Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> store >> raw >> [ data overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

org.apache.derby.impl.store.raw.data
Class ContainerHandleActionOnCommit  

java.lang.Object
  org.apache.derby.impl.store.raw.data.ContainerActionOnCommit
      org.apache.derby.impl.store.raw.data.ContainerHandleActionOnCommit

All Implemented Interfaces:

java.util.Observer

Direct Known Subclasses:

SyncOnCommit, TruncateOnCommit

---

public abstract class ContainerHandleActionOnCommit

extends ContainerActionOnCommit

An abstract class that opens the container at commit and delegates the actual work to a sub-class.

---

Field Summary
protected  org.apache.derby.iapi.store.raw.ContainerKey	identity

 

Constructor Summary

ContainerHandleActionOnCommit(org.apache.derby.iapi.store.raw.ContainerKey identity)

 

Method Summary
protected abstract  void	doIt(BaseContainerHandle handle)
boolean	equals(java.lang.Object other)           An equals method that returns true if the other obejct is a sub-class of this, and the container identities are equal *and* it is the same class as this.
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
void	openContainerAndDoIt(org.apache.derby.iapi.store.raw.xact.RawTransaction xact)           Open the container and call the doIt method

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface java.util.Observer

update

 

Field Detail

identity

protected org.apache.derby.iapi.store.raw.ContainerKey identity

Constructor Detail

ContainerHandleActionOnCommit

public ContainerHandleActionOnCommit(org.apache.derby.iapi.store.raw.ContainerKey identity)

Method Detail

openContainerAndDoIt

public void openContainerAndDoIt(org.apache.derby.iapi.store.raw.xact.RawTransaction xact)

Open the container and call the doIt method

---

doIt

protected abstract void doIt(BaseContainerHandle handle)
                      throws org.apache.derby.iapi.error.StandardException

---

hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

• Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
• It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

---

equals

public boolean equals(java.lang.Object other)

An equals method that returns true if the other obejct is a sub-class of this, and the container identities are equal *and* it is the same class as this.
This allows mutiple additions of value equality obejcts to the observer list while only retaining one.

---

Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> store >> raw >> [ data overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---