org.apache.xml.security.transforms
Class Transform

java.lang.Object
  org.apache.xml.security.utils.ElementProxy
      org.apache.xml.security.utils.SignatureElementProxy
          org.apache.xml.security.transforms.Transform

public final class Transform
extends SignatureElementProxy

Implements the behaviour of the ds:Transform element. This Transform(Factory) class acts as the Factory and Proxy of the implementing class that supports the functionality of a Transform algorithm. Implements the Factory and Proxy pattern for ds:Transform algorithms.

Author:

Christian Geuer-Pollmann

See Also:

Transforms, TransformSpi

Field Summary

Fields inherited from class org.apache.xml.security.utils.ElementProxy

_baseURI, _constructionElement, _doc

Constructor Summary

Transform(org.w3c.dom.Document doc, java.lang.String algorithmURI, org.w3c.dom.NodeList contextNodes)
Constructs Transform

Transform(org.w3c.dom.Element element, java.lang.String BaseURI)
This constructor can only be called from the Transforms object, so it's protected.

Method Summary

java.lang.String	getBaseLocalName() Returns the localname of the Elements of the sub-class.
static Transform	getInstance(org.w3c.dom.Document doc, java.lang.String algorithmURI) Generates a Transform object that implements the specified Transform algorithm URI.
static Transform	getInstance(org.w3c.dom.Document doc, java.lang.String algorithmURI, org.w3c.dom.Element contextChild) Generates a Transform object that implements the specified Transform algorithm URI.
static Transform	getInstance(org.w3c.dom.Document doc, java.lang.String algorithmURI, org.w3c.dom.NodeList contextNodes) Generates a Transform object that implements the specified Transform algorithm URI.
java.lang.String	getURI() Returns the URI representation of Transformation algorithm
static void	init() Initalizes for this Transform.
XMLSignatureInput	performTransform(XMLSignatureInput input) Transforms the input, and generates XMLSignatureInput as output.
XMLSignatureInput	performTransform(XMLSignatureInput input, java.io.OutputStream os) Transforms the input, and generates XMLSignatureInput as output.
static void	register(java.lang.String algorithmURI, java.lang.String implementingClass) Registers implementing class of the Transform algorithm with algorithmURI

Methods inherited from class org.apache.xml.security.utils.SignatureElementProxy

getBaseNamespace

Methods inherited from class org.apache.xml.security.utils.ElementProxy

addBase64Element, addBase64Text, addBigIntegerElement, addText, addTextElement, createElementForFamily, createElementForFamilyLocal, getBaseURI, getBigIntegerFromChildElement, getBytesFromChildElement, getBytesFromTextChild, getDefaultPrefix, getDefaultPrefixBindings, getDocument, getElement, getElementPlusReturns, getTextFromChildElement, getTextFromTextChild, length, setDefaultPrefix, setElement, setXPathNamespaceContext

Methods inherited from class java.lang.Object

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

Constructor Detail

Transform

public Transform(org.w3c.dom.Document doc,
                 java.lang.String algorithmURI,
                 org.w3c.dom.NodeList contextNodes)
          throws InvalidTransformException

Constructs Transform

Parameters:

doc - the Document in which Transform will be placed

algorithmURI - URI representation of Transform algorithm which will be specified as parameter of getInstance(Document, String), when generated.

contextNodes - the child node list of Transform element

Throws:

InvalidTransformException

Transform

public Transform(org.w3c.dom.Element element,
                 java.lang.String BaseURI)
          throws InvalidTransformException,
                 TransformationException,
                 XMLSecurityException

This constructor can only be called from the Transforms object, so it's protected.

Parameters:

element - ds:Transform element

BaseURI - the URI of the resource where the XML instance was stored

Throws:

InvalidTransformException

TransformationException

XMLSecurityException

Method Detail

getInstance

public static Transform getInstance(org.w3c.dom.Document doc,
                                    java.lang.String algorithmURI)
                             throws InvalidTransformException

Generates a Transform object that implements the specified Transform algorithm URI.

Parameters:

algorithmURI - Transform algorithm URI representation, such as specified in Transform algorithm

doc - the proxy Document

Returns:

Transform object

Throws:

InvalidTransformException

getInstance

public static Transform getInstance(org.w3c.dom.Document doc,
                                    java.lang.String algorithmURI,
                                    org.w3c.dom.Element contextChild)
                             throws InvalidTransformException

Generates a Transform object that implements the specified Transform algorithm URI.

Parameters:

algorithmURI - Transform algorithm URI representation, such as specified in Transform algorithm

contextChild - the child element of Transform element

doc - the proxy Document

Returns:

Transform object

Throws:

InvalidTransformException

getInstance

public static Transform getInstance(org.w3c.dom.Document doc,
                                    java.lang.String algorithmURI,
                                    org.w3c.dom.NodeList contextNodes)
                             throws InvalidTransformException

Generates a Transform object that implements the specified Transform algorithm URI.

Parameters:

algorithmURI - Transform algorithm URI form, such as specified in Transform algorithm

contextNodes - the child node list of Transform element

doc - the proxy Document

Returns:

Transform object

Throws:

InvalidTransformException

init

public static void init()

Initalizes for this Transform.

register

public static void register(java.lang.String algorithmURI,
                            java.lang.String implementingClass)
                     throws AlgorithmAlreadyRegisteredException

Registers implementing class of the Transform algorithm with algorithmURI

Parameters:

algorithmURI - algorithmURI URI representation of Transform algorithm will be specified as parameter of getInstance(Document, String), when generate.

implementingClass - implementingClass the implementing class of TransformSpi

Throws:

AlgorithmAlreadyRegisteredException - if specified algorithmURI is already registered

getURI

public java.lang.String getURI()

Returns the URI representation of Transformation algorithm

Returns:

the URI representation of Transformation algorithm

performTransform

public XMLSignatureInput performTransform(XMLSignatureInput input)
                                   throws java.io.IOException,
                                          CanonicalizationException,
                                          InvalidCanonicalizerException,
                                          TransformationException

Transforms the input, and generates XMLSignatureInput as output.

Parameters:

input - input XMLSignatureInput which can supplied Octet Stream and NodeSet as Input of Transformation

Returns:

the XMLSignatureInput class as the result of transformation

Throws:

CanonicalizationException

java.io.IOException

InvalidCanonicalizerException

TransformationException

performTransform

public XMLSignatureInput performTransform(XMLSignatureInput input,
                                          java.io.OutputStream os)
                                   throws java.io.IOException,
                                          CanonicalizationException,
                                          InvalidCanonicalizerException,
                                          TransformationException

Transforms the input, and generates XMLSignatureInput as output.

Parameters:

input - input XMLSignatureInput which can supplied Octect Stream and NodeSet as Input of Transformation

os - where to output the result of the last transformation

Returns:

the XMLSignatureInput class as the result of transformation

Throws:

CanonicalizationException

java.io.IOException

InvalidCanonicalizerException

TransformationException

getBaseLocalName

public java.lang.String getBaseLocalName()

Description copied from class: ElementProxy

Returns the localname of the Elements of the sub-class.

Specified by:

getBaseLocalName in class ElementProxy

Returns:

the localname of the Elements of the sub-class.