/*
 * Copyright 2005-2010 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.server.endpoint.adapter.method;

import java.lang.reflect.Type;
import javax.xml.transform.Result;
import javax.xml.transform.Source;

import org.springframework.core.MethodParameter;
import org.springframework.oxm.GenericMarshaller;
import org.springframework.oxm.GenericUnmarshaller;
import org.springframework.ws.context.MessageContext;
import org.springframework.ws.server.endpoint.annotation.RequestPayload;
import org.springframework.ws.server.endpoint.annotation.ResponsePayload;

import org.junit.Before;
import org.junit.Test;

import static org.easymock.EasyMock.*;
import static org.junit.Assert.*;

public class MarshallingPayloadMethodProcessorTest extends AbstractMethodArgumentResolverTestCase {

	private MarshallingPayloadMethodProcessor processor;

	private GenericMarshaller marshaller;

	private GenericUnmarshaller unmarshaller;

	private MethodParameter supportedParameter;

	private MethodParameter supportedReturnType;

	@Before
	public void setUp() throws Exception {
		marshaller = createMock("marshaller", GenericMarshaller.class);
		unmarshaller = createMock("unmarshaller", GenericUnmarshaller.class);
		processor = new MarshallingPayloadMethodProcessor(marshaller, unmarshaller);
		supportedParameter = new MethodParameter(getClass().getMethod("method", MyObject.class), 0);
		supportedReturnType = new MethodParameter(getClass().getMethod("method", MyObject.class), -1);
	}

	@Test
	public void supportsParameterSupported() {
		expect(unmarshaller.supports(isA(Type.class))).andReturn(true);

		replay(marshaller, unmarshaller);

		assertTrue("processor does not support supported parameter", processor.supportsParameter(supportedParameter));

		verify(marshaller, unmarshaller);
	}

	@Test
	public void supportsParameterUnsupported() {
		expect(unmarshaller.supports(isA(Type.class))).andReturn(false);

		replay(marshaller, unmarshaller);

		assertFalse("processor supports unsupported parameter", processor.supportsParameter(supportedParameter));

		verify(marshaller, unmarshaller);
	}

	@Test
	public void supportsParameterNoUnmarshallerSupported() {
		processor = new MarshallingPayloadMethodProcessor();
		processor.setMarshaller(marshaller);

		replay(marshaller, unmarshaller);

		assertFalse("processor supports parameter with no unmarshaller set",
				processor.supportsParameter(supportedParameter));

		verify(marshaller, unmarshaller);
	}

	@Test
	public void supportsReturnTypeSupported() {
		expect(marshaller.supports(isA(Type.class))).andReturn(true);

		replay(marshaller, unmarshaller);

		assertTrue("processor does not support supported return type", processor.supportsReturnType(supportedReturnType));

		verify(marshaller, unmarshaller);
	}

	@Test
	public void supportsReturnTypeUnsupported() {
		expect(marshaller.supports(isA(Type.class))).andReturn(false);

		replay(marshaller, unmarshaller);

		assertFalse("processor supports unsupported parameter", processor.supportsReturnType(supportedReturnType));

		verify(marshaller, unmarshaller);
	}

	@Test
	public void supportsReturnTypeNoMarshaller() {
		processor = new MarshallingPayloadMethodProcessor();
		processor.setUnmarshaller(unmarshaller);

		replay(marshaller, unmarshaller);

		assertFalse("processor supports return type with no marshaller set",
				processor.supportsReturnType(supportedReturnType));

		verify(marshaller, unmarshaller);
	}


	@Test
	public void resolveArgument() throws Exception {
		MyObject expected = new MyObject();

		expect(unmarshaller.unmarshal(isA(Source.class))).andReturn(expected);

		replay(marshaller, unmarshaller);
		MessageContext messageContext = createMockMessageContext();

		Object result = processor.resolveArgument(messageContext, supportedParameter);
		assertEquals("Invalid return argument", expected, result);

		verify(marshaller, unmarshaller);
	}

	@Test(expected = IllegalStateException.class)
	public void resolveArgumentNoUnmarshaller() throws Exception {
		processor = new MarshallingPayloadMethodProcessor();
		processor.setMarshaller(marshaller);

		replay(marshaller, unmarshaller);
		MessageContext messageContext = createMockMessageContext();

		processor.resolveArgument(messageContext, supportedParameter);
	}

	@Test
	public void handleReturnValue() throws Exception {
		MyObject returnValue = new MyObject();

		marshaller.marshal(eq(returnValue), isA(Result.class));

		replay(marshaller, unmarshaller);
		MessageContext messageContext = createMockMessageContext();

		processor.handleReturnValue(messageContext, supportedReturnType, returnValue);

		verify(marshaller, unmarshaller);
	}

	@Test(expected = IllegalStateException.class)
	public void handleReturnValueNoMarshaller() throws Exception {
		processor = new MarshallingPayloadMethodProcessor();
		processor.setUnmarshaller(unmarshaller);

		MyObject returnValue = new MyObject();

		replay(marshaller, unmarshaller);
		MessageContext messageContext = createMockMessageContext();

		processor.handleReturnValue(messageContext, supportedReturnType, returnValue);
	}

	@ResponsePayload
	public MyObject method(@RequestPayload MyObject object) {
		return object;
	}

	public static class MyObject {

	}
}