| /** |
| * 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.blueprint.utils; |
| |
| 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. |
| * |
| * @version $Rev$, $Date$ |
| */ |
| public class 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); |
| } |
| |
| } |
| } |