Class JPOXIdentifierFactory

java.lang.Object

org.datanucleus.store.rdbms.identifier.AbstractIdentifierFactory

org.datanucleus.store.rdbms.identifier.DNIdentifierFactory

org.datanucleus.store.rdbms.identifier.JPOXIdentifierFactory

All Implemented Interfaces:

IdentifierFactory

public class JPOXIdentifierFactory
extends DNIdentifierFactory

Factory that creates immutable instances of DatastoreIdentifier for mapped datastores. Provides the "JPOX" naming strategy like with DNIdentifierFactory except this uses a consistent hashing process to match JPOX.

Field Summary

Fields

Modifier and Type	Field	Description
private static final int	HASH_RANGE	Range to use for creating hased ending when truncating identifiers.

Fields inherited from class DNIdentifierFactory

tablePrefix, tableSuffix

Fields inherited from class AbstractIdentifierFactory

candidates, CASE_LOWER, CASE_PRESERVE, CASE_UPPER, clr, columns, dba, defaultCatalogName, defaultSchemaName, foreignkeys, indexes, namingCase, namingFactory, primarykeys, quoteString, references, sequences, tables, wordSeparator

Fields inherited from interface IdentifierFactory

PROPERTY_DEFAULT_CATALOG, PROPERTY_DEFAULT_SCHEMA, PROPERTY_NAMING_FACTORY, PROPERTY_REQUIRED_CASE, PROPERTY_TABLE_PREFIX, PROPERTY_TABLE_SUFFIX, PROPERTY_WORD_SEPARATOR

Constructor Summary

Constructors

Constructor	Description
JPOXIdentifierFactory(DatastoreAdapter dba, org.datanucleus.ClassLoaderResolver clr, Map props)

Method Summary

Modifier and Type	Method	Description
protected String	truncate(String identifier, int length)	Method to truncate an identifier to fit within the specified identifier length.

Methods inherited from class DNIdentifierFactory

generateIdentifierNameForJavaName, getColumnIdentifierSuffix, newAdapterIndexFieldIdentifier, newDiscriminatorFieldIdentifier, newForeignKeyFieldIdentifier, newIndexFieldIdentifier, newJoinTableFieldIdentifier, newReferenceFieldIdentifier, newTableIdentifier, newTableIdentifier, newVersionFieldIdentifier

Methods inherited from class AbstractIdentifierFactory

getDatastoreAdapter, getIdentifierInAdapterCase, getIdentifierNamePartsFromName, getIdentifierTruncatedToAdapterColumnLength, getNamingCase, getWordSeparator, newCandidateKeyIdentifier, newColumnIdentifier, newColumnIdentifier, newForeignKeyIdentifier, newIdentifier, newIdentifier, newIndexIdentifier, newPrimaryKeyIdentifier, newSequenceIdentifier, newTableIdentifier, newTableIdentifier, setCatalogSchemaForTable

Methods inherited from class Object

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

Field Details

HASH_RANGE

private static final int HASH_RANGE

Range to use for creating hased ending when truncating identifiers.

See Also:

• Constant Field Values

Constructor Details

JPOXIdentifierFactory

public JPOXIdentifierFactory(DatastoreAdapter dba,
 org.datanucleus.ClassLoaderResolver clr,
 Map props)

Method Details

truncate

protected String truncate(String identifier,
 int length)

Method to truncate an identifier to fit within the specified identifier length. If truncation is necessary will use a 2 char hashcode (at the end) to attempt to create uniqueness.

Overrides:

truncate in class AbstractIdentifierFactory

Parameters:

identifier - The identifier

length - The (max) length to use

Returns:

The truncated identifier.