org.mmbase.storage.implementation.database

Class ViewDatabaseStorageManager

java.lang.Object

org.mmbase.storage.implementation.database.DatabaseStorageManager

org.mmbase.storage.implementation.database.ViewDatabaseStorageManager

All Implemented Interfaces:

StorageManager<DatabaseStorageManagerFactory>

public class ViewDatabaseStorageManager
extends DatabaseStorageManager

A View database storage manager creates tables without the fields of the 'super' tables and views to represent the combined table.

Since:

MMBase-1.8

Version:

$Id$

Author:

Nico Klasens (?)

Nested Class Summary

Nested classes/interfaces inherited from class org.mmbase.storage.implementation.database.DatabaseStorageManager

DatabaseStorageManager.InputStreamBlob

Field Summary

Fields inherited from class org.mmbase.storage.implementation.database.DatabaseStorageManager

activeConnection, changes, factory, inTransaction, OBJ2TYPE_MAX_SIZE, sequenceKeys, transactionIsolation, typeCache

Constructor Summary

Constructors

Constructor and Description
ViewDatabaseStorageManager()

Method Summary

Modifier and Type	Method and Description
void	change(MMObjectNode node, MMObjectBuilder builder) Changes a node in the passed builder and all its parent builders
void	create() Create the basic elements for this storage
protected void	create(Index index) Override the default version.
void	create(MMObjectBuilder builder) Create a storage element to store the specified builder's objects.
void	create(MMObjectNode node, MMObjectBuilder builder) This method inserts a new object in a specific builder, and registers the change.
protected void	createObject(MMObjectNode node, MMObjectBuilder builder) This method inserts a new object in a specific builder, and registers the change.
void	delete(MMObjectNode node, MMObjectBuilder builder) Deletes a node in the passed builder and all its parent builders.
boolean	exists() Determine if the basic storage elements exist Basic storage elements include the 'object' storage (where all objects and their types are registered).
protected boolean	exists(Index index) Determines if an index exists.
boolean	exists(MMObjectBuilder builder) Determine if a storage element exists for storing the given builder's objects
protected String	getFieldName(CoreField field)
protected CoreField	getNumberField()
protected String	getTableName(MMObjectBuilder builder)
protected String	getTableName(String viewname)
protected String	getViewName(MMObjectBuilder builder)
protected String	getViewName(String viewname)
protected boolean	isInheritedField(CoreField field)
protected boolean	useDatabaseInheritance() Whether during the table verification also metaData.getSuperTables must be used to obtain the fields in the parent builder.
void	verify(MMObjectBuilder builder) Tests whether a builder and the table present in the database match.
protected boolean	viewCreate(MMObjectBuilder builder)
protected boolean	viewExists(MMObjectBuilder builder)

Methods inherited from class org.mmbase.storage.implementation.database.DatabaseStorageManager

addToTableNameCache, appendDirectory, appendField, beginTransaction, change, change, change, change, checkFile, commit, commitChange, compareIndex, convertLegacyBinaryFiles, create, create, create, createIndex, createIndices, createKey, createSequence, createTable, delete, delete, delete, delete, delete, deleteIndices, executeQuery, executeUpdate, executeUpdateCheckConnection, exists, exists, fillNode, getActiveConnection, getBinaryFile, getBinaryValue, getBlobFromDatabase, getBlobValue, getBlobValue, getBlobValue, getBooleanValue, getConstraintDefinition, getDateTimeValue, getFactory, getFieldDefinition, getFieldIndices, getFieldList, getFieldTypeDefinition, getInputStreamValue, getJDBCtoField, getLogStartTime, getMaxLengthForKey, getNode, getNodeType, getStringValue, getStringValue, getValue, getVersion, getXMLValue, init, isBinaryColumnType, isNull, isPartOfBuilderDefinition, isVerified, logQuery, readNode, refresh, releaseActiveConnection, rollback, setBinaryValue, setBooleanValue, setDateTimeValue, setDecimalValue, setListValue, setNodeType, setNodeTypeLeaveRelations, setNodeTypeRememberRelations, setNodeValue, setNullValue, setNumericValue, setStringValue, setValue, setXMLValue, shorten, size, size, storeBinaryAsFile, tablesInheritFields, unloadShortedFields, verifyTables

Methods inherited from class java.lang.Object

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

Constructor Detail

ViewDatabaseStorageManager

public ViewDatabaseStorageManager()

Method Detail

useDatabaseInheritance

protected boolean useDatabaseInheritance()

Description copied from class: DatabaseStorageManager

Whether during the table verification also metaData.getSuperTables must be used to obtain the fields in the parent builder.

