/// <summary>Flushes all modified objects which have not been flushed yet.</summary>
/// <remarks>Flushes all modified objects which have not been flushed yet. Used in case incremental updates.</remarks>
/// <param name="forbiddenToFlush">
/// a
/// <see cref="Java.Util.Set{E}"/>
/// of
/// <see cref="PdfIndirectReference">references</see>
/// that are forbidden to be flushed automatically.
/// </param>
protected internal virtual void FlushModifiedWaitingObjects(ICollection <PdfIndirectReference> forbiddenToFlush
)
{
PdfXrefTable xref = document.GetXref();
for (int i = 1; i < xref.Size(); i++)
{
PdfIndirectReference indirectReference = xref.Get(i);
if (null != indirectReference && !indirectReference.IsFree() && !forbiddenToFlush.Contains(indirectReference
))
{
bool isModified = indirectReference.CheckState(PdfObject.MODIFIED);
if (isModified)
{
PdfObject obj = indirectReference.GetRefersTo(false);
if (obj != null)
{
if (!obj.Equals(objectStream))
{
obj.Flush();
}
}
}
}
}
if (objectStream != null && objectStream.GetSize() > 0)
{
objectStream.Flush();
objectStream = null;
}
}
/// <summary>Flushes all objects which have not been flushed yet.</summary>
/// <param name="forbiddenToFlush">
/// a
/// <see cref="Java.Util.Set{E}"/>
/// of
/// <see cref="PdfIndirectReference">references</see>
/// that are forbidden to be flushed automatically.
/// </param>
protected internal virtual void FlushWaitingObjects(ICollection <PdfIndirectReference> forbiddenToFlush)
{
PdfXrefTable xref = document.GetXref();
bool needFlush = true;
while (needFlush)
{
needFlush = false;
for (int i = 1; i < xref.Size(); i++)
{
PdfIndirectReference indirectReference = xref.Get(i);
if (indirectReference != null && !indirectReference.IsFree() && indirectReference.CheckState(PdfObject.MUST_BE_FLUSHED
) && !forbiddenToFlush.Contains(indirectReference))
{
PdfObject obj = indirectReference.GetRefersTo(false);
if (obj != null)
{
obj.Flush();
needFlush = true;
}
}
}
}
if (objectStream != null && objectStream.GetSize() > 0)
{
objectStream.Flush();
objectStream = null;
}
}
public virtual void CheckNumberOfIndirectObjectsWithRandomNumbersTest()
{
PdfXrefTable table = new PdfXrefTable();
int numberOfReferences = 10;
for (int i = 0; i < numberOfReferences; i++)
{
table.Add(new PdfIndirectReference(null, i * 25));
}
NUnit.Framework.Assert.AreEqual(numberOfReferences, table.GetCountOfIndirectObjects());
NUnit.Framework.Assert.AreEqual(226, table.Size());
}
public virtual void TestCreateAndUpdateTwiceXMP()
{
String created = destinationFolder + "testCreateAndUpdateTwiceXMP_create.pdf";
String updated = destinationFolder + "testCreateAndUpdateTwiceXMP_update.pdf";
String updatedAgain = destinationFolder + "testCreateAndUpdateTwiceXMP_updatedAgain.pdf";
PdfDocument pdfDocument = new PdfDocument(new PdfWriter(created));
pdfDocument.AddNewPage();
pdfDocument.GetXmpMetadata(true);
// create XMP metadata
pdfDocument.Close();
pdfDocument = new PdfDocument(new PdfReader(created), new PdfWriter(updated));
PdfDictionary catalog = pdfDocument.GetCatalog().GetPdfObject();
((PdfIndirectReference)catalog.Remove(PdfName.Metadata)).SetFree();
pdfDocument.Close();
pdfDocument = new PdfDocument(new PdfReader(updated), new PdfWriter(updatedAgain));
catalog = pdfDocument.GetCatalog().GetPdfObject();
