Bug 204065 NPE throws out when open the attached flat file dataset
Description: [Regression]NPE throws out when open the attached flat file dataset Build number: 2.2.1.v20070920-0630 Steps to reproduce: 1, New a flat file datasource from a connction profile 2, New a flat file dataset 3, Open XML Source, clear all the local properties of connection and only left the connection profile's property 4, Go back to layout and open the flat file dataset Expected result: No exception occurs Actual result: NPE occurs and can not close the dialog by click OK BUTTON Error log: java.lang.NullPointerException at java.util.Hashtable.put(Hashtable.java:396) at org.eclipse.datatools.connectivity.oda.flatfile.ui.wizards.FileSelectionWizardPage.getResultSetMetaData(FileSelectionWizardPage.java:1149) at org.eclipse.datatools.connectivity.oda.flatfile.ui.wizards.FileSelectionWizardPage.savePage(FileSelectionWizardPage.java:1646) at org.eclipse.datatools.connectivity.oda.flatfile.ui.wizards.FileSelectionWizardPage.collectDataSetDesign(FileSelectionWizardPage.java:270) at org.eclipse.datatools.connectivity.oda.design.internal.ui.DataSetWizardPageCore.finishDataSetDesign(DataSetWizardPageCore.java:368) at org.eclipse.datatools.connectivity.oda.design.internal.ui.DataSetWizardBase.collectDataSetDesignFromPage(DataSetWizardBase.java:333) at org.eclipse.datatools.connectivity.oda.design.internal.ui.DataSetWizardBase.finishDataSetDesign(DataSetWizardBase.java:356) at org.eclipse.datatools.connectivity.oda.design.internal.ui.DataSetWizardBase.getResponseSession(DataSetWizardBase.java:105) at org.eclipse.datatools.connectivity.oda.design.internal.designsession.DataSetDesignSessionBase.finishDataSetDesign(DataSetDesignSessionBase.java:332) at org.eclipse.datatools.connectivity.oda.design.internal.designsession.DataSetDesignSessionBase.finish(DataSetDesignSessionBase.java:167) at org.eclipse.datatools.connectivity.oda.design.ui.designsession.DataSetDesignSession.finish(DataSetDesignSession.java:153) at org.eclipse.birt.report.designer.data.ui.dataset.DataSetEditor.updateDataSetDesign(DataSetEditor.java:460) at org.eclipse.birt.report.designer.data.ui.dataset.OutputColumnsPage.performOk(OutputColumnsPage.java:243) at org.eclipse.birt.report.designer.data.ui.property.AbstractPropertyDialog.okPressed(AbstractPropertyDialog.java:730) at org.eclipse.birt.report.designer.data.ui.property.AbstractPropertyDialog.okPressed(AbstractPropertyDialog.java:715) at org.eclipse.birt.report.designer.data.ui.dataset.DataSetEditor.okPressed(DataSetEditor.java:592) at org.eclipse.birt.report.designer.data.ui.property.AbstractPropertyDialog.buttonPressed(AbstractPropertyDialog.java:597) at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:616)
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/provider/JdbcMetaDataProvider.java
* (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.data.oda.jdbc.ui.provider.IMetadataProvider#getMetaData()
	 */
	public DatabaseMetaData getMetaData( )
	{
		if ( jdbcConnection == null )
		{
			return null;
		}
		if ( metaData == null )
		{
			try
			{
				metaData = jdbcConnection.getMetaData( );
			}
			catch ( SQLException e )
			{
				logger.log( Level.FINE, e.getMessage( ), e );
			}
		}
		return metaData;
	}
        
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.data.oda.jdbc.ui.provider.IMetadataProvider#getAllSchema()
	 */
	public ResultSet getAllSchema( )