StandardSequence (EclipseLink 2.6.2, API Reference)

java.lang.Object
- org.eclipse.persistence.sequencing.Sequence
- - org.eclipse.persistence.sequencing.StandardSequence

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

QuerySequence
```
public abstract class StandardSequence
extends Sequence
```
Purpose: An abstract class providing default sequence behavior.

See Also:
Serialized Form

Field Summary
- Fields inherited from class org.eclipse.persistence.sequencing.Sequence
  depth, initialValue, isCustomQualifier, name, platform, qualifier, shouldAlwaysOverrideExistingValue, size

Constructor Summary

Constructors
Constructor and Description
`StandardSequence()`
`StandardSequence(java.lang.String name)`
`StandardSequence(java.lang.String name, int size)`
`StandardSequence(java.lang.String name, int size, int initialValue)`

Method Summary

Methods
Modifier and Type	Method and Description
`protected java.util.Vector`	`createVector(java.lang.Number sequence, java.lang.String seqName, int size)` INTERNAL: given sequence = 10, size = 5 will create Vector (6,7,8,9,10)
`java.lang.Object`	`getGeneratedValue(org.eclipse.persistence.internal.databaseaccess.Accessor accessor, org.eclipse.persistence.internal.sessions.AbstractSession writeSession, java.lang.String seqName)` INTERNAL: Return the newly-generated sequencing value.
`java.util.Vector`	`getGeneratedVector(org.eclipse.persistence.internal.databaseaccess.Accessor accessor, org.eclipse.persistence.internal.sessions.AbstractSession writeSession, java.lang.String seqName, int size)` INTERNAL: Return a Vector of newly-generated sequencing values.
`void`	`onConnect()` INTERNAL: This method is called when Sequencing object is created.
`void`	`onDisconnect()` INTERNAL: This method is called when Sequencing object is destroyed.
`void`	`setInitialValue(int initialValue)`
`abstract boolean`	`shouldAcquireValueAfterInsert()` INTERNAL: Indicates whether sequencing value should be acquired after INSERT.
`abstract boolean`	`shouldUseTransaction()` INTERNAL: Indicates whether TopLink should internally call beginTransaction() before getGeneratedValue/Vector, and commitTransaction after.
`protected abstract java.lang.Number`	`updateAndSelectSequence(org.eclipse.persistence.internal.databaseaccess.Accessor accessor, org.eclipse.persistence.internal.sessions.AbstractSession writeSession, java.lang.String seqName, int size)`

Methods inherited from class org.eclipse.persistence.sequencing.Sequence
clone, equalNameAndSize, equals, getDatasourcePlatform, getGeneratedValue, getGeneratedVector, getInitialValue, getName, getPreallocationSize, getQualified, getQualifier, isConnected, isCustomQualifier, isNative, isTable, isUnaryTable, onConnect, onDisconnect, setDatasourcePlatform, setName, setPreallocationSize, setQualifier, setShouldAlwaysOverrideExistingValue, shouldAlwaysOverrideExistingValue, shouldAlwaysOverrideExistingValue, shouldUsePreallocation, toString, verifyPlatform

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

- Constructor Detail
  - StandardSequence
```
public StandardSequence()
```
  - StandardSequence
```
public StandardSequence(java.lang.String name)
```
  - StandardSequence
```
public StandardSequence(java.lang.String name,
                int size)
```
  - StandardSequence
```
public StandardSequence(java.lang.String name,
                int size,
                int initialValue)
```
- Method Detail
  - onConnect
```
public void onConnect()
```
    Description copied from class: Sequence
    
    INTERNAL: This method is called when Sequencing object is created. If it requires initialization, subclass should override this method.
    
    Specified by:
    
    onConnect in class Sequence
  - onDisconnect
```
public void onDisconnect()
```
    Description copied from class: Sequence
    
    INTERNAL: This method is called when Sequencing object is destroyed. If it requires deinitialization, subclass should override this method.
    
