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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
/* $Id$ */
package org.apache.fop.accessibility.fo;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.custommonkey.xmlunit.Diff;
import org.junit.Test;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
import org.apache.fop.accessibility.StructureTree2SAXEventAdapter;
import org.apache.fop.accessibility.StructureTreeEventHandler;
import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.fo.FODocumentParser;
import org.apache.fop.fo.FODocumentParser.FOEventHandlerFactory;
import org.apache.fop.fo.FOEventHandler;
import org.apache.fop.fo.LoadingException;
import org.apache.fop.fotreetest.DummyFOEventHandler;
public class FO2StructureTreeConverterTestCase {
private interface FOLoader {
InputStream getFoInputStream();
}
private static final String STRUCTURE_TREE_SEQUENCE_NAME = "structure-tree-sequence";
private FOLoader foLoader;
@Test
public void testCompleteDocument() throws Exception {
foLoader = new FOLoader() {
public InputStream getFoInputStream() {
return getResource("/org/apache/fop/fo/complete_document.fo");
}
};
testConverter();
}
@Test
public void testTableFooters() throws Exception {
foLoader = new FOLoader() {
public InputStream getFoInputStream() {
return getResource("table-footers.fo");
}
};
testConverter();
}
@Test
public void testCompleteContentWrappedInTableFooter() throws Exception {
Source xslt = new StreamSource(getResource("wrapCompleteDocumentInTableFooter.xsl"));
Transformer transformer = createTransformer(xslt);
InputStream originalFO = getResource("/org/apache/fop/fo/complete_document.fo");
ByteArrayOutputStream transformedFoOutput = new ByteArrayOutputStream();
transformer.transform(new StreamSource(originalFO), new StreamResult(transformedFoOutput));
final byte[] transformedFoOutputBytes = transformedFoOutput.toByteArray();
foLoader = new FOLoader() {
public InputStream getFoInputStream() {
return new ByteArrayInputStream(transformedFoOutputBytes);
}
};
testConverter();
}
private Transformer createTransformer(Source xslt) throws TransformerFactoryConfigurationError,
TransformerConfigurationException {
TransformerFactory transformerFactory = TransformerFactory.newInstance();
return transformerFactory.newTransformer(xslt);
}
private static InputStream getResource(String name) {
return FO2StructureTreeConverterTestCase.class.getResourceAsStream(name);
}
private void testConverter() throws Exception {
DOMResult expectedStructureTree = loadExpectedStructureTree();
DOMResult actualStructureTree = buildActualStructureTree();
final Diff diff = createDiff(expectedStructureTree, actualStructureTree);
assertTrue(diff.toString(), diff.identical());
}
private DOMResult loadExpectedStructureTree() {
DOMResult expectedStructureTree = new DOMResult();
InputStream xslt = getResource("fo2StructureTree.xsl");
runXSLT(xslt, foLoader.getFoInputStream(), expectedStructureTree);
return expectedStructureTree;
}
private static void runXSLT(InputStream xslt, InputStream doc, Result result) {
Source fo = new StreamSource(doc);
try {
Transformer transformer = TransformerFactory.newInstance()
.newTransformer(new StreamSource(xslt));
transformer.transform(fo, result);
} catch (TransformerConfigurationException e) {
throw new RuntimeException(e);
} catch (TransformerException e) {
throw new RuntimeException(e);
} finally {
closeStream(xslt);
closeStream(doc);
}
}
private static void closeStream(InputStream stream) {
try {
stream.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private DOMResult buildActualStructureTree() throws Exception {
DOMResult actualStructureTree = new DOMResult();
createStructureTreeFromDocument(foLoader.getFoInputStream(), actualStructureTree);
return actualStructureTree;
}
private static void createStructureTreeFromDocument(InputStream foInputStream,
Result result) throws Exception {
TransformerHandler tHandler = createTransformerHandler(result);
startStructureTreeSequence(tHandler);
StructureTreeEventHandler structureTreeEventHandler
= StructureTree2SAXEventAdapter.newInstance(tHandler);
FODocumentParser documentParser = createDocumentParser(structureTreeEventHandler);
FOUserAgent userAgent = createFOUserAgent(documentParser);
parseDocument(foInputStream, documentParser, userAgent);
endStructureTreeSequence(tHandler);
}
private static TransformerHandler createTransformerHandler(Result domResult)
throws TransformerConfigurationException, TransformerFactoryConfigurationError {
SAXTransformerFactory factory = (SAXTransformerFactory) SAXTransformerFactory.newInstance();
TransformerHandler transformerHandler = factory.newTransformerHandler();
transformerHandler.setResult(domResult);
return transformerHandler;
}
private static void startStructureTreeSequence(TransformerHandler tHandler) throws SAXException {
tHandler.startDocument();
tHandler.startElement("", STRUCTURE_TREE_SEQUENCE_NAME, STRUCTURE_TREE_SEQUENCE_NAME,
new AttributesImpl());
}
private static FODocumentParser createDocumentParser(
final StructureTreeEventHandler structureTreeEventHandler) {
return FODocumentParser.newInstance(new FOEventHandlerFactory() {
public FOEventHandler newFOEventHandler(FOUserAgent foUserAgent) {
return new FO2StructureTreeConverter(structureTreeEventHandler,
new DummyFOEventHandler(foUserAgent));
}
});
}
private static FOUserAgent createFOUserAgent(FODocumentParser documentParser) {
FOUserAgent userAgent = documentParser.createFOUserAgent();
userAgent.setAccessibility(true);
return userAgent;
}
private static void parseDocument(InputStream foInputStream, FODocumentParser documentParser,
FOUserAgent userAgent) throws FOPException, LoadingException {
try {
documentParser.parse(foInputStream, userAgent);
} finally {
closeStream(foInputStream);
}
}
private static void endStructureTreeSequence(TransformerHandler tHandler) throws SAXException {
tHandler.endElement("", STRUCTURE_TREE_SEQUENCE_NAME, STRUCTURE_TREE_SEQUENCE_NAME);
tHandler.endDocument();
}
private static Diff createDiff(DOMResult expected, DOMResult actual) {
Diff diff = new Diff(getDocument(expected), getDocument(actual));
return diff;
}
private static Document getDocument(DOMResult result) {
return (Document) result.getNode();
}
}
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