Mega Code Archive
Add two URI path segments
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//
// Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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.
//
/**
* URI Holder. This class assists with the decoding and encoding or HTTP URI's.
* It differs from the java.net.URL class as it does not provide communications
* ability, but it does assist with query string formatting.
* <P>
* UTF-8 encoding is used by default for % encoded characters. This may be
* overridden with the org.mortbay.util.URI.charset system property.
*
* @see UrlEncoded
* @author Greg Wilkins (gregw)
*/
public class Utils {
public static final String SLASH = "/";
/**
* Add two URI path segments. Handles null and empty paths, path and query
* params (eg ?a=b or ;JSESSIONID=xxx) and avoids duplicate '/'
*
* @param p1
* URI path segment
* @param p2
* URI path segment
* @return Legally combined path segments.
*/
public static String addPaths(String p1, String p2) {
if (p1 == null || p1.length() == 0) {
if (p1 != null && p2 == null)
return p1;
return p2;
}
if (p2 == null || p2.length() == 0)
return p1;
int split = p1.indexOf(';');
if (split < 0)
split = p1.indexOf('?');
if (split == 0)
return p2 + p1;
if (split < 0)
split = p1.length();
StringBuffer buf = new StringBuffer(p1.length() + p2.length() + 2);
buf.append(p1);
if (buf.charAt(split - 1) == '/') {
if (p2.startsWith(SLASH)) {
buf.deleteCharAt(split - 1);
buf.insert(split - 1, p2);
} else
buf.insert(split, p2);
} else {
if (p2.startsWith(SLASH))
buf.insert(split, p2);
else {
buf.insert(split, '/');
buf.insert(split + 1, p2);
}
}
return buf.toString();
}
}
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