Package org.apache.pdfbox.preflight.xobject

Class AbstractXObjValidator

java.lang.Object

org.apache.pdfbox.preflight.xobject.AbstractXObjValidator

All Implemented Interfaces:

XObjectValidator

Direct Known Subclasses:

XObjFormValidator, XObjImageValidator, XObjPostscriptValidator

public abstract class AbstractXObjValidator
extends java.lang.Object
implements XObjectValidator

This class processes commons validations of XObjects.

Field Summary

Fields

Modifier and Type	Field	Description
protected PreflightContext	context	The validation context which contains useful information to process validation.
protected COSStream	xobject	The XObject to validate as a COSStream.

Constructor Summary

Constructors

Constructor	Description
AbstractXObjValidator(PreflightContext context, COSStream xobj)

Method Summary

Modifier and Type	Method	Description
protected abstract void	checkMandatoryFields()	This method checks if required fields are present.
protected void	checkOPI()	According the ISO 190005:1-2005 specification, a XObject can't have an OPI entry in its dictionary.
protected void	checkPostscriptXObject()	According the ISO 190005:1-2005 specification, PostScript XObjects are forbidden.
protected void	checkReferenceXObject()	According the ISO 190005:1-2005 specification, a XObject can't have an Ref entry in its dictionary.
protected void	checkSMask()	This method checks the SMask entry in the XObject dictionary.
void	validate()	Process the validation of the XObject.

Methods inherited from class java.lang.Object

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

Field Detail

xobject

protected COSStream xobject

The XObject to validate as a COSStream.

context

protected PreflightContext context

The validation context which contains useful information to process validation.

Constructor Detail

AbstractXObjValidator

public AbstractXObjValidator(PreflightContext context,
                             COSStream xobj)

Method Detail

checkSMask

protected void checkSMask()

This method checks the SMask entry in the XObject dictionary. According to the PDF Reference, a SMask in a XObject is a Stream. So if it is not null, it should be an error but a SMask with the name None is authorized in the PDF/A Specification 6.4. If the validation fails (SMask not null and different from None), the error list is updated with the error code ERROR_GRAPHIC_TRANSPARENCY_SMASK (2.2.2).

checkOPI

protected void checkOPI()

According the ISO 190005:1-2005 specification, a XObject can't have an OPI entry in its dictionary. If the XObject has a OPI entry, the error list is updated with the error code ERROR_GRAPHIC_UNEXPECTED_KEY (2.3).

checkReferenceXObject

protected void checkReferenceXObject()

According the ISO 190005:1-2005 specification, a XObject can't have an Ref entry in its dictionary. If the XObject has a Ref entry, the error list is updated with the error code ERROR_GRAPHIC_UNEXPECTED_KEY (2.3).

checkPostscriptXObject

protected void checkPostscriptXObject()

According the ISO 190005:1-2005 specification, PostScript XObjects are forbidden. If the XObject is a PostScript XObject, the error list is updated with the error code ERROR_GRAPHIC_UNEXPECTED_VALUE_FOR_KEY (2.3.2). To know whether the object is a Postscript XObject, "Subtype" and "Subtype2" entries are checked.

checkMandatoryFields

protected abstract void checkMandatoryFields()

This method checks if required fields are present.

validate

public void validate()
              throws ValidationException

Description copied from interface: XObjectValidator

Process the validation of the XObject.

Specified by:

validate in interface XObjectValidator

Throws:

ValidationException