star/beans/LocalOfficeConnection.java

/**************************************************************
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 com.sun.star.beans;

import java.awt.Container;
import java.io.File;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;

import com.sun.star.lang.XMultiComponentFactory;
import com.sun.star.lang.XEventListener;
import com.sun.star.bridge.XUnoUrlResolver;
import com.sun.star.uno.XComponentContext;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.lib.uno.helper.UnoUrl;
import com.sun.star.lib.util.NativeLibraryLoader;

/**
 * This class represents a connection to the local office application.
 * @deprecated
 */
public class LocalOfficeConnection
	implements OfficeConnection
{
	public static final String		OFFICE_APP_NAME		= "soffice";
	public static final String		OFFICE_LIB_NAME		= "officebean";
	public static final String		OFFICE_ID_SUFFIX	= "_Office";

	private Process				mProcess;
	private ContainerFactory		mContainerFactory;
	private XComponentContext		mContext;

	private String				mURL;
	private String				mProgramPath;
	private String				mConnType;
	private String				mPipe;
	private String				mPort;
	private String				mProtocol;
	private String				mInitialObject;

	private List				mComponents		= new Vector();

	/**
	 * Constructor.
	 * Sets up paths to the office application and native libraries if
	 * values are available in <code>OFFICE_PROP_FILE</code> in the user
	 * home directory.<br />
	 * "com.sun.star.beans.path" - the office application directory;<br/>
	 * "com.sun.star.beans.libpath" - native libraries directory.
	 */
	public LocalOfficeConnection()
	{
		// init member vars
		try
		{
			setUnoUrl( "uno:pipe,name=" + getPipeName() + ";urp;StarOffice.ServiceManager" );
		}
		catch ( java.net.MalformedURLException e )
		{}

		// load libofficebean.so/officebean.dll
		String aSharedLibName = getProgramPath() + java.io.File.separator +
			System.mapLibraryName(OFFICE_LIB_NAME);
		System.load( aSharedLibName );
	}

	/**
	 * Sets a connection URL.
	 * This implementation accepts a UNO URL with following format:<br />
	 * <pre>
	 * url    := uno:localoffice[,&lt;params&gt;];urp;StarOffice.ServiceManager
	 * params := &lt;path&gt;[,&lt;pipe&gt;]
	 * path   := path=&lt;pathv&gt;
	 * pipe   := pipe=&lt;pipev&gt;
	 * pathv  := platform_specific_path_to_the_local_office_distribution
	 * pipev  := local_office_connection_pipe_name
	 * </pre>
	 *
	 * @param url This is UNO URL which describes the type of a connection.
	 */
	public void setUnoUrl(String url)
		throws java.net.MalformedURLException
	{
		mURL	= null;

		String prefix = "uno:localoffice";
		if ( url.startsWith(prefix) )
			parseUnoUrlWithOfficePath( url, prefix );
		else
		{
			try
			{
				UnoUrl aURL = UnoUrl.parseUnoUrl( url );
				mProgramPath = null;
				mConnType = aURL.getConnection();
				mPipe = (String) aURL.getConnectionParameters().get( "pipe" );
				mPort = (String) aURL.getConnectionParameters().get( "port" );
				mProtocol = aURL.getProtocol();
				mInitialObject = aURL.getRootOid();
			}
			catch ( com.sun.star.lang.IllegalArgumentException eIll )
			{
				throw new java.net.MalformedURLException(
					"Invalid UNO connection URL.");
			}
		}
		mURL	= url;
	}

	/**
	 * Sets an AWT container factory.
	 *
	 * @param containerFactory This is a application provided AWT container
	 *	factory.
	 */
	public void setContainerFactory(ContainerFactory containerFactory)
	{
		mContainerFactory	= containerFactory;
	}

	/**
	 * Retrieves the UNO component context.
	 * Establishes a connection if necessary and initialises the
	 * UNO service manager if it has not already been initialised.
	 * This method can return <code>null</code> if it fails to connect
	 * to the office application.
	 *
	 * @return The office UNO component context.
	 */
	public XComponentContext getComponentContext()
	{
		if ( mContext == null )
			mContext = connect();
		return mContext;
	}

