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## com.lowagie.text.pdf
Class PdfReader

    java.lang.Object
      com.lowagie.text.pdf.PdfReader

All Implemented Interfaces:
  PdfViewerPreferences

Direct Known Subclasses:
  FdfReader

    public class PdfReader

extends Object
implements PdfViewerPreferences

Reads a PDF document.

Author:
  Paulo Soares (psoares@consiste.pt), Kazuya Ujihara

Nested Class Summary
`(package private) static class` | `PdfReader.PageRefs`

Field Summary
`protected PRAcroForm` | `acroForm`
`protected boolean` | `acroFormParsed`
`private boolean` | `appendable` Holds value of property appendable.
`protected PdfDictionary` | `catalog`
`protected Certificate` | `certificate`
`protected Key` | `certificateKey`
`protected String` | `certificateKeyProvider`
`protected boolean` | `consolidateNamedDestinations`
`private PRIndirectReference` | `cryptoRef`
`protected PdfEncryption` | `decrypt`
`protected boolean` | `encrypted`
`private boolean` | `encryptionError`
`(package private) static byte[]` | `endobj`
`(package private) static byte[]` | `endstream`
`protected int` | `eofPos`
`private int` | `fileLength`
`protected int` | `freeXref`
`private boolean` | `hybridXref`
`protected int` | `lastXref`
`private int` | `lastXrefPartial`
`protected boolean` | `newXrefType`
`private int` | `objGen`
`private int` | `objNum`
`protected HashMap` | `objStmMark`
`protected IntHashtable` | `objStmToOffset`
`private boolean` | `ownerPasswordUsed`
`(package private) static PdfName[]` | `pageInhCandidates`
`protected PdfReader.PageRefs` | `pageRefs`
`private boolean` | `partial`
`protected byte[]` | `password`
`protected char` | `pdfVersion`
`protected int` | `pValue`
`private int` | `readDepth`
`protected boolean` | `rebuilt`
`protected boolean` | `remoteToLocalNamedDestinations`
`(package private) PdfDictionary` | `rootPages`
`protected int` | `rValue`
`protected boolean` | `sharedStreams`
`protected ArrayList` | `strings`
`protected boolean` | `tampered`
`protected PRTokeniser` | `tokens`
`protected PdfDictionary` | `trailer`
`private PdfViewerPreferencesImp` | `viewerPreferences`
`protected int[]` | `xref`
`private ArrayList` | `xrefObj`

Constructor Summary
`protected` | `PdfReader()`
`` | `PdfReader(byte[] pdfIn)` Reads and parses a PDF document.
`` | `PdfReader(byte[] pdfIn, byte[] ownerPassword)` Reads and parses a PDF document.
`` | `PdfReader(InputStream is)` Reads and parses a PDF document.
`` | `PdfReader(InputStream is, byte[] ownerPassword)` Reads and parses a PDF document.
`` | `PdfReader(PdfReader reader)` Creates an independent duplicate.
`` | `PdfReader(RandomAccessFileOrArray raf, byte[] ownerPassword)` Reads and parses a pdf document.
`` | `PdfReader(String filename)` Reads and parses a PDF document.
`` | `PdfReader(String filename, byte[] ownerPassword)` Reads and parses a PDF document.
`` | `PdfReader(String filename, Certificate certificate, Key certificateKey, String certificateKeyProvider)` Reads and parses a PDF document.
`` | `PdfReader(URL url)` Reads and parses a PDF document.
`` | `PdfReader(URL url, byte[] ownerPassword)` Reads and parses a PDF document.

