Class PdfA4Checker

java.lang.Object
com.itextpdf.pdfa.checker.PdfAChecker
com.itextpdf.pdfa.checker.PdfA1Checker
com.itextpdf.pdfa.checker.PdfA2Checker
com.itextpdf.pdfa.checker.PdfA3Checker
com.itextpdf.pdfa.checker.PdfA4Checker
All Implemented Interfaces:
IValidationChecker
public class PdfA4Checker extends PdfA3Checker
PdfA4Checker defines the requirements of the PDF/A-4 standard and contains a number of methods that override the implementations of its superclass PdfA3Checker.

The specification implemented by this class is ISO 19005-4

  • Field Details

    • CALRGB_COLOR_SPACE

      private static final String CALRGB_COLOR_SPACE
      See Also:

    • forbiddenAnnotations4

      private static final Set<PdfName> forbiddenAnnotations4

    • forbiddenAnnotations4E

      private static final Set<PdfName> forbiddenAnnotations4E

    • forbiddenAnnotations4F

      private static final Set<PdfName> forbiddenAnnotations4F

    • apLessAnnotations

      private static final Set<PdfName> apLessAnnotations

    • allowedBlendModes4

      private static final Set<PdfName> allowedBlendModes4

    • TRANSPARENCY_ERROR_MESSAGE

      private static final String TRANSPARENCY_ERROR_MESSAGE
      See Also:

    • LOGGER

      private static final org.slf4j.Logger LOGGER

    • forbiddenActionsE

      private static final Set<PdfName> forbiddenActionsE

    • allowedEntriesInAAWhenNonWidget

      private static final Set<PdfName> allowedEntriesInAAWhenNonWidget

    • iccBasedCmykObjects

      private Map<PdfObject, List<PdfStream>> iccBasedCmykObjects

  • Constructor Details

    • PdfA4Checker

      public PdfA4Checker(PdfAConformance aConformance)
      Creates a PdfA4Checker with the required conformance
      Parameters:
      aConformance - the required conformance

  • Method Details

    • checkColorSpace

      public void checkColorSpace(PdfColorSpace colorSpace, PdfObject pdfObject, PdfDictionary currentColorSpaces, boolean checkAlternate, Boolean fill)
      This method performs a range of checks on the given color space, depending on the type and properties of that color space.
      Overrides:
      checkColorSpace in class PdfA2Checker
      Parameters:
      colorSpace - the color space to check
      pdfObject - the pdf object to check color space in
      currentColorSpaces - a PdfDictionary containing the color spaces used in the document
      checkAlternate - whether or not to also check the parent color space
      fill - whether the color space is used for fill or stroke operations

    • checkPageColorsUsages

      protected void checkPageColorsUsages(PdfDictionary pageDict, PdfDictionary pageResources)
      Verify the conformity of used color spaces on the page.
      Overrides:
      checkPageColorsUsages in class PdfA2Checker
      Parameters:
      pageDict - the PdfDictionary contains contents for colors to be checked
      pageResources - the PdfDictionary contains resources for colors to be checked

    • checkTrailer

      protected void checkTrailer(PdfDictionary trailer)
      Verify the conformity of the trailer dictionary.
      Overrides:
      checkTrailer in class PdfA1Checker
      Parameters:
      trailer - the PdfDictionary of trailer to check

    • checkCatalog

      protected void checkCatalog(PdfCatalog catalog)
      Verify the conformity of the pdf catalog.
      Overrides:
      checkCatalog in class PdfA1Checker
      Parameters:
      catalog - the PdfCatalog of trailer to check

    • checkPageObject

      protected void checkPageObject(PdfDictionary pageDict, PdfDictionary pageResources)
      Verify the conformity of the page dictionary.
      Overrides:
      checkPageObject in class PdfA2Checker
      Parameters:
      pageDict - the PdfDictionary to check
      pageResources - the page's resources dictionary

    • checkCatalogValidEntries

      protected void checkCatalogValidEntries(PdfDictionary catalogDict)
      Checks if entries in catalog dictionary are valid.
      Overrides:
      checkCatalogValidEntries in class PdfA2Checker
      Parameters:
      catalogDict - the catalog PdfDictionary to be checked

    • checkFileSpec

      protected void checkFileSpec(PdfDictionary fileSpec)
      Verify the conformity of the file specification dictionary.
      Overrides:
      checkFileSpec in class PdfA3Checker
      Parameters:
      fileSpec - the PdfDictionary containing file specification to be checked

