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java.lang.Objectorg.apache.cayenne.dba.JdbcAdapter
public class JdbcAdapter
A generic DbAdapter implementation. Can be used as a default adapter or as a superclass of a concrete adapter implementation.
Field Summary | |
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protected ExtendedTypeMap |
extendedTypes
|
protected PkGenerator |
pkGenerator
|
protected boolean |
supportsBatchUpdates
|
protected boolean |
supportsFkConstraints
|
protected boolean |
supportsGeneratedKeys
|
protected boolean |
supportsUniqueConstraints
|
protected TypesHandler |
typesHandler
|
Constructor Summary | |
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JdbcAdapter()
Creates new JdbcAdapter with a set of default parameters. |
Method Summary | |
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void |
bindParameter(PreparedStatement statement,
Object object,
int pos,
int sqlType,
int scale)
Binds an object value to PreparedStatement's numbered parameter. |
DbAttribute |
buildAttribute(String name,
String typeName,
int type,
int size,
int scale,
boolean allowNulls)
Creates and returns a DbAttribute based on supplied parameters (usually obtained from database meta data). |
protected void |
configureExtendedTypes(ExtendedTypeMap map)
Installs appropriate ExtendedTypes as converters for passing values between JDBC and Java layers. |
String |
createFkConstraint(DbRelationship rel)
Returns a SQL string that can be used to create a foreign key constraint for the relationship. |
protected PkGenerator |
createPkGenerator()
Creates and returns a primary key generator. |
String |
createTable(DbEntity entity)
Returns a SQL string that can be used to create database table corresponding to ent parameter. |
protected void |
createTableAppendColumn(StringBuffer sqlBuffer,
DbAttribute column)
Appends SQL for column creation to CREATE TABLE buffer. |
protected void |
createTableAppendPKClause(StringBuffer sqlBuffer,
DbEntity entity)
|
String |
createUniqueConstraint(DbEntity source,
Collection columns)
Returns a DDL string to create a unique constraint over a set of columns. |
String |
dropTable(DbEntity ent)
Returns a SQL string to drop a table corresponding to ent DbEntity. |
String[] |
externalTypesForJdbcType(int type)
Returns an array of RDBMS types that can be used with JDBC type . |
URL |
findAdapterResource(String name)
Locates and returns a named adapter resource. |
SQLAction |
getAction(Query query,
DataNode node)
Uses JdbcActionBuilder to create the right action. |
String |
getBatchTerminator()
Returns default separator - a semicolon. |
ExtendedTypeMap |
getExtendedTypes()
Returns a map of ExtendedTypes that is used to translate values between Java and JDBC layer. |
PkGenerator |
getPkGenerator()
Returns primary key generator associated with this DbAdapter. |
QualifierTranslator |
getQualifierTranslator(QueryAssembler queryAssembler)
Creates and returns a default implementation of a qualifier translator. |
void |
setPkGenerator(PkGenerator pkGenerator)
Sets new primary key generator. |
void |
setSupportsBatchUpdates(boolean flag)
|
void |
setSupportsFkConstraints(boolean flag)
|
void |
setSupportsGeneratedKeys(boolean flag)
|
void |
setSupportsUniqueConstraints(boolean flag)
|
boolean |
supportsBatchUpdates()
Returns true if the target database supports batch updates. |
boolean |
supportsFkConstraints()
Returns true. |
boolean |
supportsGeneratedKeys()
Returns true if a target database supports key autogeneration. |
boolean |
supportsUniqueConstraints()
Returns true. |
String |
tableTypeForTable()
Returns the name of the table type (as returned by DatabaseMetaData.getTableTypes ) for a simple user table. |
String |
tableTypeForView()
Returns the name of the table type (as returned by DatabaseMetaData.getTableTypes ) for a view table. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
protected PkGenerator pkGenerator
protected TypesHandler typesHandler
protected ExtendedTypeMap extendedTypes
protected boolean supportsBatchUpdates
protected boolean supportsFkConstraints
protected boolean supportsUniqueConstraints
protected boolean supportsGeneratedKeys
Constructor Detail |
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public JdbcAdapter()
Method Detail |
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public String getBatchTerminator()
getBatchTerminator
in interface DbAdapter
public URL findAdapterResource(String name)
This implementation is based on the premise that each adapter is located in its own Java package and all resources are in the same package as well. Resource lookup is recursive, so that if DbAdapter is a subclass of another adapter, parent adapter package is searched as a failover.
protected void configureExtendedTypes(ExtendedTypeMap map)
protected PkGenerator createPkGenerator()
public PkGenerator getPkGenerator()
getPkGenerator
in interface DbAdapter
public void setPkGenerator(PkGenerator pkGenerator)
public boolean supportsFkConstraints()
supportsFkConstraints
in interface DbAdapter
public void setSupportsFkConstraints(boolean flag)
public boolean supportsUniqueConstraints()
supportsUniqueConstraints
in interface DbAdapter
public void setSupportsUniqueConstraints(boolean flag)
public String dropTable(DbEntity ent)
ent
DbEntity.
dropTable
in interface DbAdapter
public String createTable(DbEntity entity)
ent
parameter.
createTable
in interface DbAdapter
protected void createTableAppendPKClause(StringBuffer sqlBuffer, DbEntity entity)
protected void createTableAppendColumn(StringBuffer sqlBuffer, DbAttribute column)
public String createUniqueConstraint(DbEntity source, Collection columns)
createUniqueConstraint
in interface DbAdapter
public String createFkConstraint(DbRelationship rel)
createFkConstraint
in interface DbAdapter
public String[] externalTypesForJdbcType(int type)
DbAdapter
type
.
Valid JDBC types are defined in java.sql.Types.
externalTypesForJdbcType
in interface DbAdapter
public ExtendedTypeMap getExtendedTypes()
DbAdapter
getExtendedTypes
in interface DbAdapter
ExtendedType
public DbAttribute buildAttribute(String name, String typeName, int type, int size, int scale, boolean allowNulls)
DbAdapter
buildAttribute
in interface DbAdapter
name
- database column nametypeName
- database specific type name, may be used as a hint to determine the
right JDBC type.type
- JDBC column typesize
- database column size (ignored if less than zero)scale
- database column scale, i.e. the number of decimal digits (ignored if
less than zero)allowNulls
- database column nullable parameterpublic String tableTypeForTable()
DbAdapter
DatabaseMetaData.getTableTypes
) for a simple user table.
tableTypeForTable
in interface DbAdapter
public String tableTypeForView()
DbAdapter
DatabaseMetaData.getTableTypes
) for a view table.
tableTypeForView
in interface DbAdapter
public QualifierTranslator getQualifierTranslator(QueryAssembler queryAssembler)
getQualifierTranslator
in interface DbAdapter
public SQLAction getAction(Query query, DataNode node)
getAction
in interface DbAdapter
public void bindParameter(PreparedStatement statement, Object object, int pos, int sqlType, int scale) throws SQLException, Exception
DbAdapter
bindParameter
in interface DbAdapter
SQLException
Exception
public boolean supportsBatchUpdates()
DbAdapter
true
if the target database supports batch updates.
supportsBatchUpdates
in interface DbAdapter
public void setSupportsBatchUpdates(boolean flag)
public boolean supportsGeneratedKeys()
DbAdapter
supportsGeneratedKeys
in interface DbAdapter
public void setSupportsGeneratedKeys(boolean flag)
|
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