Package com.saxonica.ee.trans

Class AncestorCharacteristic

java.lang.Object

com.saxonica.ee.trans.Characteristic

com.saxonica.ee.trans.AncestorCharacteristic

public class AncestorCharacteristic
extends Characteristic

Given an expression, this characteristic returns a boolean indicating whether or not the context item has a parent (or ancestor, respectively) that matches a given pattern

Constructor Summary

Constructors

Constructor	Description
AncestorCharacteristic(Pattern pattern, boolean isParent)	Define an AncestorCharacteristic

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object obj)	Test whether this characteristic is the same as another characteristic.
BooleanValue	evaluate(XPathContext context)	Evaluate the characteristic as applied to the context item
int	hashCode()
java.lang.String	toString()

Methods inherited from class com.saxonica.ee.trans.Characteristic

getSlotNumber, setSlotNumber

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AncestorCharacteristic

public AncestorCharacteristic(Pattern pattern,
                              boolean isParent)

Define an AncestorCharacteristic

Parameters:

pattern - the pattern that an ancestor/parent must satisfy if the characteristic is to have the value true

isParent - true if the pattern must match the immediate parent; false if the pattern must match some ancestor

Method Detail

evaluate

public BooleanValue evaluate(XPathContext context)
                      throws XPathException

Evaluate the characteristic as applied to the context item

Specified by:

evaluate in class Characteristic

Parameters:

context - the dynamic evaluation context; the context item is the item being matched

Returns:

true if there is an ancestor/parent satisfying the characteristic pattern. (We wrap this in a BooleanValue because the superclass expects Object, and using Boolean causes problems with C# translation.)

Throws:

XPathException - if pattern matching fails with a dynamic error

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Test whether this characteristic is the same as another characteristic.

Overrides:

equals in class java.lang.Object

Parameters:

obj - the object to be compared

Returns:

true if the two characteristics are equivalent

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object