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Eclipse Platform
Release 3.5
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org.eclipse.core.runtime.content
Interface IContentType

All Superinterfaces:
IContentTypeSettings 
public interface IContentType

extends 
IContentTypeSettings

Content types represent and provide information on file types, such as associated file names/extensions, default charset, etc.

This interface is not intended to be implemented by clients.

Since:
3.0

Field Summary
static int FILE_EXTENSION_SPEC
          File spec type constant, indicating a file extension specification.
static int FILE_NAME_SPEC
          File spec type constant, indicating a file name specification.
static int IGNORE_PRE_DEFINED
          File spec type flag constant, indicating that predefined file specifications should not be taken into account.
static int IGNORE_USER_DEFINED
          File spec type flag constant, indicating that user-defined file specifications should not be taken into account.
 
Method Summary
  IContentType getBaseType ()
          Returns a reference to this content type's base type.
  String getDefaultCharset ()
          Returns the default charset for this content type if one has been defined, null otherwise.
  IContentDescription getDefaultDescription ()
          Returns the default content description for this content type.
  IContentDescription getDescriptionFor ( InputStream contents, QualifiedName[] options)
          Tries to obtain a description for the given contents.
  IContentDescription getDescriptionFor ( Reader contents, QualifiedName[] options)
          Tries to obtain a description for the given contents.
  String[] getFileSpecs (int type)
          Returns file specifications from this content type.
  String getId ()
          Returns this content type's unique identifier.
  String getName ()
          Returns a user-friendly name for this content type.
  IContentTypeSettings getSettings ( IScopeContext context)
          Returns the settings for this content type in the given preference context.
 boolean isAssociatedWith ( String fileName)
          Returns whether this content type is associated with the given file name.
 boolean isAssociatedWith ( String fileName, IScopeContext context)
          Returns whether this content type is associated with the given file name in the given preference scope.
 boolean isKindOf ( IContentType another)
          Returns whether this content type is a kind of the given content type.
 
Methods inherited from interface org.eclipse.core.runtime.content. IContentTypeSettings
addFileSpec, removeFileSpec, setDefaultCharset
 

Field Detail

IGNORE_PRE_DEFINED

static final int IGNORE_PRE_DEFINED
File spec type flag constant, indicating that predefined file specifications should not be taken into account.

See Also:
Constant Field Values

IGNORE_USER_DEFINED

static final int IGNORE_USER_DEFINED
File spec type flag constant, indicating that user-defined file specifications should not be taken into account.

See Also:
Constant Field Values

FILE_NAME_SPEC

static final int FILE_NAME_SPEC
File spec type constant, indicating a file name specification.

See Also:
Constant Field Values

FILE_EXTENSION_SPEC

static final int FILE_EXTENSION_SPEC
File spec type constant, indicating a file extension specification.

See Also:
Constant Field Values
Method Detail

getBaseType


IContentType getBaseType()
Returns a reference to this content type's base type. If this content type does not have a base type (it is a root type), returns null.

Returns:
this content type's base type, or null

getDefaultDescription


IContentDescription getDefaultDescription()
Returns the default content description for this content type. A default content description is returned by the content type API whenever content analysis could not find any particular information to be described about the contents being processed, so all default attributes for the content type in question apply.

Clients doing caching of content descriptions may choose to treat default descriptions in a special manner, since they are easily recoverable through this API.

Returns:
a content description
Since:
3.1

getDescriptionFor


IContentDescription getDescriptionFor(
InputStream contents,
                                      
QualifiedName[] options)
                                      throws 
IOException
Tries to obtain a description for the given contents.

Any IOExceptions that may occur while reading the given input stream will flow to the caller. The input stream will not be closed by this operation.

Parameters:
contents - the contents to be interpreted
options - an array of keys for all properties that should be described
Returns:
a content description if one could be obtained, or null
Throws:
IOException - if an error occurs while reading the contents
See Also:
IContentDescription

getDescriptionFor


IContentDescription getDescriptionFor(
Reader contents,
                                      
QualifiedName[] options)
                                      throws 
IOException
Tries to obtain a description for the given contents.

Any IOExceptions that may occur while reading the given reader will flow to the caller. The reader will not be closed by this operation.

Parameters:
contents - the contents to be interpreted
options - an array of keys for all properties that should be described
Returns:
a content description if one could be obtained, or null
Throws:
UnsupportedOperationException - if this content type has a describer that does not implement ITextContentDescriber
IOException - if an error occurs while reading the contents
See Also:
IContentDescription

getDefaultCharset


String getDefaultCharset()
Returns the default charset for this content type if one has been defined, null otherwise. This refinement of the corresponding IContentTypeSettings method also takes into account the charset defined by the content type provider (or its base content type).

Specified by:
getDefaultCharset in interface IContentTypeSettings
Returns:
the default charset, or null

getFileSpecs


String[] getFileSpecs(int type)
Returns file specifications from this content type. The type mask is a bit-wise or of file specification type constants indicating the file specification types of interest. This refinement of the corresponding IContentTypeSettings method supports additional flags because it also takes into account the file specifications defined by the content type provider (or its base content type).

Specified by:
getFileSpecs in interface IContentTypeSettings
Parameters:
type - a bit-wise or of file specification type constants. Valid flags are:
  • one of FILE_EXTENSION_SPEC or FILE_NAME_SPEC
  • and optionally, one of IGNORE_PRE_DEFINED or IGNORE_USER_DEFINED
Returns:
the file specification
See Also:
FILE_NAME_SPEC, FILE_EXTENSION_SPEC, IGNORE_PRE_DEFINED, IGNORE_USER_DEFINED

getId


String getId()
Returns this content type's unique identifier. Each content type has an identifier by which they can be retrieved from the content type catalog.

Specified by:
getId in interface IContentTypeSettings
Returns:
this content type's unique identifier

getName


String getName()
Returns a user-friendly name for this content type.

Returns:
this content type's name

isAssociatedWith

boolean isAssociatedWith(
String fileName)
Returns whether this content type is associated with the given file name.

Parameters:
fileName - the file name
Returns:
true if this content type is associated with the given file name, false otherwise
See Also:
isAssociatedWith(String, IScopeContext)

isAssociatedWith

boolean isAssociatedWith(
String fileName,
                         
IScopeContext context)
Returns whether this content type is associated with the given file name in the given preference scope.

Parameters:
fileName - the file name
context - a preference scope context
Returns:
true if this content type is associated with the given file name, false otherwise
Since:
3.1

isKindOf

boolean isKindOf(
IContentType another)
Returns whether this content type is a kind of the given content type. A content type A is a kind of a content type B if:
  1. A and B are the same content type, or
  2. A's base type is B, or
  3. A's base type is a kind of B.

Parameters:
another - a content type
Returns:
true if this content type is a kind of the given content type, false otherwise

getSettings


IContentTypeSettings getSettings(
IScopeContext context)
                                 throws 
CoreException
Returns the settings for this content type in the given preference context.

Parameters:
context - a preference scope context
Returns:
setting in the given context
Throws:
CoreException - if this method fails. Reasons include:
  • An error occurred obtaining the settings.
Since:
3.1
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Eclipse Platform
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