io.cdap.wrangler.parser

Class GrammarWalker

java.lang.Object

io.cdap.wrangler.parser.GrammarWalker

public class GrammarWalker
extends Object

This class provides logic to walk a grammar tree by parsing a wrangler recipe.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	GrammarWalker.Visitor<E extends Exception> A visitor for the the recipe grammar.

Constructor Summary

Constructors

Constructor and Description
GrammarWalker(Compiler compiler, DirectiveContext context)

Method Summary

Modifier and Type	Method and Description
<E extends Exception> void	walk(String recipe, GrammarWalker.Visitor<E> visitor) Walks the grammar tree generated by the recipe.

Methods inherited from class java.lang.Object

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

Constructor Detail

GrammarWalker

public GrammarWalker(Compiler compiler,
                     DirectiveContext context)

Method Detail

walk

public <E extends Exception> void walk(String recipe,
                                       GrammarWalker.Visitor<E> visitor)
                                throws CompileException,
                                       DirectiveParseException,
                                       E extends Exception

Walks the grammar tree generated by the recipe.

Type Parameters:

E - type of exception that can be thrown by the visitor

Parameters:

recipe - the recipe to parse

visitor - the visitor for walking the grammar tree

Throws:

CompileException - if failed to compile the recipe

DirectiveParseException - if a directive in the recipe is invalid

E - if the visitor throws an exception

E extends Exception