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java.lang.Objectorg.apache.cayenne.dba.JdbcPkGenerator
org.apache.cayenne.dba.db2.DB2PkGenerator
public class DB2PkGenerator
A sequence-based PK generator used by DB2Adapter
.
Field Summary | |
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static java.lang.String |
SEQUENCE_PREFIX
Deprecated. since 2.0 - other generators do not expose the default prefix. |
Fields inherited from class org.apache.cayenne.dba.JdbcPkGenerator |
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DEFAULT_PK_CACHE_SIZE, NEXT_ID, objDesc, pkCache, pkCacheSize, resultDesc |
Constructor Summary | |
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DB2PkGenerator()
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Method Summary | |
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void |
createAutoPk(DataNode node,
java.util.List dbEntities)
Generates necessary database objects to provide automatic primary key support. |
java.util.List |
createAutoPkStatements(java.util.List dbEntities)
Creates a list of CREATE SEQUENCE statements for the list of DbEntities. |
protected java.lang.String |
createSequenceString(DbEntity entity)
Returns CREATE SEQUENCE statement for entity. |
void |
dropAutoPk(DataNode node,
java.util.List dbEntities)
Drops PK sequences for all specified DbEntities. |
java.util.List |
dropAutoPkStatements(java.util.List dbEntities)
Creates a list of DROP SEQUENCE statements for the list of DbEntities. |
protected java.lang.String |
dropSequenceString(DbEntity entity)
Returns DROP SEQUENCE statement. |
protected java.util.List |
getExistingSequences(DataNode node)
Fetches a list of existing sequences that might match Cayenne generated ones. |
protected int |
pkFromDatabase(DataNode node,
DbEntity ent)
Performs primary key generation ignoring cache. |
protected java.lang.String |
sequenceName(DbEntity entity)
Returns default sequence name for DbEntity. |
Methods inherited from class org.apache.cayenne.dba.JdbcPkGenerator |
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autoPkTableExists, binaryPK, dropAutoPkString, generatePkForDbEntity, generatePkForDbEntityString, getPkCacheSize, pkCreateString, pkDeleteString, pkSelectString, pkTableCreateString, pkUpdateString, reset, runUpdate, setPkCacheSize |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final java.lang.String SEQUENCE_PREFIX
Constructor Detail |
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public DB2PkGenerator()
Method Detail |
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protected int pkFromDatabase(DataNode node, DbEntity ent) throws java.lang.Exception
JdbcPkGenerator
This method is called internally from "generatePkForDbEntity" and then generated range of key values is saved in cache for performance. Subclasses that implement different primary key generation solutions should override this method, not "generatePkForDbEntity".
pkFromDatabase
in class JdbcPkGenerator
java.lang.Exception
public void createAutoPk(DataNode node, java.util.List dbEntities) throws java.lang.Exception
PkGenerator
createAutoPk
in interface PkGenerator
createAutoPk
in class JdbcPkGenerator
node
- node that provides access to a DataSource.dbEntities
- a list of entities that require primary key autogeneration
support
java.lang.Exception
public java.util.List createAutoPkStatements(java.util.List dbEntities)
createAutoPkStatements
in interface PkGenerator
createAutoPkStatements
in class JdbcPkGenerator
public void dropAutoPk(DataNode node, java.util.List dbEntities) throws java.lang.Exception
dropAutoPk
in interface PkGenerator
dropAutoPk
in class JdbcPkGenerator
node
- node that provides access to a DataSource.dbEntities
- a list of entities whose primary key autogeneration support
should be dropped.
java.lang.Exception
public java.util.List dropAutoPkStatements(java.util.List dbEntities)
dropAutoPkStatements
in interface PkGenerator
dropAutoPkStatements
in class JdbcPkGenerator
protected java.util.List getExistingSequences(DataNode node) throws java.sql.SQLException
java.sql.SQLException
protected java.lang.String sequenceName(DbEntity entity)
protected java.lang.String dropSequenceString(DbEntity entity)
protected java.lang.String createSequenceString(DbEntity entity)
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