How to perform geodata transformation on a raster

static void setGeodataXformAndSaveAs(IRaster2 raster, IGeodataXform xform)throws
    Exception{
    //Get the original extent and cell size of the raster.
    IRasterProps rasterProp = (IRasterProps)raster;
    IEnvelope extent = rasterProp.getExtent();
    IPnt cellSize = rasterProp.meanCellSize();
    double[] xCell = {
        cellSize.getX()
    };
    double[] yCell = {
        cellSize.getY()
    };

    //Set the xform on the raster.
    raster.setGeodataXform(xform);

    //Transform the cell size first, then the extent; the sequence matters.
    xform.transformCellsize(esriTransformDirection.esriTransformForward, xCell,
        yCell, extent);
    xform.transformExtent(esriTransformDirection.esriTransformForward, extent);

    //Put the transformed extent and cell size on the raster and save as.
    rasterProp.setExtent(extent);
    rasterProp.setWidth((int)(extent.getWidth() / xCell[0]));
    rasterProp.setHeight((int)(extent.getHeight() / yCell[0]));

    //Save the raster.
    ISaveAs saveAs = new ISaveAsProxy(raster);
    saveAs.saveAs("c:/temp/image1.img", null, "IMAGINE Image");
}