((PdfIndirectReference)catalog.Remove(PdfName.Metadata)).SetFree();
PdfXrefTable xref = pdfDocument.GetXref();
PdfIndirectReference ref0 = xref.Get(0);
PdfIndirectReference freeRef1 = xref.Get(6);
PdfIndirectReference freeRef2 = xref.Get(7);
pdfDocument.Close();
/*
* Current xref structure:
* xref
* 0 9
* 0000000006 65535 f % this is object 0; 6 refers to free object 6
* 0000000203 00000 n
* 0000000510 00000 n
* 0000000263 00000 n
* 0000000088 00000 n
* 0000000015 00000 n
* 0000000007 00001 f % this is object 6; 7 refers to free object 7; note generation number
* 0000000000 00001 f % this is object 7; 0 refers to free object 0; note generation number
* 0000000561 00000 n
*/
NUnit.Framework.Assert.IsTrue(freeRef1.IsFree());
NUnit.Framework.Assert.AreEqual(ref0.offsetOrIndex, freeRef1.objNr);
NUnit.Framework.Assert.AreEqual(1, freeRef1.genNr);
NUnit.Framework.Assert.IsTrue(freeRef2.IsFree());
NUnit.Framework.Assert.AreEqual(freeRef1.offsetOrIndex, freeRef2.objNr);
NUnit.Framework.Assert.AreEqual(1, freeRef2.genNr);
pdfDocument.Close();
}
public virtual void CheckNumberOfIndirectObjectsWithFreeReferencesTest()
{
PdfXrefTable table = new PdfXrefTable();
int numberOfReferences = 10;
for (int i = 0; i < numberOfReferences; i++)
{
table.Add(new PdfIndirectReference(null, i + 1));
}
table.InitFreeReferencesList(null);
int freeReferenceNumber = 5;
table.FreeReference(table.Get(freeReferenceNumber));
NUnit.Framework.Assert.AreEqual(numberOfReferences - 1, table.GetCountOfIndirectObjects());
NUnit.Framework.Assert.IsTrue(table.Get(freeReferenceNumber).IsFree());
}
public virtual void FreeRefReuseWhenAddNewObjTest()
{
String filename = destinationFolder + "freeRefReuseWhenAddNewObj.pdf";
PdfDocument pdfDoc1 = new PdfDocument(new PdfReader(sourceFolder + "pdfWithRemovedObjInOldVer.pdf"), new PdfWriter
(filename).SetCompressionLevel(CompressionConstants.NO_COMPRESSION), new StampingProperties().UseAppendMode
());
pdfDoc1.GetCatalog().GetPdfObject().Put(new PdfName("CustomKey"), new PdfArray().MakeIndirect(pdfDoc1));
PdfObject newObj = pdfDoc1.GetCatalog().GetPdfObject();
newObj.SetModified();
int expectObjNumber = pdfDoc1.GetCatalog().GetPdfObject().Get(new PdfName("CustomKey")).GetIndirectReference
().GetObjNumber();
int expectGenNumber = pdfDoc1.GetCatalog().GetPdfObject().Get(new PdfName("CustomKey")).GetIndirectReference
().GetGenNumber();
PdfXrefTable xref = pdfDoc1.GetXref();
NUnit.Framework.Assert.AreEqual(8, expectObjNumber);
NUnit.Framework.Assert.AreEqual(0, expectGenNumber);
NUnit.Framework.Assert.IsTrue(xref.Get(5).IsFree());
pdfDoc1.Close();
}
/// <summary>Flushes all modified objects which have not been flushed yet.</summary>
/// <remarks>Flushes all modified objects which have not been flushed yet. Used in case incremental updates.</remarks>
protected internal virtual void FlushModifiedWaitingObjects()
{
PdfXrefTable xref = document.GetXref();
for (int i = 1; i < xref.Size(); i++)
{
PdfIndirectReference indirectReference = xref.Get(i);
if (null != indirectReference)
{
PdfObject obj = indirectReference.GetRefersTo(false);
if (obj != null && !obj.Equals(objectStream) && obj.IsModified())
{
obj.Flush();
}
}
}
if (objectStream != null && objectStream.GetSize() > 0)
{
objectStream.Flush();
objectStream = null;
}
}
