org.datanucleus.store.schema.naming

Class AbstractNamingFactory

java.lang.Object

org.datanucleus.store.schema.naming.AbstractNamingFactory

All Implemented Interfaces:

NamingFactory

Direct Known Subclasses:

DN2NamingFactory, JPANamingFactory

public abstract class AbstractNamingFactory
extends Object
implements NamingFactory

Abstract base for any naming factory, providing convenience facilities like truncation.

Field Summary

Fields

Modifier and Type	Field and Description
protected ClassLoaderResolver	clr
protected NamingCase	namingCase
protected NucleusContext	nucCtx
protected String	quoteString Quote used when the identifier case selected requires it.
protected Set<String>	reservedWords
protected String	wordSeparator Separator to use for words in the identifiers.

Constructor Summary

Constructors

Constructor and Description
AbstractNamingFactory(NucleusContext nucCtx)

Method Summary

Modifier and Type	Method and Description
String	getColumnName(AbstractMemberMetaData mmd, ColumnType type) Method to return the name of the column for the specified field.
String	getColumnName(List<AbstractMemberMetaData> mmds, int colPosition) Method to return the name of the column for the position of the specified EMBEDDED field, within the specified owner field.
String	getConstraintName(AbstractClassMetaData cmd, ConstraintMetaData cnstrmd, ColumnType type) Method to return the name of the constraint for the specified class (version, datastore-id, discriminator etc).
String	getConstraintName(AbstractClassMetaData cmd, ConstraintMetaData cnstrmd, int position) Method to return the name of a constraint specified at class level.
String	getConstraintName(String className, AbstractMemberMetaData mmd, ConstraintMetaData cnstrmd) Method to return the name of a constraint specified at member level.
protected int	getMaximumLengthForComponent(SchemaComponent cmpt)
protected String	getNameInRequiredCase(String name) Convenience method to convert the passed name into a name in the required "case".
String	getSequenceName(SequenceMetaData seqmd) Method to return the name of sequence.
String	getTableName(AbstractClassMetaData cmd) Method to return the name of the table for the specified class.
protected String	prepareIdentifierNameForUse(String name, SchemaComponent cmpt) Convenience method that will truncate the provided name if it is longer than the longest possible for the specified schema component, and then convert it into the required case.
NamingFactory	setMaximumLength(SchemaComponent cmpt, int max) Method to set the maximum length of the name of the specified schema component.
NamingFactory	setNamingCase(NamingCase nameCase) Method to set the required case of the names.
NamingFactory	setQuoteString(String quote) Method to set the quote string to use (when the identifiers need to be quoted).
NamingFactory	setReservedKeywords(Set<String> keywords) Method to set the provided list of keywords as names that identifiers have to surround by quotes to use.
NamingFactory	setWordSeparator(String sep) Method to set the word separator of the names.
protected static String	truncate(String name, int length) Method to truncate a name to fit within the specified name length.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.datanucleus.store.schema.naming.NamingFactory

getColumnName, getColumnName, getTableName

Field Detail

reservedWords

protected Set<String> reservedWords

wordSeparator

protected String wordSeparator

Separator to use for words in the identifiers.

quoteString

protected String quoteString

Quote used when the identifier case selected requires it.

namingCase

protected NamingCase namingCase

nucCtx

protected NucleusContext nucCtx

clr

protected ClassLoaderResolver clr

Constructor Detail

AbstractNamingFactory

public AbstractNamingFactory(NucleusContext nucCtx)

Method Detail

setReservedKeywords

public NamingFactory setReservedKeywords(Set<String> keywords)

Description copied from interface: NamingFactory

Method to set the provided list of keywords as names that identifiers have to surround by quotes to use.

Specified by:

setReservedKeywords in interface NamingFactory

Parameters:

keywords - The keywords

Returns:

This naming factory

setQuoteString

public NamingFactory setQuoteString(String quote)

Description copied from interface: NamingFactory

Method to set the quote string to use (when the identifiers need to be quoted). See

setIdentifierCase

.

Specified by:

setQuoteString in interface NamingFactory

Parameters:

quote - The quote string

Returns:

This naming factory

setWordSeparator

public NamingFactory setWordSeparator(String sep)

Description copied from interface: NamingFactory

Method to set the word separator of the names.

Specified by:

setWordSeparator in interface NamingFactory

Parameters:

sep - Separator

Returns:

This naming factory

setNamingCase

public NamingFactory setNamingCase(NamingCase nameCase)

Description copied from interface: NamingFactory

Method to set the required case of the names.

