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package com.sun.star.lib.connections.pipe;

import com.sun.star.comp.loader.FactoryHelper;
import com.sun.star.connection.ConnectionSetupException;
import com.sun.star.connection.NoConnectException;
import com.sun.star.connection.XConnection;
import com.sun.star.connection.XConnector;
import com.sun.star.lang.XMultiServiceFactory;
import com.sun.star.lang.XSingleServiceFactory;
import com.sun.star.registry.XRegistryKey;

/**
 * A component that implements the <code>XConnector</code> interface.
 *
 * <p>The <code>pipeConnector</code> is a specialized component that uses TCP
 * pipes for communication.  The <code>pipeConnector</code> is generally
 * used by the <code>com.sun.star.connection.Connector</code> service.</p>
 *
 * @see com.sun.star.connections.XAcceptor
 * @see com.sun.star.connections.XConnection
 * @see com.sun.star.connections.XConnector
 * @see com.sun.star.loader.JavaLoader
 *
 * @since UDK 1.0
 */
public final class pipeConnector implements XConnector {
    /**
     * The name of the service.
     *
     * <p>The <code>JavaLoader</code> acceses this through reflection.</p>
     *
     * @see com.sun.star.comp.loader.JavaLoader
     */
    public static final String __serviceName = "com.sun.star.connection.pipeConnector";

    /**
     * Returns a factory for creating the service.
     *
     * <p>This method is called by the <code>JavaLoader</code>.</p>
     *
     * @param implName the name of the implementation for which a service is
     *     requested.
     * @param multiFactory the service manager to be used (if needed).
     * @param regKey the registry key.
     * @return an <code>XSingleServiceFactory</code> for creating the component.
     *
     * @see com.sun.star.comp.loader.JavaLoader
     */
    public static XSingleServiceFactory __getServiceFactory(
        String implName, XMultiServiceFactory multiFactory, XRegistryKey regKey)
    {
        return implName.equals(pipeConnector.class.getName())
            ? FactoryHelper.getServiceFactory(pipeConnector.class,
                                              __serviceName, multiFactory,
                                              regKey)
            : null;
    }

    /**
     * Writes the service information into the given registry key.
     *
     * <p>This method is called by the <code>JavaLoader</code>.</p>
     *
     * @param regKey the registry key.
     * @return <code>true</code> if the operation succeeded.
     *
     * @see com.sun.star.comp.loader.JavaLoader
     */
    public static boolean __writeRegistryServiceInfo(XRegistryKey regKey) {
        return FactoryHelper.writeRegistryServiceInfo(
            pipeConnector.class.getName(), __serviceName, regKey);
    }

    /**
     * Connects via the described pipe to a waiting server.
     *
     * <p>The connection description has the following format:
     * <code><var>type</var></code><!--
     *     -->*(<code><var>key</var>=<var>value</var></code>),
     * where <code><var>type</var></code> should be <code>pipe</code>
     * (ignoring case).  Supported keys (ignoring case) currently are
     * <dl>
     * <dt><code>host</code>
     * <dd>The name or address of the server.  Must be present.
     * <dt><code>port</code>
     * <dd>The TCP port number of the server (defaults to <code>6001</code>).
     * <dt><code>tcpnodelay</code>
     * <dd>A flag (<code>0</code>/<code>1</code>) enabling or disabling Nagle's
     *     algorithm on the resulting connection.
     * </dl></p>
     *
     * @param connectionDescription the description of the connection.
     * @return an <code>XConnection</code> to the server.
     *
     * @see com.sun.star.connections.XAcceptor
     * @see com.sun.star.connections.XConnection
     */
    public synchronized XConnection connect(String connectionDescription)
        throws NoConnectException, ConnectionSetupException
    {
        if (bConnected) {
            throw new ConnectionSetupException("alread connected");
        }

    try
    {
        XConnection xConn = new PipeConnection( connectionDescription );
        bConnected = true;
        return xConn;
    }
    catch ( java.io.IOException e ) { throw new NoConnectException(); }
    }

    private boolean bConnected = false;
}