org.datanucleus.store.rdbms.scostore

Class AbstractMapStore<K,V>

java.lang.Object

org.datanucleus.store.rdbms.scostore.BaseContainerStore

org.datanucleus.store.rdbms.scostore.AbstractMapStore<K,V>

All Implemented Interfaces:

org.datanucleus.store.scostore.MapStore<K,V>, org.datanucleus.store.scostore.Store

Direct Known Subclasses:

FKMapStore, JoinMapStore

public abstract class AbstractMapStore<K,V>
extends BaseContainerStore
implements org.datanucleus.store.scostore.MapStore<K,V>

Abstract representation of the backing store for a Map.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	iterateUsingDiscriminator Flag to set whether the iterator statement will use a discriminator or not.
protected JavaTypeMapping	keyMapping Mapping to the key from the mapTable.
protected boolean	keysAreEmbedded Whether the keys are embedded.
protected boolean	keysAreSerialised Whether the keys are serialised.
protected String	keyType Type of the key.
protected org.datanucleus.metadata.AbstractClassMetaData	kmd Metadata for the keys (if persistable).
protected Table	mapTable Table storing the map relation.
protected JavaTypeMapping	valueMapping Mapping to the value from the mapTable.
protected boolean	valuesAreEmbedded Whether the values are embedded.
protected boolean	valuesAreSerialised Whether the values are serialised.
protected DatastoreClass	valueTable Table storing the values.
protected String	valueType Type of the value.
protected org.datanucleus.metadata.AbstractClassMetaData	vmd Metadata for the values (if persistable).

Fields inherited from class org.datanucleus.store.rdbms.scostore.BaseContainerStore

allowNulls, clr, dba, ownerMapping, ownerMemberMetaData, relationType, storeMgr

Constructor Summary

Constructors

Constructor and Description
AbstractMapStore(RDBMSStoreManager storeMgr, org.datanucleus.ClassLoaderResolver clr)

Method Summary

Modifier and Type	Method and Description
boolean	containsKey(org.datanucleus.state.ObjectProvider op, Object key) Method to check if a key exists in the Map.
boolean	containsValue(org.datanucleus.state.ObjectProvider op, Object value) Method to check if a value exists in the Map.
V	get(org.datanucleus.state.ObjectProvider op, Object key) Method to return the value for a key.
JavaTypeMapping	getKeyMapping()
org.datanucleus.metadata.AbstractClassMetaData	getKmd()
Table	getMapTable()
protected String	getUpdateEmbeddedKeyStmt(JavaTypeMapping fieldMapping, JavaTypeMapping ownerMapping, JavaTypeMapping keyMapping, Table mapTable) Generate statement for update the field of an embedded key.
protected String	getUpdateEmbeddedValueStmt(JavaTypeMapping fieldMapping, JavaTypeMapping ownerMapping, JavaTypeMapping valueMapping, Table mapTable) Generate statement for update the field of an embedded value.
protected abstract V	getValue(org.datanucleus.state.ObjectProvider op, Object key) Method to retrieve a value from the Map given the key.
JavaTypeMapping	getValueMapping()
org.datanucleus.metadata.AbstractClassMetaData	getVmd()
protected void	initialise() Method to initialise the statements being used.
boolean	isValuesAreEmbedded()
boolean	isValuesAreSerialised()
boolean	keysAreEmbedded() Accessor for whether the keys are embedded or not.
boolean	keysAreSerialised() Accessor for whether the keys are serialised or not.
void	putAll(org.datanucleus.state.ObjectProvider op, Map<? extends K,? extends V> m) Method to put all elements from a Map into our Map.
boolean	updatedEmbeddedKey(org.datanucleus.state.ObjectProvider op, Object key, int fieldNumber, Object newValue, JavaTypeMapping fieldMapping)
boolean	updateEmbeddedKey(org.datanucleus.state.ObjectProvider op, Object key, int fieldNumber, Object newValue) Method to update a field of an embedded key.
boolean	updateEmbeddedValue(org.datanucleus.state.ObjectProvider op, Object value, int fieldNumber, Object newValue) Method to update a field of an embedded key.
boolean	updateEmbeddedValue(org.datanucleus.state.ObjectProvider op, Object value, int fieldNumber, Object newValue, JavaTypeMapping fieldMapping)
protected boolean	validateKeyForReading(org.datanucleus.state.ObjectProvider op, Object key) Utility to validate a key is ok for reading.
protected void	validateKeyForWriting(org.datanucleus.state.ObjectProvider ownerOP, Object key) Utility to validate a key is ok for writing (present in the datastore).
protected void	validateKeyType(org.datanucleus.ClassLoaderResolver clr, Object key) Utility to validate the type of a key for storing in the Map.
protected boolean	validateValueForReading(org.datanucleus.state.ObjectProvider op, Object value) Utility to validate a value is ok for reading.
protected void	validateValueForWriting(org.datanucleus.state.ObjectProvider ownerOP, Object value) Utility to validate a value is ok for writing (present in the datastore).
protected void	validateValueType(org.datanucleus.ClassLoaderResolver clr, Object value) Utility to validate the type of a value for storing in the Map.
boolean	valuesAreEmbedded() Accessor for whether the values are embedded or not.
boolean	valuesAreSerialised() Accessor for whether the values are serialised or not.

