org.jaxen
Class SimpleVariableContext
java.lang.Object
org.jaxen.SimpleVariableContext
- Serializable, VariableContext
public class SimpleVariableContext
extends java.lang.Object
Simple default implementation for
VariableContext
.
This is a simple table-based key-lookup implementation
for
VariableContext
which can be programmatically
extended by setting additional variables.
Object | getVariableValue(String namespaceURI, String prefix, String localName) - An implementation should return the value of an XPath variable
based on the namespace URI and local name of the variable-reference
expression.
|
void | setVariableValue(String localName, Object value) - Set the value associated with a variable.
|
void | setVariableValue(String namespaceURI, String localName, Object value) - Set the value associated with a variable.
|
serialVersionUID
private static final long serialVersionUID
variables
private Map variables
Table of variable bindings.
SimpleVariableContext
public SimpleVariableContext()
Construct.
Create a new empty variable context.
getVariableValue
public Object getVariableValue(String namespaceURI,
String prefix,
String localName)
throws UnresolvableException
An implementation should return the value of an XPath variable
based on the namespace URI and local name of the variable-reference
expression.
It must not use the prefix parameter to select a variable,
because a prefix could be bound to any namespace; the prefix parameter
could be used in debugging output or other generated information.
The prefix may otherwise be ignored.
- getVariableValue in interface VariableContext
namespaceURI
- the namespace URI to which the prefix parameter
is bound in the XPath expression. If the variable
reference expression had no prefix, the namespace
URI is null
.prefix
- the prefix that was used in the variable reference
expression; this value is ignored and has no effectlocalName
- the local name of the variable-reference
expression. If there is no prefix, then this is
the whole name of the variable.
- the variable's value (which can be
null
)
setVariableValue
public void setVariableValue(String localName,
Object value)
Set the value associated with a variable.
This method sets a variable that is
not
associated with any particular namespace.
These variables look like
$foo
in an XPath expression.
localName
- the local name of the variablevalue
- the value to be bound to the variable
setVariableValue
public void setVariableValue(String namespaceURI,
String localName,
Object value)
Set the value associated with a variable.
This method sets a variable that is
associated with a particular namespace.
These variables appear such as
$prefix:foo
in an XPath expression. Prefix to URI resolution
is the responsibility of a
NamespaceContext
.
Variables within a
VariableContext
are
referred to purely based upon their namespace URI,
if any.
namespaceURI
- the namespace URI of the variablelocalName
- the local name of the variablevalue
- The value to be bound to the variable