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java.lang.Object | +--org.apache.xml.security.transforms.TransformSpi | +--org.apache.xml.security.transforms.implementations.TransformBase64Decode
Implements the http://www.w3.org/2000/09/xmldsig#base64
decoding
transform.
The normative specification for base64 decoding transforms is [MIME]. The base64 Transform element has no content. The input is decoded by the algorithms. This transform is useful if an application needs to sign the raw data associated with the encoded content of an element.
This transform requires an octet stream for input. If an XPath node-set (or sufficiently functional alternative) is given as input, then it is converted to an octet stream by performing operations logically equivalent to 1) applying an XPath transform with expression self::text(), then 2) taking the string-value of the node-set. Thus, if an XML element is identified by a barename XPointer in the Reference URI, and its content consists solely of base64 encoded character data, then this transform automatically strips away the start and end tags of the identified element and any of its descendant elements as well as any descendant comments and processing instructions. The output of this transform is an octet stream.
Base64
Field Summary | |
static java.lang.String |
implementedTransformURI
Field implementedTransformURI |
Fields inherited from class org.apache.xml.security.transforms.TransformSpi |
_transformObject |
Constructor Summary | |
TransformBase64Decode()
|
Method Summary | |
protected java.lang.String |
engineGetURI()
Method engineGetURI |
protected XMLSignatureInput |
enginePerformTransform(XMLSignatureInput input)
Method enginePerformTransform |
boolean |
returnsNodeSet()
Tests whether Transform implemenation class will generate Node Set as output of result of Transformation |
boolean |
returnsOctetStream()
Tests whether Transform implemenation class will generate Octect Stream as output of result of Transformation |
boolean |
wantsNodeSet()
Tests whether Transform implemenation class is need Octect Stream as input of Transformation |
boolean |
wantsOctetStream()
Tests whether Transform implemenation class is need Octect Stream as input of Transformation |
Methods inherited from class org.apache.xml.security.transforms.TransformSpi |
setTransform |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
public static final java.lang.String implementedTransformURI
Constructor Detail |
public TransformBase64Decode()
Method Detail |
protected java.lang.String engineGetURI()
engineGetURI
in class TransformSpi
public boolean wantsOctetStream()
TransformSpi
wantsOctetStream
in class TransformSpi
public boolean wantsNodeSet()
TransformSpi
wantsNodeSet
in class TransformSpi
public boolean returnsOctetStream()
TransformSpi
returnsOctetStream
in class TransformSpi
public boolean returnsNodeSet()
TransformSpi
returnsNodeSet
in class TransformSpi
protected XMLSignatureInput enginePerformTransform(XMLSignatureInput input) throws java.io.IOException, CanonicalizationException, TransformationException, InvalidCanonicalizerException
enginePerformTransform
in class TransformSpi
input
-
CanonicalizationException
java.io.IOException
InvalidCanonicalizerException
TransformationException
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