Methods inherited from class org.datanucleus.store.rdbms.scostore.BaseContainerStore

allowsBatching, getDatastoreAdapter, getObjectProviderForEmbeddedPCObject, getOwnerMapping, getOwnerMemberMetaData, getRelationType, getStoreManager, isEmbeddedMapping, setOwner

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.scostore.MapStore

clear, entrySetStore, keySetStore, put, remove, remove, valueCollectionStore

Methods inherited from interface org.datanucleus.store.scostore.Store

getOwnerMemberMetaData, getStoreManager

Field Detail

iterateUsingDiscriminator

protected boolean iterateUsingDiscriminator

Flag to set whether the iterator statement will use a discriminator or not.

mapTable

protected Table mapTable

Table storing the map relation. May be join table, or key table, or value table.

valueTable

protected DatastoreClass valueTable

Table storing the values.

kmd

protected org.datanucleus.metadata.AbstractClassMetaData kmd

Metadata for the keys (if persistable).

vmd

protected org.datanucleus.metadata.AbstractClassMetaData vmd

Metadata for the values (if persistable).

keyMapping

protected JavaTypeMapping keyMapping

Mapping to the key from the mapTable.

valueMapping

protected JavaTypeMapping valueMapping

Mapping to the value from the mapTable.

keyType

protected String keyType

Type of the key.

valueType

protected String valueType

Type of the value.

keysAreEmbedded

protected boolean keysAreEmbedded

Whether the keys are embedded.

keysAreSerialised

protected boolean keysAreSerialised

Whether the keys are serialised.

valuesAreEmbedded

protected boolean valuesAreEmbedded

Whether the values are embedded.

valuesAreSerialised

protected boolean valuesAreSerialised

Whether the values are serialised.

Constructor Detail

AbstractMapStore

public AbstractMapStore(RDBMSStoreManager storeMgr,
                        org.datanucleus.ClassLoaderResolver clr)

Method Detail

initialise

protected void initialise()

Method to initialise the statements being used. Subclasses should override the getXXXStmt() if they want to use an alternative statement.

keysAreEmbedded

public boolean keysAreEmbedded()

Accessor for whether the keys are embedded or not. If they are PC instances then returns false;

Specified by:

keysAreEmbedded in interface org.datanucleus.store.scostore.MapStore<K,V>

Returns:

Whether the keys are embedded

keysAreSerialised

public boolean keysAreSerialised()

Accessor for whether the keys are serialised or not. If they are PC instances then returns false;

Specified by:

keysAreSerialised in interface org.datanucleus.store.scostore.MapStore<K,V>

Returns:

Whether the keys are serialised

valuesAreEmbedded

public boolean valuesAreEmbedded()

Accessor for whether the values are embedded or not. If they are PC instances then returns false;

Specified by:

valuesAreEmbedded in interface org.datanucleus.store.scostore.MapStore<K,V>

Returns:

Whether the values are embedded

valuesAreSerialised

public boolean valuesAreSerialised()

Accessor for whether the values are serialised or not. If they are PC instances then returns false;

Specified by:

valuesAreSerialised in interface org.datanucleus.store.scostore.MapStore<K,V>

Returns:

Whether the values are serialised

containsKey

public boolean containsKey(org.datanucleus.state.ObjectProvider op,
                           Object key)

Method to check if a key exists in the Map.

Specified by:

containsKey in interface org.datanucleus.store.scostore.MapStore<K,V>

Parameters:

op - ObjectProvider for the map

key - The key to check for.

Returns:

Whether the key exists in the Map.

containsValue

public boolean containsValue(org.datanucleus.state.ObjectProvider op,
                             Object value)

Method to check if a value exists in the Map.

Specified by:

containsValue in interface org.datanucleus.store.scostore.MapStore<K,V>

Parameters:

op - ObjectProvider for the map

value - The value to check for.

Returns:

Whether the value exists in the Map.

get

public V get(org.datanucleus.state.ObjectProvider op,
             Object key)

Method to return the value for a key.

Specified by:

get in interface org.datanucleus.store.scostore.MapStore<K,V>

Parameters:

op - ObjectProvider for the Map.

key - The key of the object to retrieve.

Returns:

The value for this key.

putAll

public void putAll(org.datanucleus.state.ObjectProvider op,
                   Map<? extends K,? extends V> m)

Method to put all elements from a Map into our Map.

Specified by:

putAll in interface org.datanucleus.store.scostore.MapStore<K,V>

Parameters:

op - ObjectProvider for the Map

m - The Map to add

validateKeyType

protected void validateKeyType(org.datanucleus.ClassLoaderResolver clr,
                               Object key)

Utility to validate the type of a key for storing in the Map.

Parameters:

clr - The ClassLoaderResolver

key - The key to check.

validateValueType

protected void validateValueType(org.datanucleus.ClassLoaderResolver clr,
                                 Object value)

Utility to validate the type of a value for storing in the Map.

