/*
 * Copyright 2002-2005 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.commons.vfs.provider;

import org.apache.commons.vfs.FileName;

/**
 * A file name that represents a 'generic' URI, as per RFC 2396.  Consists of
 * a scheme, userinfo (typically username and password), hostname, port, and
 * path.
 *
 * @author <a href="mailto:adammurdoch@apache.org">Adam Murdoch</a>
 * @version $Revision$ $Date$
 */
public class GenericFileName extends AbstractFileName
{
    private final String userName;
    private final String hostName;
    private final int defaultPort;
    private final String password;
    private final int port;
    private static final char[] USERNAME_RESERVED = {':', '@', '/'};
    private static final char[] PASSWORD_RESERVED = {'@', '/'};

    protected GenericFileName(final String scheme,
                              final String hostName,
                              final int port,
                              final int defaultPort,
                              final String userName,
                              final String password,
                              final String path)
    {
        super(scheme, path);
        this.hostName = hostName;
        this.defaultPort = defaultPort;
        this.password = password;
        this.userName = userName;
        if (port > 0)
        {
            this.port = port;
        }
        else
        {
            this.port = getDefaultPort();
        }
    }

    /**
     * Returns the user name part of this name.
     */
    public String getUserName()
    {
        return userName;
    }

    /**
     * Returns the password part of this name.
     */
    public String getPassword()
    {
        return password;
    }

    /**
     * Returns the host name part of this name.
     */
    public String getHostName()
    {
        return hostName;
    }

    /**
     * Returns the port part of this name.
     */
    public int getPort()
    {
        return port;
    }

    /**
     * Returns the default port for this file name.
     */
    public int getDefaultPort()
    {
        return defaultPort;
    }

    public FileName createName(String absPath)
    {
        return new GenericFileName(
            getScheme(),
            hostName,
            port,
            defaultPort,
            userName,
            password,
            absPath);
    }

    /**
     * Builds the root URI for this file name.
     */
    protected void appendRootUri(final StringBuffer buffer)
    {
        buffer.append(getScheme());
        buffer.append("://");
        appendCredentials(buffer);
        buffer.append(hostName);
        if (port != getDefaultPort())
        {
            buffer.append(':');
            buffer.append(port);
        }
    }

    /**
     * append the user credentials
     */
    protected void appendCredentials(StringBuffer buffer)
    {
        if (userName != null && userName.length() != 0)
        {
            UriParser.appendEncoded(buffer, userName, USERNAME_RESERVED);
            if (password != null && password.length() != 0)
            {
                buffer.append(':');
                UriParser.appendEncoded(buffer, password, PASSWORD_RESERVED);
            }
            buffer.append('@');
        }
    }
}