97 lines
3.1 KiB
Java
97 lines
3.1 KiB
Java
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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package com.sun.star.lib.loader;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.nio.charset.Charset;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* This class provides functionality for reading string values from the
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* Windows Registry.
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*/
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final class WinRegKey {
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private final String m_keyName;
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/**
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* Constructs a <code>WinRegKey</code>.
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*/
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public WinRegKey( String keyName ) {
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m_keyName = keyName;
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}
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private static void close(BufferedReader c) {
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if (c == null) return;
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try {
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c.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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/**
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* Reads the default string value.
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*/
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public String getStringValue() throws WinRegKeyException {
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BufferedReader r = null;
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try {
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Process p = Runtime.getRuntime().exec(new String[]{"reg", "QUERY", m_keyName});
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r = new BufferedReader(
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new InputStreamReader(p.getInputStream(), Charset.defaultCharset()));
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String v = null;
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Pattern pt = Pattern.compile("\\s+\\(Default\\)\\s+REG_SZ\\s+(.+)");
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for (;;) {
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String s = r.readLine();
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if (s == null) {
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break;
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}
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Matcher m = pt.matcher(s);
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if (m.matches()) {
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if (v != null) {
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throw new WinRegKeyException("reg QUERY did not provided expected output");
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}
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v = m.group(1);
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}
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}
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p.waitFor();
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int e = p.exitValue();
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if (e != 0) {
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throw new WinRegKeyException("reg QUERY exited with " + e);
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}
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if (v == null) {
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throw new WinRegKeyException("reg QUERY did not provided expected output");
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}
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return v;
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} catch (WinRegKeyException e) {
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throw e;
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} catch (Exception e) {
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throw new WinRegKeyException(e);
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}
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finally {
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close(r);
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}
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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