Package org.springframework.data.relational.core.sql

Interface IdentifierProcessing

public interface IdentifierProcessing

An interface describing the processing steps for the conversion of SqlIdentifier to SQL snippets or column names.

Since:

2.0

Author:

Jens Schauder

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static enum	IdentifierProcessing.LetterCasing	Encapsulates the three kinds of letter casing supported.
static class	IdentifierProcessing.Quoting	A conversion from unquoted identifiers to quoted identifiers.

Field Summary

Fields

Modifier and Type	Field	Description
static final IdentifierProcessing	ANSI	An IdentifierProcessing that can be used for databases adhering to the SQL standard which uses double quotes (") for quoting and makes unquoted literals equivalent to upper case.
static final IdentifierProcessing	NONE	An IdentifierProcessing without applying transformations.

Method Summary

Modifier and Type	Method	Description
static org.springframework.data.relational.core.sql.DefaultIdentifierProcessing	create(IdentifierProcessing.Quoting quoting, IdentifierProcessing.LetterCasing letterCasing)	Create a IdentifierProcessing rule given IdentifierProcessing.Quoting and IdentifierProcessing.LetterCasing rules.
String	quote(String identifier)	Converts a String representing a bare name of an identifier to a String with proper quoting applied.
String	standardizeLetterCase(String identifier)	Standardizes the use of upper and lower case letters in an identifier in such a way that semantically the same identifier results from the quoted and the unquoted version.

Field Details

ANSI

static final IdentifierProcessing ANSI

An IdentifierProcessing that can be used for databases adhering to the SQL standard which uses double quotes (") for quoting and makes unquoted literals equivalent to upper case.

NONE

static final IdentifierProcessing NONE

An IdentifierProcessing without applying transformations.

Method Details

create

static org.springframework.data.relational.core.sql.DefaultIdentifierProcessing create(IdentifierProcessing.Quoting quoting,
 IdentifierProcessing.LetterCasing letterCasing)

Create a IdentifierProcessing rule given IdentifierProcessing.Quoting and IdentifierProcessing.LetterCasing rules.

Parameters:

quoting - quoting rules.

letterCasing - IdentifierProcessing.LetterCasing rules for identifier normalization.

Returns:

a new IdentifierProcessing object.

quote

String quote(String identifier)

Converts a String representing a bare name of an identifier to a String with proper quoting applied.

Parameters:

identifier - the name of an identifier. Must not be null.

Returns:

a quoted name of an identifier. Guaranteed to be not null.

standardizeLetterCase

String standardizeLetterCase(String identifier)

Standardizes the use of upper and lower case letters in an identifier in such a way that semantically the same identifier results from the quoted and the unquoted version. If this is not possible use of IdentifierProcessing.LetterCasing.AS_IS is recommended.

Parameters:

identifier - an identifier with arbitrary upper and lower cases. must not be null.

Returns:

an identifier with standardized use of upper and lower case letter. Guaranteed to be not null.