Class CoreFunction

java.lang.Object
org.apache.commons.jxpath.ri.compiler.Expression
org.apache.commons.jxpath.ri.compiler.Operation
org.apache.commons.jxpath.ri.compiler.CoreFunction
public class CoreFunction extends Operation
An element of the compile tree representing one of built-in functions like "position()" or "number()".
Version:
$Revision: 668329 $ $Date: 2008-06-16 16:59:48 -0500 (Mon, 16 Jun 2008) $
Author:
Dmitri Plotnikov

  • Field Details

    • ZERO

      private static final Double ZERO

    • functionCode

      private int functionCode

  • Constructor Details

    • CoreFunction

      public CoreFunction(int functionCode, Expression[] args)
      Create a new CoreFunction.
      Parameters:
      functionCode - int function code
      args - argument Expressions

  • Method Details

    • getFunctionCode

      public int getFunctionCode()
      Get the function code.
      Returns:
      int function code

    • getFunctionName

      protected String getFunctionName()
      Get the name of this function.
      Returns:
      String function name

    • getArg1

      public Expression getArg1()
      Convenience method to return the first argument.
      Returns:
      Expression

    • getArg2

      public Expression getArg2()
      Convenience method to return the second argument.
      Returns:
      Expression

    • getArg3

      public Expression getArg3()
      Convenience method to return the third argument.
      Returns:
      Expression

    • getArgumentCount

      public int getArgumentCount()
      Return the number of argument Expressions.
      Returns:
      int count

    • computeContextDependent

      public boolean computeContextDependent()
      Returns true if any argument is context dependent or if the function is last(), position(), boolean(), local-name(), name(), string(), lang(), number().
      Overrides:
      computeContextDependent in class Operation
      Returns:
      boolean

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • compute

      public Object compute(EvalContext context)
      Description copied from class: Expression
      Evaluates the expression. If the result is a node set, returns the first element of the node set.
      Specified by:
      compute in class Expression
      Parameters:
      context - evaluation context
      Returns:
      Object

    • computeValue

      public Object computeValue(EvalContext context)
      Description copied from class: Expression
      Evaluates the expression. If the result is a node set, returns the first element of the node set.
      Specified by:
      computeValue in class Expression
      Parameters:
      context - evaluation context
      Returns:
      Object

    • functionLast

      protected Object functionLast(EvalContext context)
      last() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Number

    • functionPosition

      protected Object functionPosition(EvalContext context)
      position() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Number

    • functionCount

      protected Object functionCount(EvalContext context)
      count() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Number

    • functionLang

      protected Object functionLang(EvalContext context)
      lang() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Boolean

    • functionID

      protected Object functionID(EvalContext context)
      id() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Pointer

    • functionKey

      protected Object functionKey(EvalContext context)
      key() implementation.
      Parameters:
      context - evaluation context
      Returns:
      various Object

    • functionNamespaceURI

      protected Object functionNamespaceURI(EvalContext context)
      namespace-uri() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionLocalName

      protected Object functionLocalName(EvalContext context)
      local-name() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionName

      protected Object functionName(EvalContext context)
      name() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionString

      protected Object functionString(EvalContext context)
      string() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionConcat

      protected Object functionConcat(EvalContext context)
      concat() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionStartsWith

      protected Object functionStartsWith(EvalContext context)
      starts-with() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Boolean

    • functionContains

      protected Object functionContains(EvalContext context)
      contains() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Boolean

    • functionSubstringBefore

      protected Object functionSubstringBefore(EvalContext context)
      substring-before() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionSubstringAfter

      protected Object functionSubstringAfter(EvalContext context)
      substring-after() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionSubstring

      protected Object functionSubstring(EvalContext context)
      substring() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionStringLength

      protected Object functionStringLength(EvalContext context)
      string-length() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Number

    • functionNormalizeSpace

      protected Object functionNormalizeSpace(EvalContext context)
      normalize-space() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionTranslate

      protected Object functionTranslate(EvalContext context)
      translate() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • functionBoolean

      protected Object functionBoolean(EvalContext context)
      boolean() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Boolean

    • functionNot

      protected Object functionNot(EvalContext context)
      not() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Boolean

    • functionTrue

      protected Object functionTrue(EvalContext context)
      true() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Boolean.TRUE

    • functionFalse

      protected Object functionFalse(EvalContext context)
      false() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Boolean.FALSE

    • functionNull

      protected Object functionNull(EvalContext context)
      null() implementation.
      Parameters:
      context - evaluation context
      Returns:
      null

    • functionNumber

      protected Object functionNumber(EvalContext context)
      number() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Number

    • functionSum

      protected Object functionSum(EvalContext context)
      sum() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Number

    • functionFloor

      protected Object functionFloor(EvalContext context)
      floor() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Number

    • functionCeiling

      protected Object functionCeiling(EvalContext context)
      ceiling() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Number

    • functionRound

      protected Object functionRound(EvalContext context)
      round() implementation.
      Parameters:
      context - evaluation context
      Returns:
      Number

    • functionFormatNumber

      private Object functionFormatNumber(EvalContext context)
      format-number() implementation.
      Parameters:
      context - evaluation context
      Returns:
      String

    • assertArgCount

      private void assertArgCount(int count)
      Assert count args.
      Parameters:
      count - int

    • assertArgRange

      private void assertArgRange(int min, int max)
      Assert at least min/at most max args.
      Parameters:
      min - int
      max - int