Package com.yahoo.vespa.indexinglanguage

Class ExpressionOptimizer

java.lang.Object

com.yahoo.vespa.indexinglanguage.ExpressionConverter

com.yahoo.vespa.indexinglanguage.ExpressionOptimizer

All Implemented Interfaces:

Cloneable

public class ExpressionOptimizer
extends ExpressionConverter

Optimizes expressions by removing expressions that have no effect. Typical examples are statements that come before a statement that generates a new execution value without regard for the existing one.

Constructor Summary

Constructors

Constructor	Description
ExpressionOptimizer()

Method Summary

Modifier and Type	Method	Description
protected Expression	doConvert(Expression exp)
protected boolean	shouldConvert(Expression exp)

Methods inherited from class com.yahoo.vespa.indexinglanguage.ExpressionConverter

branch, clone, convert

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ExpressionOptimizer

public ExpressionOptimizer()

Method Details

shouldConvert

protected boolean shouldConvert(Expression exp)

Specified by:

shouldConvert in class ExpressionConverter

doConvert

protected Expression doConvert(Expression exp)

Specified by:

doConvert in class ExpressionConverter