org.apache.tika.mime

Class MediaTypeRegistry

java.lang.Object

org.apache.tika.mime.MediaTypeRegistry

All Implemented Interfaces:

Serializable

public class MediaTypeRegistry
extends Object
implements Serializable

Registry of known Internet media types.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MediaTypeRegistry()

Method Summary

Methods

Modifier and Type	Method and Description
void	addAlias(MediaType type, MediaType alias)
void	addSuperType(MediaType type, MediaType supertype)
void	addType(MediaType type)
SortedSet<MediaType>	getAliases(MediaType type) Returns the set of known aliases of the given canonical media type.
static MediaTypeRegistry	getDefaultRegistry() Returns the built-in media type registry included in Tika.
MediaType	getSupertype(MediaType type) Returns the supertype of the given type.
SortedSet<MediaType>	getTypes() Returns the set of all known canonical media types.
boolean	isInstanceOf(MediaType a, MediaType b) Checks whether the given media type equals the given base type or is a specialization of it.
boolean	isInstanceOf(String a, MediaType b) Parses and normalises the given media type string and checks whether the result equals the given base type or is a specialization of it.
boolean	isSpecializationOf(MediaType a, MediaType b) Checks whether the given media type a is a specialization of a more generic type b.
MediaType	normalize(MediaType type)

Methods inherited from class java.lang.Object

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

Constructor Detail

MediaTypeRegistry

public MediaTypeRegistry()

Method Detail

getDefaultRegistry

public static MediaTypeRegistry getDefaultRegistry()

Returns the built-in media type registry included in Tika.

Returns:

default media type registry

Since:

Apache Tika 0.8

getTypes

public SortedSet<MediaType> getTypes()

Returns the set of all known canonical media types. Type aliases are not included in the returned set.

Returns:

canonical media types

Since:

Apache Tika 0.8

getAliases

public SortedSet<MediaType> getAliases(MediaType type)

Returns the set of known aliases of the given canonical media type.

Parameters:

type - canonical media type

Returns:

known aliases

Since:

Apache Tika 0.8

addType

public void addType(MediaType type)

addAlias

public void addAlias(MediaType type,
            MediaType alias)

addSuperType

public void addSuperType(MediaType type,
                MediaType supertype)

normalize

public MediaType normalize(MediaType type)

isSpecializationOf

public boolean isSpecializationOf(MediaType a,
                         MediaType b)

Checks whether the given media type a is a specialization of a more generic type b. Both types should be already normalised.

Parameters:

a - media type, normalised

b - suspected supertype, normalised

Returns:

true if b is a supertype of a, false otherwise

Since:

Apache Tika 0.8

isInstanceOf

public boolean isInstanceOf(MediaType a,
                   MediaType b)

Checks whether the given media type equals the given base type or is a specialization of it. Both types should be already normalised.

Parameters:

a - media type, normalised

b - base type, normalised

Returns:

true if b equals a or is a specialization of it, false otherwise

Since:

Apache Tika 1.2

isInstanceOf

public boolean isInstanceOf(String a,
                   MediaType b)

Parses and normalises the given media type string and checks whether the result equals the given base type or is a specialization of it. The given base type should already be normalised.

Parameters:

a - media type

b - base type, normalised

Returns:

true if b equals a or is a specialization of it, false otherwise

Since:

Apache Tika 1.2

getSupertype

public MediaType getSupertype(MediaType type)

Returns the supertype of the given type. If the media type database has an explicit inheritance rule for the type, then that is used. Next, if the given type has any parameters, then the respective base type (parameter-less) is returned. Otherwise built-in heuristics like text/... -> text/plain and .../...+xml -> application/xml are used. Finally application/octet-stream is returned for all types for which no other supertype is known, and the return value for application/octet-stream is null.

Parameters:

type - media type

Returns:

supertype, or null for application/octet-stream

Since:

Apache Tika 0.8