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/*
* Copyright 2005-2006 The Apache Software Foundation.
*
* 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.
*/
/* $Id$ */
package org.apache.fop;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.OutputStream;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.URIResolver;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXResult;
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.apache.commons.io.IOUtils;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.fop.apps.FOPException;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.MimeConstants;
import org.apache.fop.render.xml.XMLRenderer;
import org.apache.xpath.XPathAPI;
import org.apache.xpath.objects.XObject;
import org.w3c.dom.Document;
/**
* Tests URI resolution facilities.
*/
public class URIResolutionTestCase extends AbstractFOPTestCase {
// configure fopFactory as desired
private FopFactory fopFactory = FopFactory.newInstance();
private SAXTransformerFactory tfactory
= (SAXTransformerFactory)SAXTransformerFactory.newInstance();
private File backupDir = new File(getBaseDir(), "build/test-results");
/** @see junit.framework.TestCase#TestCase(String) */
public URIResolutionTestCase(String name) {
super(name);
}
/**
* Test custom URI resolution with a hand-written URIResolver.
* @throws Exception if anything fails
*/
public void testFO1a() throws Exception {
innerTestFO1(false);
}
/**
* Test custom URI resolution with a hand-written URIResolver.
* @throws Exception if anything fails
*/
public void testFO1b() throws Exception {
innerTestFO1(true);
}
private void innerTestFO1(boolean withStream) throws Exception {
FOUserAgent ua = fopFactory.newFOUserAgent();
//Reset the image caches to force URI resolution!
ua.getFactory().getImageFactory().clearCaches();
File foFile = new File(getBaseDir(), "test/xml/uri-resolution1.fo");
MyURIResolver resolver = new MyURIResolver(withStream);
ua.setURIResolver(resolver);
ua.setBaseURL(foFile.getParentFile().toURL().toString());
Document doc = createAreaTree(foFile, ua);
//Check how many times the resolver was consulted
assertEquals("Expected resolver to do 1 successful URI resolution",
1, resolver.successCount);
assertEquals("Expected resolver to do 0 failed URI resolution",
0, resolver.failureCount);
//Additional XPath checking on the area tree
assertEquals("viewport for external-graphic is missing",
"true", evalXPath(doc, "boolean(//flow/block[1]/lineArea/viewport)"));
assertEquals("46080", evalXPath(doc, "//flow/block[1]/lineArea/viewport/@ipd"));
assertEquals("46080", evalXPath(doc, "//flow/block[1]/lineArea/viewport/@bpd"));
}
/**
* Test custom URI resolution with a hand-written URIResolver.
* @throws Exception if anything fails
*/
public void DISABLEDtestFO2() throws Exception {
//TODO This will only work when we can do URI resolution inside Batik!
File foFile = new File(getBaseDir(), "test/xml/uri-resolution2.fo");
FOUserAgent ua = fopFactory.newFOUserAgent();
MyURIResolver resolver = new MyURIResolver(false);
ua.setURIResolver(resolver);
ua.setBaseURL(foFile.getParentFile().toURL().toString());
ByteArrayOutputStream baout = new ByteArrayOutputStream();
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, ua, baout);
Transformer transformer = tfactory.newTransformer(); //Identity transf.
Source src = new StreamSource(foFile);
Result res = new SAXResult(fop.getDefaultHandler());
transformer.transform(src, res);
OutputStream out = new java.io.FileOutputStream(
new File(backupDir, foFile.getName() + ".pdf"));
try {
baout.writeTo(out);
} finally {
IOUtils.closeQuietly(out);
}
//Check how many times the resolver was consulted
assertEquals("Expected resolver to do 1 successful URI resolution",
1, resolver.successCount);
assertEquals("Expected resolver to do 0 failed URI resolutions",
0, resolver.failureCount);
//Test using PDF as the area tree doesn't invoke Batik so we could check
//if the resolver is actually passed to Batik by FOP
assertTrue("Generated PDF has zero length", baout.size() > 0);
}
private Document createAreaTree(File fo, FOUserAgent ua)
throws TransformerException, FOPException {
DOMResult domres = new DOMResult();
//Setup Transformer to convert the area tree to a DOM
TransformerHandler athandler = tfactory.newTransformerHandler();
athandler.setResult(domres);
XMLRenderer atrenderer = new XMLRenderer();
atrenderer.setUserAgent(ua);
atrenderer.setContentHandler(athandler);
ua.setRendererOverride(atrenderer);
Fop fop = fopFactory.newFop(ua);
Transformer transformer = tfactory.newTransformer(); //Identity transf.
Source src = new StreamSource(fo);
Result res = new SAXResult(fop.getDefaultHandler());
transformer.transform(src, res);
Document doc = (Document)domres.getNode();
saveAreaTreeXML(doc, new File(backupDir, fo.getName() + ".at.xml"));
return doc;
}
private String evalXPath(Document doc, String xpath) {
XObject res;
try {
res = XPathAPI.eval(doc, xpath);
} catch (TransformerException e) {
throw new RuntimeException("XPath evaluation failed: " + e.getMessage());
}
return res.str();
}
/**
* Save the area tree XML for later inspection.
* @param doc area tree as a DOM document
* @param target target file
* @throws TransformerException if a problem occurs during serialization
*/
protected void saveAreaTreeXML(Document doc, File target) throws TransformerException {
Transformer transformer = tfactory.newTransformer();
Source src = new DOMSource(doc);
Result res = new StreamResult(target);
transformer.transform(src, res);
}
private class MyURIResolver implements URIResolver {
private static final String PREFIX = "funky:";
private boolean withStream;
private int successCount = 0;
private int failureCount = 0;
public MyURIResolver(boolean withStream) {
this.withStream = withStream;
}
/**
* @see javax.xml.transform.URIResolver#resolve(java.lang.String, java.lang.String)
*/
public Source resolve(String href, String base) throws TransformerException {
if (href.startsWith(PREFIX)) {
String name = href.substring(PREFIX.length());
if ("myimage123".equals(name)) {
File image = new File(getBaseDir(), "test/resources/images/bgimg300dpi.jpg");
Source src;
if (withStream) {
try {
src = new StreamSource(new java.io.FileInputStream(image));
} catch (FileNotFoundException e) {
throw new TransformerException(e.getMessage(), e);
}
} else {
src = new StreamSource(image);
}
successCount++;
return src;
} else {
failureCount++;
throw new TransformerException("funky image not found");
}
} else {
failureCount++;
return null;
}
}
}
}
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