Package com.google.refine.expr

Class MetaParser

java.lang.Object

com.google.refine.expr.MetaParser

public abstract class MetaParser
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MetaParser.LanguageInfo

Field Summary

Fields

Modifier and Type	Field	Description
protected static final Map<String,MetaParser.LanguageInfo>	s_languages

Constructor Summary

Constructors

Constructor	Description
MetaParser()

Method Summary

Modifier and Type	Method	Description
static MetaParser.LanguageInfo	getLanguageInfo(String languagePrefix)
static Set<String>	getLanguagePrefixes()
static Evaluable	parse(String s)	Parse an expression that might have a language prefix into an Evaluable.
protected static Evaluable	parseGREL(String s)
static void	registerLanguageParser(String languagePrefix, String name, LanguageSpecificParser parser, String defaultExpression)	languagePrefix will be stored in the meta model as an identifier.

Methods inherited from class java.lang.Object

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

Field Details

s_languages

protected static final Map<String,MetaParser.LanguageInfo> s_languages

Constructor Details

MetaParser

public MetaParser()

Method Details

registerLanguageParser

public static void registerLanguageParser(String languagePrefix,
 String name,
 LanguageSpecificParser parser,
 String defaultExpression)

languagePrefix will be stored in the meta model as an identifier. so be careful when change it as it will break the backward compatibility for the old project

Parameters:

languagePrefix -

name -

parser -

defaultExpression -

getLanguageInfo

public static MetaParser.LanguageInfo getLanguageInfo(String languagePrefix)

getLanguagePrefixes

public static Set<String> getLanguagePrefixes()

parse

public static Evaluable parse(String s)
                       throws ParsingException

Parse an expression that might have a language prefix into an Evaluable. Expressions without valid prefixes or without any prefix are assumed to be GREL expressions.

Parameters:

s -

Returns:

Throws:

ParsingException

parseGREL

protected static Evaluable parseGREL(String s)
                              throws ParsingException

Throws:

ParsingException