com.drew.metadata

Class TagDescriptor

public abstract class TagDescriptor extends Object implements Serializable

Abstract base class for all tag descriptor classes. Implementations are responsible for providing the human-readable string represenation of tag values stored in a directory. The directory is provided to the tag descriptor via its constructor.
Field Summary
protected Directory_directory
Constructor Summary
TagDescriptor(Directory directory)
Method Summary
abstract StringgetDescription(int tagType)
Returns a descriptive value of the the specified tag for this image.

Field Detail

_directory

protected final Directory _directory

Constructor Detail

TagDescriptor

public TagDescriptor(Directory directory)

Method Detail

getDescription

public abstract String getDescription(int tagType)
Returns a descriptive value of the the specified tag for this image. Where possible, known values will be substituted here in place of the raw tokens actually kept in the Exif segment. If no substitution is available, the value provided by getString(int) will be returned.

This and getString(int) are the only 'get' methods that won't throw an exception.

Parameters: tagType the tag to find a description for

Returns: a description of the image's value for the specified tag, or null if the tag hasn't been defined.

Copyright © 2006 Drew Noakes. All Rights Reserved.