Class FileTypeDetector
A file type detector is a concrete implementation of this class, has a zero-argument constructor, and implements the abstract methods specified below.
The means by which a file type detector determines the file type is highly implementation specific. A simple implementation might examine the file extension (a convention used in some platforms) and map it to a file type. In other cases, the file type may be stored as a file attribute or the bytes in a file may be examined to guess its file type.
- Since:
- 1.7
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Constructor Summary
ConstructorsModifierConstructorDescriptionprotectedInitializes a new instance of this class. -
Method Summary
Modifier and TypeMethodDescriptionabstract StringprobeContentType(Path path) Probes the given file to guess its content type.Methods declared in class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitModifier and TypeMethodDescriptionprotected Objectclone()Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.booleanCompares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.protected voidfinalize()Deprecated, for removal: This API element is subject to removal in a future version.May cause performance issues, deadlocks and hangs.getClass()Answers the unique instance of java.lang.Class which represents the class of the receiver.inthashCode()Answers an integer hash code for the receiver.final voidnotify()Causes one thread which iswaiting on the receiver to be made ready to run.final voidCauses all threads which arewaiting on the receiver to be made ready to run.toString()Answers a string containing a concise, human-readable description of the receiver.final voidwait()Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated bynotifyornotifyAll).final voidwait(long time) Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated bynotifyornotifyAll) or the expiration of the timeout.final voidwait(long time, int frac) Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated bynotifyornotifyAll) or the expiration of the timeout.
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Constructor Details
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FileTypeDetector
protected FileTypeDetector()Initializes a new instance of this class.
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Method Details
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probeContentType
Probes the given file to guess its content type.The means by which this method determines the file type is highly implementation specific. It may simply examine the file name, it may use a file attribute, or it may examine bytes in the file.
The probe result is the string form of the value of a Multipurpose Internet Mail Extension (MIME) content type as defined by RFC 2045: Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies. The string must be parsable according to the grammar in the RFC 2045.
- Parameters:
path- the path to the file to probe- Returns:
- The content type or
nullif the file type is not recognized - Throws:
IOException- An I/O error occurs- External Specifications
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