org.datanucleus.store.rdbms.table

Class ClassView

java.lang.Object

org.datanucleus.store.rdbms.table.AbstractTable

org.datanucleus.store.rdbms.table.ViewImpl

org.datanucleus.store.rdbms.table.ClassView

All Implemented Interfaces:

DatastoreClass, org.datanucleus.store.schema.table.Table

public class ClassView
extends ViewImpl
implements DatastoreClass

Representation of an SQL View for a Class. Requires that the class use "nondurable" identity. Since a view is read-only, many methods throw exceptions that the operation is not supported.

Field Summary

Fields inherited from class org.datanucleus.store.rdbms.table.AbstractTable

columns, columnsByIdentifier, dba, existsInDatastore, identifier, state, storeMgr, TABLE_STATE_INITIALIZED, TABLE_STATE_INITIALIZED_MODIFIED, TABLE_STATE_NEW, TABLE_STATE_PK_INITIALIZED, TABLE_STATE_VALIDATED

Constructor Summary

Constructors

Constructor and Description
ClassView(DatastoreIdentifier tableName, RDBMSStoreManager storeMgr, org.datanucleus.metadata.ClassMetaData cmd) Constructor for class view.

Method Summary

Modifier and Type	Method and Description
DatastoreClass	getBaseDatastoreClass() Accessor for the base datastore class.
DatastoreClass	getBaseDatastoreClassWithMember(org.datanucleus.metadata.AbstractMemberMetaData mmd) Accessor for the base datastore class (table) managing the given field.
org.datanucleus.metadata.DiscriminatorMetaData	getDiscriminatorMetaData() Accessor for Discriminator MetaData
JavaTypeMapping	getExternalMapping(org.datanucleus.metadata.AbstractMemberMetaData mmd, MappingType mappingType) Accessor for the external mapping for the specified member of the specified mapping type.
org.datanucleus.metadata.AbstractMemberMetaData	getFieldMetaData(String fieldName) Accessor for the MetaData for the named field
org.datanucleus.metadata.IdentityType	getIdentityType() Accessor for the identity type in use.
JavaTypeMapping	getIdMapping() Accessor for a mapping for the ID.
String[]	getManagedClasses() Accessor for the names of all classes managed by this table.
JavaTypeMapping	getMemberMapping(org.datanucleus.metadata.AbstractMemberMetaData mmd) Accessor for the mapping for the specified field/property.
JavaTypeMapping	getMemberMapping(String fieldName) Accessor for the field mapping for the specified field name.
JavaTypeMapping	getMemberMappingInDatastoreClass(org.datanucleus.metadata.AbstractMemberMetaData mmd) Accessor for the mapping for the specified field only in this datastore class.
org.datanucleus.metadata.AbstractMemberMetaData	getMetaDataForExternalMapping(JavaTypeMapping mapping, MappingType mappingType) Accessor for the owner field metadata for the specified external mapping of the specified type
Collection	getSecondaryDatastoreClasses() Accessor for any secondary tables for this table.
protected List<String>	getSQLCreateStatements(Properties props) Method to return the necessary SQL create statements for this table.
DatastoreClass	getSuperDatastoreClass() Accessor for the supertable for this table.
Column	getSurrogateColumn(org.datanucleus.store.schema.table.SurrogateColumnType colType)
String	getType() Accessor for the type of the class being represented by this view.
org.datanucleus.metadata.VersionMetaData	getVersionMetaData() Accessor for Version MetaData
void	initialize(org.datanucleus.ClassLoaderResolver clr) Method to initialise the view.
boolean	isBaseDatastoreClass() Accessor for whether this is a base datastore class (root in a hierarchy).
boolean	isObjectIdDatastoreAttributed() Accessor for whether the object ID is attributed in the datastore.
boolean	isSuperDatastoreClass(DatastoreClass table) Accessor whether the supplied DatastoreClass is a supertable of this table.
boolean	managesClass(String className) Accessor for whether this table manages the specified class
boolean	managesMapping(JavaTypeMapping mapping) Convenience method to return if this table manages the columns for the supplied mapping.
void	postInitialize(org.datanucleus.ClassLoaderResolver clr) Post initilize.
void	provideExternalMappings(MappingConsumer consumer, MappingType mappingType) Instruction to provide all external mappings to the passed consumer.
void	provideMappingsForMembers(MappingConsumer consumer, org.datanucleus.metadata.AbstractMemberMetaData[] fieldNumbers, boolean includeSecondaryTables) Provide the mappings to the consumer for all specified members.
void	provideNonPrimaryKeyMappings(MappingConsumer consumer) Provide the mappings to the consumer for all non primary-key fields mapped to this table.
void	providePrimaryKeyMappings(MappingConsumer consumer) Provide the mappings to the consumer for all primary-key fields mapped to this table (for application identity).
void	provideSurrogateMapping(org.datanucleus.store.schema.table.SurrogateColumnType colType, MappingConsumer consumer) Provide the mapping for the specified surrogate column (if present).
void	provideUnmappedColumns(MappingConsumer consumer) Method to provide all unmapped datastore fields (columns) to the consumer.