Method Summary
`PRIndirectReference` | `addPdfObject(PdfObject obj)`
`void` | `addViewerPreference(PdfName key, PdfObject value)` Adds a viewer preference
`static byte[]` | `ASCII85Decode(byte[] in)` Decodes a stream that has the ASCII85Decode filter.
`static byte[]` | `ASCIIHexDecode(byte[] in)` Decodes a stream that has the ASCIIHexDecode filter.
`private void` | `checkPRStreamLength(PRStream stream)`
`void` | `close()` Closes the reader
`byte[]` | `computeUserPassword()`
`void` | `consolidateNamedDestinations()` Replaces all the local named links with the actual destinations.
`private boolean` | `convertNamedDestination(PdfObject obj, HashMap names)` Converts a remote named destination GoToR with a local named destination if there's a corresponding name.
`int` | `createFakeFontSubsets()` Finds all the fonts not subset but embedded and marks them as subset.
`static byte[]` | `decodePredictor(byte[] in, PdfObject dicPar)`
`double` | `dumpPerc()`
`protected static PdfDictionary` | `duplicatePdfDictionary(PdfDictionary original, PdfDictionary copy, PdfReader newReader)`
`protected static PdfObject` | `duplicatePdfObject(PdfObject original, PdfReader newReader)`
`void` | `eliminateSharedStreams()` Eliminates shared streams if they exist.
`private void` | `ensureXrefSize(int size)`
`private boolean` | `equalsArray(byte[] ar1, byte[] ar2, int size)`
`(package private) static boolean` | `equalsn(byte[] a1, byte[] a2)`
`(package private) static boolean` | `existsName(PdfDictionary dic, PdfName key, PdfName value)`
`static byte[]` | `FlateDecode(byte[] in)` Decodes a stream that has the FlateDecode filter.
`static byte[]` | `FlateDecode(byte[] in, boolean strict)` A helper to FlateDecode.
`AcroFields` | `getAcroFields()` Gets a read-only version of `AcroFields`.
`PRAcroForm` | `getAcroForm()` Returns the document's acroform, if it has one.
`Rectangle` | `getBoxSize(int index, String boxName)` Gets the box size.
`PdfDictionary` | `getCatalog()` Returns the document's catalog.
`int` | `getCertificationLevel()` Gets the certification level for this document.
`Rectangle` | `getCropBox(int index)` Gets the crop box without taking rotation into account.
`int` | `getCryptoMode()`
`(package private) PdfIndirectReference` | `getCryptoRef()`
`(package private) PdfEncryption` | `getDecrypt()`
`int` | `getEofPos()` Gets the byte address of the %%EOF marker.
`int` | `getFileLength()` Getter for property fileLength.
`(package private) static String` | `getFontName(PdfDictionary dic)`
`HashMap` | `getInfo()` Returns the content of the document information dictionary as a `HashMap` of `String`.
`String` | `getJavaScript()` Gets the global document JavaScript.
`String` | `getJavaScript(RandomAccessFileOrArray file)` Gets the global document JavaScript.
`int` | `getLastXref()` Gets the byte address of the last xref table.
`ArrayList` | `getLinks(int page)`
`byte[]` | `getMetadata()` Gets the XML metadata.
`private static PdfArray` | `getNameArray(PdfObject obj)`
`HashMap` | `getNamedDestination()` Gets all the named destinations as an `HashMap`.
`HashMap` | `getNamedDestination(boolean keepNames)` Gets all the named destinations as an `HashMap`.
`HashMap` | `getNamedDestinationFromNames()` Gets the named destinations from the /Dests key in the catalog as an `HashMap`.
`HashMap` | `getNamedDestinationFromNames(boolean keepNames)` Gets the named destinations from the /Dests key in the catalog as an `HashMap`.
`HashMap` | `getNamedDestinationFromStrings()` Gets the named destinations from the /Names key in the catalog as an `HashMap`.
`static Rectangle` | `getNormalizedRectangle(PdfArray box)` Normalizes a `Rectangle` so that llx and lly are smaller than urx and ury.
`int` | `getNumberOfPages()` Gets the number of pages in the document.
`byte[]` | `getPageContent(int pageNum)` Gets the contents of the page.
`byte[]` | `getPageContent(int pageNum, RandomAccessFileOrArray file)` Gets the contents of the page.
`PdfDictionary` | `getPageN(int pageNum)` Gets the dictionary that represents a page.
`PdfDictionary` | `getPageNRelease(int pageNum)`
`PRIndirectReference` | `getPageOrigRef(int pageNum)` Gets the page reference to this page.
`int` | `getPageRotation(int index)` Gets the page rotation.
`(package private) int` | `getPageRotation(PdfDictionary page)`
`Rectangle` | `getPageSize(int index)` Gets the page size without taking rotation into account.
`Rectangle` | `getPageSize(PdfDictionary page)` Gets the page from a page dictionary
`Rectangle` | `getPageSizeWithRotation(int index)` Gets the page size, taking rotation into account.
`Rectangle` | `getPageSizeWithRotation(PdfDictionary page)` Gets the rotated page from a page dictionary.
`PdfObject` | `getPdfObject(int idx)`
`static PdfObject` | `getPdfObject(PdfObject obj)` Reads a `PdfObject` resolving an indirect reference if needed.
