Package com.icl.saxon.functions
Class SubstringBefore
java.lang.Object
com.icl.saxon.expr.Expression
com.icl.saxon.expr.Function
com.icl.saxon.functions.SubstringBefore
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Field Summary
Fields inherited from class com.icl.saxon.expr.Expression
staticContext
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionEvaluate in a general contextevaluateAsString
(Context context) Evaluate the function in a string contextint
Determine the data type of the expressionint
Get dependenciesgetName()
Get the name of the function.Remove dependenciessimplify()
Simplify and validateMethods inherited from class com.icl.saxon.expr.Function
addArgument, checkArgumentCount, display, getNumberOfArguments
Methods inherited from class com.icl.saxon.expr.Expression
containsReferences, enumerate, evaluateAsBoolean, evaluateAsNodeSet, evaluateAsNumber, getStaticContext, indent, isContextDocumentNodeSet, make, outputStringValue, setStaticContext, usesCurrent
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Constructor Details
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SubstringBefore
public SubstringBefore()
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Method Details
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getName
Description copied from class:Function
Get the name of the function. This method must be implemented in all subclasses. -
getDataType
public int getDataType()Determine the data type of the expression- Specified by:
getDataType
in classExpression
- Returns:
- Value.STRING
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simplify
Simplify and validate- Overrides:
simplify
in classExpression
- Returns:
- the simplified expression
- Throws:
XPathException
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evaluateAsString
Evaluate the function in a string context- Overrides:
evaluateAsString
in classExpression
- Parameters:
context
- The context in which the expression is to be evaluated- Returns:
- the value of the expression, evaluated in the current context
- Throws:
XPathException
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evaluate
Evaluate in a general context- Specified by:
evaluate
in classExpression
- Parameters:
c
- The context in which the expression is to be evaluated- Returns:
- the value of the expression, evaluated in the current context
- Throws:
XPathException
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getDependencies
public int getDependencies()Get dependencies- Specified by:
getDependencies
in classExpression
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reduce
Remove dependencies- Specified by:
reduce
in classExpression
- Parameters:
dep
- The dependencies to be removed, e.g. Context.VARIABLESc
- The context to be used for the partial evaluation- Returns:
- a new expression (or Value) that does not have any of the specified dependencies
- Throws:
XPathException
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