Methods inherited from class org.datanucleus.store.rdbms.table.ViewImpl

addColumnInternal, getSQLDropStatements, preInitialize, validate

Methods inherited from class org.datanucleus.store.rdbms.table.AbstractTable

addColumn, allowDDLOutput, assertIsInitialized, assertIsInitializedModified, assertIsPKInitialized, assertIsPKUninitialized, assertIsUninitialized, assertIsValidated, create, drop, equals, executeDdlStatement, executeDdlStatementList, exists, getCatalogName, getClassMetaData, getColumn, getColumnForName, getColumnForPosition, getColumns, getDatastoreIdentifierFullyQualified, getIdentifier, getMemberColumnMappingForEmbeddedMember, getMemberColumnMappingForMember, getMemberColumnMappings, getName, getNumberOfColumns, getSchemaName, getStoreManager, getSurrogateMapping, hasColumn, hasColumnName, hashCode, isInitialized, isInitializedModified, isPKInitialized, isValidated, tableExistsInDatastore, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.datanucleus.store.rdbms.table.DatastoreClass

toString

Methods inherited from interface org.datanucleus.store.rdbms.table.Table

addColumn, create, drop, exists, getColumn, getIdentifier, getStoreManager, getSurrogateMapping, hasColumn, isInitialized, isInitializedModified, isValidated, preInitialize, validate

Methods inherited from interface org.datanucleus.store.schema.table.Table

getCatalogName, getClassMetaData, getColumnForName, getColumnForPosition, getColumns, getMemberColumnMappingForEmbeddedMember, getMemberColumnMappingForMember, getMemberColumnMappings, getName, getNumberOfColumns, getSchemaName

Constructor Detail

ClassView

public ClassView(DatastoreIdentifier tableName,
                 RDBMSStoreManager storeMgr,
                 org.datanucleus.metadata.ClassMetaData cmd)

Constructor for class view.

Parameters:

tableName - The name of the view.

storeMgr - The RDBMS manager managing this view

cmd - The metadata for the class represented by this view.

Method Detail

initialize

public void initialize(org.datanucleus.ClassLoaderResolver clr)

Method to initialise the view. Generates the mappings for all fields in the class to map to this view.

Parameters:

clr - The ClassLoaderResolver

postInitialize

public void postInitialize(org.datanucleus.ClassLoaderResolver clr)

Post initilize. For things that must be set after all classes have been initialized before

Overrides:

postInitialize in class ViewImpl

Parameters:

clr - the ClassLoaderResolver

getIdMapping

public JavaTypeMapping getIdMapping()

Accessor for a mapping for the ID. A view row doesn't have an id as such.

Returns:

The ID mapping.

getBaseDatastoreClassWithMember

public DatastoreClass getBaseDatastoreClassWithMember(org.datanucleus.metadata.AbstractMemberMetaData mmd)

Accessor for the base datastore class (table) managing the given field. Returns null since we dont manage things the same with views.

Specified by:

getBaseDatastoreClassWithMember in interface DatastoreClass

Parameters:

mmd - MetaData for the field

Returns:

The base table.

getSuperDatastoreClass

public DatastoreClass getSuperDatastoreClass()

Accessor for the supertable for this table.

