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/*
 * Copyright 2004-2014 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.List;

import org.springframework.binding.message.DefaultMessageContext;
import org.springframework.binding.message.MessageContext;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.webflow.context.ExternalContext;
import org.springframework.webflow.core.collection.AttributeMap;
import org.springframework.webflow.core.collection.LocalAttributeMap;
import org.springframework.webflow.core.collection.MutableAttributeMap;
import org.springframework.webflow.core.collection.ParameterMap;
import org.springframework.webflow.definition.FlowDefinition;
import org.springframework.webflow.definition.StateDefinition;
import org.springframework.webflow.definition.TransitionDefinition;
import org.springframework.webflow.engine.Flow;
import org.springframework.webflow.engine.Transition;
import org.springframework.webflow.engine.TransitionableState;
import org.springframework.webflow.execution.Event;
import org.springframework.webflow.execution.FlowExecutionContext;
import org.springframework.webflow.execution.FlowSession;
import org.springframework.webflow.execution.RequestContext;
import org.springframework.webflow.execution.View;

/**
 * Mock implementation of the RequestContext interface to facilitate standalone flow artifact (e.g. action)
 * unit tests.
 *
 * @see org.springframework.webflow.execution.RequestContext
 * @see org.springframework.webflow.execution.Action
 *
 * @author Keith Donald
 * @author Erwin Vervaet
 */
public class MockRequestContext implements RequestContext {

	private FlowExecutionContext flowExecutionContext;

	private ExternalContext externalContext;

	private MessageContext messageContext;

	private MutableAttributeMap requestScope = new LocalAttributeMap<>();

	private MutableAttributeMap attributes = new LocalAttributeMap<>();

	private Event currentEvent;

	private Transition currentTransition;

	private View currentView;

