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/*
* LifeCycleState.java March 10, 2000 Steffi Rauschenbach
*/
package com.sun.jdo.spi.persistence.support.sqlstore.state;
import com.sun.jdo.api.persistence.support.JDOUserException;
import com.sun.jdo.spi.persistence.utility.I18NHelper;
import com.sun.jdo.spi.persistence.utility.logging.Logger;
import com.sun.jdo.spi.persistence.support.sqlstore.LogHelperStateManager;
import java.util.ResourceBundle;
public abstract class LifeCycleState {
/**
* I18N message handler
*/
protected final static ResourceBundle messages = I18NHelper.loadBundle(
"com.sun.jdo.spi.persistence.support.sqlstore.Bundle", // NOI18N
LifeCycleState.class.getClassLoader());
protected boolean isPersistent;
protected boolean isAutoPersistent;
protected boolean isPersistentInDataStore;
protected boolean isTransactional;
protected boolean isDirty;
protected boolean isNew;
protected boolean isDeleted;
protected boolean isFlushed;
protected boolean isNavigable;
protected boolean isRefreshable;
protected boolean isBeforeImageUpdatable;
// The following flags need to be checked after state transition.
protected boolean needsRegister;
// The following flags need to be checked before state transition.
protected boolean needsReload;
// The following flag determine whether the original state of the object
// needs to be restored on rollback (my depend on retainValues)
protected boolean needsRestoreOnRollback;
// The following flag states that merge is needed
protected boolean needMerge = true;
protected int updateAction;
protected int stateType;
/**
* Constants to specify database operation to be executed
*/
final static protected int
NO_OP = 0,
INSERT_OP = 1,
UPDATE_OP = 2,
DELETE_OP = 3;
/**
* Constants to specify the life cycle state type
*/
final static public int
HOLLOW = 0,
P_NON_TX = 1,
P_CLEAN = 2,
P_DIRTY = 3,
P_NEW = 4,
P_NEW_FLUSHED = 5,
P_NEW_FLUSHED_DELETED = 6,
P_NEW_DELETED = 7,
P_DELETED = 8,
P_DELETED_FLUSHED = 9,
AP_NEW = 10,
AP_NEW_PENDING = 11,
AP_NEW_FLUSHED = 12,
AP_NEW_FLUSHED_PENDING = 13,
AP_NEW_FLUSHED_DELETED = 14,
AP_NEW_DELETED = 15,
TRANSIENT = 16,
TOTAL = 17;
private static LifeCycleState stateTypes[];
//The logger
private static Logger logger = LogHelperStateManager.getLogger();
// ******************************************************************
// Initialisation stuff
// ******************************************************************
/**
* Static initialiser.
* Initialises the life cycle.
*/
static {
initLifeCycleState();
}
/**
* Initialises the objects. This class implements the "state pattern".
*/
// This method is called (through the static initializer)
// when the LifeCycleState class or any of its subclasses is loaded.
// It is extremely important that this method is called before any of isNew etc is called,
// and before stateType() is called !!!
protected static void initLifeCycleState() {
stateTypes = new LifeCycleState[TOTAL];
stateTypes[HOLLOW] = new Hollow();
stateTypes[P_NON_TX] = new PersistentNonTransactional();
stateTypes[P_CLEAN] = new PersistentClean();
stateTypes[P_DIRTY] = new PersistentDirty();
stateTypes[P_NEW] = new PersistentNew();
stateTypes[P_NEW_FLUSHED] = new PersistentNewFlushed();
stateTypes[P_NEW_DELETED] = new PersistentNewDeleted();
stateTypes[P_NEW_FLUSHED_DELETED] = new PersistentNewFlushedDeleted();
stateTypes[P_DELETED] = new PersistentDeleted();
stateTypes[P_DELETED_FLUSHED] = new PersistentDeletedFlushed();
stateTypes[AP_NEW] = new AutoPersistentNew();
stateTypes[AP_NEW_PENDING] = new AutoPersistentNewPending();
stateTypes[AP_NEW_FLUSHED] = new AutoPersistentNewFlushed();
stateTypes[AP_NEW_FLUSHED_PENDING] = new AutoPersistentNewFlushedPending();
stateTypes[AP_NEW_FLUSHED_DELETED] = new AutoPersistentNewFlushedDeleted();
stateTypes[AP_NEW_DELETED] = new AutoPersistentNewDeleted();
stateTypes[TRANSIENT] = null;
}
/**
* | Trans | PNew | PClean | PDirty | Hollow | PNewDel | PDel | PNonTx
*-----------------------------------------------------------------------------------
* makeP | PNew | unch. | unch. | unch. | unch. | unch. | unch. | unch.
