/*
 * 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 javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;

import org.springframework.core.MethodParameter;
import org.springframework.ws.context.MessageContext;
import org.springframework.ws.server.endpoint.annotation.RequestPayload;

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

import static org.junit.Assert.*;

/** @author Arjen Poutsma */
@SuppressWarnings("Since15")
public class StaxPayloadMethodArgumentResolverTest extends AbstractMethodArgumentResolverTestCase {

	private StaxPayloadMethodArgumentResolver resolver;

	private MethodParameter streamParameter;

	private MethodParameter eventParameter;

	private MethodParameter invalidParameter;

	@Before
	public void setUp() throws Exception {
		resolver = new StaxPayloadMethodArgumentResolver();
		streamParameter = new MethodParameter(getClass().getMethod("streamReader", XMLStreamReader.class), 0);
		eventParameter = new MethodParameter(getClass().getMethod("eventReader", XMLEventReader.class), 0);
		invalidParameter = new MethodParameter(getClass().getMethod("invalid", XMLStreamReader.class), 0);
	}

	@Test
	public void supportsParameter() {
		assertTrue("resolver does not support XMLStreamReader", resolver.supportsParameter(streamParameter));
		assertTrue("resolver does not support XMLEventReader", resolver.supportsParameter(eventParameter));
		assertFalse("resolver supports invalid parameter", resolver.supportsParameter(invalidParameter));
	}

	@Test
	public void resolveStreamReaderSaaj() throws Exception {
		MessageContext messageContext = createSaajMessageContext();

		Object result = resolver.resolveArgument(messageContext, streamParameter);

		testStreamReader(result);
	}

	@Test
	public void resolveStreamReaderAxiomCaching() throws Exception {
		MessageContext messageContext = createCachingAxiomMessageContext();

		Object result = resolver.resolveArgument(messageContext, streamParameter);

		testStreamReader(result);
	}

	@Test
	public void resolveStreamReaderAxiomNonCaching() throws Exception {
		MessageContext messageContext = createNonCachingAxiomMessageContext();

		Object result = resolver.resolveArgument(messageContext, streamParameter);

		testStreamReader(result);
	}

	@Test
	public void resolveStreamReaderStream() throws Exception {
		MessageContext messageContext = createMockMessageContext();

		Object result = resolver.resolveArgument(messageContext, streamParameter);

		testStreamReader(result);
	}

	@Test
	public void resolveEventReaderSaaj() throws Exception {
		MessageContext messageContext = createSaajMessageContext();

		Object result = resolver.resolveArgument(messageContext, eventParameter);

		testEventReader(result);
	}

	@Test
	public void resolveEventReaderAxiomCaching() throws Exception {
		MessageContext messageContext = createCachingAxiomMessageContext();

		Object result = resolver.resolveArgument(messageContext, eventParameter);

		testEventReader(result);
	}

	@Test
	public void resolveEventReaderAxiomNonCaching() throws Exception {
		MessageContext messageContext = createNonCachingAxiomMessageContext();

		Object result = resolver.resolveArgument(messageContext, eventParameter);

		testEventReader(result);
	}

	@Test
	public void resolveEventReaderStream() throws Exception {
		MessageContext messageContext = createMockMessageContext();

		Object result = resolver.resolveArgument(messageContext, eventParameter);

		testEventReader(result);
	}


	private void testStreamReader(Object result) throws XMLStreamException {
		assertTrue("resolver does not return XMLStreamReader", result instanceof XMLStreamReader);
		XMLStreamReader streamReader = (XMLStreamReader) result;
		assertTrue("streamReader has no next element", streamReader.hasNext());
		assertEquals(XMLStreamConstants.START_ELEMENT, streamReader.nextTag());
		assertEquals("Invalid namespace", NAMESPACE_URI, streamReader.getNamespaceURI());
		assertEquals("Invalid local name", LOCAL_NAME, streamReader.getLocalName());
	}

	private void testEventReader(Object result) throws XMLStreamException {
		assertTrue("resolver does not return XMLEventReader", result instanceof XMLEventReader);
		XMLEventReader eventReader = (XMLEventReader) result;
		assertTrue("eventReader has no next element", eventReader.hasNext());
		XMLEvent event = eventReader.nextTag();
		assertEquals(XMLStreamConstants.START_ELEMENT, event.getEventType());
		StartElement startElement = (StartElement) event;
		assertEquals("Invalid namespace", NAMESPACE_URI, startElement.getName().getNamespaceURI());
		assertEquals("Invalid local name", LOCAL_NAME, startElement.getName().getLocalPart());
	}


	public void invalid(XMLStreamReader streamReader) {
	}

	public void streamReader(@RequestPayload XMLStreamReader streamReader) {
	}

	public void eventReader(@RequestPayload XMLEventReader streamReader) {
	}
}