternalContext implements ExternalContext {

	private String contextPath;
	
	private String dispatcherPath;

	private String requestPathInfo;

	private ParameterMap requestParameterMap = new MockParameterMap();

	private MutableAttributeMap requestMap = new LocalAttributeMap();

	private SharedAttributeMap sessionMap = new LocalSharedAttributeMap(new SharedMapDecorator(new HashMap()));
	
	private SharedAttributeMap globalSessionMap = sessionMap;

	private SharedAttributeMap applicationMap = new LocalSharedAttributeMap(new SharedMapDecorator(new HashMap()));

	/**
	 * Creates a mock external context with an empty request parameter map.
	 * Allows for bean style usage.
	 */
	public MockExternalContext() {
	}

	/**
	 * Creates a mock external context with the specified parameters in the
	 * request parameter map. All other properties of the external context
	 * can be set using the appropriate setter.
	 * @param requestParameterMap the request parameters
	 */
	public MockExternalContext(ParameterMap requestParameterMap) {
		if (requestParameterMap != null) {
			this.requestParameterMap = requestParameterMap;
		}
	}

	// implementing external context
	
	public String getContextPath() {
		return contextPath;
	}
	
	public String getDispatcherPath() {
		return dispatcherPath;
	}

	public String getRequestPathInfo() {
		return requestPathInfo;
	}

	public ParameterMap getRequestParameterMap() {
		return requestParameterMap;
	}

	public MutableAttributeMap getRequestMap() {
		return requestMap;
	}

	public SharedAttributeMap getSessionMap() {
		return sessionMap;
	}

	public SharedAttributeMap getGlobalSessionMap() {
		return globalSessionMap;
	}
	
	public SharedAttributeMap getApplicationMap() {
		return applicationMap;
	}

	// helper setters

	/**
	 * Set the context path.
	 * @see ExternalContext#getContextPath()
	 */
	public void setContextPath(String contextPath) {
		this.contextPath = contextPath;
	}
	
	/**
	 * Set the dispatcher path.
	 * @see ExternalContext#getDispatcherPath()
	 */
	public void setDispatcherPath(String dispatcherPath) {
		this.dispatcherPath = dispatcherPath;
	}

	/**
	 * Set the request path info.
	 * @see ExternalContext#getRequestPathInfo()
	 */
	public void setRequestPathInfo(String requestPathInfo) {
		this.requestPathInfo = requestPathInfo;
	}

	/**
	 * Set the request parameter map.
	 * @see ExternalContext#getRequestParameterMap()
	 */
	public void setRequestParameterMap(ParameterMap requestParameterMap) {
		this.requestParameterMap = requestParameterMap;
	}
	
	/**
	 * Set the request attribute map.
	 * @see ExternalContext#getRequestMap()
	 */
	public void setRequestMap(MutableAttributeMap requestMap) {
		this.requestMap = requestMap;
	}

	/**
	 * Set the session attribute map.
	 * @see ExternalContext#getSessionMap()
	 */
	public void setSessionMap(SharedAttributeMap sessionMap) {
		this.sessionMap = sessionMap;
	}
	
	/**
	 * Set the global session attribute map. By default the session attribute
	 * map and the global session attribute map are one and the same.
	 * @see ExternalContext#getGlobalSessionMap()
	 */
	public void setGlobalSessionMap(SharedAttributeMap globalSessionMap) {
		this.globalSessionMap = globalSessionMap;
	}

	/**
	 * Set the application attribute map.
	 * @see ExternalContext#getApplicationMap()
	 */
	public void setApplicationMap(SharedAttributeMap applicationMap) {
		this.applicationMap = applicationMap;
	}
	
	// convenience helpers

	/**
	 * Returns the request parameter map as a {@link MockParameterMap}
	 * for convenient access in a unit test.
	 * @see #getRequestParameterMap()
	 */
	public MockParameterMap getMockRequestParameterMap() {
		return (MockParameterMap)requestParameterMap;
	}
	
	/**
	 * Puts a request parameter into the mock parameter map.
	 * @param parameterName the parameter name
	 * @param parameterValue the parameter value
	 */
	public void putRequestParameter(String parameterName, String parameterValue) {
		getMockRequestParameterMap().put(parameterName, parameterValue);
	}

	/**
	 * Puts a multi-valued request parameter into the mock parameter map.
	 * @param parameterName the parameter name
	 * @param parameterValues the parameter values
	 */
	public void putRequestParameter(String parameterName, String[] parameterValues) {
		getMockRequestParameterMap().put(parameterName, parameterValues);
	}
}