	/**
	 * Creates an office window.
	 * The window is either a sub-class of java.awt.Canvas (local) or
	 * java.awt.Container (RVP).
	 *
	 * @param container This is an AWT container.
	 * @return The office window instance.
	 */
	public OfficeWindow createOfficeWindow(Container container)
	{
		return new LocalOfficeWindow(this);
	}

	/**
	 * Closes the connection.
	 */
	public void dispose()
	{
		Iterator itr = mComponents.iterator();
		while (itr.hasNext() == true) {
			// ignore runtime exceptions in dispose
			try { ((XEventListener)itr.next()).disposing(null); }
			catch ( RuntimeException aExc ) {}
		}
		mComponents.clear();

		mContainerFactory = null;
		mContext = null;
	}

	/**
	 * Adds an event listener to the object.
	 *
	 * @param listener is a listener object.
	 */
	public void addEventListener(XEventListener listener)
	{
		mComponents.add(listener);
	}

	/**
	 * Removes an event listener from the listener list.
	 *
	 * @param listener is a listener object.
	 */
	public void removeEventListener(XEventListener listener)
	{
		mComponents.remove(listener);
	}

	/**
	 * Establishes the connection to the office.
	 */
	private XComponentContext connect()
	{
		try
		{
			// create default local component context
			XComponentContext xLocalContext =
				com.sun.star.comp.helper.Bootstrap.createInitialComponentContext(null);

			// initial serviceManager
			XMultiComponentFactory xLocalServiceManager = xLocalContext.getServiceManager();

			// create a urlresolver
			Object urlResolver = xLocalServiceManager.createInstanceWithContext(
				"com.sun.star.bridge.UnoUrlResolver", xLocalContext );

			// query for the XUnoUrlResolver interface
			XUnoUrlResolver xUrlResolver =
				(XUnoUrlResolver) UnoRuntime.queryInterface( XUnoUrlResolver.class, urlResolver );

			// try to connect to soffice
			Object aInitialObject = null;
			try
			{
				aInitialObject = xUrlResolver.resolve( mURL );
			}
			catch( com.sun.star.connection.NoConnectException e )
			{
				// launch soffice
				OfficeService aSOffice = new OfficeService();
				aSOffice.startupService();

				// wait until soffice is started
				long nMaxMillis = System.currentTimeMillis() + 1000*aSOffice.getStartupTime();
				while ( aInitialObject == null )
				{
					try
					{
						// try to connect to soffice
						Thread.currentThread().sleep( 500 );
						aInitialObject = xUrlResolver.resolve( mURL );
					}
					catch( com.sun.star.connection.NoConnectException aEx )
					{
						// soffice did not start in time
						if ( System.currentTimeMillis() > nMaxMillis )
							throw aEx;

					}
				}
			}
			finally
			{
			}

			// XComponentContext
			if( null != aInitialObject )
			{
				XPropertySet xPropertySet = (XPropertySet)
					UnoRuntime.queryInterface( XPropertySet.class, aInitialObject);
						Object xContext = xPropertySet.getPropertyValue("DefaultContext");
						XComponentContext xComponentContext = (XComponentContext) UnoRuntime.queryInterface(
					XComponentContext.class, xContext);
				return xComponentContext;
			}
		}
		catch( com.sun.star.connection.NoConnectException e )
		{
			System.out.println( "Couldn't connect to remote server" );
			System.out.println( e.getMessage() );
		}
		catch( com.sun.star.connection.ConnectionSetupException e )
		{
			System.out.println( "Couldn't access necessary local resource to establish the interprocess connection" );
			System.out.println( e.getMessage() );
		}
		catch( com.sun.star.lang.IllegalArgumentException e )
		{
			System.out.println( "uno-url is syntactical illegal ( " + mURL + " )" );
			System.out.println( e.getMessage() );
		}
		catch( com.sun.star.uno.RuntimeException e )
		{
			System.out.println( "--- RuntimeException:" );
			System.out.println( e.getMessage() );
			e.printStackTrace();
			System.out.println( "--- end." );
			throw e;
		}
		catch( java.lang.Exception e )
		{
			System.out.println( "java.lang.Exception: " );
			System.out.println( e );
			e.printStackTrace();
			System.out.println( "--- end." );
			throw new com.sun.star.uno.RuntimeException( e.toString() );
		}

