Package org.apache.commons.jxpath.ri.compiler

Class 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) $

    • Field Detail

      • ZERO

        private static final java.lang.Double ZERO

      • functionCode

        private int functionCode

    • Constructor Detail

      • CoreFunction

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

    • Method Detail

      • getFunctionCode

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

      • getFunctionName

        protected java.lang.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 java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • compute

        public java.lang.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 java.lang.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 java.lang.Object functionLast​(EvalContext context)
        last() implementation.
        Parameters:
        context - evaluation context
        Returns:
        Number

      • functionPosition

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

      • functionCount

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

      • functionLang

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

      • functionID

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

      • functionKey

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

      • functionNamespaceURI

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

      • functionLocalName

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

      • functionName

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

      • functionString

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

      • functionConcat

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

      • functionStartsWith

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

      • functionContains

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

      • functionSubstringBefore

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

      • functionSubstringAfter

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

      • functionSubstring

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

      • functionStringLength

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

      • functionNormalizeSpace

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

      • functionTranslate

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

      • functionBoolean

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

      • functionNot

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

      • functionTrue

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

      • functionFalse

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

      • functionNull

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

      • functionNumber

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

      • functionSum

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

      • functionFloor

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

      • functionCeiling

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

      • functionRound

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

      • functionFormatNumber

        private java.lang.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