iaik.ixsil.algorithms

Class TransformImplBase64Decode

java.lang.Object

iaik.ixsil.algorithms.Algorithm

iaik.ixsil.algorithms.Transform

iaik.ixsil.algorithms.TransformImplBase64Decode

public class TransformImplBase64Decode
extends Transform

Provides an transform implementation of the Base64 decoding algorithm, as it has been specified in XML Signature, Base64 Transform.

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.lang.String	DEFAULT_ALGORITHM_URI_ The default algorithm URI for this algorithm implementation.

Fields inherited from class iaik.ixsil.algorithms.Transform

inputNodeSet_, inputOctetStream_, inputURI_

Fields inherited from class iaik.ixsil.algorithms.Algorithm

uri_

Constructor Summary

Constructors

Constructor and Description
TransformImplBase64Decode() Standard constructor.

Method Summary

Methods

Modifier and Type	Method and Description
org.w3c.dom.Element	toElement(org.w3c.dom.Document signatureDOMDoc) Returns the DOM element representation of the transform.
java.lang.Object	transform() Computes the base64 decoding of the input which has been specified for this transform.

Methods inherited from class iaik.ixsil.algorithms.Transform

distributeNSDeclarations, setInput, setInput, skipStylesheetElem, withdrawDistributedNSDeclarations

Methods inherited from class iaik.ixsil.algorithms.Algorithm

getURI, setParameters, setURI

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_ALGORITHM_URI_

protected static final java.lang.String DEFAULT_ALGORITHM_URI_

The default algorithm URI for this algorithm implementation.

See Also:

Constant Field Values

Constructor Detail

TransformImplBase64Decode

public TransformImplBase64Decode()

Standard constructor. Sets the default value for the algorithm URI to http://www.w3.org/2000/09/xmldsig#base64.

Method Detail

toElement

public org.w3c.dom.Element toElement(org.w3c.dom.Document signatureDOMDoc)
                              throws AlgorithmException

Returns the DOM element representation of the transform.

Specified by:

toElement in class Algorithm

Parameters:

signatureDOMDoc - The DOM document which should be used to create necessary DOM nodes.

Returns:

the DOM element representation of the transform.

Throws:

AlgorithmException - if no identifying URI has been specified for this transform.

transform

public java.lang.Object transform()
                           throws AlgorithmException

Computes the base64 decoding of the input which has been specified for this transform.

If the input has been specified as XPath node set with method Transform.setInput(NodeList, URI), the node set is converted into an octet stream first, as described in XML Signature, Base64 Transform.

Alternatively, the input can be specified directly as octet stream with method Transform.setInput(InputStream, URI).

In both cases, the octet stream will be base64 decoded finally.

Specified by:

transform in class Transform

Returns:

the base64 decoding of the octet stream representation of the specified input as an octet stream.

Throws:

AlgorithmException - if no input has been specified, or if converting the XPath node set input into its octet stream representation fails, or if computing the base64 decoding fails for any reason.