org.apache.oodt.xmlps.queryparser

Interface Expression

All Known Implementing Classes:

AndExpression, ContainsExpression, EqualsExpression, GreaterThanEqualsExpression, GreaterThanExpression, LessThanEqualsExpression, LessThanExpression, Literal, LogOpExpression, OrExpression, RelOpExpression, WildcardLiteral

public interface Expression

The abstract interface for our expression tree.

Method Summary

Methods

Modifier and Type	Method and Description
String	evaluate() Defines how to turn this Expression into a String-readable query to an underlying SQL database.

Method Detail

evaluate

String evaluate()

Defines how to turn this Expression into a String-readable query to an underlying SQL database.

Returns:

A String-readable version of this Expression.