Package 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 role as the Factory and Proxy of implemanting class that have 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

Modifier and Type	Field	Description
protected TransformSpi	transformSpi	Field transformSpi

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

_baseURI, _constructionElement, _doc, _state, MODE_CREATE, MODE_DECRYPT, MODE_ENCRYPT, MODE_PROCESS, MODE_SIGN, MODE_UNKNOWN, MODE_VERIFY

Constructor Summary

Constructors

Constructor	Description
Transform(Document doc, String algorithmURI, NodeList contextNodes)	Constructs Transform
Transform(Element element, String BaseURI)	This constructor can only be called from the Transforms object, so it's protected.

Method Summary

Modifier and Type	Method	Description
String	getBaseLocalName()	Returns the localname of the Elements of the sub-class.
static final Transform	getInstance(Document doc, String algorithmURI)	Generates a Transform object that implements the specified Transform algorithm URI.
static final Transform	getInstance(Document doc, String algorithmURI, Element contextChild)	Generates a Transform object that implements the specified Transform algorithm URI.
static final Transform	getInstance(Document doc, String algorithmURI, NodeList contextNodes)	Generates a Transform object that implements the specified Transform algorithm URI.
final String	getURI()	Returns the URI representation of Transformation algorithm
static void	init()	Initalizes for this Transform
XMLSignatureInput	performTransform(XMLSignatureInput input)	Transforms the input, and generats XMLSignatureInput as output.
XMLSignatureInput	performTransform(XMLSignatureInput input, OutputStream os)	Transforms the input, and generats XMLSignatureInput as output.
static void	register(String algorithmURI, 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, getBaseURI, getBigIntegerFromChildElement, getBytesFromChildElement, getBytesFromTextChild, getDefaultPrefix, getDocument, getElement, getElementPlusReturns, getTextFromChildElement, getTextFromTextChild, guaranteeThatElementInCorrectSpace, length, setDefaultPrefix, setElement, setXPathNamespaceContext

Methods inherited from class java.lang.Object

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

Field Details

transformSpi

protected TransformSpi transformSpi

Field transformSpi

Constructor Details

Transform

public Transform(Document doc,
 String algorithmURI,
 NodeList contextNodes)
          throws InvalidTransformException

Constructs Transform

Parameters:

doc - the Document in which Transform will be placed

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

contextNodes - the child node list of Transform element

Throws:

InvalidTransformException

Transform

public Transform(Element element,
 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 Details

getInstance

public static final Transform getInstance(Document doc,
 String algorithmURI)
                                   throws InvalidTransformException

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

Parameters:

doc - the proxy Document

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

Returns:

Transform object

Throws:

InvalidTransformException

getInstance

public static final Transform getInstance(Document doc,
 String algorithmURI,
 Element contextChild)
                                   throws InvalidTransformException

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

Parameters:

doc - the proxy Document

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

contextChild - the child element of Transform element

Returns:

Transform object

Throws:

InvalidTransformException

getInstance

public static final Transform getInstance(Document doc,
 String algorithmURI,
 NodeList contextNodes)
                                   throws InvalidTransformException

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

Parameters:

doc - the proxy Document

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

contextNodes - the child node list of Transform element

Returns:

Transform object

Throws:

InvalidTransformException

init

public static void init()

Initalizes for this Transform

register

public static void register(String algorithmURI,
 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 final String getURI()

Returns the URI representation of Transformation algorithm

Returns:

the URI representation of Transformation algorithm

performTransform

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

Transforms the input, and generats XMLSignatureInput as output.

Parameters:

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

Returns:

the XMLSignatureInput class as the result of transformation

Throws:

CanonicalizationException

IOException

InvalidCanonicalizerException

TransformationException

performTransform

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

Transforms the input, and generats 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

IOException

InvalidCanonicalizerException

TransformationException

getBaseLocalName

public 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.