`static PdfObject` | `getPdfObject(PdfObject obj, PdfObject parent)`
`PdfObject` | `getPdfObjectRelease(int idx)`
`static PdfObject` | `getPdfObjectRelease(PdfObject obj)`
`static PdfObject` | `getPdfObjectRelease(PdfObject obj, PdfObject parent)` Reads a `PdfObject` resolving an indirect reference if needed.
`protected PdfReaderInstance` | `getPdfReaderInstance(PdfWriter writer)`
`char` | `getPdfVersion()` Gets the PDF version.
`int` | `getPermissions()` Gets the encryption permissions.
`RandomAccessFileOrArray` | `getSafeFile()` Gets a new file instance of the original PDF document.
`int` | `getSimpleViewerPreferences()` Returns a bitset representing the PageMode and PageLayout viewer preferences.
`static byte[]` | `getStreamBytes(PRStream stream)` Get the content from a stream applying the required filters.
`static byte[]` | `getStreamBytes(PRStream stream, RandomAccessFileOrArray file)` Get the content from a stream applying the required filters.
`static byte[]` | `getStreamBytesRaw(PRStream stream)` Get the content from a stream as it is without applying any filter.
`static byte[]` | `getStreamBytesRaw(PRStream stream, RandomAccessFileOrArray file)` Get the content from a stream as it is without applying any filter.
`(package private) static String` | `getSubsetPrefix(PdfDictionary dic)`
`PdfDictionary` | `getTrailer()` Gets the trailer dictionary
`int` | `getXrefSize()` Gets the number of xref objects.
`boolean` | `is128Key()` Returns `true` if the PDF has a 128 bit key encryption.
`boolean` | `isAppendable()` Getter for property appendable.
`boolean` | `isEncrypted()` Returns `true` if the PDF is encrypted.
`boolean` | `isHybridXref()` Getter for property hybridXref.
`boolean` | `isMetadataEncrypted()`
`boolean` | `isNewXrefType()` Getter for property newXrefType.
`boolean` | `isOpenedWithFullPermissions()` Checks if the document was opened with the owner password so that the end application can decide what level of access restrictions to apply.
`boolean` | `isRebuilt()` Checks if the document had errors and was rebuilt.
`boolean` | `isTampered()` Checks if the document was changed.
`private void` | `iterateBookmarks(PdfObject outlineRef, HashMap names)`
`static PdfObject` | `killIndirect(PdfObject obj)` Eliminates the reference to the object freeing the memory used by it and clearing the xref entry.
`protected void` | `killXref(PdfObject obj)`
`static byte[]` | `LZWDecode(byte[] in)` Decodes a stream that has the LZWDecode filter.
`void` | `makeRemoteNamedDestinationsLocal()` Replaces remote named links with local destinations that have the same name.
`protected PdfArray` | `readArray()`
`private void` | `readDecryptedDocObj()`
`protected PdfDictionary` | `readDictionary()`
`protected void` | `readDocObj()`
`protected void` | `readDocObjPartial()`
`protected void` | `readObjStm(PRStream stream, IntHashtable map)`
`protected PdfObject` | `readOneObjStm(PRStream stream, int idx)`
`protected void` | `readPages()`
`protected void` | `readPdf()`
`protected void` | `readPdfPartial()`
`protected PdfObject` | `readPRObject()`
`protected PdfObject` | `readSingleObject(int k)`
`protected void` | `readXref()`
`protected PdfDictionary` | `readXrefSection()`
`protected boolean` | `readXRefStream(int ptr)`
`protected void` | `rebuildXref()`
`void` | `releaseLastXrefPartial()`
`static void` | `releaseLastXrefPartial(PdfObject obj)`
`void` | `releasePage(int pageNum)`
`void` | `removeAnnotations()` Removes all the annotations and fields from the document.
`void` | `removeFields()` Removes all the fields from the document.
`protected void` | `removeUnusedNode(PdfObject obj, boolean[] hits)`
`int` | `removeUnusedObjects()` Removes all the unreachable objects.
`void` | `removeUsageRights()` Removes any usage rights that this PDF may have.
`private boolean` | `replaceNamedDestination(PdfObject obj, HashMap names)`
`void` | `resetLastXrefPartial()`
`void` | `resetReleasePage()`
`void` | `selectPages(List pagesToKeep)` Selects the pages to keep in the document.
`void` | `selectPages(String ranges)` Selects the pages to keep in the document.
`void` | `setAppendable(boolean appendable)` Setter for property appendable.
`void` | `setPageContent(int pageNum, byte[] content)` Sets the contents of the page.
`void` | `setPageContent(int pageNum, byte[] content, int compressionLevel)` Sets the contents of the page.
`void` | `setTampered(boolean tampered)` Sets the tampered state.
`void` | `setViewerPreferences(int preferences)` Sets the viewer preferences as the sum of several constants.
`(package private) void` | `setViewerPreferences(PdfViewerPreferencesImp vp)`
`private void` | `setXrefPartialObject(int idx, PdfObject obj)`
`int` | `shuffleSubsetNames()` Finds all the font subsets and changes the prefixes to some random values.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### pageInhCandidates

