Package org.knopflerfish.bundle.console

Source Code of org.knopflerfish.bundle.console.Alias

/*
* Copyright (c) 2003-2008, KNOPFLERFISH project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
*   notice, this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the KNOPFLERFISH project 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 OWNER 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.
*/

package org.knopflerfish.bundle.console;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Properties;
import java.util.StringTokenizer;

// ******************** BundleDependentsCommand ********************
/**
*
*
* @author Jan Stein
* @version $Revision: 1.1.1.1 $
*/
class Alias extends Hashtable {

    private static final long serialVersionUID = 1L;

    public String getString(String key) {
        String[] a = (String[]) get(key);
        if (a != null) {
            StringBuffer sb = new StringBuffer();
            sb.append(a[0]);
            for (int i = 1; i < a.length; i++) {
                sb.append(" ");
                sb.append(a[i]);
            }
            return sb.toString();
        }
        return null;
    }

    void save(OutputStream out) {
        try {
            Properties props = new Properties();
            for (Enumeration e = keys(); e.hasMoreElements();) {
                String k = (String) e.nextElement();
                String[] a = (String[]) get(k);

                StringBuffer sb = new StringBuffer();

                for (int i = 0; i < a.length; i++) {
                    sb.append(a[i].trim());
                    if (i < a.length - 1) {
                        sb.append(" ");
                    }
                }
                props.put(k.trim(), sb.toString());
            }
            props.save(out, "aliases");
        } finally {
            try {
                out.close();
            } catch (Exception ignored) {
            }
        }
    }

    void restore(InputStream in) throws IOException {
        try {
            Properties props = new Properties();
            props.load(in);
            for (Enumeration e = props.keys(); e.hasMoreElements();) {
                String k = (String) e.nextElement();
                String args = (String) props.get(k);

                StringTokenizer st = new StringTokenizer(args, " ");
                String[] a = new String[st.countTokens()];
                for (int i = 0; i < a.length; i++) {
                    a[i] = st.nextToken();
                }
                put(k, a);
            }
        } finally {
            try {
                in.close();
            } catch (Exception ignored) {
            }
        }
    }

    void cgalias(String group, String[] cmds) {
        for (int i = 0; i < cmds.length; i++) {
            put(cmds[i], new String[] { group, cmds[i] });
        }
    }

    void setDefault() {
        clear();

        cgalias("/session", new String[] { "alias", "echo", "enter", "leave",
                "help", "quit", "source", "unalias" });

        String aliasFile = System
                .getProperty("org.knopflerfish.console.alias.file");
        if (aliasFile != null && !"".equals(aliasFile)) {
            File file = new File(aliasFile);
            if (file.exists()) {
                try {
                    restore(new FileInputStream(aliasFile));
                } catch (Exception e) {
                    System.err.println("Failed to restore aliases from "
                            + aliasFile);
                }
                return;
            }
            System.out.println("default alias file " + file.getAbsolutePath()
                    + " does not exists, using internal defaults");
        }

        cgalias("/framework", new String[] { "bundles", "install", "start",
                "stop", "update", "refresh", "services", "startlevel",
                "shutdown", });
        // shortcuts
        put("fw", new String[] { "/session", "enter", "framework" });

        // backward compability
        put("log", new String[] { "/log", "show" });
        put("lsb", new String[] { "/framework", "bundles", "-i" });
        put("lss", new String[] { "/framework", "services" });

        // Oscar compatability
        put("exports", new String[] { "/framework", "package", "-b" });
        put("ps", new String[] { "/framework", "bundles", "-i" });

        // JES compatability
        put("manifest", new String[] { "/framework", "headers" });
    }
}
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