| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed 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 com.android.tradefed.util; |
| |
| import java.io.BufferedReader; |
| import java.io.BufferedWriter; |
| import java.io.File; |
| import java.io.FileReader; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| /** |
| * A utility class for changing (or adding) items in an Android property file |
| * |
| */ |
| public abstract class PropertyChanger { |
| |
| /** |
| * A utility function to change (or add) items in an Android property file |
| * |
| * Properties that are in the original property file will have its value modified. New ones |
| * will be appended. Caller is responsible for properly recycling temporary files, both original |
| * and the modified. |
| * |
| * @param original the original property file |
| * @param properties the properties to change or add |
| * @return path to the new property file |
| */ |
| public static File changeProperties(File original, Map<String, String> properties) |
| throws IOException { |
| Map<String, String> propsToAdd = new HashMap<String, String>(properties); |
| File ret = FileUtil.createTempFile("chg_prop_", ".prop"); |
| BufferedReader br = null; |
| BufferedWriter bw = null; |
| try { |
| br = new BufferedReader(new FileReader(original)); |
| bw = new BufferedWriter(new FileWriter(ret)); |
| String line = null; |
| while ((line = br.readLine()) != null) { |
| int pos = line.indexOf('='); |
| if (pos != -1) { |
| String name = line.substring(0, pos); |
| if (propsToAdd.containsKey(name)) { |
| // modify the line if property needs to be changed |
| line = String.format("%s=%s", name, propsToAdd.get(name)); |
| propsToAdd.remove(name); |
| } |
| } |
| // write line into new property file |
| bw.write(line + '\n'); |
| } |
| // write remaining properties (new ones) |
| for (Entry<String, String> entry : propsToAdd.entrySet()) { |
| bw.write(String.format("%s=%s\n", entry.getKey(), entry.getValue())); |
| } |
| } finally { |
| if (br != null) { |
| br.close(); |
| } |
| if (bw != null) { |
| bw.close(); |
| } |
| } |
| return ret; |
| } |
| } |