com.google.appengine.api.search
Class ExpressionTreeBuilder

java.lang.Object
  com.google.appengine.api.search.ExpressionTreeBuilder

public class ExpressionTreeBuilder
extends java.lang.Object

A generator of AST representation of an expression. This class can use an optionally supplied CommonTreeAdaptor to process the tree further. If successful it returns the root of an AST representing the parsed query.

Constructor Summary

ExpressionTreeBuilder()

ExpressionTreeBuilder(CommonTreeAdaptor adaptor)

Method Summary

CommonTree

parse(java.lang.String expression) Parses the user expression and returns a CommonTree.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpressionTreeBuilder

public ExpressionTreeBuilder()

ExpressionTreeBuilder

public ExpressionTreeBuilder(CommonTreeAdaptor adaptor)

Method Detail

parse

public CommonTree parse(java.lang.String expression)
                 throws RecognitionException

Parses the user expression and returns a CommonTree.

Parameters:

expression - the expression to parse

Returns:

a CommonTree constructed from the expression

Throws:

RecognitionException - if the user expression is invalid