| /* |
| * Copyright 2000-2012 JetBrains s.r.o. |
| * |
| * 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.intellij.openapi.util.io; |
| |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * User: Vassiliy.Kudryashov |
| */ |
| public class WindowsRegistryUtil { |
| private WindowsRegistryUtil() { |
| } |
| |
| @Nullable |
| private static String trimToValue(@Nullable StringBuilder output) { |
| if (output == null) { |
| return null; |
| } |
| int pos = output.lastIndexOf(" "); |
| int pos2 = output.lastIndexOf("\t"); |
| pos = Math.max(pos, pos2); |
| if (pos == -1) { |
| return null; |
| } |
| |
| output.delete(0, pos + 1); |
| String blackList = "\r\n \""; |
| int startPos = 0; |
| int endPos = output.length() - 1; |
| while (true) { |
| if (startPos >= endPos) { |
| return null; |
| } |
| if (blackList.indexOf(output.charAt(startPos)) != -1) { |
| startPos++; |
| } |
| else { |
| break; |
| } |
| } |
| while (true) { |
| if (blackList.indexOf(output.charAt(endPos)) != -1) { |
| endPos--; |
| } |
| else { |
| break; |
| } |
| } |
| return output.subSequence(startPos, endPos + 1).toString(); |
| } |
| |
| @NotNull |
| public static List<String> readRegistryBranch(@NotNull String location) { |
| List<String> result = new ArrayList<String>(); |
| StringBuilder output = readRegistry("reg query \"" + location + "\" /s"); |
| if (output != null) { |
| for (int pos = output.indexOf(location); pos != -1; pos = output.indexOf(location, pos + location.length())) { |
| int pos2 = output.indexOf("\r\n", pos + location.length()); |
| if (pos2 <= pos + location.length()) { |
| continue; |
| } |
| String section = output.substring(pos + location.length() + 1, pos2); |
| if (!section.contains("\\")) { |
| result.add(section); |
| } |
| } |
| } |
| return result; |
| } |
| |
| @Nullable |
| public static String readRegistryDefault(@NotNull String location) { |
| return trimToValue(readRegistry("reg query \"" + location + "\" /ve")); |
| } |
| |
| @Nullable |
| public static String readRegistryValue(@NotNull String location, @NotNull String key) { |
| return trimToValue(readRegistry("reg query \"" + location + "\" /v " + key)); |
| } |
| |
| @Nullable |
| private static StringBuilder readRegistry(String command) { |
| try { |
| Process process = Runtime.getRuntime().exec(command); |
| StringBuilder output = null; |
| InputStream is = null; |
| ByteArrayOutputStream os = null; |
| try { |
| byte[] buffer = new byte[128]; |
| is = process.getInputStream(); |
| os = new ByteArrayOutputStream(); |
| for (int length = is.read(buffer); length > 0; length = is.read(buffer)) { |
| os.write(buffer, 0, length); |
| } |
| output = new StringBuilder(new String(os.toByteArray())); |
| } |
| catch (IOException ignored) { |
| |
| } |
| finally { |
| if (is != null) { |
| is.close(); |
| } |
| if (os != null) { |
| os.close(); |
| } |
| process.waitFor(); |
| } |
| |
| return output; |
| } |
| catch (Exception e) { |
| return null; |
| } |
| } |
| } |