    Specified by:
    
    onDisconnect in class Sequence
  - updateAndSelectSequence
```
protected abstract java.lang.Number updateAndSelectSequence(org.eclipse.persistence.internal.databaseaccess.Accessor accessor,
                                       org.eclipse.persistence.internal.sessions.AbstractSession writeSession,
                                       java.lang.String seqName,
                                       int size)
```
  - shouldAcquireValueAfterInsert
```
public abstract boolean shouldAcquireValueAfterInsert()
```
    Description copied from class: Sequence
    
    INTERNAL: Indicates whether sequencing value should be acquired after INSERT. Note that preallocation could be used only in case sequencing values should be acquired before insert (this method returns false). In default implementation, it is true for table sequencing and native sequencing on Oracle platform, false for native sequencing on other platforms.
    
    Specified by:
    
    shouldAcquireValueAfterInsert in class Sequence
  - shouldUseTransaction
```
public abstract boolean shouldUseTransaction()
```
    Description copied from class: Sequence
    
    INTERNAL: Indicates whether TopLink should internally call beginTransaction() before getGeneratedValue/Vector, and commitTransaction after. In default implementation, it is true for table sequencing and false for native sequencing.
    
    Specified by:
    
    shouldUseTransaction in class Sequence
  - getGeneratedValue
```
public java.lang.Object getGeneratedValue(org.eclipse.persistence.internal.databaseaccess.Accessor accessor,
                                 org.eclipse.persistence.internal.sessions.AbstractSession writeSession,
                                 java.lang.String seqName)
```
    Description copied from class: Sequence
    
    INTERNAL: Return the newly-generated sequencing value. Used only in case preallocation is not used (shouldUsePreallocation()==false). Accessor may be non-null only in case shouldUseSeparateConnection()==true. Even in this case accessor could be null - if SequencingControl().shouldUseSeparateConnection()==false; Therefore in case shouldUseSeparateConnection()==true, implementation should handle both cases: use a separate connection if provided (accessor != null), or get by without it (accessor == null).
    
    Specified by:
    
    getGeneratedValue in class Sequence
    
    Parameters:
    accessor - Accessor is a separate sequencing accessor (may be null);
    writeSession - Session is a Session used for writing (either ClientSession or DatabaseSession);
    seqName - String is sequencing number field name
  - getGeneratedVector
```
public java.util.Vector getGeneratedVector(org.eclipse.persistence.internal.databaseaccess.Accessor accessor,
                                  org.eclipse.persistence.internal.sessions.AbstractSession writeSession,
                                  java.lang.String seqName,
                                  int size)
```
    Description copied from class: Sequence
    
    INTERNAL: Return a Vector of newly-generated sequencing values. Used only in case preallocation is used (shouldUsePreallocation()==true). Accessor may be non-null only in case shouldUseSeparateConnection()==true. Even in this case accessor could be null - if SequencingControl().shouldUseSeparateConnection()==false; Therefore in case shouldUseSeparateConnection()==true, implementation should handle both cases: use a separate connection if provided (accessor != null), or get by without it (accessor == null).
    
    Specified by:
    
    getGeneratedVector in class Sequence
    
    Parameters:
    accessor - Accessor is a separate sequencing accessor (may be null);
    writeSession - Session is a Session used for writing (either ClientSession or DatabaseSession);
    seqName - String is sequencing number field name
    size - int number of values to preallocate (output Vector size).
  - createVector
```
protected java.util.Vector createVector(java.lang.Number sequence,
                            java.lang.String seqName,
                            int size)
```
    INTERNAL: given sequence = 10, size = 5 will create Vector (6,7,8,9,10)
    
    Parameters:
    seqName - String is sequencing number field name
    size - int size of Vector to create.
  - setInitialValue
```
public void setInitialValue(int initialValue)
```
    Overrides:
    
    setInitialValue in class Sequence

Class StandardSequence

Field Summary

Fields inherited from class org.eclipse.persistence.sequencing.Sequence

Constructor Summary

Method Summary

Methods inherited from class org.eclipse.persistence.sequencing.Sequence

Methods inherited from class java.lang.Object

Constructor Detail

StandardSequence

StandardSequence

StandardSequence

StandardSequence

Method Detail

onConnect

onDisconnect

updateAndSelectSequence

shouldAcquireValueAfterInsert

shouldUseTransaction

getGeneratedValue

getGeneratedVector

createVector

setInitialValue