examples/org.eclipse.rap.demo.controls/src/org/eclipse/rap/demo/controls/BrowserTab.java - rap/org.eclipse.rap - Git at Google

 /*******************************************************************************
  * Copyright (c) 2002, 2013 Innoopract Informationssysteme GmbH and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *    Innoopract Informationssysteme GmbH - initial API and implementation
  *    EclipseSource - ongoing development
  ******************************************************************************/

 package org.eclipse.rap.demo.controls;

 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.rap.rwt.RWT;
 import org.eclipse.rap.rwt.client.service.UrlLauncher;
 import org.eclipse.rap.rwt.widgets.BrowserCallback;
 import org.eclipse.rap.rwt.widgets.BrowserUtil;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.browser.Browser;
 import org.eclipse.swt.browser.BrowserFunction;
 import org.eclipse.swt.browser.ProgressEvent;
 import org.eclipse.swt.browser.ProgressListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.layout.FillLayout;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Text;

 final class BrowserTab extends ExampleTab {

   private static final String PROP_PROGRESS_LISTENER = "progressListener";

   private static final String DEFAULT_HTML
     = "<html>\n"
     + "<head>\n"
     + "<script type=\"text/javascript\">\n"
     + "  function show( msg ) {\n"
     + "    alert( msg );\n"
     + "}\n"
     + "</script>\n"
     + "</head>\n"
     + "<body>\n"
     + "  <p id=\"a\">Hello World</p>\n"
     + "</body>\n"
     + "</html>";

   private Browser browser;
   private BrowserFunction function;
   private boolean useBrowserCallback;

   public BrowserTab() {
     super( "Browser" );
   }

   @Override
   protected void createStyleControls( Composite parent ) {
     createStyleButton( "BORDER", SWT.BORDER );
     createVisibilityButton();
     createEnablementButton();
     createBgColorButton();
     createBgImageButton();
     createUrlAndHTMLSelector( parent );
     createPropertyCheckbox( "Add Progress Listener", PROP_PROGRESS_LISTENER );
     final Button cbUseBrowserCallback = new Button( parent, SWT.CHECK );
     cbUseBrowserCallback.setText( "Use BrowserCallback" );
     cbUseBrowserCallback.setSelection( useBrowserCallback );
     cbUseBrowserCallback.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( SelectionEvent event ) {
         useBrowserCallback = cbUseBrowserCallback.getSelection();
       }
     } );
     createExternalBrowserSelector( parent );
     createBrowserFunctionSelector( parent );
   }

   @Override
   protected void createExampleControls( Composite parent ) {
     parent.setLayout( new FillLayout() );
     browser = new Browser( parent, getStyle() );
     if( hasCreateProperty( PROP_PROGRESS_LISTENER ) ) {
       browser.addProgressListener( new ProgressListener() {
         public void changed( final ProgressEvent event ) {
           log( "changed: " + event );
         }

         public void completed( final ProgressEvent event ) {
           log( "completed: " + event );
         }
       } );
     }
     registerControl( browser );
   }

   private void createUrlAndHTMLSelector( Composite parent ) {
     Composite composite = new Composite( parent, SWT.NONE );
     composite.setLayout( new GridLayout( 3, false ) );
     Label lblURL = new Label( composite, SWT.NONE );
     lblURL.setText( "URL" );
     final Text txtURL = new Text( composite, SWT.BORDER );
     txtURL.setText( "http://eclipse.org/rap" );
     Button btnURL = new Button( composite, SWT.PUSH );
     btnURL.setText( "Go" );
     btnURL.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event ) {
         browser.setUrl( txtURL.getText() );
       }
     } );

     final Label lblHTML = new Label( composite, SWT.NONE );
     lblHTML.setText( "HTML" );
     lblHTML.setLayoutData( new GridData( GridData.VERTICAL_ALIGN_BEGINNING ) );
     final Text txtHTML = new Text( composite, SWT.BORDER | SWT.MULTI );
     txtHTML.setText( DEFAULT_HTML );
     txtHTML.setLayoutData( new GridData( 110, 100 ) );

     Button btnHTML = new Button( composite, SWT.PUSH );
     btnHTML.setText( "Go" );
     btnHTML.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event ) {
         browser.setText( txtHTML.getText() );
       }
     } );
     btnHTML.setLayoutData( new GridData( GridData.VERTICAL_ALIGN_BEGINNING ) );

