Returns the value to which this context maps the specified 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.
Returns: the value to which this context maps the specified key, or null if there is no mapping for the key
Parameters:
- key - the key whose associated value is to be returned
See Also: XMLCryptoContext.put(Object, Object),

  Returns the base URI.

  Returns the base URI.
Returns: the base URI, or null if not specified
See Also: XMLCryptoContext.setBaseURI(String),

  Returns the default namespace prefix.

  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: XMLCryptoContext.setDefaultNamespacePrefix(String),

  Returns the key selector for finding a key.

  Returns the key selector for finding a key.
Returns: the key selector, or null if not specified
See Also: XMLCryptoContext.setKeySelector(KeySelector),

  Returns the namespace prefix that the specified namespace URI is associated with.

  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.
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.
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.
Throws:
- NullPointerException - if namespaceURI is null
See Also: XMLCryptoContext.putNamespacePrefix(String, String),

  Returns the value of the specified property.

  Returns the value of the specified property.
Returns: the current value of the specified property, or null if it does not have a value
Parameters:
- name - the name of the property
Throws:
- NullPointerException - if name is null
See Also: XMLCryptoContext.setProperty(String, Object),

  Returns a URIDereferencer that is used to dereference URIReferences.

  Returns a URIDereferencer that is used to dereference
URIReferences.
Returns: the URIDereferencer, or null if not specified
See Also: XMLCryptoContext.setURIDereferencer(URIDereferencer),

  Associates the specified value with the specified key in this context.

  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.
Returns: the previous value associated with the key, or null if there was no mapping for the key
Parameters:
- key - key with which the specified value is to be associated with
- value - value to be associated with the specified key
Throws:
- IllegalArgumentException - if some aspect of this key or value prevents it from being stored in this context
See Also: XMLCryptoContext.get(Object),

  Maps the specified namespace URI to the specified 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.
Returns: the previous prefix associated with the specified namespace URI, or null if there was none
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.
Throws:
- NullPointerException - if namespaceURI is null
See Also: XMLCryptoContext.getNamespacePrefix(String, String),

  Sets the base URI.

  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: XMLCryptoContext.getBaseURI(),

  Sets the default namespace prefix.

  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: XMLCryptoContext.getDefaultNamespacePrefix(),

  Sets the key selector for finding a key.

  Sets the key selector for finding a key.
Parameters:
- ks - the key selector, or null to remove the current setting
See Also: XMLCryptoContext.getKeySelector(),

  Sets the specified property.

  Sets the specified property.
Returns: the previous value of the specified property, or null if it did not have a value
Parameters:
- name - the name of the property
- value - the value of the property to be set
Throws:
- NullPointerException - if name is null
See Also: XMLCryptoContext.getProperty(String),

  Sets a URIDereferencer that is used to dereference URIReferences.

  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: XMLCryptoContext.getURIDereferencer(),