    • checkPageTransparency

      protected void checkPageTransparency(PdfDictionary pageDict, PdfDictionary pageResources)
      Verify the conformity of the page transparency.
      Overrides:
      checkPageTransparency in class PdfA2Checker
      Parameters:
      pageDict - the PdfDictionary contains contents for transparency to be checked
      pageResources - the PdfDictionary contains resources for transparency to be checked

    • checkCatalogAAConformance

      protected void checkCatalogAAConformance(PdfDictionary dict)
      Check the conformity of the AA dictionary on catalog level.
      Overrides:
      checkCatalogAAConformance in class PdfA2Checker
      Parameters:
      dict - the catalog dictionary

    • checkPageAAConformance

      protected void checkPageAAConformance(PdfDictionary dict)
      Check the conformity of the AA dictionary on catalog level.
      Overrides:
      checkPageAAConformance in class PdfA2Checker
      Parameters:
      dict - the catalog dictionary

    • checkPdfNumber

      protected void checkPdfNumber(PdfNumber number)
      Verify the conformity of the PDF number.
      Overrides:
      checkPdfNumber in class PdfA1Checker
      Parameters:
      number - the PdfNumber to check

    • checkCanvasStack

      public void checkCanvasStack(char stackOperation)
      This method checks compliance with the graphics state architectural limitation, explained by PdfAChecker.maxGsStackDepth.
      Overrides:
      checkCanvasStack in class PdfA1Checker
      Parameters:
      stackOperation - the operation to check the graphics state counter for

    • checkSignatureType

      public void checkSignatureType(boolean isCAdES)
      This method checks compliance of the signature type.
      Overrides:
      checkSignatureType in class PdfA1Checker
      Parameters:
      isCAdES - true if CAdES signature type is used, false otherwise

    • getMaxStringLength

      protected int getMaxStringLength()
      Returns maximum allowed bytes length of the string in a PDF document.
      Overrides:
      getMaxStringLength in class PdfA2Checker
      Returns:
      maximum string length

    • checkNumberOfDeviceNComponents

      protected void checkNumberOfDeviceNComponents(PdfSpecialCs.DeviceN deviceN)
      Checks the number of components in DeviceN color space.
      Overrides:
      checkNumberOfDeviceNComponents in class PdfA2Checker
      Parameters:
      deviceN - the color space to check

    • checkExtGState

      public void checkExtGState(CanvasGraphicsState extGState, PdfStream contentStream)
      Description copied from class: PdfAChecker
      Performs a number of checks on the graphics state, among others ISO 19005-1 section 6.2.8 and 6.4 and ISO 19005-2 section 6.2.5 and 6.2.10. This method will be abstract in the update 7.2
      Overrides:
      checkExtGState in class PdfA2Checker
      Parameters:
      extGState - the graphics state to be checked
      contentStream - current content stream

    • checkFormXObject

      protected void checkFormXObject(PdfStream form, PdfStream contentStream)
      Verify the conformity of the Form XObject with appropriate specification. Throws PdfAConformanceException if any discrepancy was found
      Overrides:
      checkFormXObject in class PdfA2Checker
      Parameters:
      form - the PdfStream to be checked
      contentStream - the PdfStream current content stream

    • checkAnnotation

      protected void checkAnnotation(PdfDictionary annotDic)
      Verify the conformity of the annotation dictionary.
      Overrides:
      checkAnnotation in class PdfA2Checker
      Parameters:
      annotDic - the annotation PdfDictionary to be checked

    • getForbiddenAnnotations

      protected Set<PdfName> getForbiddenAnnotations()
      Gets forbidden annotation types.
      Overrides:
      getForbiddenAnnotations in class PdfA2Checker
      Returns:
      a set of forbidden annotation types

    • getAppearanceLessAnnotations

      protected Set<PdfName> getAppearanceLessAnnotations()
      Gets annotation types which are allowed not to have appearance stream.
      Overrides:
      getAppearanceLessAnnotations in class PdfA2Checker
      Returns:
      set of annotation names.

    • checkWidgetAAConformance

      protected void checkWidgetAAConformance(PdfDictionary dict)
      Check the conformity of the AA dictionary on widget level.
      Parameters:
      dict - the widget dictionary

    • checkMetaData

      protected void checkMetaData(PdfDictionary catalog)
      Description copied from class: PdfAChecker
      Performs a number of checks on the metadata of the document.
      Overrides:
      checkMetaData in class PdfA1Checker
      Parameters:
      catalog - the catalog PdfDictionary to check

    • checkOutputIntents

      protected void checkOutputIntents(PdfDictionary catalog)
      Verify the conformity of the output intents array in the catalog dictionary.
      Overrides:
      checkOutputIntents in class PdfA2Checker
      Parameters:
      catalog - the PdfDictionary of a catalog or page to check

