net.sf.saxon.functions
Class Component
java.lang.Object
|
+--net.sf.saxon.expr.ComputedExpression
|
+--net.sf.saxon.expr.FunctionCall
|
+--net.sf.saxon.functions.SystemFunction
|
+--net.sf.saxon.functions.Component
- All Implemented Interfaces:
- Expression, java.io.Serializable
- public class Component
- extends SystemFunction
This class supports the get_X_from_Y functions defined in XPath 2.0
- See Also:
- Serialized Form
Methods inherited from class net.sf.saxon.functions.SystemFunction |
addContextDocumentArgument, checkArguments, computeCardinality, display, getDetails, getItemType, getName, getRequiredType, main, makeSystemFunction, useContextItemAsDefault |
Methods inherited from class net.sf.saxon.expr.ComputedExpression |
computeDependencies, computeSpecialProperties, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluateAsString, getCardinality, getDependencies, getIntrinsicDependencies, getLineNumber, getSpecialProperties, iterate, markTailFunctionCalls, setLineNumber, typeError |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
YEAR
public static final int YEAR
- See Also:
- Constant Field Values
MONTH
public static final int MONTH
- See Also:
- Constant Field Values
DAY
public static final int DAY
- See Also:
- Constant Field Values
HOURS
public static final int HOURS
- See Also:
- Constant Field Values
MINUTES
public static final int MINUTES
- See Also:
- Constant Field Values
SECONDS
public static final int SECONDS
- See Also:
- Constant Field Values
TIMEZONE
public static final int TIMEZONE
- See Also:
- Constant Field Values
LOCALNAME
public static final int LOCALNAME
- See Also:
- Constant Field Values
NAMESPACE
public static final int NAMESPACE
- See Also:
- Constant Field Values
Component
public Component()
simplify
public Expression simplify()
throws XPathException
- Description copied from class:
FunctionCall
- Simplify the function call. Default method is to simplify each of the supplied arguments and
evaluate the function if all are now known.
- Specified by:
simplify
in interface Expression
- Overrides:
simplify
in class FunctionCall
- Returns:
- the simplified expression
- Throws:
XPathException
- if an error is discovered during expression
rewriting
evaluateItem
public Item evaluateItem(XPathContext context)
throws XPathException
- Evaluate the expression
- Specified by:
evaluateItem
in interface Expression
- Overrides:
evaluateItem
in class ComputedExpression
- Parameters:
context
- The context in which the expression is to be evaluated
- Returns:
- the node or atomic value that results from evaluating the
expression; or null to indicate that the result is an empty
sequence
- Throws:
XPathException
- if any dynamic error occurs evaluating the
expression