Overrides:

useDatabaseInheritance in class DatabaseStorageManager

exists

public boolean exists()
               throws StorageException

Determine if the basic storage elements exist Basic storage elements include the 'object' storage (where all objects and their types are registered).

Specified by:

exists in interface StorageManager<DatabaseStorageManagerFactory>

Overrides:

exists in class DatabaseStorageManager

Returns:

true if basic storage elements exist

Throws:

StorageException - if an error occurred while querying the storage

exists

public boolean exists(MMObjectBuilder builder)
               throws StorageException

Determine if a storage element exists for storing the given builder's objects

Specified by:

exists in interface StorageManager<DatabaseStorageManagerFactory>

Overrides:

exists in class DatabaseStorageManager

Parameters:

builder - the builder to check

Returns:

true if the storage element exists, false if it doesn't

Throws:

StorageException - if an error occurred while querying the storage

create

public void create()
            throws StorageException

Create the basic elements for this storage

Specified by:

create in interface StorageManager<DatabaseStorageManagerFactory>

Overrides:

create in class DatabaseStorageManager

Throws:

StorageException - if an error occurred during the creation of the object storage

create

public void create(MMObjectBuilder builder)
            throws StorageException

Create a storage element to store the specified builder's objects.

Specified by:

create in interface StorageManager<DatabaseStorageManagerFactory>

Overrides:

create in class DatabaseStorageManager

Parameters:

builder - the builder to create the storage element for

Throws:

StorageException - if an error occurred during the creation of the storage element

See Also:

StorageManager.create(org.mmbase.module.core.MMObjectBuilder)

create

public void create(MMObjectNode node,
                   MMObjectBuilder builder)
            throws StorageException

Description copied from class: DatabaseStorageManager

This method inserts a new object in a specific builder, and registers the change. This method makes it easier to implement relational databases, where you may need to update the node in more than one builder. Call this method for all involved builders if you use a relational database.

Overrides:

create in class DatabaseStorageManager

Parameters:

node - The node to insert. The node already needs to have a (new) number assigned

builder - the builder to store the node

Throws:

StorageException - if an error occurred during creation

createObject

protected void createObject(MMObjectNode node,
                            MMObjectBuilder builder)
                     throws StorageException

This method inserts a new object in a specific builder, and registers the change. This method makes it easier to implement relational databases, where you may need to update the node in more than one builder. Call this method for all involved builders if you use a relational database.

Parameters:

node - The node to insert. The node already needs to have a (new) number assigned

builder - the builder to store the node

Throws:

StorageException - if an error occurred during creation

change

public void change(MMObjectNode node,
                   MMObjectBuilder builder)
            throws StorageException

Changes a node in the passed builder and all its parent builders

Overrides:

change in class DatabaseStorageManager

Parameters:

node - The node to change

builder - the builder to change the node in

Throws:

StorageException - if an error occurred during change

delete

public void delete(MMObjectNode node,
                   MMObjectBuilder builder)
            throws StorageException

Deletes a node in the passed builder and all its parent builders.

Overrides:

delete in class DatabaseStorageManager

Parameters:

node - The node to delete

builder - the builder to delete the node in

Throws:

StorageException - if an error occurred during delete

getFieldName

protected String getFieldName(CoreField field)

isInheritedField

protected boolean isInheritedField(CoreField field)

getNumberField

protected CoreField getNumberField()

getTableName

protected String getTableName(MMObjectBuilder builder)

getTableName

protected String getTableName(String viewname)

getViewName

protected String getViewName(MMObjectBuilder builder)

getViewName

protected String getViewName(String viewname)

create

protected void create(Index index)
               throws StorageException

Override the default version. An index should only be created if all the fields are in this builder. Otherwise this will fail horrably.

Overrides:

create in class DatabaseStorageManager

Parameters:

index - the index to create

Throws:

StorageException

exists

protected boolean exists(Index index)
                  throws StorageException

Description copied from class: DatabaseStorageManager

Determines if an index exists. You should have an active connection before calling this method.

Overrides:

exists in class DatabaseStorageManager

Parameters:

index - the index to test

Throws:

StorageException - when a database error occurs

viewExists

protected boolean viewExists(MMObjectBuilder builder)

viewCreate

protected boolean viewCreate(MMObjectBuilder builder)

verify

public void verify(MMObjectBuilder builder)
            throws StorageException

Description copied from class: DatabaseStorageManager

Tests whether a builder and the table present in the database match.

Overrides:

verify in class DatabaseStorageManager

Throws:

StorageException