     Label lblExecute = new Label( composite, SWT.NONE );
     lblExecute.setText( "Execute" );
     final Text txtExecute = new Text( composite, SWT.BORDER );
     Button btnExecButton = new Button( composite, SWT.PUSH );
     btnExecButton.setText( "Go" );
     btnExecButton.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event ) {
         if( useBrowserCallback ) {
           BrowserCallback browserCallback = new BrowserCallback() {
             public void evaluationSucceeded( Object result ) {
               log( "Execution was successful." );
             }
             public void evaluationFailed( Exception exception ) {
               log( "Execution was not successful." );
             }
           };
           BrowserUtil.evaluate( browser, txtExecute.getText(), browserCallback );
         } else {
           boolean result = browser.execute( txtExecute.getText() );
           String msg = result
                      ? "Execution was successful."
                      : "Execution was not successful.";
           log( msg );
         }
       }
     });
   }

   private void createExternalBrowserSelector( Composite parent ) {
     Group group = new Group( parent, SWT.NONE );
     group.setLayout( new GridLayout( 2, false ) );
     group.setText( "UrlLauncher" );
     Label lblUrl = new Label( group, SWT.NONE );
     lblUrl.setText( "URL" );
     final Text txtUrl = new Text( group, SWT.BORDER );
     txtUrl.setLayoutData( grapExcessHorizontalSpace() );
     txtUrl.setText( "http://eclipse.org/rap" );
     Button btnOpen = new Button( group, SWT.PUSH );
     btnOpen.setLayoutData( horizontalSpan2() );
     btnOpen.setText( "openURL( url )" );
     btnOpen.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( SelectionEvent event ) {
         UrlLauncher service = RWT.getClient().getService( UrlLauncher.class );
         if( service != null ) {
           service.openURL( txtUrl.getText() );
         }
       }
     } );
     Button btnMailTo = new Button( group, SWT.PUSH );
     btnMailTo.setText( "mailto:..." );
     btnMailTo.setLayoutData( horizontalSpan2() );
     btnMailTo.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event ) {
         UrlLauncher service = RWT.getClient().getService( UrlLauncher.class );
         if( service != null ) {
           service.openURL( "mailto:someone@nowhere.org" );
         }
       }
     } );
   }

   private void createBrowserFunctionSelector( Composite parent ) {
     Group group = new Group( parent, SWT.NONE );
     group.setText( "BrowserFunction" );
     group.setLayout( new GridLayout( 3, false ) );
     final Label lblHTML = new Label( group, SWT.NONE );
     lblHTML.setText( "HTML" );
     lblHTML.setLayoutData( new GridData( GridData.VERTICAL_ALIGN_BEGINNING ) );
     final Text txtHTML = new Text( group, SWT.BORDER | SWT.MULTI );
     txtHTML.setText( createBrowserFunctionHTML() );
     txtHTML.setLayoutData( new GridData( 200, 200 ) );

     Button btnHTML = new Button( group, SWT.PUSH );
     btnHTML.setText( "Go" );
     btnHTML.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event ) {
         browser.setText( txtHTML.getText() );
         function = new CustomFunction( browser, "theJavaFunction" );
       }
     } );
     btnHTML.setLayoutData( new GridData( GridData.VERTICAL_ALIGN_BEGINNING ) );
     GridData buttonsGridData = new GridData();
     buttonsGridData.horizontalSpan = 3;
     Button createButton = new Button( group, SWT.PUSH );
     createButton.setLayoutData( buttonsGridData );
     createButton.setText( "Create theJavaFunction" );
     createButton.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event) {
         function = new CustomFunction( browser, "theJavaFunction" );
       }
     } );
     Button disposeButton = new Button( group, SWT.PUSH );
     disposeButton.setLayoutData( buttonsGridData );
     disposeButton.setText( "Dispose theJavaFunction" );
     disposeButton.addSelectionListener( new SelectionAdapter() {
       @Override
       public void widgetSelected( final SelectionEvent event) {
         function.dispose();
       }
     } );
   }

   private static GridData horizontalSpan2() {
     GridData result = new GridData();
     result.horizontalSpan = 2;
     return result;
   }

   private static GridData grapExcessHorizontalSpace() {
     GridData result = new GridData( SWT.FILL, SWT.CENTER, true, false );
 //    result.grabExcessHorizontalSpace = true;
     return result;
   }

