/*
* Copyright 2000-2004 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.
*/
package org.apache.jetspeed.rewriter;
import java.net.URL;
import java.util.Iterator;
import org.apache.jetspeed.rewriter.rules.Attribute;
import org.apache.jetspeed.rewriter.rules.Rule;
import org.apache.jetspeed.rewriter.rules.Ruleset;
import org.apache.jetspeed.rewriter.rules.Tag;
/**
* RuleBasedRewriter
*
* @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
* @version $Id: RulesetRewriterImpl.java,v 1.2 2005/02/08 19:08:39 rogerrut Exp $
*/
public class RulesetRewriterImpl extends BasicRewriter implements RulesetRewriter
{
private Ruleset ruleset = null;
private boolean removeComments = false;
public boolean shouldStripTag(String tagid)
{
if (null == ruleset)
{
return false;
}
Tag tag = ruleset.getTag(tagid.toUpperCase());
if (null == tag)
{
return false;
}
return tag.getStrip();
}
/* (non-Javadoc)
* @see org.apache.jetspeed.cps.rewriter.Rewriter#shouldRemoveTag(java.lang.String)
*/
public boolean shouldRemoveTag(String tagid)
{
if (null == ruleset)
{
return false;
}
Tag tag = ruleset.getTag(tagid.toUpperCase());
if (null == tag)
{
return false;
}
return tag.getRemove();
}
/* (non-Javadoc)
* @see org.apache.jetspeed.cps.rewriter.RulesetRewriter#setRuleset(org.apache.jetspeed.cps.rewriter.rules.Ruleset)
*/
public void setRuleset(Ruleset ruleset)
{
this.ruleset = ruleset;
}
/* (non-Javadoc)
* @see org.apache.jetspeed.cps.rewriter.RulesetRewriter#getRuleset()
*/
public Ruleset getRuleset()
{
return this.ruleset;
}
/* (non-Javadoc)
* @see org.apache.jetspeed.cps.rewriter.Rewriter#shouldRemoveComments()
*/
public boolean shouldRemoveComments()
{
if (null == ruleset)
{
return false;
}
return ruleset.getRemoveComments();
}
/* (non-Javadoc)
* @see org.apache.jetspeed.syndication.services.crawler.rewriter.Rewriter#convertTagEvent(java.lang.String, org.xml.sax.Attributes)
*/
public void enterConvertTagEvent(String tagid, MutableAttributes attributes)
{
// System.out.println("tagid = " + tagid);
if (null == ruleset)
{
return;
}
Tag tag = ruleset.getTag(tagid.toUpperCase());
if (null == tag)
{
return;
}
Iterator attribRules = tag.getAttributes().iterator();
while (attribRules.hasNext())
{
Attribute attribute = (Attribute)attribRules.next();
String name = attribute.getId();
String value = (String)attributes.getValue(name);
//String id = (String)attributes.getValue("name");
//System.out.println("id = " + id);
//System.out.println("value = " + value);
//System.out.println("name = " + name);
if (value != null) // && name.equalsIgnoreCase(attribute.getId()))
{
Rule rule = attribute.getRule();
if (null == rule)
{
continue;
}
if (!rule.shouldRewrite(value))
{
continue;
}
String rewritten = rewriteUrl(value, tag.getId(), name);
if (null != rewritten) // return null indicates "don't rewrite"
{
if (rule.getSuffix() != null)
{
rewritten = rewritten.concat(rule.getSuffix());
}
attributes.addAttribute(name, rewritten);
if (rule.getPopup())
{
attributes.addAttribute("TARGET", "_BLANK");
}
}
}
}
}
/*
* This callback is called by the ParserAdaptor implementation to write
* back all rewritten URLs to point to the proxy server.
* Given the targetURL, rewrites the link as a link back to the proxy server.
*
* @return the rewritten URL to the proxy server.
*
*/
public String rewriteUrl(
String url,
String tag,
String attribute)
{
String fullPath = "";
try
{
String baseUrl = super.getBaseUrl();
if (baseUrl != null)
{
URL full = new URL(new URL(baseUrl), url);
fullPath = full.toString();
}
else
{
return url; // leave as is
}
}
catch (Exception e)
{
System.err.println(e);
}
return fullPath;
}
}