// plasmaParserConfig.java
// -------------------------------------
// part of YACY
// (C) by Michael Peter Christen; mc@anomic.de
// first published on http://www.anomic.de
// Frankfurt, Germany, 2004
//
// This file ist contributed by Martin Thelian
//
// $LastChangedDate: 2006-02-20 23:57:42 +0100 (Mo, 20 Feb 2006) $
// $LastChangedRevision: 1715 $
// $LastChangedBy: theli $
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Using this software in any meaning (reading, learning, copying, compiling,
// running) means that you agree that the Author(s) is (are) not responsible
// for cost, loss of data or any harm that may be caused directly or indirectly
// by usage of this softare or this documentation. The usage of this software
// is on your own risk. The installation and usage (starting/running) of this
// software may allow other people or application to access your computer and
// any attached devices and is highly dependent on the configuration of the
// software which must be done by the user of the software; the author(s) is
// (are) also not responsible for proper configuration and usage of the
// software, even if provoked by documentation provided together with
// the software.
//
// Any changes to this file according to the GPL as documented in the file
// gpl.txt aside this file in the shipment you received can be done to the
// lines that follows this copyright notice here, but changes must not be
// done inside the copyright notive above. A re-distribution must contain
// the intact and unchanged copyright notice.
// Contributions and changes to the program code must be marked as such.
package de.anomic.plasma;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import de.anomic.plasma.parser.Parser;
import de.anomic.plasma.parser.ParserInfo;
import de.anomic.server.logging.serverLog;
import de.anomic.yacy.yacyURL;
public class plasmaParserConfig {
/**
* A list containing all enabled parsers and the mimeType that they can handle
* @see #loadEnabledParserList()
* @see #setEnabledParserList(Enumeration)
*/
final HashSet<String> enabledParserList = new HashSet<String>();
/**
* A list of file extensions that are supported by all enabled parsers
*/
final HashSet<String> supportedFileExt = new HashSet<String>();
/**
* Parsermode this configuration belongs to
*/
public String parserMode = null;
public plasmaParserConfig(String theParserMode) {
if (!plasmaParser.PARSER_MODE.contains(theParserMode)) {
throw new IllegalArgumentException("Unknown parser mode " + theParserMode);
}
this.parserMode = theParserMode;
}
public boolean supportedContent(yacyURL url, String mimeType) {
// TODO: we need some exceptions here to index URLs like this
// http://www.musicabona.com/respighi/12668/cd/index.html.fr
mimeType = plasmaParser.normalizeMimeType(mimeType);
if (
mimeType.equals("text/html") ||
mimeType.equals("application/xhtml+xml") ||
mimeType.equals("text/plain")
) {
return supportedMimeTypesContains(mimeType);
}
return supportedMimeTypesContains(mimeType) && supportedFileExt(url);
}
public boolean supportedMimeTypesContains(String mimeType) {
mimeType = plasmaParser.normalizeMimeType(mimeType);
synchronized (plasmaParser.supportedHTMLMimeTypes) {
if (plasmaParser.supportedHTMLMimeTypes.contains(mimeType)) return true;
}
synchronized (this.enabledParserList) {
return this.enabledParserList.contains(mimeType);
}
}
public boolean supportedFileExt(yacyURL url) {
if (url == null) throw new NullPointerException();
// getting the file path
String name = plasmaParser.getFileExt(url);
return supportedFileExtContains(name);
}
public boolean supportedFileExtContains(String fileExt) {
if (fileExt == null) return false;
fileExt = fileExt.trim().toLowerCase();
synchronized (plasmaParser.supportedHTMLFileExt) {
if (plasmaParser.supportedHTMLFileExt.contains(fileExt)) return true;
}
synchronized(this.supportedFileExt) {
return this.supportedFileExt.contains(fileExt);
}
}
public void initParseableMimeTypes(String enabledMimeTypes) {
HashSet<String> mimeTypes = null;
if ((enabledMimeTypes == null) || (enabledMimeTypes.length() == 0)) {
mimeTypes = new HashSet<String>();
} else {
String[] enabledMimeTypeList = enabledMimeTypes.split(",");
mimeTypes = new HashSet<String>(enabledMimeTypeList.length);
for (int i = 0; i < enabledMimeTypeList.length; i++) mimeTypes.add(enabledMimeTypeList[i].toLowerCase().trim());
}
setEnabledParserList(mimeTypes);
}
public void enableAllParsers() {
Set<String> availableMimeTypes = plasmaParser.availableParserList.keySet();
setEnabledParserList(availableMimeTypes);
}
public String[] setEnabledParserList(Set<String> mimeTypeSet) {
HashSet<String> newEnabledParsers = new HashSet<String>();
HashSet<String> newSupportedFileExt = new HashSet<String>();
if (mimeTypeSet != null) {
Iterator<String> mimeTypes = mimeTypeSet.iterator();
while (mimeTypes.hasNext()) {
String mimeType = (String) mimeTypes.next();
if (plasmaParser.availableParserList.containsKey(mimeType)) {
Parser theParser = null;
try {
// getting the parser
theParser = plasmaParser.makeParser(((ParserInfo)plasmaParser.availableParserList.get(mimeType)).parserClassName);
// getting a list of mimeTypes that the parser supports
Hashtable<String, String> parserSupportsMimeTypes = theParser.getSupportedMimeTypes();
if (parserSupportsMimeTypes != null) {
Object supportedExtensions = parserSupportsMimeTypes.get(mimeType);
if ((supportedExtensions != null) &&
(supportedExtensions instanceof String) &&
(((String)supportedExtensions).length() > 0)) {
String[] extArray = ((String)supportedExtensions).split(",");
newSupportedFileExt.addAll(Arrays.asList(extArray));
}
}
newEnabledParsers.add(mimeType);
} catch (Exception e) {
serverLog.logSevere("PARSER", "error in setEnabledParserList", e);
} finally {
if (theParser != null)
theParser = null; // destroy object
}
}
}
}
synchronized (this.enabledParserList) {
this.enabledParserList.clear();
this.enabledParserList.addAll(newEnabledParsers);
}
synchronized (this.supportedFileExt) {
this.supportedFileExt.clear();
this.supportedFileExt.addAll(newSupportedFileExt);
}
return (String[])newEnabledParsers.toArray(new String[newEnabledParsers.size()]);
}
@SuppressWarnings("unchecked")
public HashSet<String> getEnabledParserList() {
synchronized (this.enabledParserList) {
return (HashSet<String>) this.enabledParserList.clone();
}
}
}