   private String createBrowserFunctionHTML() {
     StringBuffer buffer = new StringBuffer();
     buffer.append( "<html>\n" );
     buffer.append( "<head>\n" );
     buffer.append( "<script language=\"JavaScript\">\n" );
     buffer.append( "function function1() {\n" );
     buffer.append( "    var result;\n" );
     buffer.append( "    try {\n" );
     buffer.append( "        result = theJavaFunction(12, false, null, [3.6, ['swt', true]], 'eclipse');\n" );
     buffer.append( "    } catch (e) {\n" );
     buffer.append( "        alert('a java error occurred: ' + e.message);\n" );
     buffer.append( "        return;\n" );
     buffer.append( "    }\n" );
 //    buffer.append( "    for (var i = 0; i < result.length; i++) {\n" );
 //    buffer.append( "        alert('returned ' + i + ': ' + result[i]);\n" );
 //    buffer.append( "    }\n" );
     buffer.append( "}\n" );
     buffer.append( "</script>\n" );
     buffer.append( "</head>\n" );
     buffer.append( "<body>\n" );
     buffer.append( "<input id=button type=\"button\" value=\"Push to Invoke Java\" onclick=\"function1();\">\n" );
     buffer.append( "</body>\n" );
     buffer.append( "</html>\n" );
     return buffer.toString();
   }

   private class CustomFunction extends BrowserFunction {

     CustomFunction( Browser browser, String name ) {
       super( browser, name );
     }

     @Override
     public Object function( Object[] arguments ) {
       StringBuffer buffer = new StringBuffer();
       buffer.append( "theJavaFunction() called from javascript with args:\n" );
       dumpArguments( arguments, "", buffer );
       String title = "BrowserFunction called";
       MessageDialog.openInformation( getShell(), title, buffer.toString() );

       Object returnValue = new Object[]{
         new Short( ( short )3 ),
         new Boolean( true ),
         null,
         new Object[] { "a string", new Boolean( false ) },
         "hi",
         new Float( 2.0f / 3.0f )
       };
       //int z = 3 / 0; // uncomment to cause a java error instead
       return returnValue;
     }

     private void dumpArguments( Object[] arguments, String tabString, StringBuffer buffer ) {
       String tab = tabString + "    ";
       for( int i = 0; i < arguments.length; i++ ) {
         Object arg = arguments[ i ];
         if( arg == null ) {
           buffer.append( tab );
           buffer.append( "-->null\n" );
         } else {
           buffer.append( tab );
           buffer.append( "-->" );
           buffer.append( arg.getClass().getName() );
           buffer.append( ": " );
           buffer.append( arg.toString() );
           buffer.append( "\n" );
           if( arg.getClass().isArray() ) {
             Object[] arg1 = ( Object[] )arg;
             dumpArguments( arg1, tab, buffer );
           }
         }
       }
     }
   }
 }
	/*******************************************************************************
	* Copyright (c) 2002, 2013 Innoopract Informationssysteme GmbH and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Innoopract Informationssysteme GmbH - initial API and implementation
	* EclipseSource - ongoing development
	******************************************************************************/

	package org.eclipse.rap.demo.controls;

	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.rap.rwt.RWT;
	import org.eclipse.rap.rwt.client.service.UrlLauncher;
	import org.eclipse.rap.rwt.widgets.BrowserCallback;
	import org.eclipse.rap.rwt.widgets.BrowserUtil;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.browser.Browser;
	import org.eclipse.swt.browser.BrowserFunction;
	import org.eclipse.swt.browser.ProgressEvent;
	import org.eclipse.swt.browser.ProgressListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.layout.FillLayout;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Text;

	final class BrowserTab extends ExampleTab {

	private static final String PROP_PROGRESS_LISTENER = "progressListener";

	private static final String DEFAULT_HTML
	= "<html>\n"
	+ "<head>\n"
	+ "<script type=\"text/javascript\">\n"
	+ " function show( msg ) {\n"
	+ " alert( msg );\n"
	+ "}\n"
	+ "</script>\n"
	+ "</head>\n"
	+ "<body>\n"
	+ " <p id=\"a\">Hello World</p>\n"
	+ "</body>\n"
	+ "</html>";

	private Browser browser;
	private BrowserFunction function;
	private boolean useBrowserCallback;

	public BrowserTab() {
	super( "Browser" );
	}

	@Override
	protected void createStyleControls( Composite parent ) {
	createStyleButton( "BORDER", SWT.BORDER );
	createVisibilityButton();
	createEnablementButton();
	createBgColorButton();
	createBgImageButton();
	createUrlAndHTMLSelector( parent );
	createPropertyCheckbox( "Add Progress Listener", PROP_PROGRESS_LISTENER );
	final Button cbUseBrowserCallback = new Button( parent, SWT.CHECK );
	cbUseBrowserCallback.setText( "Use BrowserCallback" );
	cbUseBrowserCallback.setSelection( useBrowserCallback );
	cbUseBrowserCallback.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( SelectionEvent event ) {
	useBrowserCallback = cbUseBrowserCallback.getSelection();
	}
	} );
	createExternalBrowserSelector( parent );
	createBrowserFunctionSelector( parent );
	}

