public class MagicDetector extends Object implements Detector
Constructor and Description |
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MagicDetector(MediaType type,
byte[] pattern)
Creates a detector for input documents that have the exact given byte
pattern at the beginning of the document stream.
|
MagicDetector(MediaType type,
byte[] pattern,
byte[] mask,
boolean isRegex,
boolean isStringIgnoreCase,
int offsetRangeBegin,
int offsetRangeEnd)
Creates a detector for input documents that meet the specified
magic match.
|
MagicDetector(MediaType type,
byte[] pattern,
byte[] mask,
boolean isRegex,
int offsetRangeBegin,
int offsetRangeEnd)
Creates a detector for input documents that meet the specified
magic match.
|
MagicDetector(MediaType type,
byte[] pattern,
byte[] mask,
int offsetRangeBegin,
int offsetRangeEnd)
Creates a detector for input documents that meet the specified magic
match.
|
MagicDetector(MediaType type,
byte[] pattern,
int offset)
Creates a detector for input documents that have the exact given byte
pattern at the given offset of the document stream.
|
Modifier and Type | Method and Description |
---|---|
MediaType |
detect(InputStream input,
Metadata metadata)
Detects the content type of the given input document.
|
int |
getLength() |
static MagicDetector |
parse(MediaType mediaType,
String type,
String offset,
String value,
String mask) |
String |
toString()
Returns a string representation of the Detection Rule.
|
public MagicDetector(MediaType type, byte[] pattern)
type
- matching media typepattern
- magic match patternpublic MagicDetector(MediaType type, byte[] pattern, int offset)
type
- matching media typepattern
- magic match patternoffset
- offset of the pattern matchpublic MagicDetector(MediaType type, byte[] pattern, byte[] mask, int offsetRangeBegin, int offsetRangeEnd)
pattern
must NOT be a regular expression.
Constructor maintained for legacy reasons.public MagicDetector(MediaType type, byte[] pattern, byte[] mask, boolean isRegex, int offsetRangeBegin, int offsetRangeEnd)
public MagicDetector(MediaType type, byte[] pattern, byte[] mask, boolean isRegex, boolean isStringIgnoreCase, int offsetRangeBegin, int offsetRangeEnd)
public static MagicDetector parse(MediaType mediaType, String type, String offset, String value, String mask)
public MediaType detect(InputStream input, Metadata metadata) throws IOException
Detector
application/octet-stream
if the type of the document
can not be detected.
If the document input stream is not available, then the first
argument may be null
. Otherwise the detector may
read bytes from the start of the stream to help in type detection.
The given stream is guaranteed to support the
mark feature
and the detector
is expected to mark
the stream before
reading any bytes from it, and to reset
the stream before returning. The stream must not be closed by the
detector.
The given input metadata is only read, not modified, by the detector.
detect
in interface Detector
input
- document input stream, or null
metadata
- ignoredapplication/octet-stream
IOException
- if the document input stream could not be readpublic int getLength()
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