src/org/apache/osgi/bundle/shell/CdCommandImpl.java

/*
 *   Copyright 2005 The Apache Software Foundation
 *
 *   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 org.apache.osgi.bundle.shell;

import java.io.PrintStream;
import java.util.StringTokenizer;

import org.apache.osgi.service.shell.CdCommand;
import org.osgi.framework.BundleContext;

public class CdCommandImpl implements CdCommand
{
    private BundleContext m_context = null;
    private String m_baseURL = "";

    public CdCommandImpl(BundleContext context)
    {
        m_context = context;

        // See if the initial base URL is specified.
        String baseURL = m_context.getProperty(BASE_URL_PROPERTY);
        setBaseURL(baseURL);
    }

    public String getName()
    {
        return "cd";
    }

    public String getUsage()
    {
        return "cd [<base-URL>]";
    }

    public String getShortDescription()
    {
        return "change or display base URL.";
    }

    public void execute(String s, PrintStream out, PrintStream err)
    {
        StringTokenizer st = new StringTokenizer(s, " ");

        // Ignore the command name.
        st.nextToken();

        // No more tokens means to display the base URL,
        // otherwise set the base URL.
        if (st.countTokens() == 0)
        {
            out.println(m_baseURL);
        }
        else if (st.countTokens() == 1)
        {
            setBaseURL(st.nextToken());
        }
        else
        {
            err.println("Incorrect number of arguments");
        }
    }

    public String getBaseURL()
    {
        return m_baseURL;
    }

    public void setBaseURL(String s)
    {
        m_baseURL = (s == null) ? "" : s;
    }
}