com.sdl.context.resource

Class ContentTypeAcquirer

java.lang.Object

com.sdl.context.resource.ContentTypeAcquirer

All Implemented Interfaces:

Serializable

@Component
public final class ContentTypeAcquirer
extends Object
implements Serializable

Class which provides methods related to the acquisition of content types.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ContentTypeAcquirer()

Method Summary

Modifier and Type	Method and Description
String	deriveContentTypeFromInputStream(Resource resource) Return content type from a resource (primarily using it's input stream).
String	getContentTypeFromExtension(String extension) Returns the content type for the specified extension.
String	getContentTypeFromPushbackInputStream(PushbackInputStream pushbackInputStream) Get the file content type from a PushbackInputStream (it will do this without consuming any bytes from the PushbackInputStream stream).
Map<String,String>	getContentTypesMap()
String	getExtensionFromContentType(String contentType) Returns a file extension for a specified content type.
String	getExtensionFromName(String uri)
Map<String,String>	getExtensionTypesMap()
PushbackInputStream	getPushbackInputStream(InputStream inputStream) Create a PushbackInputStream which is suitable for passing to the getContentTypeFromPushbackInputStream method.
boolean	isSupportedImageContentType(String contentType)
boolean	isSupportedImageExtension(String extension)

Methods inherited from class java.lang.Object

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

Constructor Detail

ContentTypeAcquirer

public ContentTypeAcquirer()

Method Detail

deriveContentTypeFromInputStream

public String deriveContentTypeFromInputStream(Resource resource)
                                        throws IOException

Return content type from a resource (primarily using it's input stream).

Parameters:

resource - the resource

Returns:

the content type e.g. "image/gif"

Throws:

IOException

getPushbackInputStream

public PushbackInputStream getPushbackInputStream(InputStream inputStream)

Create a PushbackInputStream which is suitable for passing to the getContentTypeFromPushbackInputStream method.

Parameters:

inputStream - the file input stream

Returns:

a wrapper PushbackInputStream

getContentTypeFromPushbackInputStream

public String getContentTypeFromPushbackInputStream(PushbackInputStream pushbackInputStream)
                                             throws IOException

Get the file content type from a PushbackInputStream (it will do this without consuming any bytes from the PushbackInputStream stream).

Parameters:

pushbackInputStream - the file stream wrapped in a pushbackInputStream

Returns:

the file content type e.g. "image/gif"

Throws:

IOException

getContentTypeFromExtension

public String getContentTypeFromExtension(String extension)

Returns the content type for the specified extension. For example 1) "jpg" will return "image/jpeg" 2) "gif" will return "image/gif" 3) "jpeg" will return "image/jpeg"

Parameters:

extension - the extension of the file

Returns:

a file content type

getExtensionFromContentType

public String getExtensionFromContentType(String contentType)

Returns a file extension for a specified content type. Note that each content type can have more than one file extension, this will return one of them. Only use this method if you don't have a better way of getting the file extension

For example 1) "image/jpeg" will return "jpg" 2) "image/gif" will return "gif"

Parameters:

contentType - the content type of the file

Returns:

the file extension

getExtensionFromName

public String getExtensionFromName(String uri)

isSupportedImageExtension

public boolean isSupportedImageExtension(String extension)

isSupportedImageContentType

public boolean isSupportedImageContentType(String contentType)

getExtensionTypesMap

public Map<String,String> getExtensionTypesMap()

getContentTypesMap

public Map<String,String> getContentTypesMap()