    • checkAnnotationAgainstActions

      protected void checkAnnotationAgainstActions(PdfDictionary annotDic)
      Checked annotation against actions, exception will be thrown if either A or AA actions aren't allowed for specific type of annotation.
      Overrides:
      checkAnnotationAgainstActions in class PdfA2Checker
      Parameters:
      annotDic - an annotation PDF dictionary

    • hasAAIllegalEntries

      private static boolean hasAAIllegalEntries(PdfDictionary aa)

    • getForbiddenActions

      protected Set<PdfName> getForbiddenActions()
      Retrieve forbidden actions in conforming document.
      Overrides:
      getForbiddenActions in class PdfA2Checker
      Returns:
      set of PdfName with forbidden actions

    • checkContentConfigurationDictAgainstAsKey

      protected void checkContentConfigurationDictAgainstAsKey(PdfDictionary config)
      Check optional content configuration dictionary against AS key.
      Overrides:
      checkContentConfigurationDictAgainstAsKey in class PdfA2Checker
      Parameters:
      config - a content configuration dictionary

    • getTransparencyErrorMessage

      protected String getTransparencyErrorMessage()
      Retrieve transparency error message valid for the pdf/a standard being used.
      Overrides:
      getTransparencyErrorMessage in class PdfA2Checker
      Returns:
      error message.

    • checkBlendMode

      protected void checkBlendMode(PdfName blendMode)
      Check if blendMode is compatible with pdf/a standard being used.
      Overrides:
      checkBlendMode in class PdfA2Checker
      Parameters:
      blendMode - blend mode name to check.

    • getMaxNameLength

      protected int getMaxNameLength()
      Retrieve maximum allowed length of the name object.
      Overrides:
      getMaxNameLength in class PdfA1Checker
      Returns:
      maximum allowed length of the name

    • isValidEncoding

      private static void isValidEncoding(byte[] data)

    • isValidXmpConformance

      private static boolean isValidXmpConformance(String value)
      A PDF/A-4e conforming file shall specify the value of pdfa:conformance as E. A PDF/A-4f conforming file shall specify the value of pdfa:conformance as F. A file that does not conform to either PDF/A-4e or PDF/A-4f shall not provide any pdfa:conformance.
      Parameters:
      value - pdfa:conformance value to check
      Returns:
      true if pdfa:conformance value is valid, false otherwise

    • checkPacketHeader

      private void checkPacketHeader(byte[] meta)

    • checkFileProvenanceSpec

      private void checkFileProvenanceSpec(XMPMeta meta)

    • isCMYKColorant

      private boolean isCMYKColorant(PdfName colourant)

    • checkPageContentsForColorUsages

      private void checkPageContentsForColorUsages(PdfDictionary pageDict, PdfStream pageIntentProfile, PdfColorSpace pageTransparencyBlendingCS)

    • checkAnnotationsForColorUsages

      private void checkAnnotationsForColorUsages(PdfArray annotations, PdfStream pageIntentProfile, PdfColorSpace pageTransparencyBlendingCS)

    • checkAppearanceStreamForColorUsages

      private void checkAppearanceStreamForColorUsages(PdfDictionary ap, PdfStream pageIntentProfile, PdfColorSpace pageTransparencyBlendingCS)

    • checkObjectWithResourcesForColorUsages

      private void checkObjectWithResourcesForColorUsages(PdfObject objectWithResources, PdfStream pageIntentProfile, PdfColorSpace pageTransparencyBlendingCS)

    • checkResourcesForColorUsages

      private void checkResourcesForColorUsages(PdfDictionary resources, PdfStream pageIntentProfile, PdfColorSpace pageTransparencyBlendingCS)

    • checkSingleResourceTypeForColorUsages

      private void checkSingleResourceTypeForColorUsages(PdfDictionary singleResourceDict, PdfStream pageIntentProfile, PdfColorSpace pageTransparencyBlendingCS)

    • checkContentForColorUsages

      private void checkContentForColorUsages(PdfObject pdfObject, PdfStream pageIntentProfile, PdfColorSpace pageTransparencyBlendingCS)

    • throwIfIdenticalProfiles

      private static void throwIfIdenticalProfiles(PdfStream iccBasedProfile1, PdfStream iccBasedProfile2)

    • getColorspaceTypeIfIccBasedOrCalRgb

      private static String getColorspaceTypeIfIccBasedOrCalRgb(PdfColorSpace colorspace)

    • getDeviceIndependentTransparencyBlendingCSIfRbgOrCmykBased

      private static PdfColorSpace getDeviceIndependentTransparencyBlendingCSIfRbgOrCmykBased(PdfDictionary pageDict)