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## weblogic.apache.xpath.functions
Class FunctionOneArg

    java.lang.Object
      |
      +--weblogic.apache.xpath.Expression
            |
            +--weblogic.apache.xpath.functions.Function
                  |
                  +--weblogic.apache.xpath.functions.FunctionOneArg

Direct Known Subclasses:
  FuncBoolean, FuncCeiling, FuncCount, FuncExtElementAvailable, FuncExtFunctionAvailable, FuncFloor, FuncId, FuncLang, FuncNot, FuncRound, FuncSum, FuncSystemProperty, Function2Args, FunctionDef1Arg, FuncUnparsedEntityURI

public class FunctionOneArg
extends Function

Base class for functions that accept one argument.

This class is based on an implementation from the Apache XML Project. In future releases the XML parser, XSLT processor, and associated classes will likely be updated to be based on a later version of the Apache implementations. Since Apache does not guarantee backwards compatibility between versions of their software, we cannot guarantee backwards compatibility of any of the classes contained in the weblogic.apache package or sub-packages.

See Also:
  Serialized Form

Fields inherited from class weblogic.apache.xpath.Expression
`m_slocator`

Constructor Summary
`FunctionOneArg()`

Method Summary
`boolean` | `canTraverseOutsideSubtree()` Tell if this expression or it's subexpressions can traverse outside the current subtree.
`void` | `checkNumberArgs(int argNum)` Check that the number of arguments passed to this function is correct.
`void` | `fixupVariables(java.util.Vector vars, int globalsSize)` This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.
`Expression` | `getArg0()` Return the first argument passed to the function (at index 0).
`void` | `setArg(Expression arg, int argNum)` Set an argument expression for a function.

Methods inherited from class weblogic.apache.xpath.functions.Function
`execute`

Methods inherited from class weblogic.apache.xpath.Expression
`asIterator, asNode, assertion, bool, error, execute, execute, executeCharsToContentHandler, isNodesetExpr, isStableNumber, num, setSourceLocator, warn, xstr`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### FunctionOneArg

    public FunctionOneArg()

Method Detail

### getArg0

    public Expression getArg0()

  Return the first argument passed to the function (at index 0).

  Returns:
    An expression that represents the first argument passed to the function.

### setArg

    public void setArg(Expression arg,
                       int argNum)
                throws WrongNumberArgsException

  Set an argument expression for a function. This method is called by the XPath compiler.

  Parameters:
    `arg` - non-null expression that represents the argument.
    `argNum` - The argument number index.
  Throws:
    WrongNumberArgsException - If the argNum parameter is greater than 0.
  Overrides:
    setArg in class Function

### checkNumberArgs

    public void checkNumberArgs(int argNum)
                         throws WrongNumberArgsException

  Check that the number of arguments passed to this function is correct.

  Parameters:
    `argNum` - The number of arguments that is being passed to the function.
  Throws:
    WrongNumberArgsException -
  Overrides:
    checkNumberArgs in class Function

### canTraverseOutsideSubtree

    public boolean canTraverseOutsideSubtree()

  Tell if this expression or it's subexpressions can traverse outside the current subtree.

  Returns:
    true if traversal outside the context node's subtree can occur.
  Overrides:
    canTraverseOutsideSubtree in class Expression

### fixupVariables

    public void fixupVariables(java.util.Vector vars,
                               int globalsSize)

  This function is used to fixup variables from QNames to stack frame indexes at stylesheet build time.

  Parameters:
    `vars` - List of QNames that correspond to variables. This list should be searched backwards for the first qualified name that corresponds to the variable reference qname. The position of the QName in the vector from the start of the vector will be its position in the stack frame (but variables above the globalsTop value will need to be offset to the current stack frame).
  Overrides:
    fixupVariables in class Expression

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