Specified by:

getSuperDatastoreClass in interface DatastoreClass

Returns:

The supertable

isSuperDatastoreClass

public boolean isSuperDatastoreClass(DatastoreClass table)

Accessor whether the supplied DatastoreClass is a supertable of this table.

Specified by:

isSuperDatastoreClass in interface DatastoreClass

Parameters:

table - The DatastoreClass to check

Returns:

Whether it is a supertable (somewhere up the inheritance tree)

getSecondaryDatastoreClasses

public Collection getSecondaryDatastoreClasses()

Accessor for any secondary tables for this table.

Specified by:

getSecondaryDatastoreClasses in interface DatastoreClass

Returns:

Secondary tables (if any)

managesClass

public boolean managesClass(String className)

Accessor for whether this table manages the specified class

Specified by:

managesClass in interface DatastoreClass

Parameters:

className - Name of the class

Returns:

Whether it is managed by this table

getManagedClasses

public String[] getManagedClasses()

Description copied from interface: DatastoreClass

Accessor for the names of all classes managed by this table.

Specified by:

getManagedClasses in interface DatastoreClass

Returns:

Names of the classes managed (stored) here

managesMapping

public boolean managesMapping(JavaTypeMapping mapping)

Convenience method to return if this table manages the columns for the supplied mapping.

Specified by:

managesMapping in interface DatastoreClass

Parameters:

mapping - The mapping

Returns:

Whether the mapping is managed in this table

getFieldMetaData

public org.datanucleus.metadata.AbstractMemberMetaData getFieldMetaData(String fieldName)

Accessor for the MetaData for the named field

Parameters:

fieldName - Name of the field

Returns:

MetaData for the field

getIdentityType

public org.datanucleus.metadata.IdentityType getIdentityType()

Accessor for the identity type in use.

Specified by:

getIdentityType in interface DatastoreClass

Returns:

The identity type

isBaseDatastoreClass

public boolean isBaseDatastoreClass()

Accessor for whether this is a base datastore class (root in a hierarchy). Returns true since we dont use inheritance in views.

Specified by:

isBaseDatastoreClass in interface DatastoreClass

Returns:

Whether this is the base datastore class (table)

getBaseDatastoreClass

public DatastoreClass getBaseDatastoreClass()

Description copied from interface: DatastoreClass

Accessor for the base datastore class. Returns this object if it has no superclass table, otherwise goes up to the superclass etc.

Specified by:

getBaseDatastoreClass in interface DatastoreClass

Returns:

The base datastore class

isObjectIdDatastoreAttributed

public boolean isObjectIdDatastoreAttributed()

Accessor for whether the object ID is attributed in the datastore. Returns false since we dont use such things on views.

Specified by:

isObjectIdDatastoreAttributed in interface DatastoreClass

Returns:

Whether it is attributed in the datastore.

provideSurrogateMapping

public void provideSurrogateMapping(org.datanucleus.store.schema.table.SurrogateColumnType colType,
                                    MappingConsumer consumer)

Description copied from interface: DatastoreClass

Provide the mapping for the specified surrogate column (if present). This can be datastore id, discriminator, version, multitenancy, soft-delete, etc.

Specified by:

provideSurrogateMapping in interface DatastoreClass

Parameters:

colType - Type of surrogate column

consumer - The consumer for the mapping

provideMappingsForMembers

public void provideMappingsForMembers(MappingConsumer consumer,
                                      org.datanucleus.metadata.AbstractMemberMetaData[] fieldNumbers,
                                      boolean includeSecondaryTables)

Description copied from interface: DatastoreClass

Provide the mappings to the consumer for all specified members.

Specified by:

provideMappingsForMembers in interface DatastoreClass

Parameters:

consumer - Consumer for the mappings

fieldNumbers - MetaData of the fields/properties to provide mappings for

includeSecondaryTables - Whether to supply fields in secondary tables

providePrimaryKeyMappings

public void providePrimaryKeyMappings(MappingConsumer consumer)

Description copied from interface: DatastoreClass

Provide the mappings to the consumer for all primary-key fields mapped to this table (for application identity).

Specified by:

providePrimaryKeyMappings in interface DatastoreClass

Parameters:

consumer - Consumer for the mappings

provideNonPrimaryKeyMappings

public void provideNonPrimaryKeyMappings(MappingConsumer consumer)

Description copied from interface: DatastoreClass

Provide the mappings to the consumer for all non primary-key fields mapped to this table.

