com.etymon.pjx.util
Class PdfReferencedObjects

java.lang.Object
  com.etymon.pjx.util.PdfReferencedObjects

All Implemented Interfaces:

PdfObjectFilter

Direct Known Subclasses:

PdfPageObjects

public class PdfReferencedObjects
extends java.lang.Object
implements PdfObjectFilter

Examines a specified object and returns the set of all objects it references. This class implements the PdfObjectFilter interface. The preFilter(PdfObject) method can be overridden in a subclass to pre-process the object and its contents. This class is synchronized.

Field Summary

protected PdfManager	_m The manager to use for resolving references.
protected java.util.Set	_ref The current set of referenced objects (stored as indirect references).
protected java.util.Set	_ref_master The total set of referenced objects (stored as indirect references).

Constructor Summary

PdfReferencedObjects(PdfManager manager)
Constructs a PdfReferencedObjects instance.

Method Summary

java.util.Set	getReferenced(PdfObject obj) Returns the set of all objects referenced by the specified PDF object.
PdfObject	postFilter(PdfObject obj) This method is used by getReferenced(PdfObject) and should not be called externally.
PdfObject	preFilter(PdfObject obj) This method is used by getReferenced(PdfObject) and should not be called externally; however, it may be overridden in subclasses in order to pre-process the objects.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_ref_master

protected java.util.Set _ref_master

The total set of referenced objects (stored as indirect references).

_ref

protected java.util.Set _ref

The current set of referenced objects (stored as indirect references).

_m

protected PdfManager _m

The manager to use for resolving references.

Constructor Detail

PdfReferencedObjects

public PdfReferencedObjects(PdfManager manager)

Constructs a PdfReferencedObjects instance.

Parameters:

manager - the manager associated with the document.

Method Detail

getReferenced

public java.util.Set getReferenced(PdfObject obj)
                            throws java.io.IOException,
                                   PdfFormatException

Returns the set of all objects referenced by the specified PDF object. This method calls PdfObject.filter(PdfObjectFilter) to process objects recursively.

Parameters:

obj - the object to examine.

Throws:

PdfFormatException

java.io.IOException

preFilter

public PdfObject preFilter(PdfObject obj)
                    throws PdfFormatException

This method is used by getReferenced(PdfObject) and should not be called externally; however, it may be overridden in subclasses in order to pre-process the objects. (It is not synchronized.)

Specified by:

preFilter in interface PdfObjectFilter

Parameters:

obj - the object to filter.

Returns:

the filtered object.

Throws:

PdfFormatException

postFilter

public PdfObject postFilter(PdfObject obj)
                     throws PdfFormatException

This method is used by getReferenced(PdfObject) and should not be called externally. (It is not synchronized.)

Specified by:

postFilter in interface PdfObjectFilter

Parameters:

obj - the object to filter.

Returns:

the filtered object.

Throws:

PdfFormatException