Module java.xml.crypto

Package javax.xml.crypto

Interface XMLCryptoContext

All Known Subinterfaces:

XMLSignContext, XMLValidateContext

All Known Implementing Classes:

DOMCryptoContext, DOMSignContext, DOMValidateContext

public interface XMLCryptoContext

Contains common context information for XML cryptographic operations.

This interface contains methods for setting and retrieving properties that affect the processing of XML signatures or XML encrypted structures.

Note that XMLCryptoContext instances can contain information and state specific to the XML cryptographic structure it is used with. The results are unpredictable if an XMLCryptoContext is used with multiple structures (for example, you should not use the same XMLValidateContext instance to validate two different XMLSignature objects).

Since:

1.6

Method Summary

Modifier and Type	Method	Description
Object	get(Object key)	Returns the value to which this context maps the specified key.
String	getBaseURI()	Returns the base URI.
String	getDefaultNamespacePrefix()	Returns the default namespace prefix.
KeySelector	getKeySelector()	Returns the key selector for finding a key.
String	getNamespacePrefix(String namespaceURI, String defaultPrefix)	Returns the namespace prefix that the specified namespace URI is associated with.
Object	getProperty(String name)	Returns the value of the specified property.
URIDereferencer	getURIDereferencer()	Returns a URIDereferencer that is used to dereference URIReferences.
Object	put(Object key, Object value)	Associates the specified value with the specified key in this context.
String	putNamespacePrefix(String namespaceURI, String prefix)	Maps the specified namespace URI to the specified prefix.
void	setBaseURI(String baseURI)	Sets the base URI.
void	setDefaultNamespacePrefix(String defaultPrefix)	Sets the default namespace prefix.
void	setKeySelector(KeySelector ks)	Sets the key selector for finding a key.
Object	setProperty(String name, Object value)	Sets the specified property.
void	setURIDereferencer(URIDereferencer dereferencer)	Sets a URIDereferencer that is used to dereference URIReferences.

Method Details

getBaseURI

String getBaseURI()

Returns the base URI.

Returns:

the base URI, or null if not specified

See Also:

• setBaseURI(String)

setBaseURI

void setBaseURI(String baseURI)

Sets the base URI.

Parameters:

baseURI - the base URI, or null to remove current value

Throws:

IllegalArgumentException - if baseURI is not RFC 2396 compliant

See Also:

• getBaseURI()

getKeySelector

KeySelector getKeySelector()

Returns the key selector for finding a key.

Returns:

the key selector, or null if not specified

See Also:

• setKeySelector(KeySelector)

setKeySelector

void setKeySelector(KeySelector ks)

Sets the key selector for finding a key.

Parameters:

ks - the key selector, or null to remove the current setting

See Also:

• getKeySelector()

getURIDereferencer

URIDereferencer getURIDereferencer()

Returns a URIDereferencer that is used to dereference URIReferences.

Returns:

the URIDereferencer, or null if not specified

See Also:

• setURIDereferencer(URIDereferencer)

setURIDereferencer

void setURIDereferencer(URIDereferencer dereferencer)

Sets a URIDereferencer that is used to dereference URIReferences. The specified URIDereferencer is used in place of an implementation's default URIDereferencer.

Parameters:

dereferencer - the URIDereferencer, or null to remove any current setting

See Also:

• getURIDereferencer()

getNamespacePrefix

String getNamespacePrefix(String namespaceURI,
 String defaultPrefix)

Returns the namespace prefix that the specified namespace URI is associated with. Returns the specified default prefix if the specified namespace URI has not been bound to a prefix. To bind a namespace URI to a prefix, call the putNamespacePrefix method.

Parameters:

namespaceURI - a namespace URI

defaultPrefix - the prefix to be returned in the event that the the specified namespace URI has not been bound to a prefix.

Returns:

the prefix that is associated with the specified namespace URI, or defaultPrefix if the URI is not registered. If the namespace URI is registered but has no prefix, an empty string ("") is returned.

Throws:

NullPointerException - if namespaceURI is null

See Also:

• putNamespacePrefix(String, String)

putNamespacePrefix

String putNamespacePrefix(String namespaceURI,
 String prefix)

Maps the specified namespace URI to the specified prefix. If there is already a prefix associated with the specified namespace URI, the old prefix is replaced by the specified prefix.

Parameters:

namespaceURI - a namespace URI

prefix - a namespace prefix (or null to remove any existing mapping). Specifying the empty string ("") binds no prefix to the namespace URI.

Returns:

the previous prefix associated with the specified namespace URI, or null if there was none

Throws:

NullPointerException - if namespaceURI is null

See Also:

• getNamespacePrefix(String, String)

getDefaultNamespacePrefix

String getDefaultNamespacePrefix()

Returns the default namespace prefix. The default namespace prefix is the prefix for all namespace URIs not explicitly set by the putNamespacePrefix method.

Returns:

the default namespace prefix, or null if none has been set.

See Also:

• setDefaultNamespacePrefix(String)

setDefaultNamespacePrefix

void setDefaultNamespacePrefix(String defaultPrefix)

Sets the default namespace prefix. This sets the namespace prefix for all namespace URIs not explicitly set by the putNamespacePrefix method.

Parameters:

defaultPrefix - the default namespace prefix, or null to remove the current setting. Specify the empty string ("") to bind no prefix.

See Also:

• getDefaultNamespacePrefix()

setProperty

Object setProperty(String name,
 Object value)

Sets the specified property.

Parameters:

name - the name of the property

value - the value of the property to be set

Returns:

the previous value of the specified property, or null if it did not have a value

Throws:

NullPointerException - if name is null

See Also:

• getProperty(String)

getProperty

Object getProperty(String name)

Returns the value of the specified property.

Parameters:

name - the name of the property

Returns:

the current value of the specified property, or null if it does not have a value

Throws:

NullPointerException - if name is null

See Also:

• setProperty(String, Object)

get

Object get(Object key)

Returns the value to which this context maps the specified key.

More formally, if this context contains a mapping from a key k to a value v such that (key==null ? k==null : key.equals(k)), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)

This method is useful for retrieving arbitrary information that is specific to the cryptographic operation that this context is used for.

Parameters:

key - the key whose associated value is to be returned

Returns:

the value to which this context maps the specified key, or null if there is no mapping for the key

See Also:

• put(Object, Object)

put

Object put(Object key,
 Object value)

Associates the specified value with the specified key in this context. If the context previously contained a mapping for this key, the old value is replaced by the specified value.

This method is useful for storing arbitrary information that is specific to the cryptographic operation that this context is used for.

Parameters:

key - key with which the specified value is to be associated with

value - value to be associated with the specified key

Returns:

the previous value associated with the key, or null if there was no mapping for the key

Throws:

IllegalArgumentException - if some aspect of this key or value prevents it from being stored in this context

See Also:

• get(Object)