Bug 186913 [Regression]NPE throws out when open a older release product dataset 07]
Description: [Regression]NPE throws out when open a older release product dataset 07] Build number: 2.2.0.v20070515-0630 Steps to reproduce: 1, Open the attached report design 2, Choose one dataset and double click 3, Click OK button to update the dataset Expected result: The dataset update successfully without exceptions Actual result: NPE throws out Error log: java.lang.NullPointerException at org.eclipse.birt.report.data.oda.jdbc.ui.editors.SQLDataSetEditorPage.refreshPage(SQLDataSetEditorPage.java:1380) at org.eclipse.birt.report.data.oda.jdbc.ui.editors.SQLDataSetEditorPage.initializeControl(SQLDataSetEditorPage.java:272) at org.eclipse.birt.report.data.oda.jdbc.ui.editors.SQLDataSetEditorPage.createPageCustomControl(SQLDataSetEditorPage.java:191) at org.eclipse.datatools.connectivity.oda.design.ui.wizards.DataSetWizardPage.createControl(DataSetWizardPage.java:123) at org.eclipse.datatools.connectivity.oda.design.internal.ui.DataSetEditorPageCore.createContents(DataSetEditorPageCore.java:73) at org.eclipse.jface.preference.PreferencePage.createControl(PreferencePage.java:233) at org.eclipse.birt.report.designer.data.ui.dataset.PropertyPageWrapper.createPageControl(PropertyPageWrapper.java:45) at org.eclipse.birt.report.designer.data.ui.property.PropertyNode.createPageControl(PropertyNode.java:238) at org.eclipse.birt.report.designer.data.ui.dataset.DataSetEditor.populateDataSetEditor(DataSetEditor.java:623) at org.eclipse.birt.report.designer.data.ui.dataset.DataSetEditor.updateDataSetDesign(DataSetEditor.java:381) at org.eclipse.birt.report.designer.data.ui.dataset.DataSetParametersPage.performOk(DataSetParametersPage.java:848) at org.eclipse.birt.report.designer.data.ui.property.AbstractPropertyDialog.okPressed(AbstractPropertyDialog.java:608) at org.eclipse.birt.report.designer.data.ui.property.AbstractPropertyDialog.okPressed(AbstractPropertyDialog.java:593) at org.eclipse.birt.report.designer.data.ui.dataset.DataSetEditor.okPressed(DataSetEditor.java:504) at org.eclipse.birt.report.designer.data.ui.property.AbstractPropertyDialog.buttonPressed(AbstractPropertyDialog.java:475)
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
public void dispose( )
			{
			}
			public void inputChanged( Viewer viewer, Object oldInput,
					Object newInput )
			{
			}
		} );
		filterComboViewer.setLabelProvider( new LabelProvider( ) {
			public String getText( Object inputElement )
			{
				DbType dbType = (DbType) inputElement;
				return dbType.getName( );
			}
		} );
		filterComboViewer.setInput( dbTypeList );
		
		filterComboViewer.getCombo( ).select( 0 );
	}
	/**
	 * This method is invoked when the find button is clicked It populates the
	 * Available Data Base obecets ( in the Tree control )
	 */
	protected void populateAvailableDbObjects( )
	{
		DataSetDesign dataSetDesign = getDataSetDesign( );
		DataSourceDesign curDataSourceDesign = dataSetDesign.getDataSourceDesign( );
		if ( curDataSourceDesign == prevDataSourceDesign )
		{
			if ( ( cachedSearchTxt == searchTxt.getText( ) || ( cachedSearchTxt != null && cachedSearchTxt.equals( searchTxt.getText( ) ) ) )