    static final PdfName[] pageInhCandidates

### endstream

    static final byte[] endstream

### endobj

    static final byte[] endobj

### tokens

    protected PRTokeniser tokens

### xref

    protected int[] xref

### objStmMark

    protected HashMap objStmMark

### objStmToOffset

    protected IntHashtable objStmToOffset

### newXrefType

    protected boolean newXrefType

### xrefObj

    private ArrayList xrefObj

### rootPages

    PdfDictionary rootPages

### trailer

    protected PdfDictionary trailer

### catalog

    protected PdfDictionary catalog

### pageRefs

    protected PdfReader.PageRefs pageRefs

### acroForm

    protected PRAcroForm acroForm

### acroFormParsed

    protected boolean acroFormParsed

### encrypted

    protected boolean encrypted

### rebuilt

    protected boolean rebuilt

### freeXref

    protected int freeXref

### tampered

    protected boolean tampered

### lastXref

    protected int lastXref

### eofPos

    protected int eofPos

### pdfVersion

    protected char pdfVersion

### decrypt

    protected PdfEncryption decrypt

### password

    protected byte[] password

### certificateKey

    protected Key certificateKey

### certificate

    protected Certificate certificate

### certificateKeyProvider

    protected String certificateKeyProvider

### ownerPasswordUsed

    private boolean ownerPasswordUsed

### strings

    protected ArrayList strings

### sharedStreams

    protected boolean sharedStreams

### consolidateNamedDestinations

    protected boolean consolidateNamedDestinations

### remoteToLocalNamedDestinations

    protected boolean remoteToLocalNamedDestinations

### rValue

    protected int rValue

### pValue

    protected int pValue

### objNum

    private int objNum

### objGen

    private int objGen

### fileLength

    private int fileLength

### hybridXref

    private boolean hybridXref

### lastXrefPartial

    private int lastXrefPartial

### partial

    private boolean partial

### cryptoRef

    private PRIndirectReference cryptoRef

### viewerPreferences

    private PdfViewerPreferencesImp viewerPreferences

### encryptionError

    private boolean encryptionError

### appendable

    private boolean appendable

  Holds value of property appendable.

### readDepth

    private int readDepth

Constructor Detail

### PdfReader

    protected PdfReader()

### PdfReader

    public PdfReader(String filename)
              throws IOException

  Reads and parses a PDF document.

  Parameters:
    `filename` - the file name of the document
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(String filename,
                     byte[] ownerPassword)
              throws IOException

  Reads and parses a PDF document.

  Parameters:
    `filename` - the file name of the document
    `ownerPassword` - the password to read the document
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(byte[] pdfIn)
              throws IOException

  Reads and parses a PDF document.

  Parameters:
    `pdfIn` - the byte array with the document
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(byte[] pdfIn,
                     byte[] ownerPassword)
              throws IOException

  Reads and parses a PDF document.

  Parameters:
    `pdfIn` - the byte array with the document
    `ownerPassword` - the password to read the document
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(String filename,
                     Certificate certificate,
                     Key certificateKey,
                     String certificateKeyProvider)
              throws IOException

  Reads and parses a PDF document.

  Parameters:
    `filename` - the file name of the document
    `certificate` - the certificate to read the document
    `certificateKey` - the private key of the certificate
    `certificateKeyProvider` - the security provider for certificateKey
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(URL url)
              throws IOException

  Reads and parses a PDF document.

  Parameters:
    `url` - the URL of the document
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(URL url,
                     byte[] ownerPassword)
              throws IOException

  Reads and parses a PDF document.

  Parameters:
    `url` - the URL of the document
    `ownerPassword` - the password to read the document
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(InputStream is,
                     byte[] ownerPassword)
              throws IOException

  Reads and parses a PDF document.

  Parameters:
    `is` - the `InputStream` containing the document. The stream is read to the end but is not closed
    `ownerPassword` - the password to read the document
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(InputStream is)
              throws IOException

  Reads and parses a PDF document.

  Parameters:
    `is` - the `InputStream` containing the document. The stream is read to the end but is not closed
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(RandomAccessFileOrArray raf,
                     byte[] ownerPassword)
              throws IOException

  Reads and parses a pdf document. Contrary to the other constructors only the xref is read into memory. The reader is said to be working in "partial" mode as only parts of the pdf are read as needed. The pdf is left open but may be closed at any time with `PdfReader.close()`, reopen is automatic.

  Parameters:
    `raf` - the document location
    `ownerPassword` - the password or `null` for no password
  Throws:
    `IOException` - on error

### PdfReader

    public PdfReader(PdfReader reader)

  Creates an independent duplicate.

  Parameters:
    `reader` - the `PdfReader` to duplicate

Method Detail

### getSafeFile

    public RandomAccessFileOrArray getSafeFile()

  Gets a new file instance of the original PDF document.

  Returns:
    a new file instance of the original PDF document

### getPdfReaderInstance

    protected PdfReaderInstance getPdfReaderInstance(PdfWriter writer)

### getNumberOfPages

    public int getNumberOfPages()

  Gets the number of pages in the document.

  Returns:
    the number of pages in the document

### getCatalog

    public PdfDictionary getCatalog()

  Returns the document's catalog. This dictionary is not a copy, any changes will be reflected in the catalog.

  Returns:
    the document's catalog

### getAcroForm

    public PRAcroForm getAcroForm()

  Returns the document's acroform, if it has one.

  Returns:
    the document's acroform

### getPageRotation

    public int getPageRotation(int index)

  Gets the page rotation. This value can be 0, 90, 180 or 270.

  Parameters:
    `index` - the page number. The first page is 1
  Returns:
    the page rotation

### getPageRotation

    int getPageRotation(PdfDictionary page)

### getPageSizeWithRotation

    public Rectangle getPageSizeWithRotation(int index)

  Gets the page size, taking rotation into account. This is a `Rectangle` with the value of the /MediaBox and the /Rotate key.

  Parameters:
    `index` - the page number. The first page is 1
  Returns:
    a `Rectangle`

### getPageSizeWithRotation

    public Rectangle getPageSizeWithRotation(PdfDictionary page)

  Gets the rotated page from a page dictionary.

  Parameters:
    `page` - the page dictionary
  Returns:
    the rotated page

### getPageSize

    public Rectangle getPageSize(int index)

  Gets the page size without taking rotation into account. This is the value of the /MediaBox key.