Parameters:

clr - The ClassLoaderResolver

value - The value to check.

validateKeyForReading

protected boolean validateKeyForReading(org.datanucleus.state.ObjectProvider op,
                                        Object key)

Utility to validate a key is ok for reading.

Parameters:

op - ObjectProvider for the map.

key - The key to check.

Returns:

Whether it is validated.

validateValueForReading

protected boolean validateValueForReading(org.datanucleus.state.ObjectProvider op,
                                          Object value)

Utility to validate a value is ok for reading.

Parameters:

op - ObjectProvider for the map.

value - The value to check.

Returns:

Whether it is validated.

validateKeyForWriting

protected void validateKeyForWriting(org.datanucleus.state.ObjectProvider ownerOP,
                                     Object key)

Utility to validate a key is ok for writing (present in the datastore).

Parameters:

ownerOP - ObjectProvider for the owner of the map

key - The key to check.

validateValueForWriting

protected void validateValueForWriting(org.datanucleus.state.ObjectProvider ownerOP,
                                       Object value)

Utility to validate a value is ok for writing (present in the datastore).

Parameters:

ownerOP - ObjectProvider for the owner of the map

value - The value to check.

getValue

protected abstract V getValue(org.datanucleus.state.ObjectProvider op,
                              Object key)
                       throws NoSuchElementException

Method to retrieve a value from the Map given the key.

Parameters:

op - ObjectProvider for the map.

key - The key to retrieve the value for.

Returns:

The value for this key

Throws:

NoSuchElementException - if the value for the key was not found

updateEmbeddedKey

public boolean updateEmbeddedKey(org.datanucleus.state.ObjectProvider op,
                                 Object key,
                                 int fieldNumber,
                                 Object newValue)

Method to update a field of an embedded key.

Specified by:

updateEmbeddedKey in interface org.datanucleus.store.scostore.MapStore<K,V>

Parameters:

op - ObjectProvider of the owner

key - The key to update

fieldNumber - The number of the field to update

newValue - The new value

updateEmbeddedValue

public boolean updateEmbeddedValue(org.datanucleus.state.ObjectProvider op,
                                   Object value,
                                   int fieldNumber,
                                   Object newValue)

Method to update a field of an embedded key.

Specified by:

updateEmbeddedValue in interface org.datanucleus.store.scostore.MapStore<K,V>

Parameters:

op - ObjectProvider of the owner

value - The value to update

fieldNumber - The number of the field to update

newValue - The new value

getValueMapping

public JavaTypeMapping getValueMapping()

getKeyMapping

public JavaTypeMapping getKeyMapping()

isValuesAreEmbedded

public boolean isValuesAreEmbedded()

isValuesAreSerialised

public boolean isValuesAreSerialised()

getMapTable

public Table getMapTable()

getKmd

public org.datanucleus.metadata.AbstractClassMetaData getKmd()

getVmd

public org.datanucleus.metadata.AbstractClassMetaData getVmd()

updateEmbeddedValue

public boolean updateEmbeddedValue(org.datanucleus.state.ObjectProvider op,
                                   Object value,
                                   int fieldNumber,
                                   Object newValue,
                                   JavaTypeMapping fieldMapping)

getUpdateEmbeddedKeyStmt

protected String getUpdateEmbeddedKeyStmt(JavaTypeMapping fieldMapping,
                                          JavaTypeMapping ownerMapping,
                                          JavaTypeMapping keyMapping,
                                          Table mapTable)

Generate statement for update the field of an embedded key.

 UPDATE MAPTABLE
 SET EMBEDDEDKEYCOL1 = ?
 WHERE OWNERCOL=?
 AND EMBEDDEDKEYCOL1 = ?
 AND EMBEDDEDKEYCOL2 = ? ...
 

Parameters:

fieldMapping - The mapping for the field to be updated

ownerMapping - The owner mapping

keyMapping - The key mapping

mapTable - The map table

Returns:

Statement for updating an embedded key in the Set

getUpdateEmbeddedValueStmt

protected String getUpdateEmbeddedValueStmt(JavaTypeMapping fieldMapping,
                                            JavaTypeMapping ownerMapping,
                                            JavaTypeMapping valueMapping,
                                            Table mapTable)

Generate statement for update the field of an embedded value.

 UPDATE MAPTABLE
 SET EMBEDDEDVALUECOL1 = ?
 WHERE OWNERCOL=?
 AND EMBEDDEDVALUECOL1 = ?
 AND EMBEDDEDVALUECOL2 = ? ...
 

Parameters:

fieldMapping - The mapping for the field to be updated

ownerMapping - The owner mapping

valueMapping - mapping for the value

mapTable - The map table

Returns:

Statement for updating an embedded value in the Set

updatedEmbeddedKey

public boolean updatedEmbeddedKey(org.datanucleus.state.ObjectProvider op,
                                  Object key,
                                  int fieldNumber,
                                  Object newValue,
                                  JavaTypeMapping fieldMapping)