/* * Copyright (c) 2002, 2003, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.jmx.snmp.defaults;  // java import//import java.io.File;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.util.StringTokenizer; /** * This class represents a set of default directories used by Java DMK. * * <p><b>This API is a Sun Microsystems internal API  and is subject * to change without notice.</b></p> * @since 1.5 */public class DefaultPaths {    private static final String INSTALL_PATH_RESOURCE_NAME = "com/sun/jdmk/defaults/install.path";    // private constructor defined to "hide" the default public constructor    private DefaultPaths() {     }     // PUBLIC STATIC METHODS    //----------------------     /**     * Returns the installation directory for Java DMK.     *     * The default value of the installation directory is:     * <CODE>&lt;base_dir&gt; + File.separator + SUNWjdmk + File.separator + jdmk5.0 </CODE>     *     * @return Java DMK installation directory.     */    public static String getInstallDir() {        if (installDir == null)            return useRessourceFile();        else            return installDir;    }     /**     * Returns the installation directory for Java DMK concatenated with dirname.     *     * The default value of the installation directory is:     * <CODE>&lt;base_dir&gt; + File.separator + SUNWjdmk + File.separator + jdmk5.0 </CODE>     *     * @param dirname The directory to be appended.     *     * @return Java DMK installation directory + <CODE>File.separator</CODE> + <CODE>dirname</CODE>.     */    public static String getInstallDir(String dirname) {        if (installDir == null) {            if (dirname == null) {                return getInstallDir();            } else {                return getInstallDir() + File.separator + dirname;            }        } else {            if (dirname == null) {                return installDir;            } else {                return installDir + File.separator + dirname;            }        }    }     /**     * Sets the installation directory for Java DMK.     *     * @param dirname The directory where Java DMK resides.     */    public static void setInstallDir(String dirname) {        installDir = dirname;    }     /**     * Returns the <CODE>etc</CODE> directory for Java DMK.     * <P>     * The default value of the <CODE>etc</CODE> directory is:     * <UL>     * <LI><CODE>DefaultPaths.getInstallDir("etc")</CODE>.     * </UL>     *     * @return Java DMK <CODE>etc</CODE> directory.     */    public static String getEtcDir() {        if (etcDir == null)            return getInstallDir("etc");        else            return etcDir;    }     /**     * Returns the <CODE>etc</CODE> directory for Java DMK concatenated with dirname.     * <P>     * The default value of the <CODE>etc</CODE> directory is:     * <UL>     * <LI><CODE>DefaultPaths.getInstallDir("etc")</CODE>.     * </UL>     *     * @param dirname The directory to be appended.     *     * @return Java DMK <CODE>etc</CODE> directory + <CODE>File.separator</CODE> + <CODE>dirname</CODE>.     */    public static String getEtcDir(String dirname) {        if (etcDir == null) {            if (dirname == null) {                return getEtcDir();            } else {                return getEtcDir() + File.separator + dirname;            }        } else {            if (dirname == null) {                return etcDir;            } else {                return etcDir + File.separator + dirname;            }        }    }     /**     * Sets the <CODE>etc</CODE> directory for Java DMK.     *     * @param dirname The <CODE>etc</CODE> directory for Java DMK.     */    public static void setEtcDir(String dirname) {        etcDir = dirname;    }     /**     * Returns the <CODE>tmp</CODE> directory for the product.     * <P>     * The default value of the <CODE>tmp</CODE> directory is:     * <UL>     * <LI><CODE>DefaultPaths.getInstallDir("tmp")</CODE>.     * </UL>     *     * @return Java DMK <CODE>tmp</CODE> directory.     */    public static String getTmpDir() {         if (tmpDir == null)            return getInstallDir("tmp");        else            return tmpDir;    }     /**     * Returns the <CODE>tmp</CODE> directory for Java DMK concatenated with dirname.     * <P>     * The default value of the <CODE>tmp</CODE> directory is:     * <UL>     * <LI><CODE>DefaultPaths.getInstallDir("tmp")</CODE>.     * </UL>     *     * @param dirname The directory to be appended.     *     * @return Java DMK <CODE>tmp</CODE> directory + <CODE>File.separator</CODE> + <CODE>dirname</CODE>.     */    public static String getTmpDir(String dirname) {        if (tmpDir == null) {            if (dirname == null) {                return getTmpDir();            } else {                return getTmpDir() + File.separator + dirname;            }        } else {            if (dirname == null) {                return tmpDir;            } else {                return tmpDir + File.separator + dirname;            }        }    }     /**     * Sets the <CODE>tmp</CODE> directory for the product     *     * @param dirname The <CODE>tmp</CODE> directory for Java DMK.     */    public static void setTmpDir(String dirname) {        tmpDir = dirname;    }      // PRIVATE STATIC METHODS    //-----------------------     private static String useRessourceFile() {        InputStream in = null;        BufferedReader r = null;        try {            in =                DefaultPaths.class.getClassLoader().getResourceAsStream(INSTALL_PATH_RESOURCE_NAME);            if(in == null) return null;            r = new BufferedReader(new InputStreamReader(in));            installDir = r.readLine();        }catch(Exception e) {        }        finally {            try {                if(in != null) in.close();                if(r != null) r.close();            }catch(Exception e) {}        }        return installDir;    }     // PRIVATE VARIABLES    //------------------     /**     * Directories used by Java DMK.     */    private static String etcDir;    private static String tmpDir;    private static String installDir;}