  Parameters:
    `index` - the page number. The first page is 1
  Returns:
    the page size

### getPageSize

    public Rectangle getPageSize(PdfDictionary page)

  Gets the page from a page dictionary

  Parameters:
    `page` - the page dictionary
  Returns:
    the page

### getCropBox

    public Rectangle getCropBox(int index)

  Gets the crop box without taking rotation into account. This is the value of the /CropBox key. The crop box is the part of the document to be displayed or printed. It usually is the same as the media box but may be smaller. If the page doesn't have a crop box the page size will be returned.

  Parameters:
    `index` - the page number. The first page is 1
  Returns:
    the crop box

### getBoxSize

    public Rectangle getBoxSize(int index,
                                String boxName)

  Gets the box size. Allowed names are: "crop", "trim", "art", "bleed" and "media".

  Parameters:
    `index` - the page number. The first page is 1
    `boxName` - the box name
  Returns:
    the box rectangle or null

### getInfo

    public HashMap getInfo()

  Returns the content of the document information dictionary as a `HashMap` of `String`.

  Returns:
    content of the document information dictionary

### getNormalizedRectangle

    public static Rectangle getNormalizedRectangle(PdfArray box)

  Normalizes a `Rectangle` so that llx and lly are smaller than urx and ury.

  Parameters:
    `box` - the original rectangle
  Returns:
    a normalized `Rectangle`

### readPdf

    protected void readPdf()
                    throws IOException

  Throws:
    `IOException`

### readPdfPartial

    protected void readPdfPartial()
                           throws IOException

  Throws:
    `IOException`

### equalsArray

    private boolean equalsArray(byte[] ar1,
                                byte[] ar2,
                                int size)

### readDecryptedDocObj

    private void readDecryptedDocObj()
                              throws IOException

  Throws:
    `IOException`

### getPdfObjectRelease

    public static PdfObject getPdfObjectRelease(PdfObject obj)

  Parameters:
    `obj` -
  Returns:
    a PdfObject

### getPdfObject

    public static PdfObject getPdfObject(PdfObject obj)

  Reads a `PdfObject` resolving an indirect reference if needed.

  Parameters:
    `obj` - the `PdfObject` to read
  Returns:
    the resolved `PdfObject`

### getPdfObjectRelease

    public static PdfObject getPdfObjectRelease(PdfObject obj,
                                                PdfObject parent)

  Reads a `PdfObject` resolving an indirect reference if needed. If the reader was opened in partial mode the object will be released to save memory.

  Parameters:
    `obj` - the `PdfObject` to read
    `parent` -
  Returns:
    a PdfObject

### getPdfObject

    public static PdfObject getPdfObject(PdfObject obj,
                                         PdfObject parent)

  Parameters:
    `obj` -
    `parent` -
  Returns:
    a PdfObject

### getPdfObjectRelease

    public PdfObject getPdfObjectRelease(int idx)

  Parameters:
    `idx` -
  Returns:
    a PdfObject

### getPdfObject

    public PdfObject getPdfObject(int idx)

  Parameters:
    `idx` -
  Returns:
    aPdfObject

### resetLastXrefPartial

    public void resetLastXrefPartial()

### releaseLastXrefPartial

    public void releaseLastXrefPartial()

### releaseLastXrefPartial

    public static void releaseLastXrefPartial(PdfObject obj)

  Parameters:
    `obj` -

### setXrefPartialObject

    private void setXrefPartialObject(int idx,
                                      PdfObject obj)

### addPdfObject

    public PRIndirectReference addPdfObject(PdfObject obj)

  Parameters:
    `obj` -
  Returns:
    an indirect reference

### readPages

    protected void readPages()
                      throws IOException

  Throws:
    `IOException`

### readDocObjPartial

    protected void readDocObjPartial()
                              throws IOException

  Throws:
    `IOException`

### readSingleObject

    protected PdfObject readSingleObject(int k)
                                  throws IOException

  Throws:
    `IOException`

### readOneObjStm

    protected PdfObject readOneObjStm(PRStream stream,
                                      int idx)
                               throws IOException

  Throws:
    `IOException`

### dumpPerc

    public double dumpPerc()

  Returns:
    the percentage of the cross reference table that has been read

### readDocObj

    protected void readDocObj()
                       throws IOException

  Throws:
    `IOException`

### checkPRStreamLength

    private void checkPRStreamLength(PRStream stream)
                              throws IOException

  Throws:
    `IOException`

### readObjStm

    protected void readObjStm(PRStream stream,
                              IntHashtable map)
                       throws IOException

  Throws:
    `IOException`

### killIndirect

    public static PdfObject killIndirect(PdfObject obj)

  Eliminates the reference to the object freeing the memory used by it and clearing the xref entry.

