/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.enterprise.config.util;
//import org.w3c.dom.*;
//import org.xml.sax.*;
//import java.util.logging.Logger;
//import java.util.logging.Level;
//import com.sun.logging.LogDomains;
/**
* Helper methods are provided to generate valid xpaths
* that are needed by config api.
*/
public final class ConfigXPathHelper {
public static final String XPATH_SEPARATOR = "/";
/**
* @param childTagName
* @param nameId
* @param valueId
*
*/
public static String getAbsoluteIdXpathExpression(String childTagName, String nameId, String valueId) {
if(childTagName.startsWith(XPATH_SEPARATOR))
return childTagName + "[@" + nameId + "='" + valueId + "']";
else
return XPATH_SEPARATOR + childTagName + "[@" + nameId + "='" + valueId + "']";
}
private static char SEPARATOR_CHAR = '/';
private static char OPENBRACKET_CHAR = '[';
private static char CLOSEBRACKET_CHAR = ']';
private static char ESCAPE_CHAR = '\\';
/*
* returns element's tag name extracting from its xpath
*/
public static String getLastNodeName(String xPath) {
//FIXME: it is supposed that open bracket should be escaped if its part of name or value
// FIXME no error handling
int idx = xPath.length()-1;
char ch;
int idxEnd = -1;
if(idx>=0 && (ch=xPath.charAt(idx))==CLOSEBRACKET_CHAR) {
idxEnd = bypassBrackets(xPath, --idx);
idx = idxEnd;
}
while(idx>=0 && ((ch=xPath.charAt(idx))!=SEPARATOR_CHAR || isEscapedChar(xPath,idx))) {
idx--;
}
idx++;
if(idxEnd<=0 || idxEnd==xPath.length()-1)
return xPath.substring(idx);
else
return xPath.substring(idx, idxEnd+1);
}
/*
* returns parent XPath for givend child's xpath
* correcly bypasses bracketed values with possible escaping inside of quoted values
*/
public static String getParentXPath(String xPath) {
//FIXME: it is supposed that open bracket should be escaped if its part of name or value
// FIXME no error handling
int idx = xPath.length()-1;
char ch;
if(idx>=0 && (ch=xPath.charAt(idx))==CLOSEBRACKET_CHAR) {
idx = bypassBrackets(xPath, --idx);
}
while(idx>=0 && ((ch=xPath.charAt(idx))!=SEPARATOR_CHAR || isEscapedChar(xPath,idx))) {
idx--;
}
if(idx<=0)
return "/";
return xPath.substring(0, idx);
}
private static int bypassBrackets(String xPath, int idx) {
char ch;
while(idx>=0 && ((ch=xPath.charAt(idx))!=OPENBRACKET_CHAR || isEscapedChar(xPath,idx))) {
idx--;
}
return idx-1;
}
private static boolean isEscapedChar(String xPath, int idx) {
if(idx<=0)
return false;
int count = 0;
while(--idx>=0 && xPath.charAt(idx)==ESCAPE_CHAR)
count++;
return ((count%2)==1);
}
}
|