	/**
	 * Convenience constructor that creates a new mock request context with the following defaults:
	 * 
    *
  • A mock flow execution context with a active session of flow "mockFlow" in state "mockState". *
  • A mock external context with no request parameters set. *
* To add request parameters to this request, use the {@link #putRequestParameter(String, String)} method. */ public MockRequestContext() { this(new MockFlowExecutionContext()); } /** * Convenience constructor that creates a new mock request context with the following defaults: *
    *
  • A mock flow execution context with an active session for the specified flow. *
  • A mock external context with no request parameters set. *
* To add request parameters to this request, use the {@link #putRequestParameter(String, String)} method. * @param flow the flow definition */ public MockRequestContext(Flow flow) { this(new MockFlowExecutionContext(flow)); } /** * Convenience constructor that creates a new mock request context with the following defaults: *
    *
  • A mock flow execution context with a active session of flow "mockFlow" in state "mockState". *
  • A mock external context with the provided parameters set. *
*/ public MockRequestContext(ParameterMap requestParameterMap) { this.flowExecutionContext = new MockFlowExecutionContext(); this.externalContext = new MockExternalContext(requestParameterMap); this.messageContext = new DefaultMessageContext(); } /** * Creates a new mock request context with the provided flow execution context. To add request parameters to this * request, use the {@link #putRequestParameter(String, String)} method. * @param flowExecutionContext the flow execution context */ public MockRequestContext(FlowExecutionContext flowExecutionContext) { this.flowExecutionContext = flowExecutionContext; this.externalContext = new MockExternalContext(); this.messageContext = new DefaultMessageContext(); } // implementing RequestContext public FlowDefinition getActiveFlow() { return getFlowExecutionContext().getActiveSession().getDefinition(); } public StateDefinition getCurrentState() { return getFlowExecutionContext().getActiveSession().getState(); } public TransitionDefinition getMatchingTransition(String eventId) throws IllegalStateException { TransitionableState state = (TransitionableState) getFlowExecutionContext().getActiveSession().getState(); TransitionDefinition transition = state.getTransition(eventId); if (transition == null) { transition = getRootFlow().getGlobalTransition(eventId); } return transition; } public boolean inViewState() { return getFlowExecutionContext().isActive() && getCurrentState() != null && getCurrentState().isViewState(); } public MutableAttributeMap getRequestScope() { return requestScope; } public MutableAttributeMap getFlashScope() { return getMockFlowExecutionContext().getFlashScope(); } public MutableAttributeMap getViewScope() throws IllegalStateException { return getMockFlowExecutionContext().getActiveSession().getViewScope(); } public MutableAttributeMap getFlowScope() { return getFlowExecutionContext().getActiveSession().getScope(); } public MutableAttributeMap getConversationScope() { return getMockFlowExecutionContext().getConversationScope(); } public ParameterMap getRequestParameters() { return externalContext.getRequestParameterMap(); } public MessageContext getMessageContext() { return messageContext; } public ExternalContext getExternalContext() { return externalContext; } public FlowExecutionContext getFlowExecutionContext() { return flowExecutionContext; } public Event getCurrentEvent() { return currentEvent; } public TransitionDefinition getCurrentTransition() { return currentTransition; } public View getCurrentView() { return currentView; } public MutableAttributeMap getAttributes() { return attributes; } public String getFlowExecutionUrl() { if (flowExecutionContext.getKey() == null) { throw new IllegalStateException( "Flow execution key not yet assigned; unable to build the flow execution url"); } else { String flowDefinitionId = flowExecutionContext.getDefinition().getId(); return externalContext.getFlowExecutionUrl(flowDefinitionId, flowExecutionContext.getKey().toString()); } } public void sendFlowExecutionRedirect() { if (flowExecutionContext.getKey() == null) { throw new IllegalStateException( "Flow execution key not yet assigned; unable to send a flow execution redirect request"); } else { externalContext.requestFlowExecutionRedirect(); } } // mutators for configuring the mock /** * Sets the active flow session of the executing flow associated with this request. This will influence * {@link #getActiveFlow()} and {@link #getCurrentState()}, as well as {@link #getFlowScope()} and * {@link #getFlashScope()}. */ public void setActiveSession(FlowSession flowSession) { getMockFlowExecutionContext().setActiveSession(flowSession); } /** * Sets the external context. */ public void setExternalContext(ExternalContext externalContext) { this.externalContext = externalContext; } /** * Sets the flow execution context. */ public void setFlowExecutionContext(FlowExecutionContext flowExecutionContext) { this.flowExecutionContext = flowExecutionContext; } /** * Set the current event being processed by this flow. * @param event the current event */ public void setCurrentEvent(Event event) { this.currentEvent = event; } /** * Set the current transition executing in this request context. * @param transition the current transition to set */ public void setCurrentTransition(Transition transition) { this.currentTransition = transition; } /** * Set the current view in this request context. * @param currentView the current view */ public void setCurrentView(View currentView) { this.currentView = currentView; } /** * Set a request context attribute. * @param attributeName the attribute name * @param attributeValue the attribute value */ public void setAttribute(String attributeName, Object attributeValue) { attributes.put(attributeName, attributeValue); } /** * Remove a request context attribute. * @param attributeName the attribute name */ public void removeAttribute(String attributeName) { attributes.remove(attributeName); } /** * Adds a request parameter to the configured external context. * @param parameterName the parameter name * @param parameterValue the parameter value */ public void putRequestParameter(String parameterName, String parameterValue) { getMockExternalContext().putRequestParameter(parameterName, parameterValue); } /** * Adds a multi-valued request parameter to the configured external context. * @param parameterName the parameter name * @param parameterValues the parameter values */ public void putRequestParameter(String parameterName, String[] parameterValues) { getMockExternalContext().putRequestParameter(parameterName, parameterValues); } /** * Puts a MultipartFile request parameter into the mock parameter map. * @param parameterName the parameter name * @param parameterValue the parameter value */ public void putRequestParameter(String parameterName, MultipartFile parameterValue) { getMockExternalContext().putRequestParameter(parameterName, parameterValue); } /** * Puts a multi-valued MultipartFile request parameter into the mock parameter map. * @param parameterName the parameter name * @param parameterValue the parameter value */ public void putRequestParameter(String parameterName, List parameterValue) { getMockExternalContext().putRequestParameter(parameterName, parameterValue); } // convenience accessors /** * Returns the root flow definition for this request context. Assumes a {@link Flow} implementation. */ public Flow getRootFlow() { return getMockFlowExecutionContext().getDefinitionInternal(); } /** * Returns the contained mutable context {@link AttributeMap attribute map} allowing setting of mock context * attributes. * @return the attribute map */ public MutableAttributeMap getAttributeMap() { return attributes; } /** * Returns the flow execution context as a {@link MockFlowExecutionContext}. */ public MockFlowExecutionContext getMockFlowExecutionContext() { return (MockFlowExecutionContext) flowExecutionContext; } /** * Returns the external context as a {@link MockExternalContext}. */ public MockExternalContext getMockExternalContext() { return (MockExternalContext) externalContext; } }