Difference between revisions of "Groovy UNO Extension"

Revision as of 16:23, 28 February 2016

Overview

This is an Apache Groovy language extension of the Java UNO API's and should not be confused with GroovyForOpenOffice which is an OpenOffice extension added to OpenOffice itself. The artifact of this extension is a Java jar file that when used in a Groovy script or class adds convenience methods to the regular Java UNO API's.

The goal of the Groovy UNO Extension is to allow UNO programming that is less verbose than using the Java UNO API's alone.

These methods are implemented using Groovy Extension Modules. An extension module allows you to add new methods to existing classes, including classes which are precompiled, like classes from the JDK or in this case Java UNO classes. These new methods, unlike those defined through a metaclass or using a category, are available globally.

Aside from a few general methods, initial efforts have been on enhancing the spreadsheet API's and future work will be on enhancing the other applications.

Getting Started

The Extension is a Gradle based project and information about checking it out of Apache SVN can be found on the OpenOffice_Gradle_Integration page.

Usage

The best way to explain the differences between the Java UNO API's and using Groovy with and without the extension is with some example code. Many of the examples are from SCalc.java that is included with the AOO SDK.

Get the first sheet in the spreadsheet document and insert data into a cell
The example leaves out the try/catch for brevity and assumes we have a reference to XSpreadsheetDocument myDoc..
Java way

XSpreadsheets xSheets = myDoc.getSheets() ;
XIndexAccess oIndexSheets = (XIndexAccess) UnoRuntime.queryInterface(
    XIndexAccess.class, xSheets);
xSheet = (XSpreadsheet) UnoRuntime.queryInterface(
   XSpreadsheet.class, oIndexSheets.getByIndex(0));
xCell = xSheet.getCellByPosition(1,0);
xCell.setFormula("Sample");

Groovy Extension way

XSpreadsheet xSheet = myDoc.getSheetByIndex(0)
xSheet.setTextToCell(1,0,"Sample")

Using Groovy without the extension allows removing the Interface cast on the right side and not using semi-colons.
The following examples are in that style and other than that, similar to the Java way.

Setting the Cell Style property
The extension adds a setter method for CellStyle allowing what looks like property access to cellStyle. (ToDo add getter method)
Without Extension

XPropertySet xCellProps = UnoRuntime.queryInterface(XPropertySet.class, xCell)
xCellProps.setPropertyValue("CellStyle", "Result")

With extension

   xCell.cellStyle = "Result"

Using Enum Types
The extension adds getter and setter methods for CellVertJustify allowing what looks like property access to vertJustify.
Without extension

xCellProps.setPropertyValue("VertJustify", com.sun.star.table.CellVertJustify.TOP)

With extension

xCell.vertJustify = com.sun.star.table.CellVertJustify.TOP

Setting the active sheet
Without Extension but using SpreadsheetDocHelper.groovy included with the OpenOffice_Gradle_Integration aoo-client template.

XModel xSpreadsheetModel = sdHelper.getModel()
XController xSpreadsheetController = xSpreadsheetModel.getCurrentController()
XSpreadsheetView xSpreadsheetView = UnoRuntime.queryInterface(XSpreadsheetView.class, xSpreadsheetController)
xSpreadsheetView.setActiveSheet(xSpreadsheet)

With extension and a SpreadsheetDocHelper.groovy method to get the XSpreadsheetView directly

XSpreadsheetView xSpreadsheetView = sdHelper.getSpreadsheetView()
xSpreadsheetView.setActiveSheet(xSpreadsheet)

Get cell ranges
Without extension

XCellRangesQuery xCellQuery = UnoRuntime.queryInterface(XCellRangesQuery.class, xSpreadsheet)
XSheetCellRanges xFormulaCells = xCellQuery.queryContentCells((short)CellFlags.FORMULA)

With extension

XSheetCellRanges xFormulaCells = xSpreadsheet.getCellRanges(CellFlags.FORMULA)

Use of XEnumerationAccess
Without extension we get an Enumeration and use it iterate through Cells

XEnumerationAccess xFormulas = xFormulaCells.getCells()
XEnumeration xFormulaEnum = xFormulas.createEnumeration()
while (xFormulaEnum.hasMoreElements()) {
    Object formulaCell = xFormulaEnum.nextElement()
    xCell = UnoRuntime.queryInterface(XCell.class, formulaCell)
    XCellAddressable xCellAddress = UnoRuntime.queryInterface(XCellAddressable.class, xCell)
    println("Formula cell in column " +
        xCellAddress.getCellAddress().Column + ", row " + xCellAddress.getCellAddress().Row
        + " contains " + xCell.getFormula())
}

With extension we can use a List provided by a new method and a closure to iterate through each cell

XCell[] cellList = xFormulaCells.cellList
cellList.each() {println("Formula cell in column ${it.address.Column}, " + 
    "row ${it.address.Row} contains ${it.formula}")
}

Create a new cell range container, add all cells that are filled, and iterate through them
Without Extension

com.sun.star.lang.XMultiServiceFactory xDocFactory = UnoRuntime.queryInterface(
    com.sun.star.lang.XMultiServiceFactory.class, xSpreadsheetDocument)
com.sun.star.sheet.XSheetCellRangeContainer xRangeCont = UnoRuntime.queryInterface(
    com.sun.star.sheet.XSheetCellRangeContainer.class,
    xDocFactory.createInstance("com.sun.star.sheet.SheetCellRanges"));
xRangeCont.addRangeAddresses(xCellRanges.rangeAddresses, false)
print("All filled cells: ")
com.sun.star.container.XEnumerationAccess xCellsEA = xRangeCont.getCells()
com.sun.star.container.XEnumeration xEnum = xCellsEA.createEnumeration()          
while (xEnum.hasMoreElements()) {
    Object aCellObj = xEnum.nextElement()
    com.sun.star.sheet.XCellAddressable xAddr = UnoRuntime.queryInterface(
        com.sun.star.sheet.XCellAddressable.class, aCellObj)
    com.sun.star.table.CellAddress aAddr = xAddr.getCellAddress()
    println(sdHelper.getCellAddressString(aAddr.Column, aAddr.Row) + " ")
}

With extension

XSheetCellRangeContainer xRangeCont = xSpreadsheetDocument.rangeContainer
XSheetCellRanges xCellRanges = xSpreadsheet.getCellRanges(1023)
XCell[] cellList2 = xRangeCont.cellList
print("All filled cells: ")
cellList2.each() {println("Formula cell in column ${it.address.Column}, " + 
    "row ${it.address.Row} contains ${it.formula}")
}

Difference between revisions of "Groovy UNO Extension"

Revision as of 16:23, 28 February 2016

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