Util.java

/*
	Launch4j (http://launch4j.sourceforge.net/)
	Cross-platform Java application wrapper for creating Windows native executables.

	Copyright (c) 2004, 2015 Grzegorz Kowal
	All rights reserved.

	Redistribution and use in source and binary forms, with or without modification,
	are permitted provided that the following conditions are met:
	
	1. Redistributions of source code must retain the above copyright notice,
	   this list of conditions and the following disclaimer.
	
	2. Redistributions in binary form must reproduce the above copyright notice,
	   this list of conditions and the following disclaimer in the documentation
	   and/or other materials provided with the distribution.
	
	3. Neither the name of the copyright holder nor the names of its contributors
	   may be used to endorse or promote products derived from this software without
	   specific prior written permission.
	
	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
	FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
	AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*
 * Created on 2005-04-24
 */
package net.sf.launch4j;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.io.Writer;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author Copyright (C) 2005 Grzegorz Kowal
 */
public class Util {
	public static final boolean WINDOWS_OS = System.getProperty("os.name")
			.toLowerCase().startsWith("windows");
	
	private static final String Launch4jProperties = "launch4j.properties";

	private Util() {}
	
	public static Properties getProperties() throws IOException {
		Properties props = new Properties();
		InputStream in = Main.class.getClassLoader().getResourceAsStream(Launch4jProperties);
		props.load(in);
		in.close();
		return props;
	}

	public static File createTempFile(String suffix) throws IOException {
		String tmpdir = System.getProperty("launch4j.tmpdir");
		if (tmpdir != null) {
			if (tmpdir.indexOf(' ') != -1) {
				throw new IOException(Messages.getString("Util.tmpdir"));
			}
			return File.createTempFile("launch4j", suffix, new File(tmpdir));
		} else {
			return File.createTempFile("launch4j", suffix);
		}
	}

	public static File getJarBasedir() {
		try {
			URI uri = new URI(Util.class.getClassLoader()
					.getResource(Launch4jProperties)
					.getFile());

			String path = uri.getPath();

			if (path.startsWith("/") && path.contains("!")) {
				// jar file
				String jarPath = path.substring(0, path.lastIndexOf('!'));
				String basedir = jarPath.substring(0, jarPath.lastIndexOf('/') + 1);
				return new File(basedir);
			} else {
				// class files - launch4j development
				return new File(".");
			}
		} catch (URISyntaxException e) {
			throw new RuntimeException(e);
		}
	}

	public static File getAbsoluteFile(File basepath, File f) {
		return f.isAbsolute() ? f : new File(basepath, f.getPath());
	}

	public static String getExtension(File f) {
		String name = f.getName();
		int x = name.lastIndexOf('.');
		if (x != -1) {
			return name.substring(x);
		} else {
			return "";
		}
	}

	public static void exec(String[] cmd, Log log) throws ExecException {
		BufferedReader is = null;
		try {
			if (WINDOWS_OS) {
				for (int i = 0; i < cmd.length; i++) {
					cmd[i] = cmd[i].replaceAll("/", "\\\\");
				}
			}
			Process p = Runtime.getRuntime().exec(cmd);
			is = new BufferedReader(new InputStreamReader(p.getErrorStream()));
			String line;
			int errLine = -1;
			Pattern pattern = Pattern.compile(":\\d+:");
			while ((line = is.readLine()) != null) {
				log.append(line);
				Matcher matcher = pattern.matcher(line);
				if (matcher.find()) {
					errLine = Integer.valueOf(
							line.substring(matcher.start() + 1, matcher.end() - 1))
							.intValue();
					break;
				}
			}
			is.close();
			p.waitFor();
			if (errLine != -1) {
				StringBuffer sb = new StringBuffer(Messages.getString("Util.exec.failed"));
				AppendCommandLine(sb, cmd);
				throw new ExecException(sb.toString(), errLine);
			}
			if (p.exitValue() != 0) {
				StringBuffer sb = new StringBuffer(Messages.getString("Util.exec.failed"));
				sb.append(" (");
				sb.append(p.exitValue());
				sb.append(')');
				AppendCommandLine(sb, cmd);
				throw new ExecException(sb.toString());
			}
		} catch (IOException e) {
			close(is);
			throw new ExecException(e);
		} catch (InterruptedException e) {
			close(is);
			throw new ExecException(e);
		}
	}
	
	private static void AppendCommandLine(StringBuffer sb, String[] cmd) {
		sb.append(": ");
		for (int i = 0; i < cmd.length; i++) {
			sb.append(cmd[i]);
			if (i < cmd.length - 1) {
				sb.append(' ');
			}
		}
	}

	public static void close(final InputStream o) {
		if (o != null) {
			try {
				o.close();
			} catch (IOException e) {
				System.err.println(e); // XXX log
			}
		}
	}

	public static void close(final OutputStream o) {
		if (o != null) {
			try {
				o.close();
			} catch (IOException e) {
				System.err.println(e); // XXX log
			}
		}
	}

	public static void close(final Reader o) {
		if (o != null) {
			try {
				o.close();
			} catch (IOException e) {
				System.err.println(e); // XXX log
			}
		}
	}

	public static void close(final Writer o) {
		if (o != null) {
			try {
				o.close();
			} catch (IOException e) {
				System.err.println(e); // XXX log
			}
		}
	}

	public static boolean delete(File f) {
		return (f != null) ? f.delete() : false;
	}
}