/*
* Copyright 1999-2004 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.cocoon.components.url;
import org.apache.batik.util.AbstractParsedURLProtocolHandler;
import org.apache.batik.util.ParsedURL;
import org.apache.batik.util.ParsedURLData;
import org.apache.cocoon.environment.Context;
import java.net.MalformedURLException;
/**
* Provide an extension to Batik to handle the "context:" protocol. This class
* assumes it will live in a separate classloader as the Context is set statically.
* Batik uses the Jar file Services extension, so the class is instantiated in
* an uncontrolled manner (as far as Cocoon is concerned).
*
* @author <a href="mailto:bloritsch@apache.org">Berin Loritsch</a>
* @version CVS $Id: ParsedContextURLProtocolHandler.java,v 1.4 2004/03/05 13:01:45 bdelacretaz Exp $
*/
public class ParsedContextURLProtocolHandler extends AbstractParsedURLProtocolHandler {
private static Context context = null;
/**
* Set the ServletContext for this protocol. If it does not exist, you will
* get NullPointerExceptions!
*/
public static final void setContext(final Context newContext) {
if (ParsedContextURLProtocolHandler.context == null) {
ParsedContextURLProtocolHandler.context = newContext;
}
}
/**
* Create a new instance, this doesn't do much beyond register the type of
* protocol we handle.
*/
public ParsedContextURLProtocolHandler() {
super("context");
}
/**
* Getbase.getPath() the ParsedURLData for the context. Absolute URIs are specified like
* "context://".
*/
public ParsedURLData parseURL(String uri) {
ParsedURLData urldata = null;
try {
String path = uri.substring("context:/".length());
urldata = new ParsedURLData(ParsedContextURLProtocolHandler.context.getResource(path));
} catch (MalformedURLException mue) {
StringBuffer baseFile = new StringBuffer(ParsedContextURLProtocolHandler
.context.getRealPath("/"));
if (!baseFile.toString().endsWith("/")) {
baseFile.append("/");
}
baseFile.append(baseFile);
baseFile.append(uri.substring("context://".length()));
urldata = new ParsedURLData();
urldata.protocol = "file";
urldata.path = baseFile.toString();
}
if ("file".equals(urldata.protocol)) {
urldata.host = null;
urldata.port = -1;
} else if (null == urldata.host) {
urldata.port = -1;
} else if (urldata.port < 0) {
urldata.host = null;
}
return urldata;
}
/**
* The build the relative URL. Relative URIs are specified like "context:".
*/
public ParsedURLData parseURL(ParsedURL base, String uri) {
StringBuffer newURI = new StringBuffer("context://");
newURI.append(base.getPath());
if (!newURI.toString().endsWith("/")) {
newURI.append("/");
}
newURI.append(uri.substring("context:".length()));
return this.parseURL(newURI.toString());
}
}