Hi,

gmane.comp.openoffice.devel.general discussion: "Compairing text content
positions with each other"


Exact Problem:
XTextRangeCompare throws following exception when compairing two XTextRanges of
XTables:

>Exception occurred in target VM:
com.sun.star.lang.IllegalArgumentException:
at com.sun.star.bridges.jni_uno.JNI_proxy.dispatch_call(Native Method)
at com.sun.star.bridges.jni_uno.JNI_proxy.invoke(JNI_proxy.java:178)
at $Proxy35.compareRegionStarts(Unknown Source)
at ast.structure.ElementController.checkTextTable(ElementController.java:939)
at ast.structure.ElementController.analyze(ElementController.java:980)
at ast.BesserWissA.dispatch(BesserWissA.java:408)
< 


Explanation of code:
In this testcode Ive written some hardcode to read exactly two tables out of a
writer document. I get the tables via a table supplier and get there ranges by
using getAnchor() of each XTable. I put the anchors for compairing to a
XTextRangeCompare object using compareRegionStarts() and that throws an
IllegalArgumentException.

Ive checked out the XTextRange object by getAnchor(). Most members are set to
null, just object members are not. But the members of that objects are null
again. So the XTextRange I ve got is invalid in my eyes.


Code:


XComponentContext m_aComponentContext; // given
XMultiComponentFactory m_aMCF = m_aComponentContext.getServiceManager();

Object desktop = null;
try
{
  desktop = m_aMCF.createInstanceWithContext("com.sun.star.frame.Desktop",
    m_aComponentContext);
}
catch(Exception ex)
{
}

XDesktop xDesktop = (XDesktop) UnoRuntime.queryInterface(
  XDesktop.class, desktop);
XComponent xComponent = xDesktop.getCurrentComponent();

XTextTablesSupplier xTextTablesSupplier = (XTextTablesSupplier) UnoRuntime.
  queryInterface(XTextTablesSupplier.class, xComponent);
XNameAccess xNamedTables = xTextTablesSupplier.getTextTables();

String[] tableNames = xNamedTables.getElementNames();
XTextRange[] myRanges = new XTextRange[2];

System.out.println(
  "compairing ranges of " + tableNames[0] + " & " + tableNames[1]);

// just read out first two tables
for(int k = 0; k < 2 k++)
{
  XTextTable table = null;
  XTextContent xTC = null;
  try
  {
    Object obj = xNamedTables.getByName(tableNames[k]);
    table = (XTextTable) UnoRuntime.queryInterface(XTextTable.class, obj);
  }
  catch(Exception ex)
  {
  }

  //myRanges[k] = table.getAnchor().getStart(); // same problem here, same exc
   
  myRanges[k] = table.getAnchor();
   
}

XTextRangeCompare xTextRangeCompare = (XTextRangeCompare) UnoRuntime.
  queryInterface(XTextRangeCompare.class, m_textDoc.getText());
int k = -1000;
try
{
  k = xTextRangeCompare.compareRegionStarts(myRanges[0], myRanges[1]);
}
catch(IllegalArgumentException ex)
{
}

System.out.println(k);