Specified by:

setNamingCase in interface NamingFactory

Parameters:

nameCase - Required case

Returns:

This naming factory

setMaximumLength

public NamingFactory setMaximumLength(SchemaComponent cmpt,
                                      int max)

Description copied from interface: NamingFactory

Method to set the maximum length of the name of the specified schema component.

Specified by:

setMaximumLength in interface NamingFactory

Parameters:

cmpt - The component

max - The maximum it accepts

Returns:

This naming factory

getMaximumLengthForComponent

protected int getMaximumLengthForComponent(SchemaComponent cmpt)

getTableName

public String getTableName(AbstractClassMetaData cmd)

Description copied from interface: NamingFactory

Method to return the name of the table for the specified class.

Specified by:

getTableName in interface NamingFactory

Parameters:

cmd - Metadata for the class

Returns:

Name of the table

getColumnName

public String getColumnName(AbstractMemberMetaData mmd,
                            ColumnType type)

Description copied from interface: NamingFactory

Method to return the name of the column for the specified field. If you have multiple columns for a field then call the other

getColumnName

method.

Specified by:

getColumnName in interface NamingFactory

Parameters:

mmd - Metadata for the field

type - Type of column

Returns:

The column name

getColumnName

public String getColumnName(List<AbstractMemberMetaData> mmds,
                            int colPosition)

Description copied from interface: NamingFactory

Method to return the name of the column for the position of the specified EMBEDDED field, within the specified owner field. For example, say we have a class Type1 with field "field1" that is marked as embedded, and this is of type Type2. In turn Type2 has a field "field2" that is also embedded, of type Type3. Type3 has a field "name". So to get the column name for Type3.name in the table for Type1 we call "getColumnName({mmdForField1InType1, mmdForField2InType2, mmdForNameInType3}, 0)".

Specified by:

getColumnName in interface NamingFactory

Parameters:

mmds - MetaData for the field(s) with the column. The first value is the original field that is embedded, followed by fields of the embedded object(s).

colPosition - The position of the column (where this field has multiple columns)

Returns:

The column name

getConstraintName

public String getConstraintName(AbstractClassMetaData cmd,
                                ConstraintMetaData cnstrmd,
                                int position)

Description copied from interface: NamingFactory

Method to return the name of a constraint specified at class level.

Specified by:

getConstraintName in interface NamingFactory

Parameters:

cmd - Metadata for the class

cnstrmd - The constraint metadata

position - Number of the constraint at class level (first is 0)

Returns:

Name of the constraint

getConstraintName

public String getConstraintName(String className,
                                AbstractMemberMetaData mmd,
                                ConstraintMetaData cnstrmd)

Description copied from interface: NamingFactory

Method to return the name of a constraint specified at member level.

Specified by:

getConstraintName in interface NamingFactory

Parameters:

className - Name of the class that this constraint is for.

mmd - Metadata for the member

cnstrmd - The constraint metadata

Returns:

Name of the constraint

getConstraintName

public String getConstraintName(AbstractClassMetaData cmd,
                                ConstraintMetaData cnstrmd,
                                ColumnType type)

Description copied from interface: NamingFactory

Method to return the name of the constraint for the specified class (version, datastore-id, discriminator etc).

Specified by:

getConstraintName in interface NamingFactory

Parameters:

cmd - Metadata for the class

cnstrmd - The constraint metadata

type - Column type

Returns:

Name of the constraint

getSequenceName

public String getSequenceName(SequenceMetaData seqmd)

Description copied from interface: NamingFactory

Method to return the name of sequence.

Specified by:

getSequenceName in interface NamingFactory

Parameters:

seqmd - Metadata for the sequence

Returns:

Name of the sequence

truncate

protected static String truncate(String name,
                                 int length)

Method to truncate a name to fit within the specified name length. If truncation is necessary will use a 4 char hashcode (defined by TRUNCATE_HASH_LENGTH) (at the end) to attempt to create uniqueness.

Parameters:

name - The name

length - The (max) length to use

Returns:

The truncated name.

getNameInRequiredCase

protected String getNameInRequiredCase(String name)

Convenience method to convert the passed name into a name in the required "case". Also adds on any required quoting.

Parameters:

name - The name

Returns:

The updated name in the correct case

prepareIdentifierNameForUse

protected String prepareIdentifierNameForUse(String name,
                                             SchemaComponent cmpt)

Convenience method that will truncate the provided name if it is longer than the longest possible for the specified schema component, and then convert it into the required case.

Parameters:

name - The name

cmpt - The schema component that it is for

Returns:

The prepared identifier name