Package org.apache.pdfbox.preflight.content

Class PreflightContentStream

java.lang.Object

org.apache.pdfbox.contentstream.PDFStreamEngine

org.apache.pdfbox.preflight.content.PreflightStreamEngine

org.apache.pdfbox.preflight.content.PreflightContentStream

public class PreflightContentStream
extends PreflightStreamEngine

Field Summary

Fields inherited from class org.apache.pdfbox.preflight.content.PreflightStreamEngine

context, cosDocument, processedPage

Constructor Summary

Constructors

Constructor	Description
PreflightContentStream(PreflightContext _context, PDPage _page)

Method Summary

Modifier and Type	Method	Description
protected void	checkShowTextOperators(Operator operator, List<?> arguments)	Process Text Validation.
protected void	processOperator(Operator operator, List<COSBase> operands)	This is used to handle an operation.
protected void	unsupportedOperator(Operator operator, List<COSBase> arguments)	Called when an unsupported operator is encountered.
void	validatePageContentStream()	Process the validation of a PageContent (The page is initialized by the constructor)
void	validatePatternContentStream(PDTilingPattern pattern)	Process the validation of a Tiling Pattern
private void	validateStringArray(Operator operator, List<?> arguments)	Process Text Validation for the Operands of a TJ operator.
private void	validateStringDefinition(Operator operator, List<?> arguments)	Process Text Validation for the Operands of a Tj, "'" and "\"" operator.
void	validateText(byte[] string)	Process the validation of a Text operand contains in a ContentStream This validation checks that : The font isn't missing if the Rendering Mode isn't 3 The font metrics are consistent All character used in the text are defined in the font program.
void	validateXObjContentStream(PDFormXObject form)	Process the validation of a XObject Form

Methods inherited from class org.apache.pdfbox.preflight.content.PreflightStreamEngine

checkColorOperators, checkSetColorSpaceOperators, registerError, registerError, registerError, registerError, validateDefaultColorSpace, validateInlineImageColorSpace, validateInlineImageFilter, validateNumberOfGraphicStates, validateRenderingIntent

Methods inherited from class org.apache.pdfbox.contentstream.PDFStreamEngine

addOperator, applyTextAdjustment, beginMarkedContentSequence, beginText, decreaseLevel, endMarkedContentSequence, endText, getAppearance, getCurrentPage, getGraphicsStackSize, getGraphicsState, getInitialMatrix, getLevel, getResources, getTextLineMatrix, getTextMatrix, increaseLevel, operatorException, processAnnotation, processChildStream, processOperator, processPage, processSoftMask, processTilingPattern, processTilingPattern, processTransparencyGroup, processType3Stream, registerOperatorProcessor, restoreGraphicsStack, restoreGraphicsState, saveGraphicsStack, saveGraphicsState, setLineDashPattern, setTextLineMatrix, setTextMatrix, showAnnotation, showFontGlyph, showFontGlyph, showForm, showGlyph, showGlyph, showText, showTextString, showTextStrings, showTransparencyGroup, showType3Glyph, showType3Glyph, transformedPoint, transformWidth

Methods inherited from class java.lang.Object

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

Constructor Details

PreflightContentStream

public PreflightContentStream(PreflightContext _context,
 PDPage _page)

Method Details

validatePageContentStream

public void validatePageContentStream()
                               throws ValidationException

Process the validation of a PageContent (The page is initialized by the constructor)

Throws:

ValidationException

validateXObjContentStream

public void validateXObjContentStream(PDFormXObject form)
                               throws ValidationException

Process the validation of a XObject Form

Parameters:

form - the PDFormXObject to be validated.

Throws:

ValidationException

validatePatternContentStream

public void validatePatternContentStream(PDTilingPattern pattern)
                                  throws ValidationException

Process the validation of a Tiling Pattern

Parameters:

pattern - the PDTilingPattern to be validated.

Throws:

ValidationException

processOperator

protected void processOperator(Operator operator,
 List<COSBase> operands)
                        throws IOException

Description copied from class: PDFStreamEngine

This is used to handle an operation.

Overrides:

processOperator in class PDFStreamEngine

Parameters:

operator - The operation to perform.

operands - The list of arguments.

Throws:

IOException - If there is an error processing the operation.

unsupportedOperator

protected void unsupportedOperator(Operator operator,
 List<COSBase> arguments)

Description copied from class: PDFStreamEngine

Called when an unsupported operator is encountered.

Overrides:

unsupportedOperator in class PDFStreamEngine

Parameters:

operator - The unknown operator.

arguments - The list of operands.

checkShowTextOperators

protected void checkShowTextOperators(Operator operator,
 List<?> arguments)
                               throws IOException

Process Text Validation. Depending on the operator parameter, this will either call validateStringDefinition or validateStringArray.

Parameters:

operator -

arguments -

Throws:

IOException

validateStringDefinition

private void validateStringDefinition(Operator operator,
 List<?> arguments)
                               throws IOException

Process Text Validation for the Operands of a Tj, "'" and "\"" operator. If the validation fails for an unexpected reason, a IOException is thrown. If the validation fails due to validation error, a ContentStreamException is thrown. (Use the ValidationError attribute to know the cause)

Parameters:

operator -

arguments -

Throws:

IOException

validateStringArray

private void validateStringArray(Operator operator,
 List<?> arguments)
                          throws IOException

Process Text Validation for the Operands of a TJ operator. If the validation fails for an unexpected reason, a IOException is thrown. If the validation fails due to validation error, a ContentStreamException is thrown. (Use the ValidationError attribute to know the cause)

Parameters:

operator -

arguments -

Throws:

IOException

validateText

public void validateText(byte[] string)
                  throws IOException

Process the validation of a Text operand contains in a ContentStream This validation checks that :

• The font isn't missing if the Rendering Mode isn't 3
• The font metrics are consistent
• All character used in the text are defined in the font program.

Parameters:

string -

Throws:

IOException