*-----------------------------------------------------------------------------------
* delP | Error | PNewDel| PDel | PDel | PDel | unch. | unch. | PDel
*-----------------------------------------------------------------------------------
* readF.| unch. | unch. | unch. | unch. | PClean | Error | Error |!unl.:unch.
* opt=f | | | | | | | | unl.:PClean
*-----------------------------------------------------------------------------------
* readF.| unch. | unch. | unch. | unch. | PNonTx | Error | Error | unch.
* opt=t | | | | | | | |
*-----------------------------------------------------------------------------------
* writeF| unch. | unch. | PDirty | unch. | PDirty | Error | Error | PDirty
*-----------------------------------------------------------------------------------
* commit| unch. | Hollow | Hollow | Hollow | unch. | Trans | Trans | unch.
*-----------------------------------------------------------------------------------
* commit| unch. | PNonTx | PNonTx | PNonTx | unch. | Trans | Trans | unch.
* rt=t | | | | | | | |
*-----------------------------------------------------------------------------------
* rollb.| unch. | Trans | Hollow | Hollow | unch. | Trans | Hollow| unch.
*-----------------------------------------------------------------------------------
* rollb.| unch. | Trans | PNonTx | PNonTx | unch. | Trans | PNonTx| unch.
* rt=t | | | | | | | |
*-----------------------------------------------------------------------------------
* evict | n/a | n/a | Hollow | n/a | unch. | n/a | n/a | Hollow
*-----------------------------------------------------------------------------------
*/
/**
* Returns the LifeCycleState for the state constant.
*
* @param op the type as integer
* @return the type as LifeCycleState object
*/
public static LifeCycleState getLifeCycleState(int state) {
if (logger.isLoggable(Logger.FINER)) {
logger.finer("sqlstore.state.lifecyclestate.initial",stateTypes[state]); // NOI18N
}
return stateTypes[state];
}
/**
* Returns the type of the life cycle state
*
* @return the type of this life cycle state
*
*/
public int stateType() {
return stateType;
}
public LifeCycleState transitionMakePersistent() {
return this;
}
public LifeCycleState transitionDeletePersistent() {
return this;
}
public LifeCycleState transitionRefreshPersistent() {
return this;
}
public LifeCycleState transitionReload(boolean transactionActive) {
return this;
}
public LifeCycleState transitionCommit(boolean retainValues) {
return this;
}
public LifeCycleState transitionRollback(boolean retainValues) {
return this;
}
public LifeCycleState transitionFlushed() {
return this;
}
public LifeCycleState transitionMakePending() {
return this;
}
public LifeCycleState transitionReadField(boolean optimisitic,
boolean nontransactionalRead,
boolean transactionActive) {
if (!nontransactionalRead) {
assertTransaction(transactionActive);
}
return this;
}
public LifeCycleState transitionWriteField(boolean transactionActive) {
assertTransaction(transactionActive);
return this;
}
protected void assertTransaction(boolean transactionActive) {
if (!transactionActive) {
throw new JDOUserException(I18NHelper.getMessage(messages,
"jdo.lifecycle.xactnotactive")); // NOI18N
}
}
/***************************************************************/
/************** State interrogation methods ********************/
/***************************************************************/
/**
* Return whether the object is persistent.