	@Override
	protected void createExampleControls( Composite parent ) {
	parent.setLayout( new FillLayout() );
	browser = new Browser( parent, getStyle() );
	if( hasCreateProperty( PROP_PROGRESS_LISTENER ) ) {
	browser.addProgressListener( new ProgressListener() {
	public void changed( final ProgressEvent event ) {
	log( "changed: " + event );
	}

	public void completed( final ProgressEvent event ) {
	log( "completed: " + event );
	}
	} );
	}
	registerControl( browser );
	}

	private void createUrlAndHTMLSelector( Composite parent ) {
	Composite composite = new Composite( parent, SWT.NONE );
	composite.setLayout( new GridLayout( 3, false ) );
	Label lblURL = new Label( composite, SWT.NONE );
	lblURL.setText( "URL" );
	final Text txtURL = new Text( composite, SWT.BORDER );
	txtURL.setText( "http://eclipse.org/rap" );
	Button btnURL = new Button( composite, SWT.PUSH );
	btnURL.setText( "Go" );
	btnURL.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event ) {
	browser.setUrl( txtURL.getText() );
	}
	} );

	final Label lblHTML = new Label( composite, SWT.NONE );
	lblHTML.setText( "HTML" );
	lblHTML.setLayoutData( new GridData( GridData.VERTICAL_ALIGN_BEGINNING ) );
	final Text txtHTML = new Text( composite, SWT.BORDER \| SWT.MULTI );
	txtHTML.setText( DEFAULT_HTML );
	txtHTML.setLayoutData( new GridData( 110, 100 ) );

	Button btnHTML = new Button( composite, SWT.PUSH );
	btnHTML.setText( "Go" );
	btnHTML.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event ) {
	browser.setText( txtHTML.getText() );
	}
	} );
	btnHTML.setLayoutData( new GridData( GridData.VERTICAL_ALIGN_BEGINNING ) );

	Label lblExecute = new Label( composite, SWT.NONE );
	lblExecute.setText( "Execute" );
	final Text txtExecute = new Text( composite, SWT.BORDER );
	Button btnExecButton = new Button( composite, SWT.PUSH );
	btnExecButton.setText( "Go" );
	btnExecButton.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event ) {
	if( useBrowserCallback ) {
	BrowserCallback browserCallback = new BrowserCallback() {
	public void evaluationSucceeded( Object result ) {
	log( "Execution was successful." );
	}
	public void evaluationFailed( Exception exception ) {
	log( "Execution was not successful." );
	}
	};
	BrowserUtil.evaluate( browser, txtExecute.getText(), browserCallback );
	} else {
	boolean result = browser.execute( txtExecute.getText() );
	String msg = result
	? "Execution was successful."
	: "Execution was not successful.";
	log( msg );
	}
	}
	});
	}

	private void createExternalBrowserSelector( Composite parent ) {
	Group group = new Group( parent, SWT.NONE );
	group.setLayout( new GridLayout( 2, false ) );
	group.setText( "UrlLauncher" );
	Label lblUrl = new Label( group, SWT.NONE );
	lblUrl.setText( "URL" );
	final Text txtUrl = new Text( group, SWT.BORDER );
	txtUrl.setLayoutData( grapExcessHorizontalSpace() );
	txtUrl.setText( "http://eclipse.org/rap" );
	Button btnOpen = new Button( group, SWT.PUSH );
	btnOpen.setLayoutData( horizontalSpan2() );
	btnOpen.setText( "openURL( url )" );
	btnOpen.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( SelectionEvent event ) {
	UrlLauncher service = RWT.getClient().getService( UrlLauncher.class );
	if( service != null ) {
	service.openURL( txtUrl.getText() );
	}
	}
	} );
	Button btnMailTo = new Button( group, SWT.PUSH );
	btnMailTo.setText( "mailto:..." );
	btnMailTo.setLayoutData( horizontalSpan2() );
	btnMailTo.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event ) {
	UrlLauncher service = RWT.getClient().getService( UrlLauncher.class );
	if( service != null ) {
	service.openURL( "mailto:someone@nowhere.org" );
	}
	}
	} );
	}

	private void createBrowserFunctionSelector( Composite parent ) {
	Group group = new Group( parent, SWT.NONE );
	group.setText( "BrowserFunction" );
	group.setLayout( new GridLayout( 3, false ) );
	final Label lblHTML = new Label( group, SWT.NONE );
	lblHTML.setText( "HTML" );
	lblHTML.setLayoutData( new GridData( GridData.VERTICAL_ALIGN_BEGINNING ) );
	final Text txtHTML = new Text( group, SWT.BORDER \| SWT.MULTI );
	txtHTML.setText( createBrowserFunctionHTML() );
	txtHTML.setLayoutData( new GridData( 200, 200 ) );

