| /* |
| * 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.felix.bundlerepository.metadataparser; |
| |
| import java.util.Map; |
| |
| /** |
| * This class provides methods to replace ${var} substring by values stored in a map |
| */ |
| public class ReplaceUtility |
| { |
| /** |
| * This method replaces ${var} substring by values stored in a map. |
| * @return resulted string |
| */ |
| public static String replace(String str, Map values) |
| { |
| int len = str.length(); |
| StringBuffer sb = new StringBuffer(len); |
| |
| int prev = 0; |
| int start = str.indexOf("${"); |
| int end = str.indexOf("}", start); |
| while (start != -1 && end != -1) |
| { |
| String key = str.substring(start + 2, end); |
| Object value = values.get(key); |
| if (value != null) |
| { |
| sb.append(str.substring(prev, start)); |
| sb.append(value); |
| } |
| else |
| { |
| sb.append(str.substring(prev, end + 1)); |
| } |
| prev = end + 1; |
| if (prev >= str.length()) |
| { |
| break; |
| } |
| start = str.indexOf("${", prev); |
| if (start != -1) |
| { |
| end = str.indexOf("}", start); |
| } |
| } |
| |
| sb.append(str.substring(prev)); |
| |
| return sb.toString(); |
| } |
| |
| // public static void main(String[] args){ |
| // Map map=new HashMap(); |
| // map.put("foo","FOO"); |
| // map.put("bar","BAR"); |
| // map.put("map",map); |
| // |
| // String str; |
| // if(args.length==0) str=""; else str=args[0]; |
| // |
| // System.out.println(replace(str,map)); |
| // |
| // } |
| } |