Package io.debezium.connector.oracle.antlr.listener

Class ParserUtils

java.lang.Object

io.debezium.connector.oracle.antlr.listener.ParserUtils

public class ParserUtils
extends Object

This class contains a few methods for parser listeners

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ParserUtils()

Method Summary

Modifier and Type	Method	Description
static void	cloneOldToNewColumnValues(Map<String,LogMinerColumnValueWrapper> newColumnValues, Map<String,LogMinerColumnValueWrapper> oldColumnValues, Table table)	Initialize new column values with old column values.
static Object	convertValueToSchemaType(Column column, Object value, OracleValueConverters converters)	This converts the given value to the appropriate object.
(package private) static String	getTableName(PlSqlParser.Tableview_nameContext tableview_name)	Obtains the table name
static String	removeApostrophes(String text)	In some cases values of the parsed expression are enclosed in apostrophes.
static String	replaceDoubleBackSlashes(String text)	this is to handle cases when a record contains escape character(s)
static String	stripeAlias(String text, String alias)	this method stripes table alias and dot give string
static String	stripeQuotes(String text)	stripes double quotes that surrounds a string

Methods inherited from class java.lang.Object

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

Constructor Detail

ParserUtils

private ParserUtils()

Method Detail

stripeQuotes

public static String stripeQuotes(String text)

stripes double quotes that surrounds a string

Parameters:

text - text

Returns:

text without surrounding double quotes

stripeAlias

public static String stripeAlias(String text,
                                 String alias)

this method stripes table alias and dot give string

Parameters:

text - string with possible alias

alias - table alias

Returns:

striped string

cloneOldToNewColumnValues

public static void cloneOldToNewColumnValues(Map<String,LogMinerColumnValueWrapper> newColumnValues,
                                             Map<String,LogMinerColumnValueWrapper> oldColumnValues,
                                             Table table)

Initialize new column values with old column values. It does not override new values which were processed already in where clause parsing

Parameters:

newColumnValues - values to set or insert

oldColumnValues - values in WHERE clause

table - Debezium Table object

convertValueToSchemaType

public static Object convertValueToSchemaType(Column column,
                                              Object value,
                                              OracleValueConverters converters)

This converts the given value to the appropriate object. The conversion is based on the column definition

Parameters:

column - column Object

value - value object

converters - given converter

Returns:

object as the result of this conversion. It could be null if converter cannot build the schema or if converter or value are null

removeApostrophes

public static String removeApostrophes(String text)

In some cases values of the parsed expression are enclosed in apostrophes. Even null values are surrounded by single apostrophes. This method removes them.

Parameters:

text - supplied value which might be enclosed by apostrophes.

Returns:

clean String or null in case if test = "null" or = "NULL"

replaceDoubleBackSlashes

public static String replaceDoubleBackSlashes(String text)

this is to handle cases when a record contains escape character(s)

Parameters:

text - before parsing we replaced it with double escape, now revert it back

Returns:

string with double slashes

getTableName

static String getTableName(PlSqlParser.Tableview_nameContext tableview_name)

Obtains the table name

Parameters:

tableview_name - table view context

Returns:

table name