Package htsjdk.beta.io.bundle

Class SeekableStreamResource

java.lang.Object

htsjdk.beta.io.bundle.BundleResourceBase

htsjdk.beta.io.bundle.InputStreamResource

htsjdk.beta.io.bundle.SeekableStreamResource

All Implemented Interfaces:

BundleResource, Serializable

public class SeekableStreamResource
extends InputStreamResource

A BundleResource backed by a SeekableStream.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
SeekableStreamResource(SeekableStream seekableStream, String displayName, String contentType)	Create a BundleResource backed by an SeekableStream, specifying a display name and content type.
SeekableStreamResource(SeekableStream seekableStream, String displayName, String contentType, String format)	Create a BundleResource backed by an SeekableStream, specifying a display name, content type and format.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
Optional<InputStream>	getInputStream()	Get the SeekableStream managed by this resource as an InputStream.
Optional<SeekableStream>	getSeekableStream()	Get a SeekableStream for this resource, or Optional.empty.
SignatureStream	getSignatureStream(int signatureProbeLength)	Get a SignatureStream for this resource.
int	hashCode()
boolean	hasInputType()	Return true if is this resource is backed by a type that can be used for input.
boolean	hasSeekableStream()	Returns true if this resource can be rendered as a SeekableStream.
String	toString()

Methods inherited from class htsjdk.beta.io.bundle.BundleResourceBase

getContentType, getDisplayName, getFileFormat, getIOPath, getOutputStream, hasOutputType

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

SeekableStreamResource

public SeekableStreamResource(SeekableStream seekableStream,
 String displayName,
 String contentType)

Create a BundleResource backed by an SeekableStream, specifying a display name and content type.

Parameters:

seekableStream - The SeekableStream to use for this resource. May not be null.

displayName - The display name for this resource. May not be null or 0-length.

contentType - The content type for this resource. May not be null or 0-length.

SeekableStreamResource

public SeekableStreamResource(SeekableStream seekableStream,
 String displayName,
 String contentType,
 String format)

Create a BundleResource backed by an SeekableStream, specifying a display name, content type and format.

Parameters:

seekableStream - The SeekableStream to use for this resource. May not be null.

displayName - The display name for this resource. May not be null or 0-length.

contentType - The content type for this resource. May not be null or 0-length.

format - The format for this resource. May not be null or 0-length.

Method Details

getInputStream

public Optional<InputStream> getInputStream()

Get the SeekableStream managed by this resource as an InputStream. Does not alter or reset the underlying stream.

Specified by:

getInputStream in interface BundleResource

Overrides:

getInputStream in class InputStreamResource

Returns:

the seekable stream managed by this resource, without resetting the stream's state

getSeekableStream

public Optional<SeekableStream> getSeekableStream()

Description copied from interface: BundleResource

Get a SeekableStream for this resource, or Optional.empty.

Specified by:

getSeekableStream in interface BundleResource

Overrides:

getSeekableStream in class BundleResourceBase

Returns:

an SeekableStream for this resource, or Optional.empty if this is not an input type (see BundleResource.hasInputType()), or is an input type for which no SeekableStream can be obtained (see BundleResource.hasSeekableStream()).

getSignatureStream

public SignatureStream getSignatureStream(int signatureProbeLength)

Get a SignatureStream for this resource. This method requires access to the first signatureProbeLength bytes of the underlying resource. BundleResource implementations that are backed by raw streams that can only be consumed once, such as InputStreamResource, may consume and buffer a portion of the underlying resource's stream in order to allow subsequent callers of the BundleResource.getInputStream()) method to be presented with the entire stream, including the signature. Calls to this method may have the side effect of changing or resetting the current position of the underlying stream; serial calls to BundleResource.getSignatureStream(int) on the same object are not necessarily idempotent; and implementations are free to throw to prevent serial calls to this method.

Specified by:

getSignatureStream in interface BundleResource

Overrides:

getSignatureStream in class InputStreamResource

Parameters:

signatureProbeLength - the number of bytes of the underlying resource to include in the SignatureStream stream. signatureProbeLength should be expressed in "compressed(/encrypted)" space rather than "plaintext" space. For example, a file format signature may consist of n bytes of ASCII, but for formats that use compressed streams, the codec may need access to an entire compressed block in order to inspect those n bytes. signatureProbeLength should use the compressed block size, in order to ensure that the SignatureStream contains a semantically meaningful fragment of the underlying input.

Returns:

Get a SignatureProbeStream on this resource. Resets the underlying seekable stream.

hasInputType

public boolean hasInputType()

Description copied from interface: BundleResource

Return true if is this resource is backed by a type that can be used for input. Some resource types, such as InputStreamResource, can be used for input but not for output (see BundleResource.hasOutputType(). Others, such as OutputStreamResource, can be used for output but not for input. Some resource types may be suitable for both (for example see IOPathResource).

The determination is based only on the type of the resource, and does not imply a guarantee about whether the resource type is actually readable.

Specified by:

hasInputType in interface BundleResource

Overrides:

hasInputType in class InputStreamResource

Returns:

true if the type of this resource makes it suitable for use as a source of input.

hasSeekableStream

public boolean hasSeekableStream()

Description copied from interface: BundleResource

Returns true if this resource can be rendered as a SeekableStream.

Specified by:

hasSeekableStream in interface BundleResource

Overrides:

hasSeekableStream in class BundleResourceBase

Returns:

true if this resource can be rendered as a SeekableStream (see BundleResource.getSeekableStream())

equals

public boolean equals(Object o)

Overrides:

equals in class InputStreamResource

hashCode

public int hashCode()

Overrides:

hashCode in class InputStreamResource

toString

public String toString()

Overrides:

toString in class InputStreamResource