/**
* This file is part of CloudML [ http://cloudml.org ]
*
* Copyright (C) 2012 - SINTEF ICT
* Contact: Franck Chauvel <franck.chauvel@sintef.no>
*
* Module: root
*
* CloudML is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* CloudML 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with CloudML. If not, see
* <http://www.gnu.org/licenses/>.
*/
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package org.cloudml.connectors.util;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.jxpath.JXPathContext;
/**
*
* @author Hui Song
*/
public class CloudMLQueryUtil {
private static Pattern selfPattern = Pattern.compile("@self\\{[^\\{\\}]*\\}");
private static Pattern instPattern = Pattern.compile("@instance\\{[^\\{\\}]*\\}");
public static Object cloudmlQuery(String jxpath, Object context){
JXPathContext jxpathcontext = JXPathContext.newContext(context);
return jxpathcontext.getValue(jxpath);
}
public static String cloudmlStringRecover(String string, Object self, Object instance){
while(true){
Matcher matcher = selfPattern.matcher(string);
if(matcher.find()){
String rawQuery = matcher.group();
String query = rawQuery.substring(6, rawQuery.length()-1);
string = string.replaceAll(
Pattern.quote(rawQuery),
cloudmlQuery(query, self).toString()
);
continue;
}
matcher = instPattern.matcher(string);
if(matcher.find()){
String rawQuery = matcher.group();
String query = rawQuery.substring(10, rawQuery.length()-1);
string = string.replaceAll(
Pattern.quote(rawQuery),
cloudmlQuery(query, instance).toString()
);
continue;
}
break;
}
return string;
}
public static void main(String[] args){
Matcher matcher = selfPattern.matcher("@self{properties/entry_spring}::@self{a}//bean[@id=\"dataSource\"]/property[@name=\"url\"]/@value");
while(matcher.find()) {
System.out.println(matcher.group());
System.out.println("--");
}
System.out.println("12345".substring(2,4));
System.out.println(cloudmlStringRecover("@self{properties/entry_spring}::@instance{a}//bean[@id=\"dataSource\"]/property[@name=\"url\"]/@value",null,null));
}
}