/// <summary>
/// Returns description of the next chunk.
/// </summary>
/// <returns>Chunk descriptor if there is a next chunk, else null.</returns>
public ManagedChunk GetChunk()
{
// No GetValue() call pending from this point on.
_pendingGetValue = false;
//
// Move to the next core property that exists and has a value
// and create a chunk descriptor out of it.
//
if (!CorePropertyEnumerator.MoveNext())
{
// End of chunks.
return(null);
}
ManagedChunk chunk = new PropertyChunk(
AllocateChunkID(),
CorePropertyEnumerator.CurrentGuid,
CorePropertyEnumerator.CurrentPropId
);
// GetValue() call pending from this point on
// for the current GetChunk call.
_pendingGetValue = true;
return(chunk);
}
/// <summary>
/// Initialzes the session for this filter.
/// </summary>
/// <param name="grfFlags">usage flags</param>
/// <param name="aAttributes">array of Managed FULLPROPSPEC structs to restrict responses</param>
/// <returns>IFILTER_FLAGS_NONE. Return value is effectively ignored by the caller.</returns>
public IFILTER_FLAGS Init(IFILTER_INIT grfFlags, ManagedFullPropSpec[] aAttributes)
{
// NOTE: Methods parameters have already been validated by XpsFilter.
_grfFlags = grfFlags;
_aAttributes = aAttributes;
// Each call to Init() creates a new enumerator
// with parameters corresponding to current Init() call.
_corePropertyEnumerator = new CorePropertyEnumerator(
_coreProperties, _grfFlags, _aAttributes);
return(IFILTER_FLAGS.IFILTER_FLAGS_NONE);
}
/// <summary>
/// Initialzes the session for this filter.
/// </summary>
/// <param name="grfFlags">usage flags</param>
/// <param name="aAttributes">array of Managed FULLPROPSPEC structs to restrict responses</param>
/// <returns>IFILTER_FLAGS_NONE. Return value is effectively ignored by the caller.</returns>
public IFILTER_FLAGS Init(IFILTER_INIT grfFlags, ManagedFullPropSpec[] aAttributes)
{
// NOTE: Methods parameters have already been validated by XpsFilter.
_grfFlags = grfFlags;
_aAttributes = aAttributes;
// Each call to Init() creates a new enumerator
// with parameters corresponding to current Init() call.
_corePropertyEnumerator = new CorePropertyEnumerator(
_coreProperties, _grfFlags, _aAttributes);
return IFILTER_FLAGS.IFILTER_FLAGS_NONE;
}