  Parameters:
    `obj` - the object. If it's an indirect reference it will be eliminated
  Returns:
    the object or the already erased dereferenced object

### ensureXrefSize

    private void ensureXrefSize(int size)

### readXref

    protected void readXref()
                     throws IOException

  Throws:
    `IOException`

### readXrefSection

    protected PdfDictionary readXrefSection()
                                     throws IOException

  Throws:
    `IOException`

### readXRefStream

    protected boolean readXRefStream(int ptr)
                              throws IOException

  Throws:
    `IOException`

### rebuildXref

    protected void rebuildXref()
                        throws IOException

  Throws:
    `IOException`

### readDictionary

    protected PdfDictionary readDictionary()
                                    throws IOException

  Throws:
    `IOException`

### readArray

    protected PdfArray readArray()
                          throws IOException

  Throws:
    `IOException`

### readPRObject

    protected PdfObject readPRObject()
                              throws IOException

  Throws:
    `IOException`

### FlateDecode

    public static byte[] FlateDecode(byte[] in)

  Decodes a stream that has the FlateDecode filter.

  Parameters:
    `in` - the input data
  Returns:
    the decoded data

### decodePredictor

    public static byte[] decodePredictor(byte[] in,
                                         PdfObject dicPar)

  Parameters:
    `in` -
    `dicPar` -
  Returns:
    a byte array

### FlateDecode

    public static byte[] FlateDecode(byte[] in,
                                     boolean strict)

  A helper to FlateDecode.

  Parameters:
    `in` - the input data
    `strict` - `true` to read a correct stream. `false` to try to read a corrupted stream
  Returns:
    the decoded data

### ASCIIHexDecode

    public static byte[] ASCIIHexDecode(byte[] in)

  Decodes a stream that has the ASCIIHexDecode filter.

  Parameters:
    `in` - the input data
  Returns:
    the decoded data

### ASCII85Decode

    public static byte[] ASCII85Decode(byte[] in)

  Decodes a stream that has the ASCII85Decode filter.

  Parameters:
    `in` - the input data
  Returns:
    the decoded data

### LZWDecode

    public static byte[] LZWDecode(byte[] in)

  Decodes a stream that has the LZWDecode filter.

  Parameters:
    `in` - the input data
  Returns:
    the decoded data

### isRebuilt

    public boolean isRebuilt()

  Checks if the document had errors and was rebuilt.

  Returns:
    true if rebuilt.

### getPageN

    public PdfDictionary getPageN(int pageNum)

  Gets the dictionary that represents a page.

  Parameters:
    `pageNum` - the page number. 1 is the first
  Returns:
    the page dictionary

### getPageNRelease

    public PdfDictionary getPageNRelease(int pageNum)

  Parameters:
    `pageNum` -
  Returns:
    a Dictionary object

### releasePage

    public void releasePage(int pageNum)

  Parameters:
    `pageNum` -

### resetReleasePage

    public void resetReleasePage()

### getPageOrigRef

    public PRIndirectReference getPageOrigRef(int pageNum)

  Gets the page reference to this page.

  Parameters:
    `pageNum` - the page number. 1 is the first
  Returns:
    the page reference

### getPageContent

    public byte[] getPageContent(int pageNum,
                                 RandomAccessFileOrArray file)
                          throws IOException

  Gets the contents of the page.

  Parameters:
    `pageNum` - the page number. 1 is the first
    `file` - the location of the PDF document
  Returns:
    the content
  Throws:
    `IOException` - on error

### getPageContent

    public byte[] getPageContent(int pageNum)
                          throws IOException

  Gets the contents of the page.

  Parameters:
    `pageNum` - the page number. 1 is the first
  Returns:
    the content
  Throws:
    `IOException` - on error

### killXref

    protected void killXref(PdfObject obj)

### setPageContent

    public void setPageContent(int pageNum,
                               byte[] content)

  Sets the contents of the page.

  Parameters:
    `content` - the new page content
    `pageNum` - the page number. 1 is the first

### setPageContent

    public void setPageContent(int pageNum,
                               byte[] content,
                               int compressionLevel)

  Sets the contents of the page.

  Parameters:
    `content` - the new page content
    `pageNum` - the page number. 1 is the first
  Since:
    2.1.3 (the method already existed without param compressionLevel)

### getStreamBytes

    public static byte[] getStreamBytes(PRStream stream,
                                        RandomAccessFileOrArray file)
                                 throws IOException

  Get the content from a stream applying the required filters.

  Parameters:
    `stream` - the stream
    `file` - the location where the stream is
  Returns:
    the stream content
  Throws:
    `IOException` - on error

### getStreamBytes

    public static byte[] getStreamBytes(PRStream stream)
                                 throws IOException

  Get the content from a stream applying the required filters.

  Parameters:
    `stream` - the stream
  Returns:
    the stream content
  Throws:
    `IOException` - on error

### getStreamBytesRaw

    public static byte[] getStreamBytesRaw(PRStream stream,
                                           RandomAccessFileOrArray file)
                                    throws IOException

  Get the content from a stream as it is without applying any filter.

  Parameters:
    `stream` - the stream
    `file` - the location where the stream is
  Returns:
    the stream content
  Throws:
    `IOException` - on error

### getStreamBytesRaw

    public static byte[] getStreamBytesRaw(PRStream stream)
                                    throws IOException

  Get the content from a stream as it is without applying any filter.

