io.cdap.wrangler.parser

Class MigrateToV2

java.lang.Object

io.cdap.wrangler.parser.MigrateToV2

All Implemented Interfaces:

GrammarMigrator

public final class MigrateToV2
extends Object
implements GrammarMigrator

This class MigrateToV2 translates from older version of grammar of directives into newer version of recipe grammar.

Following are the conversions that are performed :

• Convert column name from 'name' to ':name'.
• Text are quoted with with single or double quote.
• Expression or conditions are represented 'exp:{}'
• All directives are terminated by semicolo (;)

Constructor Summary

Constructors

Constructor and Description
MigrateToV2(List<String> recipe)
MigrateToV2(String recipe)
MigrateToV2(String[] recipe)
MigrateToV2(String recipe, String delimiter)

Method Summary

Modifier and Type	Method and Description
static String	getNextToken(StringTokenizer tokenizer, String directive, String field, int lineno)
static String	getNextToken(StringTokenizer tokenizer, String delimiter, String directive, String field, int lineno)
static String	getNextToken(StringTokenizer tokenizer, String delimiter, String directive, String field, int lineno, boolean optional)
String	migrate() Rewrites the directives in version 1.0 to version 2.0.

Methods inherited from class java.lang.Object

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

Constructor Detail

MigrateToV2

public MigrateToV2(List<String> recipe)

MigrateToV2

public MigrateToV2(String[] recipe)

MigrateToV2

public MigrateToV2(@Nullable
                   String recipe,
                   String delimiter)

MigrateToV2

public MigrateToV2(String recipe)

Method Detail

migrate

public String migrate()
               throws DirectiveParseException

Rewrites the directives in version 1.0 to version 2.0.

Specified by:

migrate in interface GrammarMigrator

Returns:

directives converted to version 2.0.

Throws:

DirectiveParseException

getNextToken

public static String getNextToken(StringTokenizer tokenizer,
                                  String directive,
                                  String field,
                                  int lineno)
                           throws DirectiveParseException

Throws:

DirectiveParseException

getNextToken

public static String getNextToken(StringTokenizer tokenizer,
                                  String delimiter,
                                  String directive,
                                  String field,
                                  int lineno)
                           throws DirectiveParseException

Throws:

DirectiveParseException

getNextToken

public static String getNextToken(StringTokenizer tokenizer,
                                  String delimiter,
                                  String directive,
                                  String field,
                                  int lineno,
                                  boolean optional)
                           throws DirectiveParseException

Throws:

DirectiveParseException