/*
 * Copyright 2002-2014 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.ws.soap.server.endpoint.mapping;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.springframework.ws.context.MessageContext;
import org.springframework.ws.server.EndpointInterceptor;
import org.springframework.ws.server.EndpointInvocationChain;
import org.springframework.ws.server.endpoint.mapping.AbstractAnnotationMethodEndpointMapping;
import org.springframework.ws.soap.SoapMessage;
import org.springframework.ws.soap.server.SoapEndpointInvocationChain;
import org.springframework.ws.soap.server.SoapEndpointMapping;
import org.springframework.ws.soap.server.endpoint.annotation.SoapAction;
import org.springframework.ws.soap.server.endpoint.annotation.SoapActions;

/**
 * Implementation of the {@link org.springframework.ws.server.EndpointMapping} interface that uses the {@link
 * SoapAction} annotation to map methods to the request SOAPAction header.
 *
 * <p>Endpoints typically have the following form:
 * <pre>
 * @Endpoint
 * public class MyEndpoint{
 *	  @SoapAction("http://springframework.org/spring-ws/SoapAction")
 *	  public Source doSomethingWithRequest() {
 *		 ...
 *	  }
 * }
 * </pre>
 *
 * @author Arjen Poutsma
 * @since 1.0.0
 */
public class SoapActionAnnotationMethodEndpointMapping extends AbstractAnnotationMethodEndpointMapping<String>
		implements SoapEndpointMapping {

	private String[] actorsOrRoles;

	private boolean isUltimateReceiver = true;

	@Override
	public final void setActorOrRole(String actorOrRole) {
		Assert.notNull(actorOrRole, "actorOrRole must not be null");
		actorsOrRoles = new String[]{actorOrRole};
	}

	@Override
	public final void setActorsOrRoles(String[] actorsOrRoles) {
		Assert.notEmpty(actorsOrRoles, "actorsOrRoles must not be empty");
		this.actorsOrRoles = actorsOrRoles;
	}

	@Override
	public final void setUltimateReceiver(boolean ultimateReceiver) {
		isUltimateReceiver = ultimateReceiver;
	}

	/**
	 * Creates a new {@code SoapEndpointInvocationChain} based on the given endpoint, and the set interceptors, and
	 * actors/roles.
	 *
	 * @param endpoint	   the endpoint
	 * @param interceptors the endpoint interceptors
	 * @return the created invocation chain
	 * @see #setInterceptors(org.springframework.ws.server.EndpointInterceptor[])
	 * @see #setActorsOrRoles(String[])
	 */
	@Override
	protected final EndpointInvocationChain createEndpointInvocationChain(MessageContext messageContext,
																		  Object endpoint,
																		  EndpointInterceptor[] interceptors) {
		return new SoapEndpointInvocationChain(endpoint, interceptors, actorsOrRoles, isUltimateReceiver);
	}

	@Override
	protected String getLookupKeyForMessage(MessageContext messageContext) throws Exception {
		if (messageContext.getRequest() instanceof SoapMessage) {
			SoapMessage request = (SoapMessage) messageContext.getRequest();
			String soapAction = request.getSoapAction();
			if (StringUtils.hasLength(soapAction) && soapAction.charAt(0) == '"' &&
					soapAction.charAt(soapAction.length() - 1) == '"') {
				return soapAction.substring(1, soapAction.length() - 1);
			}
			else {
				return soapAction;
			}
		}
		else {
			return null;
		}
	}

	@Override
	protected String getLookupKeyForMethod(Method method) {
		SoapAction soapAction = AnnotationUtils.findAnnotation(method, SoapAction.class);
		return soapAction != null ? soapAction.value() : null;
	}

	@Override
	protected List<String> getLookupKeysForMethod(Method method) {
		List<String> result = new ArrayList<String>();

		SoapActions soapActions = AnnotationUtils.findAnnotation(method,
				SoapActions.class);
		if (soapActions != null) {
			for (SoapAction soapAction : soapActions.value()) {
				result.add(soapAction.value());
			}
		}
		else {
			SoapAction soapAction = AnnotationUtils.findAnnotation(method, SoapAction.class);
			if (soapAction != null) {
				result.add(soapAction.value());
			}
		}
		return result;
	}
}