  Parameters:
    `stream` - the stream
  Returns:
    the stream content
  Throws:
    `IOException` - on error

### eliminateSharedStreams

    public void eliminateSharedStreams()

  Eliminates shared streams if they exist.

### isTampered

    public boolean isTampered()

  Checks if the document was changed.

  Returns:
    `true` if the document was changed, `false` otherwise

### setTampered

    public void setTampered(boolean tampered)

  Sets the tampered state. A tampered PdfReader cannot be reused in PdfStamper.

  Parameters:
    `tampered` - the tampered state

### getMetadata

    public byte[] getMetadata()
                       throws IOException

  Gets the XML metadata.

  Returns:
    the XML metadata
  Throws:
    `IOException` - on error

### getLastXref

    public int getLastXref()

  Gets the byte address of the last xref table.

  Returns:
    the byte address of the last xref table

### getXrefSize

    public int getXrefSize()

  Gets the number of xref objects.

  Returns:
    the number of xref objects

### getEofPos

    public int getEofPos()

  Gets the byte address of the %%EOF marker.

  Returns:
    the byte address of the %%EOF marker

### getPdfVersion

    public char getPdfVersion()

  Gets the PDF version. Only the last version char is returned. For example version 1.4 is returned as '4'.

  Returns:
    the PDF version

### isEncrypted

    public boolean isEncrypted()

  Returns `true` if the PDF is encrypted.

  Returns:
    `true` if the PDF is encrypted

### getPermissions

    public int getPermissions()

  Gets the encryption permissions. It can be used directly in `PdfWriter.setEncryption()`.

  Returns:
    the encryption permissions

### is128Key

    public boolean is128Key()

  Returns `true` if the PDF has a 128 bit key encryption.

  Returns:
    `true` if the PDF has a 128 bit key encryption

### getTrailer

    public PdfDictionary getTrailer()

  Gets the trailer dictionary

  Returns:
    the trailer dictionary

### getDecrypt

    PdfEncryption getDecrypt()

### equalsn

    static boolean equalsn(byte[] a1,
                           byte[] a2)

### existsName

    static boolean existsName(PdfDictionary dic,
                              PdfName key,
                              PdfName value)

### getFontName

    static String getFontName(PdfDictionary dic)

### getSubsetPrefix

    static String getSubsetPrefix(PdfDictionary dic)

### shuffleSubsetNames

    public int shuffleSubsetNames()

  Finds all the font subsets and changes the prefixes to some random values.

  Returns:
    the number of font subsets altered

### createFakeFontSubsets

    public int createFakeFontSubsets()

  Finds all the fonts not subset but embedded and marks them as subset.

  Returns:
    the number of fonts altered

### getNameArray

    private static PdfArray getNameArray(PdfObject obj)

### getNamedDestination

    public HashMap getNamedDestination()

  Gets all the named destinations as an `HashMap`. The key is the name and the value is the destinations array.

  Returns:
    gets all the named destinations

### getNamedDestination

    public HashMap getNamedDestination(boolean keepNames)

  Gets all the named destinations as an `HashMap`. The key is the name and the value is the destinations array.

  Parameters:
    `keepNames` - true if you want the keys to be real PdfNames instead of Strings
  Returns:
    gets all the named destinations
  Since:
    2.1.6

### getNamedDestinationFromNames

    public HashMap getNamedDestinationFromNames()

  Gets the named destinations from the /Dests key in the catalog as an `HashMap`. The key is the name and the value is the destinations array.

  Returns:
    gets the named destinations

### getNamedDestinationFromNames

    public HashMap getNamedDestinationFromNames(boolean keepNames)

  Gets the named destinations from the /Dests key in the catalog as an `HashMap`. The key is the name and the value is the destinations array.

  Parameters:
    `keepNames` - true if you want the keys to be real PdfNames instead of Strings
  Returns:
    gets the named destinations
  Since:
    2.1.6

### getNamedDestinationFromStrings

    public HashMap getNamedDestinationFromStrings()

  Gets the named destinations from the /Names key in the catalog as an `HashMap`. The key is the name and the value is the destinations array.

  Returns:
    gets the named destinations

### removeFields

    public void removeFields()

  Removes all the fields from the document.

### removeAnnotations

    public void removeAnnotations()

  Removes all the annotations and fields from the document.

### getLinks

    public ArrayList getLinks(int page)

### iterateBookmarks

    private void iterateBookmarks(PdfObject outlineRef,
                                  HashMap names)

### makeRemoteNamedDestinationsLocal

    public void makeRemoteNamedDestinationsLocal()

  Replaces remote named links with local destinations that have the same name.

  Since:
    5.0

### convertNamedDestination

    private boolean convertNamedDestination(PdfObject obj,
                                            HashMap names)

  Converts a remote named destination GoToR with a local named destination if there's a corresponding name.

  Parameters:
    `obj` - an annotation that needs to be screened for links to external named destinations.
    `names` - a map with names of local named destinations
  Since:
    iText 5.0

### consolidateNamedDestinations

    public void consolidateNamedDestinations()

  Replaces all the local named links with the actual destinations.