Specified by:

provideNonPrimaryKeyMappings in interface DatastoreClass

Parameters:

consumer - Consumer for the mappings

provideExternalMappings

public void provideExternalMappings(MappingConsumer consumer,
                                    MappingType mappingType)

Description copied from interface: DatastoreClass

Instruction to provide all external mappings to the passed consumer.

Specified by:

provideExternalMappings in interface DatastoreClass

Parameters:

consumer - The consumer for the mappings

mappingType - Type of external mapping to provide

provideUnmappedColumns

public void provideUnmappedColumns(MappingConsumer consumer)

Method to provide all unmapped datastore fields (columns) to the consumer.

Specified by:

provideUnmappedColumns in interface DatastoreClass

Parameters:

consumer - Consumer of information

getType

public String getType()

Accessor for the type of the class being represented by this view.

Specified by:

getType in interface DatastoreClass

Returns:

The name of the class being represented here

getMemberMapping

public JavaTypeMapping getMemberMapping(org.datanucleus.metadata.AbstractMemberMetaData mmd)

Accessor for the mapping for the specified field/property.

Specified by:

getMemberMapping in interface DatastoreClass

Parameters:

mmd - Metadata for the field/property

Returns:

The Mapping for the field.

getMemberMappingInDatastoreClass

public JavaTypeMapping getMemberMappingInDatastoreClass(org.datanucleus.metadata.AbstractMemberMetaData mmd)

Accessor for the mapping for the specified field only in this datastore class.

Specified by:

getMemberMappingInDatastoreClass in interface DatastoreClass

Parameters:

mmd - Metadata of the field/property

Returns:

The Mapping for the field (or null if not present here)

getMemberMapping

public JavaTypeMapping getMemberMapping(String fieldName)

Accessor for the field mapping for the specified field name.

Specified by:

getMemberMapping in interface DatastoreClass

Parameters:

fieldName - Name of the field

Returns:

The Java type mapping for the field

getSQLCreateStatements

protected List<String> getSQLCreateStatements(Properties props)

Method to return the necessary SQL create statements for this table.

Specified by:

getSQLCreateStatements in class AbstractTable

Parameters:

props - Properties for controlling the creation of views

Returns:

The SQL create statements.

getSurrogateColumn

public Column getSurrogateColumn(org.datanucleus.store.schema.table.SurrogateColumnType colType)

Specified by:

getSurrogateColumn in interface org.datanucleus.store.schema.table.Table

Overrides:

getSurrogateColumn in class AbstractTable

getDiscriminatorMetaData

public final org.datanucleus.metadata.DiscriminatorMetaData getDiscriminatorMetaData()

Accessor for Discriminator MetaData

Overrides:

getDiscriminatorMetaData in class AbstractTable

Returns:

Returns the Discriminator MetaData.

getVersionMetaData

public final org.datanucleus.metadata.VersionMetaData getVersionMetaData()

Accessor for Version MetaData

Overrides:

getVersionMetaData in class AbstractTable

Returns:

Returns the Version MetaData.

getExternalMapping

public JavaTypeMapping getExternalMapping(org.datanucleus.metadata.AbstractMemberMetaData mmd,
                                          MappingType mappingType)

Description copied from interface: DatastoreClass

Accessor for the external mapping for the specified member of the specified mapping type. An external mapping is a mapping for which there is no field in the actual class to represent it (part of a relation). The type can be FK, FK discriminator, order, etc

Specified by:

getExternalMapping in interface DatastoreClass

Parameters:

mmd - MetaData for the (external) field/property

mappingType - The type of mapping

Returns:

The external mapping

getMetaDataForExternalMapping

public org.datanucleus.metadata.AbstractMemberMetaData getMetaDataForExternalMapping(JavaTypeMapping mapping,
                                                                                     MappingType mappingType)

Description copied from interface: DatastoreClass

Accessor for the owner field metadata for the specified external mapping of the specified type

Specified by:

getMetaDataForExternalMapping in interface DatastoreClass

Parameters:

mapping - The external mapping

mappingType - The type of mapping

Returns:

Field MetaData in the owner class