DerbyPkGenerator (cayenne-doc: Cayenne Documentation 4.2 API)

java.lang.Object
- org.apache.cayenne.dba.JdbcPkGenerator
- - org.apache.cayenne.dba.oracle.OraclePkGenerator
  - - org.apache.cayenne.dba.derby.DerbyPkGenerator

All Implemented Interfaces:

PkGenerator
```
public class DerbyPkGenerator
extends OraclePkGenerator
```
PK generator for Derby that uses sequences.

Since:

4.0 (old one used AUTO_PK_SUPPORT table)

Field Summary
- Fields inherited from class org.apache.cayenne.dba.JdbcPkGenerator
  adapter, DEFAULT_PK_CACHE_SIZE, pkCache, pkCacheSize, pkStartValue

Constructor Summary

Constructors
Constructor Description

DerbyPkGenerator()
Used by DI

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected String`	`createSequenceString(DbEntity entity)`
`protected String`	`dropSequenceString(DbEntity entity)`	Returns a SQL string needed to drop any database objects associated with automatic primary key generation process for a specific DbEntity.
`protected String`	`selectAllSequencesQuery()`
`protected String`	`selectNextValQuery(String pkGeneratingSequenceName)`
`protected String`	`sequenceName(DbEntity entity)`	Returns expected primary key sequence name for a DbEntity.

Methods inherited from class org.apache.cayenne.dba.oracle.OraclePkGenerator
createAutoPk, createAutoPkStatements, dropAutoPk, dropAutoPkStatements, getExistingSequences, getSequencePrefix, longPkFromDatabase, pkCacheSize

Methods inherited from class org.apache.cayenne.dba.JdbcPkGenerator
autoPkTableExists, dropAutoPkString, generatePk, getAdapter, getPkCacheSize, pkCreateString, pkDeleteString, pkSelectString, pkTableCreateString, pkUpdateString, reset, runUpdate, setAdapter, setPkCacheSize

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DerbyPkGenerator
```
public DerbyPkGenerator()
```
    Used by DI
    
    Since:
    
    4.1
- Method Detail
  - sequenceName
```
protected String sequenceName(DbEntity entity)
```
    Description copied from class: OraclePkGenerator
    
    Returns expected primary key sequence name for a DbEntity.
    
    Overrides:
    
    sequenceName in class OraclePkGenerator
  - selectNextValQuery
```
protected String selectNextValQuery(String pkGeneratingSequenceName)
```
    Overrides:
    
    selectNextValQuery in class OraclePkGenerator
  - selectAllSequencesQuery
```
protected String selectAllSequencesQuery()
```
    Overrides:
    
    selectAllSequencesQuery in class OraclePkGenerator
  - dropSequenceString
```
protected String dropSequenceString(DbEntity entity)
```
    Description copied from class: OraclePkGenerator
    
    Returns a SQL string needed to drop any database objects associated with automatic primary key generation process for a specific DbEntity.
    
    Overrides:
    
    dropSequenceString in class OraclePkGenerator
  - createSequenceString
```
protected String createSequenceString(DbEntity entity)
```
    Overrides:
    
    createSequenceString in class OraclePkGenerator