### replaceNamedDestination

    private boolean replaceNamedDestination(PdfObject obj,
                                            HashMap names)

### duplicatePdfDictionary

    protected static PdfDictionary duplicatePdfDictionary(PdfDictionary original,
                                                          PdfDictionary copy,
                                                          PdfReader newReader)

### duplicatePdfObject

    protected static PdfObject duplicatePdfObject(PdfObject original,
                                                  PdfReader newReader)

### close

    public void close()

  Closes the reader

### removeUnusedNode

    protected void removeUnusedNode(PdfObject obj,
                                    boolean[] hits)

### removeUnusedObjects

    public int removeUnusedObjects()

  Removes all the unreachable objects.

  Returns:
    the number of indirect objects removed

### getAcroFields

    public AcroFields getAcroFields()

  Gets a read-only version of `AcroFields`.

  Returns:
    a read-only version of `AcroFields`

### getJavaScript

    public String getJavaScript(RandomAccessFileOrArray file)
                         throws IOException

  Gets the global document JavaScript.

  Parameters:
    `file` - the document file
  Returns:
    the global document JavaScript
  Throws:
    `IOException` - on error

### getJavaScript

    public String getJavaScript()
                         throws IOException

  Gets the global document JavaScript.

  Returns:
    the global document JavaScript
  Throws:
    `IOException` - on error

### selectPages

    public void selectPages(String ranges)

  Selects the pages to keep in the document. The pages are described as ranges. The page ordering can be changed but no page repetitions are allowed. Note that it may be very slow in partial mode.

  Parameters:
    `ranges` - the comma separated ranges as described in `SequenceList`

### selectPages

    public void selectPages(List pagesToKeep)

  Selects the pages to keep in the document. The pages are described as a `List` of `Integer`. The page ordering can be changed but no page repetitions are allowed. Note that it may be very slow in partial mode.

  Parameters:
    `pagesToKeep` - the pages to keep in the document

### setViewerPreferences

    public void setViewerPreferences(int preferences)

  Sets the viewer preferences as the sum of several constants.

  Specified by:
    `setViewerPreferences` in interface `PdfViewerPreferences`
  Parameters:
    `preferences` - the viewer preferences
  See Also:
    `PdfViewerPreferences.setViewerPreferences(int)`

### addViewerPreference

    public void addViewerPreference(PdfName key,
                                    PdfObject value)

  Adds a viewer preference

  Specified by:
    `addViewerPreference` in interface `PdfViewerPreferences`
  Parameters:
    `key` - a key for a viewer preference
    `value` - a value for the viewer preference
  See Also:
    `PdfViewerPreferences.addViewerPreference(com.lowagie.text.pdf.PdfName, com.lowagie.text.pdf.PdfObject)`

### setViewerPreferences

    void setViewerPreferences(PdfViewerPreferencesImp vp)

### getSimpleViewerPreferences

    public int getSimpleViewerPreferences()

  Returns a bitset representing the PageMode and PageLayout viewer preferences. Doesn't return any information about the ViewerPreferences dictionary.

  Returns:
    an int that contains the Viewer Preferences.

### isAppendable

    public boolean isAppendable()

  Getter for property appendable.

  Returns:
    Value of property appendable.

### setAppendable

    public void setAppendable(boolean appendable)

  Setter for property appendable.

  Parameters:
    `appendable` - New value of property appendable.

### isNewXrefType

    public boolean isNewXrefType()

  Getter for property newXrefType.

  Returns:
    Value of property newXrefType.

### getFileLength

    public int getFileLength()

  Getter for property fileLength.

  Returns:
    Value of property fileLength.

### isHybridXref

    public boolean isHybridXref()

  Getter for property hybridXref.

  Returns:
    Value of property hybridXref.

### getCryptoRef

    PdfIndirectReference getCryptoRef()

### removeUsageRights

    public void removeUsageRights()

  Removes any usage rights that this PDF may have. Only Adobe can grant usage rights and any PDF modification with iText will invalidate them. Invalidated usage rights may confuse Acrobat and it's advisable to remove them altogether.

### getCertificationLevel

    public int getCertificationLevel()

  Gets the certification level for this document. The return values can be `PdfSignatureAppearance.NOT_CERTIFIED`, `PdfSignatureAppearance.CERTIFIED_NO_CHANGES_ALLOWED`, `PdfSignatureAppearance.CERTIFIED_FORM_FILLING` and `PdfSignatureAppearance.CERTIFIED_FORM_FILLING_AND_ANNOTATIONS`.

  No signature validation is made, use the methods available for that in `AcroFields`.

  Returns:
    gets the certification level for this document

### isOpenedWithFullPermissions

    public final boolean isOpenedWithFullPermissions()

  Checks if the document was opened with the owner password so that the end application can decide what level of access restrictions to apply. If the document is not encrypted it will return `true`.

  Returns:
    `true` if the document was opened with the owner password or if it's not encrypted, `false` if the document was opened with the user password

### getCryptoMode

    public int getCryptoMode()

### isMetadataEncrypted

    public boolean isMetadataEncrypted()

### computeUserPassword

    public byte[] computeUserPassword()

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