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/*****************************************************************************
* Java Plug-in Framework (JPF)
* Copyright (C) 2004-2007 Dmitry Olshansky
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*****************************************************************************/
package org.java.plugin.registry.xml;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.net.URL;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.java.plugin.util.IoUtil;
import org.xml.sax.EntityResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
/**
* @version $Id: ManifestParser.java,v 1.4 2007/03/03 17:16:26 ddimon Exp $
*/
final class ManifestParser {
static Log log = LogFactory.getLog(ManifestParser.class);
static final String PLUGIN_DTD_1_0 = loadPluginDtd("1_0"); //$NON-NLS-1$
private static String loadPluginDtd(final String version) {
try {
Reader in = new InputStreamReader(
PluginRegistryImpl.class.getResourceAsStream("plugin_" //$NON-NLS-1$
+ version + ".dtd"), "UTF-8"); //$NON-NLS-1$ //$NON-NLS-2$
try {
StringBuilder sBuf = new StringBuilder();
char[] cBuf = new char[64];
int read;
while ((read = in.read(cBuf)) != -1) {
sBuf.append(cBuf, 0, read);
}
return sBuf.toString();
} finally {
in.close();
}
} catch (IOException ioe) {
log.error("can't read plug-in DTD file of version " + version, ioe); //$NON-NLS-1$
}
return null;
}
private static EntityResolver getDtdEntityResolver() {
return new EntityResolver() {
public InputSource resolveEntity(final String publicId,
final String systemId) {
if (publicId == null) {
log.debug("can't resolve entity, public ID is NULL, systemId=" + systemId); //$NON-NLS-1$
return null;
}
if (PLUGIN_DTD_1_0 == null) {
return null;
}
if (publicId.equals("-//JPF//Java Plug-in Manifest 1.0") //$NON-NLS-1$
|| publicId.equals("-//JPF//Java Plug-in Manifest 0.7") //$NON-NLS-1$
|| publicId.equals("-//JPF//Java Plug-in Manifest 0.6") //$NON-NLS-1$
|| publicId.equals("-//JPF//Java Plug-in Manifest 0.5") //$NON-NLS-1$
|| publicId.equals("-//JPF//Java Plug-in Manifest 0.4") //$NON-NLS-1$
|| publicId.equals("-//JPF//Java Plug-in Manifest 0.3") //$NON-NLS-1$
|| publicId.equals("-//JPF//Java Plug-in Manifest 0.2")) { //$NON-NLS-1$
if (log.isDebugEnabled()) {
log.debug("entity resolved to plug-in manifest DTD, publicId=" //$NON-NLS-1$
+ publicId + ", systemId=" + systemId); //$NON-NLS-1$
}
return new InputSource(new StringReader(PLUGIN_DTD_1_0));
}
if (log.isDebugEnabled()) {
log.debug("entity not resolved, publicId=" //$NON-NLS-1$
+ publicId + ", systemId=" + systemId); //$NON-NLS-1$
}
return null;
}
};
}
private final SAXParserFactory parserFactory;
private final EntityResolver entityResolver;
ManifestParser(final boolean isValidating) {
parserFactory = SAXParserFactory.newInstance();
parserFactory.setValidating(isValidating);
entityResolver = isValidating ? getDtdEntityResolver() : null;
log.info("got SAX parser factory - " + parserFactory); //$NON-NLS-1$
}
ModelPluginManifest parseManifest(final URL url)
throws ParserConfigurationException, SAXException, IOException {
ManifestHandler handler =
new ManifestHandler(entityResolver);
//InputStream strm = url.openStream();
InputStream strm = IoUtil.getResourceInputStream(url);
try {
parserFactory.newSAXParser().parse(strm, handler);
} finally {
strm.close();
}
ModelPluginManifest result = handler.getResult();
result.setLocation(url);
return result;
}
ModelManifestInfo parseManifestInfo(final URL url)
throws ParserConfigurationException, SAXException, IOException {
ManifestInfoHandler handler =
new ManifestInfoHandler(entityResolver);
//InputStream strm = url.openStream();
InputStream strm = IoUtil.getResourceInputStream(url);
try {
parserFactory.newSAXParser().parse(strm, handler);
} finally {
strm.close();
}
return handler.getResult();
}
}
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