*/
public boolean isPersistent() {
return isPersistent;
}
/**
* Return whether the object is auto-persistent.
*/
public boolean isAutoPersistent() {
return isAutoPersistent;
}
/**
* Return whether the object is persistent in data store.
*/
public boolean isPersistentInDataStore() {
return isPersistentInDataStore;
}
/**
* Return whether the object is transactional.
*/
public boolean isTransactional() {
return isTransactional;
}
/**
* Return whether the object is dirty, i.e. has been changed
* (created, updated, deleted) in this Tx.
*/
public boolean isDirty() {
return isDirty;
}
/**
* Return whether the object was newly created.
*/
public boolean isNew() {
return isNew;
}
/**
* Return whether the object is deleted.
*/
public boolean isDeleted() {
return isDeleted;
}
/**
* Return whether the object is registered with the persistence manager.
*/
public boolean needsRegister() {
return needsRegister;
}
/**
* Return whether the object can dynamically navigate to fields that are
* not present.
*/
public boolean isNavigable() {
return isNavigable;
}
/**
* Return whether the object can be refreshed from the database.
*/
public boolean isRefreshable() {
return isRefreshable;
}
public boolean isBeforeImageUpdatable() {
return isBeforeImageUpdatable;
}
public boolean needsReload(boolean optimistic,
boolean nontransactionalRead,
boolean transactionActive) {
return needsReload;
}
public boolean needsRestoreOnRollback(boolean retainValues) {
//
// The default behavior is if retainValues is true, we always
// restore the state. Otherwise, the behavior is determined
// by needsRetoreOnRollback.
//
if (retainValues) {
return true;
}
return needsRestoreOnRollback;
}
public boolean needMerge() {
return needMerge;
}
public int getUpdateAction() {
return updateAction;
}
/*************************************************************/
/********************* Helper methods ************************/
/********* Called only internally by life cycle classes ******/
/*************************************************************/
/**
* Life Cycle State change
*/
public LifeCycleState changeState(int newStateType) {
if (logger.isLoggable(Logger.FINER)) {
Object[] items = new Object[] {this,stateTypes[newStateType]};
logger.finer("sqlstore.state.lifecyclestate.changestate",items); // NOI18N
}
return (stateTypes[newStateType]);
}
public String toString() {
switch (stateType) {
case HOLLOW:
return "HOLLOW"; // NOI18N
case P_NON_TX:
return "P_NON_TX"; // NOI18N
case P_CLEAN:
return "P_CLEAN"; // NOI18N
case P_DIRTY:
return "P_DIRTY"; // NOI18N
case P_NEW:
return "P_NEW"; // NOI18N
case P_NEW_FLUSHED:
return "P_NEW_FLUSHED"; // NOI18N
case P_NEW_FLUSHED_DELETED:
return "P_NEW_FLUSHED_DELETED"; // NOI18N
case P_NEW_DELETED:
return "P_NEW_DELETED"; // NOI18N
case P_DELETED:
return "P_DELETED"; // NOI18N
case P_DELETED_FLUSHED:
return "P_DELETED_FLUSHED"; // NOI18N
case AP_NEW:
return "AP_NEW"; // NOI18N
case AP_NEW_PENDING:
return "AP_NEW_PENDING"; // NOI18N
case AP_NEW_FLUSHED:
return "AP_NEW_FLUSHED"; // NOI18N
case AP_NEW_FLUSHED_PENDING:
return "AP_NEW_FLUSHED_PENDING"; // NOI18N
case AP_NEW_FLUSHED_DELETED:
return "AP_NEW_FLUSHED_DELETED"; // NOI18N
case AP_NEW_DELETED:
return "AP_NEW_DELETED"; //NOI18N
}
return null;
}
}
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