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 {@link javax.xml.crypto.dsig.XMLValidateContext} instance to validate two different {@link javax.xml.crypto.dsig.XMLSignature} objects).

get

public 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

getBaseURI

public String getBaseURI()

Returns the base URI.

Returns:

the base URI, or null if not specified

getDefaultNamespacePrefix

public String getDefaultNamespacePrefix()

Returns the default namespace prefix. The default namespace prefix is the prefix for all namespace URIs not explicitly set by the {@link #putNamespacePrefix putNamespacePrefix} method.

Returns:

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

getKeySelector

public KeySelector getKeySelector()

Returns the key selector for finding a key.

Returns:

the key selector, or null if not specified

getNamespacePrefix

public 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 {@link #putNamespacePrefix 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.

getProperty

public 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

getURIDereferencer

public URIDereferencer getURIDereferencer()

Returns a URIDereferencer that is used to dereference {@link URIReference}s.

Returns:

the URIDereferencer, or null if not specified

put

public 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

putNamespacePrefix

public 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

setBaseURI

public void setBaseURI(String baseURI)

Sets the base URI.

Parameters:

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

setDefaultNamespacePrefix

public void setDefaultNamespacePrefix(String defaultPrefix)

Sets the default namespace prefix. This sets the namespace prefix for all namespace URIs not explicitly set by the {@link #putNamespacePrefix putNamespacePrefix} method.

Parameters:

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

setKeySelector

public void setKeySelector(KeySelector ks)

Sets the key selector for finding a key.

Parameters:

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

setProperty

public 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

setURIDereferencer

public void setURIDereferencer(URIDereferencer dereferencer)

Sets a URIDereferencer that is used to dereference {@link URIReference}s. The specified URIDereferencer is used in place of an implementation's default URIDereferencer.

Parameters:

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