Bug 190727 [regression]Default value issue when switch report parameter from textbox to listbox.[0705]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
else if ( DesignChoiceConstants.PARAM_TYPE_DECIMAL.equals( getSelectedDataType( ) ) )
		{
			return DataTypeUtil.toBigDecimal( value );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_DATETIME.equals( getSelectedDataType( ) ) )
		{
			return DataTypeUtil.toDate( value, ULocale.US );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_FLOAT.equals( getSelectedDataType( ) ) )
		{
			return DataTypeUtil.toDouble( value );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_INTEGER.equals( getSelectedDataType( ) ) )
		{
			return DataTypeUtil.toInteger( value );
		}
		return value;
	}
	private IChoiceSet getFormatChoiceSet( String type )
	{
		IChoiceSet choiceSet = null;
		if ( DesignChoiceConstants.PARAM_TYPE_STRING.equals( type ) )
		{
			choiceSet = DEUtil.getMetaDataDictionary( )
					.getChoiceSet( DesignChoiceConstants.CHOICE_STRING_FORMAT_TYPE );
		}
		else if ( DesignChoiceConstants.PARAM_TYPE_DATETIME.equals( type ) )
		{
			choiceSet = DEUtil.getMetaDataDictionary( )
					.getChoiceSet( DesignChoiceConstants.CHOICE_DATETIME_FORMAT_TYPE );