com.sun.pdfview.decode
Class PDFDecoder
java.lang.Object
com.sun.pdfview.decode.PDFDecoder
public class PDFDecoder
- extends java.lang.Object
A PDF Decoder encapsulates all the methods of decoding a stream of bytes
based on all the various encoding methods.
You should use the decodeStream() method of this object rather than using
any of the decoders directly.
Field Summary |
static java.util.Set<java.lang.String> |
DCT_FILTERS
|
Method Summary |
static java.nio.ByteBuffer |
decodeStream(PDFObject dict,
java.nio.ByteBuffer streamBuf,
java.util.Set<java.lang.String> filterLimits)
decode a byte[] stream using the filters specified in the object's
dictionary (passed as argument 1). |
static boolean |
isEncrypted(PDFObject dict)
Determines whether a stream is encrypted or not; note that encodings
(e.g., Flate, LZW) are not considered encryptions. |
static boolean |
isLastFilter(PDFObject dict,
java.util.Set<java.lang.String> filters)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
DCT_FILTERS
public static final java.util.Set<java.lang.String> DCT_FILTERS
isLastFilter
public static boolean isLastFilter(PDFObject dict,
java.util.Set<java.lang.String> filters)
throws java.io.IOException
- Throws:
java.io.IOException
decodeStream
public static java.nio.ByteBuffer decodeStream(PDFObject dict,
java.nio.ByteBuffer streamBuf,
java.util.Set<java.lang.String> filterLimits)
throws java.io.IOException
- decode a byte[] stream using the filters specified in the object's
dictionary (passed as argument 1).
- Parameters:
dict
- the dictionary associated with the streamstreamBuf
- the data in the stream, as a byte buffer
- Throws:
java.io.IOException
isEncrypted
public static boolean isEncrypted(PDFObject dict)
throws java.io.IOException
- Determines whether a stream is encrypted or not; note that encodings
(e.g., Flate, LZW) are not considered encryptions.
- Parameters:
dict
- the stream dictionary
- Returns:
- whether the stream is encrypted
- Throws:
java.io.IOException
- if the stream dictionary can't be read