		return null;
	}

	/**
	 * Retrieves a path to the office program folder.
	 *
	 * @return The path to the office program folder.
	 */
	private String getProgramPath()
	{
		if (mProgramPath == null)
		{
			// determine name of executable soffice
			String aExec = OFFICE_APP_NAME; // default for UNIX
			String aOS = System.getProperty("os.name");

			// running on Windows?
			if (aOS.startsWith("Windows"))
				aExec = OFFICE_APP_NAME + ".exe";

			// add other non-UNIX operating systems here
			// ...

			// find soffice executable relative to this class's class loader:
			File path = NativeLibraryLoader.getResource(
				this.getClass().getClassLoader(), aExec);
			if (path != null) {
				mProgramPath = path.getParent();
		}

			// default is ""
			if ( mProgramPath == null )
				mProgramPath = "";
		}
		return mProgramPath;
	}

	/**
	 * Parses a connection URL.
	 * This method accepts a UNO URL with following format:<br />
	 * <pre>
	 * url    := uno:localoffice[,&lt;params&gt;];urp;StarOffice.NamingService
	 * params := &lt;path&gt;[,&lt;pipe&gt;]
	 * path   := path=&lt;pathv&gt;
	 * pipe   := pipe=&lt;pipev&gt;
	 * pathv  := platform_specific_path_to_the_local_office_distribution
	 * pipev  := local_office_connection_pipe_name
	 * </pre>
	 *
	 * <h4>Examples</h4>
	 * <ul>
	 * 	<li>"uno:localoffice,pipe=xyz_Office,path=/opt/openoffice11/program;urp;StarOffice.ServiceManager";
	 * 	<li>"uno:socket,host=localhost,port=8100;urp;StarOffice.ServiceManager";
	 * </ul>
	 *
	 * @param url This is UNO URL which describes the type of a connection.
	 * @exception java.net.MalformedURLException when inappropriate URL was
	 *	provided.
	 */
	private void parseUnoUrlWithOfficePath(String url, String prefix)
		throws java.net.MalformedURLException
	{
		// Extract parameters.
		int	idx	= url.indexOf(";urp;StarOffice.NamingService");
		if (idx < 0)
			throw new java.net.MalformedURLException(
				"Invalid UNO connection URL.");
		String	params	= url.substring(prefix.length(), idx + 1);

		// Parse parameters.
		String	name	= null;
		String	path	= null;
		String	pipe	= null;
		char	ch;
		int		state	= 0;
		StringBuffer	buffer	= new StringBuffer();
		for(idx = 0; idx < params.length(); idx += 1) {
			ch	= params.charAt(idx);
			switch (state) {
			case 0:	// initial state
				switch(ch) {
				case ',':
					buffer.delete(0, buffer.length());
					state	= 1;
					break;

				case ';':
					state	= 7;
					break;

				default:
					buffer.delete(0, buffer.length());
					buffer.append(ch);
					state	= 1;
					break;
				}
				break;

			case 1:	// parameter name
				switch(ch) {
				case ' ':
				case '=':
					name	= buffer.toString();
					state	= (ch == ' ')? 2: 3;
					break;

				case ',':
				case ';':
					state	= -6;			// error: invalid name
					break;

				default:
					buffer.append(ch);
					break;
				}
				break;

			case 2:	// equal between the name and the value
				switch(ch) {
				case '=':
					state	= 3;
					break;

				case ' ':
					break;

				default:
					state	= -1;			// error: missing '='
					break;
				}
				break;

			case 3:	// value leading spaces
				switch(ch) {
				case ' ':
					break;

				default:
					buffer.delete(0, buffer.length());
					buffer.append(ch);
					state	= 4;
					break;
				}
				break;

