org.mycore.datamodel.ifs
Class MCRSimpleFCTDetector.MCRPatternRule

java.lang.Object
  org.mycore.datamodel.ifs.MCRSimpleFCTDetector.MCRDetectionRule
      org.mycore.datamodel.ifs.MCRSimpleFCTDetector.MCRPatternRule

Enclosing class:

MCRSimpleFCTDetector

 class MCRSimpleFCTDetector.MCRPatternRule
extends MCRSimpleFCTDetector.MCRDetectionRule

A rule that decides based on a magic bytes pattern that has to occur in the file header at a given offset

Field Summary

protected int	offset The offset where the magic bytes are located in the file header
protected byte[]	pattern The byte pattern (magic bytes)

Fields inherited from class org.mycore.datamodel.ifs.MCRSimpleFCTDetector.MCRDetectionRule

score

Constructor Summary

MCRSimpleFCTDetector.MCRPatternRule(String pattern, String format, int offset, double score)
Creates a new rule for a match based on a magic bytes pattern at a given offset

Method Summary

(package private) double

getScore(String filename, byte[] header) Returns the score if filename and/or header matches this rule, or 0.0

Methods inherited from class java.lang.Object

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

Field Detail

pattern

protected byte[] pattern

The byte pattern (magic bytes)

offset

protected int offset

The offset where the magic bytes are located in the file header

Constructor Detail

MCRSimpleFCTDetector.MCRPatternRule

MCRSimpleFCTDetector.MCRPatternRule(String pattern,
                                    String format,
                                    int offset,
                                    double score)

Creates a new rule for a match based on a magic bytes pattern at a given offset

Parameters:

pattern - the magic bytes pattern this rule matches

format - the format in which the pattern is given, text | hex | bytes

offset - the position where the pattern occurs in the file header

score - the score for matching this rule, a value between 0.0 and 1.0

Method Detail

getScore

double getScore(String filename,
                byte[] header)

Description copied from class: MCRSimpleFCTDetector.MCRDetectionRule

Returns the score if filename and/or header matches this rule, or 0.0

Specified by:

getScore in class MCRSimpleFCTDetector.MCRDetectionRule

Parameters:

filename - the name of the file to detect the content type of

header - the first bytes of the file content

Returns:

the score between 0.0 and 1.0 for matching this rule