com.saxonica.ee.trans

Class Precondition.StringHashPrecondition

java.lang.Object

com.saxonica.ee.trans.Precondition

com.saxonica.ee.trans.Precondition.StringHashPrecondition

Enclosing class:

Precondition

public static class Precondition.StringHashPrecondition
extends Precondition

A StringHashPrecondition compares a characteristic in the form of a set of integer hash codes against a constant hash code; the precondition is satisfied if the constant hash code is present in the set.

It is used in two situations:

(a) for a predicate pattern in the form *[EXP = 'constant'] where the constant hash code is the hash code of the collation key of the constant string, and the characteristic is the set of hash codes corresponding to the collation keys of the strings selected by evaluating EXP.

(b) for a predicate pattern in the form *[contains(EXP, ' constant ')], typically encountered in DITA stylesheets, where the constant hash code is the hash code of the collation key of the token being matched (the constant with whitespace trimmed), and the characteristic is the set of hash codes corresponding to the collation keys of the tokens found by evaluating EXP and splitting on whitespace boundaries.

Nested Class Summary

Nested classes/interfaces inherited from class com.saxonica.ee.trans.Precondition

Precondition.BooleanPrecondition, Precondition.NumericComparisonPrecondition, Precondition.StringHashPrecondition

Constructor Summary

Constructors

Constructor and Description
StringHashPrecondition(Characteristic<IntSet> characteristic, AtomicMatchKey required, StringCollator collator)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
int	hashCode()
boolean	isShared()
boolean	testPrecondition(PreconditionMatcher matcher)
java.lang.String	toString()

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

getSlotNumber, isSatisfied, setSlotNumber

Methods inherited from class java.lang.Object

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

Constructor Detail

StringHashPrecondition

public StringHashPrecondition(Characteristic<IntSet> characteristic,
                              AtomicMatchKey required,
                              StringCollator collator)

Method Detail

testPrecondition

public boolean testPrecondition(PreconditionMatcher matcher)
                         throws XPathException

Specified by:

testPrecondition in class Precondition

Throws:

XPathException

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

isShared

public boolean isShared()

Specified by:

isShared in class Precondition