/** | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF 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.apache.aries.spifly; | |
import java.util.ArrayList; | |
import java.util.HashMap; | |
import java.util.List; | |
import java.util.Map; | |
/** | |
* Utility class to parse a standard OSGi header with paths. | |
* | |
* Stolen from Aries Blueprint Core (blueprint.utils). Need to give it back! | |
*/ | |
public class HeaderParser { | |
private HeaderParser() {} | |
/** | |
* Parse a given OSGi header into a list of paths | |
* | |
* @param header the OSGi header to parse | |
* @return the list of paths extracted from this header | |
*/ | |
public static List<PathElement> parseHeader(String header) { | |
List<PathElement> elements = new ArrayList<PathElement>(); | |
if (header == null || header.trim().length() == 0) { | |
return elements; | |
} | |
String[] clauses = header.split(",(?![^\\(\\)]*(\\)))"); | |
for (String clause : clauses) { | |
String[] tokens = clause.split(";"); | |
if (tokens.length < 1) { | |
throw new IllegalArgumentException("Invalid header clause: " + clause); | |
} | |
PathElement elem = new PathElement(tokens[0].trim()); | |
elements.add(elem); | |
for (int i = 1; i < tokens.length; i++) { | |
int pos = tokens[i].indexOf('='); | |
if (pos != -1) { | |
if (pos > 0 && tokens[i].charAt(pos - 1) == ':') { | |
String name = tokens[i].substring(0, pos - 1).trim(); | |
String value = tokens[i].substring(pos + 1).trim(); | |
elem.addDirective(name, value); | |
} else { | |
String name = tokens[i].substring(0, pos).trim(); | |
String value = tokens[i].substring(pos + 1).trim(); | |
elem.addAttribute(name, value); | |
} | |
} else { | |
elem = new PathElement(tokens[i].trim()); | |
elements.add(elem); | |
} | |
} | |
} | |
return elements; | |
} | |
public static class PathElement { | |
private String path; | |
private Map<String, String> attributes; | |
private Map<String, String> directives; | |
public PathElement(String path) { | |
this.path = path; | |
this.attributes = new HashMap<String, String>(); | |
this.directives = new HashMap<String, String>(); | |
} | |
public String getName() { | |
return this.path; | |
} | |
public Map<String, String> getAttributes() { | |
return attributes; | |
} | |
public String getAttribute(String name) { | |
return attributes.get(name); | |
} | |
public void addAttribute(String name, String value) { | |
attributes.put(name, value); | |
} | |
public Map<String, String> getDirectives() { | |
return directives; | |
} | |
public String getDirective(String name) { | |
return directives.get(name); | |
} | |
public void addDirective(String name, String value) { | |
directives.put(name, value); | |
} | |
} | |
} |