			case 4:	// value
				switch(ch) {
				case ' ':
				case ',':
				case ';':
					idx 	-= 1;			// put back the last read character
					state	= 5;
					if (name.equals("path")) {
						if (path == null)
							path	= buffer.toString();
						else
							state	= -3;	// error: more then one 'path'
					} else if (name.equals("pipe")) {
						if (pipe == null)
							pipe	= buffer.toString();
						else
							state	= -4;	// error: more then one 'pipe'
					} else
						state	= -2;		// error: unknown parameter
					buffer.delete(0, buffer.length());
					break;

				default:
					buffer.append(ch);
					break;
				}
				break;

			case 5:	// a delimiter after the value
				switch(ch) {
				case ' ':
					break;

				case ',':
					state	= 6;
					break;

				case ';':
					state	= 7;
					break;

				default:
					state	= -5;			// error: ' ' inside the value
					break;
				}
				break;

			case 6:	// leading spaces before next parameter name
				switch(ch) {
				case ' ':
					break;

				default:
					buffer.delete(0, buffer.length());
					buffer.append(ch);
					state	= 1;
					break;
				}
				break;

			default:
				throw new java.net.MalformedURLException(
					"Invalid UNO connection URL.");
			}
		}
		if (state != 7)
			throw new java.net.MalformedURLException(
				"Invalid UNO connection URL.");

		// Set up the connection parameters.
		if (path != null)
			mProgramPath = path;
		if (pipe != null)
			mPipe = pipe;
	}

	/* replaces each substring aSearch in aString by aReplace.

		StringBuffer.replaceAll() is not available in Java 1.3.x.
	 */
	private static String replaceAll(String aString, String aSearch, String aReplace )
	{
		StringBuffer aBuffer = new StringBuffer(aString);

		int nPos = aString.length();
		int nOfs = aSearch.length();

		while ( ( nPos = aString.lastIndexOf( aSearch, nPos - 1 ) ) > -1 )
			aBuffer.replace( nPos, nPos+nOfs, aReplace );

		return aBuffer.toString();
	}


	/** creates a unique pipe name.
	*/
	static String getPipeName()
	{
		// turn user name into a URL and file system safe name (% chars will not work)
		String aPipeName = System.getProperty("user.name") + OFFICE_ID_SUFFIX;
		aPipeName = replaceAll( aPipeName, "_", "%B7" );
		return replaceAll( replaceAll( java.net.URLEncoder.encode(aPipeName), "\\+", "%20" ), "%", "_" );
	}

	/**
	 * @para This is an implementation of the native office service.
	 * @deprecated
	 */
	private class OfficeService
		implements NativeService
	{
		/**
		 * Retrieve the office service identifier.
		 *
		 * @return The identifier of the office service.
		 */
		public String getIdentifier()
		{
			if ( mPipe == null)
				return getPipeName();
			else
				return mPipe;
		}

		/**
		 * Starts the office process.
		 */
		public void startupService()
			throws java.io.IOException
		{
			// create call with arguments
			String[] cmdArray = new String[4];
			cmdArray[0] = (new File(getProgramPath(), OFFICE_APP_NAME)).getPath();
			cmdArray[1] = "-nologo";
			cmdArray[2] = "-nodefault";
			if ( mConnType.equals( "pipe" ) )
				cmdArray[3] = "-accept=pipe,name=" + getIdentifier() + ";" +
						  mProtocol + ";" + mInitialObject;
			else if ( mConnType.equals( "socket" ) )
				cmdArray[3] = "-accept=socket,port=" + mPort + ";urp";
			else
				throw new java.io.IOException( "not connection specified" );

			// start process
			mProcess = Runtime.getRuntime().exec(cmdArray);
			if ( mProcess == null )
				throw new RuntimeException( "cannot start soffice: " + cmdArray );
		}

		/**
		 * Retrieves the amount of time to wait for the startup.
		 *
		 * @return The amount of time to wait in seconds(?).
		 */
		public int getStartupTime()
		{
			return 60;
		}
	}
}