/**
* Licensed to Jasig under one or more contributor license
* agreements. See the NOTICE file distributed with this work
* for additional information regarding copyright ownership.
* Jasig licenses this file to you 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.jasig.portal.utils;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
import java.util.Vector;
import org.apache.oro.text.regex.MalformedPatternException;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.PatternCompiler;
import org.apache.oro.text.regex.PatternMatcher;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Perl5Matcher;
public class PropsMatcher {
Vector patterns;
Vector ids;
PatternMatcher matcher;
public PropsMatcher(InputStream is) throws IOException {
PatternCompiler compiler=new Perl5Compiler();
matcher=new Perl5Matcher();
// read in a properties file
Vector v=readPropertiesVector(is);
patterns=new Vector();
ids=new Vector(v.size());
// prepare separate vectors of compiled patterns
// and mapped ids
for(int i=0;i<v.size();i++) {
String[] temp=(String[]) v.elementAt(i);
// compile a pattern
try {
Pattern p=compiler.compile(temp[0]);
patterns.addElement(p);
// save the id
ids.addElement(temp[1]);
} catch (MalformedPatternException mpe) {
// omit entry, give warning*
System.out.println("PropsMatcher::PropsMatcher() : invalid pattern: "+temp[0]);
System.out.println("PropsMatcher::PropsMatcher() : "+mpe.getMessage());
}
}
}
public String match(String input) {
// sequentially try to match to every pattern
for(int i=0;i<patterns.size();i++) {
if(matcher.matches(input,(Pattern) patterns.elementAt(i))) {
return (String) ids.elementAt(i);
}
}
return null;
}
private Vector readPropertiesVector(InputStream inputStream) throws IOException {
Vector v=new Vector(10);
BufferedReader input = new BufferedReader(new InputStreamReader(inputStream));
String currentLine, Key = null;
StringTokenizer currentTokens;
while ((currentLine = input.readLine()) != null) {
currentTokens = new StringTokenizer(currentLine, "=\t\r\n");
if (currentTokens.hasMoreTokens()) {
Key = currentTokens.nextToken().trim();
}
if ((Key != null) && !Key.startsWith("#") && currentTokens.hasMoreTokens()) {
String temp[] = new String[2];
temp[0] = Key;
temp[1] = currentTokens.nextToken().trim();
v.addElement(temp);
}
}
return v;
}
}