Class ContentTypeDetectingInputStreamWrapper

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

java.io.BufferedInputStream

org.openpdf.util.ContentTypeDetectingInputStreamWrapper

All Implemented Interfaces:

Closeable, AutoCloseable

public class ContentTypeDetectingInputStreamWrapper
extends BufferedInputStream

This class wraps an input stream and detects if it contains certain content using "magic numbers". ...

currently only pdf detection is implemented

Field Summary

Fields

Modifier and Type	Field	Description
private final byte[]	firstBytes
private static final byte[]	MAGIC_BYTES_PDF
private static final int	MAX_MAGIC_BYTES
private static final byte[]	NO_DATA

Fields inherited from class BufferedInputStream

buf, count, marklimit, markpos, pos

Fields inherited from class FilterInputStream

in

Constructor Summary

Constructors

Constructor	Description
ContentTypeDetectingInputStreamWrapper(InputStream source)

Method Summary

Modifier and Type	Method	Description
boolean	isPdf()
private static byte[]	readFirstBytes(InputStream in, int count)
private boolean	streamStartsWithMagicBytes(byte[] bytes)

Methods inherited from class BufferedInputStream

available, close, mark, markSupported, read, read, reset, skip, transferTo

Methods inherited from class FilterInputStream

read

Methods inherited from class InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes

Methods inherited from class Object

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

Field Details

MAGIC_BYTES_PDF

private static final byte[] MAGIC_BYTES_PDF

MAX_MAGIC_BYTES

private static final int MAX_MAGIC_BYTES

See Also:

• Constant Field Values

NO_DATA

private static final byte[] NO_DATA

firstBytes

private final byte[] firstBytes

Constructor Details

ContentTypeDetectingInputStreamWrapper

public ContentTypeDetectingInputStreamWrapper(InputStream source)
                                       throws IOException

Throws:

IOException

Method Details

readFirstBytes

private static byte[] readFirstBytes(InputStream in,
 int count)
                              throws IOException

Throws:

IOException

streamStartsWithMagicBytes

private boolean streamStartsWithMagicBytes(byte[] bytes)

isPdf

public boolean isPdf()