com.icl.saxon.functions
Class Key
java.lang.Object
|
+--com.icl.saxon.expr.Expression
|
+--com.icl.saxon.expr.Function
|
+--com.icl.saxon.functions.Key
- public class Key
- extends Function
Constructor Summary |
Key()
|
Methods inherited from class com.icl.saxon.expr.Expression |
containsReferences, enumerate, evaluateAsBoolean, evaluateAsNodeSet, evaluateAsNumber, evaluateAsString, getStaticContext, make, outputStringValue, setStaticContext, usesCurrent |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Key
public Key()
getName
public java.lang.String getName()
- Description copied from class:
Function
- Get the name of the function.
This method must be implemented in all subclasses.
- Overrides:
getName
in class Function
- Following copied from class:
com.icl.saxon.expr.Function
- Returns:
- the name of the function, as used in XSL expressions, but excluding
its namespace prefix
getDataType
public int getDataType()
- Determine the data type of the expression
- Overrides:
getDataType
in class Expression
- Returns:
- Value.NODESET
simplify
public Expression simplify()
throws org.xml.sax.SAXException
- Simplify and validate
- Overrides:
simplify
in class Expression
- Following copied from class:
com.icl.saxon.expr.Expression
- Returns:
- the simplified expression
evaluate
public Value evaluate(Context context)
throws org.xml.sax.SAXException
- Evaluate the expression
- Overrides:
evaluate
in class Expression
- Following copied from class:
com.icl.saxon.expr.Expression
- Parameters:
context
- The context in which the expression is to be evaluated- Returns:
- the value of the expression, evaluated in the current context
enumerate
public NodeEnumeration enumerate(Context context)
throws org.xml.sax.SAXException
- Enumerate the expression
getDependencies
public int getDependencies()
- Determine which aspects of the context the expression depends on. The result is
a bitwise-or'ed value composed from constants such as Context.VARIABLES and
Context.CURRENT_NODE
- Overrides:
getDependencies
in class Expression
reduce
public Expression reduce(int dep,
Context context)
throws org.xml.sax.SAXException
- Remove specified dependencies.
- Overrides:
reduce
in class Expression
- Following copied from class:
com.icl.saxon.expr.Expression
- Parameters:
dependencies
- The dependencies to be removed, e.g. Context.VARIABLEScontext
- The context to be used for the partial evaluation- Returns:
- a new expression (or Value) that does not have any of the specified dependencies