org.apache.xalan.xpath
Class XNull

java.lang.Object
  |
  +--org.apache.xalan.xpath.XObject
        |
        +--org.apache.xalan.xpath.XNull

public class XNull

extends XObject

This class represents an XPath null object, and is capable of converting the null to other types, such as a string.

See Also:

Serialized Form

Fields inherited from class org.apache.xalan.xpath.XObject

CLASS_BOOLEAN, CLASS_NODESET, CLASS_NULL, CLASS_NUMBER, CLASS_RTREEFRAG, CLASS_STRING, CLASS_UNKNOWN

Constructor Summary

XNull()
Create an XObject.

Method Summary

boolean	bool() Cast result object to a boolean.
boolean	equals(XObject obj2) Tell if two objects are functionally equal.
int	getType() Tell what kind of class this is.
org.w3c.dom.NodeList	nodeset() Cast result object to a nodelist.
double	num() Cast result object to a number.
org.w3c.dom.DocumentFragment	rtree(XPathSupport support) Cast result object to a result tree fragment.
java.lang.String	str() Cast result object to a string.

Methods inherited from class org.apache.xalan.xpath.XObject

castToType, greaterThan, greaterThanOrEqual, lessThan, lessThanOrEqual, mutableNodeset, notEquals, object, rtree, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

XNull

public XNull()

Create an XObject.

Method Detail

getType

public int getType()

Tell what kind of class this is.

Overrides:

getType in class XObject

num

public double num()

Cast result object to a number.

Overrides:

num in class XObject

bool

public boolean bool()

Cast result object to a boolean.

Overrides:

bool in class XObject

str

public java.lang.String str()

Cast result object to a string.

Overrides:

str in class XObject

rtree

public org.w3c.dom.DocumentFragment rtree(XPathSupport support)

Cast result object to a result tree fragment.

Overrides:

rtree in class XObject

nodeset

public org.w3c.dom.NodeList nodeset()

Cast result object to a nodelist.

Overrides:

nodeset in class XObject

equals

public boolean equals(XObject obj2)

Tell if two objects are functionally equal.

Overrides:

equals in class XObject