File	Doc	Category	Size	Date	Package
FunctionDef1Arg.java	API Doc	Java SE 5 API	5325	Fri Aug 26 14:56:08 BST 2005	com.sun.org.apache.xpath.internal.functions

FunctionDef1Arg

• java.lang.Object
  • com.sun.org.apache.xpath.internal.Expression
    • com.sun.org.apache.xpath.internal.functions.Function
      • com.sun.org.apache.xpath.internal.functions.FunctionOneArg

Fields Summary

Constructors Summary

Methods Summary
public boolean	Arg0IsNodesetExpr() Tell if the expression is a nodeset expression. return true if the expression can be represented as a nodeset. return (null == m_arg0) ? true : m_arg0.isNodesetExpr();
public boolean	canTraverseOutsideSubtree() Tell if this expression or it's subexpressions can traverse outside the current subtree. return true if traversal outside the context node's subtree can occur. return (null == m_arg0) ? false : super.canTraverseOutsideSubtree();
public void	checkNumberArgs(int argNum) Check that the number of arguments passed to this function is correct. param argNum The number of arguments that is being passed to the function. throws WrongNumberArgsException if the number of arguments is not 0 or 1. if (argNum > 1) reportWrongNumberArgs();
protected int	getArg0AsNode(com.sun.org.apache.xpath.internal.XPathContext xctxt) Execute the first argument expression that is expected to return a nodeset. If the argument is null, then return the current context node. param xctxt Runtime XPath context. return The first node of the executed nodeset, or the current context node if the first argument is null. throws javax.xml.transform.TransformerException if an error occurs while executing the argument expression. return (null == m_arg0) ? xctxt.getCurrentNode() : m_arg0.asNode(xctxt);
protected double	getArg0AsNumber(com.sun.org.apache.xpath.internal.XPathContext xctxt) Execute the first argument expression that is expected to return a number. If the argument is null, then get the number value from the current context node. param xctxt Runtime XPath context. return The number value of the first argument, or the number value of the current context node if the first argument is null. throws javax.xml.transform.TransformerException if an error occurs while executing the argument expression. if(null == m_arg0) { int currentNode = xctxt.getCurrentNode(); if(DTM.NULL == currentNode) return 0; else { DTM dtm = xctxt.getDTM(currentNode); XMLString str = dtm.getStringValue(currentNode); return str.toDouble(); } } else return m_arg0.execute(xctxt).num();
protected com.sun.org.apache.xml.internal.utils.XMLString	getArg0AsString(com.sun.org.apache.xpath.internal.XPathContext xctxt) Execute the first argument expression that is expected to return a string. If the argument is null, then get the string value from the current context node. param xctxt Runtime XPath context. return The string value of the first argument, or the string value of the current context node if the first argument is null. throws javax.xml.transform.TransformerException if an error occurs while executing the argument expression. if(null == m_arg0) { int currentNode = xctxt.getCurrentNode(); if(DTM.NULL == currentNode) return XString.EMPTYSTRING; else { DTM dtm = xctxt.getDTM(currentNode); return dtm.getStringValue(currentNode); } } else return m_arg0.execute(xctxt).xstr();
protected void	reportWrongNumberArgs() Constructs and throws a WrongNumberArgException with the appropriate message for this function object. throws WrongNumberArgsException throw new WrongNumberArgsException(XSLMessages.createXPATHMessage(XPATHErrorResources.ER_ZERO_OR_ONE, null)); //"0 or 1");