TokenMatchOperand

java.lang.Object
- com.saxonica.ee.trans.Characteristic<IntSet>
- - com.saxonica.ee.trans.TokenMatchOperand

```
public class TokenMatchOperand
extends Characteristic<IntSet>
```
Given an expression, this characteristic evaluates the set of hash keys corresponding to the whitespace-separated tokens in the string values of the items selected by that expression.
It is used typically in optimizing patterns in DITA stylesheets, where the pattern takes the form *[@class = ' topic/li '] or similar. In this example the characteristic will be obtained by tokenizing the value of @class on whitespace boundaries, and finding the hash code of the collation key of each of these tokens. This set of hash codes is then compared with the hashcode of the constant string ' topic/li '. The benefit comes only when a rule chain contains many rules with this same general structure, but different constant strings; the same set of hash codes will then be compared against each of the string constants in turn.

Constructor Summary

Constructors
Constructor Description

TokenMatchOperand(Expression exp)
Create a token match characteristic

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(java.lang.Object obj)`
`IntSet`	`evaluate(XPathContext context)`	Evaluate the value of this characteristic for 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
  - TokenMatchOperand
```
public TokenMatchOperand(Expression exp)
```
    Create a token match characteristic
    
    Parameters:
    
    exp - the expression to be tokenized. In the case of DITA-OT stylesheets, this expression will generally be "@class".
- Method Detail
  - evaluate
```
public IntSet evaluate(XPathContext context)
                throws XPathException
```
    Description copied from class: Characteristic
    
    Evaluate the value of this characteristic for the context item
    
    Specified by:
    
    evaluate in class Characteristic<IntSet>
    
    Parameters:
    
    context - the dynamic evaluation context; the context item is the item being matched
    
    Returns:
    
    the value of the characteristic
    
    Throws:
    
    XPathException - if evaluation of the characteristic fails
  - 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