	Button btnHTML = new Button( group, SWT.PUSH );
	btnHTML.setText( "Go" );
	btnHTML.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event ) {
	browser.setText( txtHTML.getText() );
	function = new CustomFunction( browser, "theJavaFunction" );
	}
	} );
	btnHTML.setLayoutData( new GridData( GridData.VERTICAL_ALIGN_BEGINNING ) );
	GridData buttonsGridData = new GridData();
	buttonsGridData.horizontalSpan = 3;
	Button createButton = new Button( group, SWT.PUSH );
	createButton.setLayoutData( buttonsGridData );
	createButton.setText( "Create theJavaFunction" );
	createButton.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event) {
	function = new CustomFunction( browser, "theJavaFunction" );
	}
	} );
	Button disposeButton = new Button( group, SWT.PUSH );
	disposeButton.setLayoutData( buttonsGridData );
	disposeButton.setText( "Dispose theJavaFunction" );
	disposeButton.addSelectionListener( new SelectionAdapter() {
	@Override
	public void widgetSelected( final SelectionEvent event) {
	function.dispose();
	}
	} );
	}

	private static GridData horizontalSpan2() {
	GridData result = new GridData();
	result.horizontalSpan = 2;
	return result;
	}

	private static GridData grapExcessHorizontalSpace() {
	GridData result = new GridData( SWT.FILL, SWT.CENTER, true, false );
	// result.grabExcessHorizontalSpace = true;
	return result;
	}

	private String createBrowserFunctionHTML() {
	StringBuffer buffer = new StringBuffer();
	buffer.append( "<html>\n" );
	buffer.append( "<head>\n" );
	buffer.append( "<script language=\"JavaScript\">\n" );
	buffer.append( "function function1() {\n" );
	buffer.append( " var result;\n" );
	buffer.append( " try {\n" );
	buffer.append( " result = theJavaFunction(12, false, null, [3.6, ['swt', true]], 'eclipse');\n" );
	buffer.append( " } catch (e) {\n" );
	buffer.append( " alert('a java error occurred: ' + e.message);\n" );
	buffer.append( " return;\n" );
	buffer.append( " }\n" );
	// buffer.append( " for (var i = 0; i < result.length; i++) {\n" );
	// buffer.append( " alert('returned ' + i + ': ' + result[i]);\n" );
	// buffer.append( " }\n" );
	buffer.append( "}\n" );
	buffer.append( "</script>\n" );
	buffer.append( "</head>\n" );
	buffer.append( "<body>\n" );
	buffer.append( "<input id=button type=\"button\" value=\"Push to Invoke Java\" onclick=\"function1();\">\n" );
	buffer.append( "</body>\n" );
	buffer.append( "</html>\n" );
	return buffer.toString();
	}

	private class CustomFunction extends BrowserFunction {

	CustomFunction( Browser browser, String name ) {
	super( browser, name );
	}

	@Override
	public Object function( Object[] arguments ) {
	StringBuffer buffer = new StringBuffer();
	buffer.append( "theJavaFunction() called from javascript with args:\n" );
	dumpArguments( arguments, "", buffer );
	String title = "BrowserFunction called";
	MessageDialog.openInformation( getShell(), title, buffer.toString() );

	Object returnValue = new Object[]{
	new Short( ( short )3 ),
	new Boolean( true ),
	null,
	new Object[] { "a string", new Boolean( false ) },
	"hi",
	new Float( 2.0f / 3.0f )
	};
	//int z = 3 / 0; // uncomment to cause a java error instead
	return returnValue;
	}

	private void dumpArguments( Object[] arguments, String tabString, StringBuffer buffer ) {
	String tab = tabString + " ";
	for( int i = 0; i < arguments.length; i++ ) {
	Object arg = arguments[ i ];
	if( arg == null ) {
	buffer.append( tab );
	buffer.append( "-->null\n" );
	} else {
	buffer.append( tab );
	buffer.append( "-->" );
	buffer.append( arg.getClass().getName() );
	buffer.append( ": " );
	buffer.append( arg.toString() );
	buffer.append( "\n" );
	if( arg.getClass().isArray() ) {
	Object[] arg1 = ( Object[] )arg;
	dumpArguments( arg1, tab, buffer );
	}
	}
	}
	}
	}
	}