All Superinterfaces:: URIReference, XMLStructure

public interface Reference
extends URIReference, XMLStructure

A representation of the Reference element as defined in the W3C Recommendation for XML-Signature Syntax and Processing. The XML schema is defined as:

 <element name="Reference" type="ds:ReferenceType"/>
 <complexType name="ReferenceType">
   <sequence>
     <element ref="ds:Transforms" minOccurs="0"/>
     <element ref="ds:DigestMethod"/>
     <element ref="ds:DigestValue"/>
   </sequence>
   <attribute name="Id" type="ID" use="optional"/>
   <attribute name="URI" type="anyURI" use="optional"/>
   <attribute name="Type" type="anyURI" use="optional"/>
 </complexType>

 <element name="DigestValue" type="ds:DigestValueType"/>
 <simpleType name="DigestValueType">
   <restriction base="base64Binary"/>
 </simpleType>

A Reference instance may be created by invoking one of the newReference methods of the XMLSignatureFactory class; for example:

   XMLSignatureFactory factory = XMLSignatureFactory.getInstance("DOM");
   Reference ref = factory.newReference
     ("http://www.ietf.org/rfc/rfc3275.txt",
      factory.newDigestMethod(DigestMethod.SHA1, null));

Since:: 1.6
See Also:: XMLSignatureFactory.newReference(String, DigestMethod), XMLSignatureFactory.newReference(String, DigestMethod, List, String, String)

Method Summary

Methods
Modifier and Type	Method and Description
`byte[]`	`getCalculatedDigestValue()` Returns the calculated digest value of this `Reference` after a validation operation.
`Data`	`getDereferencedData()` Returns the dereferenced data, if reference caching is enabled.
`InputStream`	`getDigestInputStream()` Returns the pre-digested input stream, if reference caching is enabled.
`DigestMethod`	`getDigestMethod()` Returns the digest method of this `Reference`.
`byte[]`	`getDigestValue()` Returns the digest value of this `Reference`.
`String`	`getId()` Returns the optional `Id` attribute of this `Reference`, which permits this reference to be referenced from elsewhere.
`List`	`getTransforms()` Returns an `unmodifiable list` of `Transform`s that are contained in this `Reference`.
`boolean`	`validate(XMLValidateContext validateContext)` Validates this reference.

Methods inherited from interface javax.xml.crypto.URIReference
getType, getURI

Methods inherited from interface javax.xml.crypto.XMLStructure
isFeatureSupported

- Method Detail
  - getTransforms
```
List getTransforms()
```
    Returns an unmodifiable list of Transforms that are contained in this Reference.
    
    Returns:
    an unmodifiable list of Transforms (may be empty but never null)
  - getDigestMethod
```
DigestMethod getDigestMethod()
```
    Returns the digest method of this Reference.
    
    Returns:
    the digest method
  - getId
```
String getId()
```
    Returns the optional Id attribute of this Reference, which permits this reference to be referenced from elsewhere.
    
    Returns:
    the Id attribute (may be null if not specified)
  - getDigestValue
```
byte[] getDigestValue()
```
    Returns the digest value of this Reference.
    
    Returns:
    the raw digest value, or null if this reference has not been digested yet. Each invocation of this method returns a new clone to protect against subsequent modification.
  - getCalculatedDigestValue
```
byte[] getCalculatedDigestValue()
```
    Returns the calculated digest value of this Reference after a validation operation. This method is useful for debugging if the reference fails to validate.
    
    Returns:
    the calculated digest value, or null if this reference has not been validated yet. Each invocation of this method returns a new clone to protect against subsequent modification.
  - validate
```
boolean validate(XMLValidateContext validateContext)
                 throws XMLSignatureException
```
    Validates this reference. This method verifies the digest of this reference.
    This method only validates the reference the first time it is invoked. On subsequent invocations, it returns a cached result.
    
    Parameters:
    validateContext - the validating context
    
    Returns:
    true if this reference was validated successfully; false otherwise
    
    Throws:
    
    NullPointerException - if validateContext is null
    
    XMLSignatureException - if an unexpected exception occurs while validating the reference
  - getDereferencedData
```
Data getDereferencedData()
```
    Returns the dereferenced data, if reference caching is enabled. This is the result of dereferencing the URI of this reference during a validation or generation operation.
    
    Returns:
    the dereferenced data, or null if reference caching is not enabled or this reference has not been generated or validated
  - getDigestInputStream
```
InputStream getDigestInputStream()
```
    Returns the pre-digested input stream, if reference caching is enabled. This is the input to the digest operation during a validation or signing operation.
    
    Returns:
    an input stream containing the pre-digested input, or null if reference caching is not enabled or this reference has not been generated or validated

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Document créé le 11/06/2005, dernière modification le 04/03/2020
Source du document imprimé : https://www.gaudry.be/java-api-rf-javax/xml/crypto/dsig/reference.html

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Table des matières Haut

Interface Reference

Method Summary

Methods inherited from interface javax.xml.crypto.URIReference

Methods inherited from interface javax.xml.crypto.XMLStructure

Method Detail

getTransforms

getDigestMethod

getId

getDigestValue

getCalculatedDigestValue

validate

getDereferencedData

getDigestInputStream

Références