oracle.toplink.essentials.sequencing.NativeSequence Maven / Gradle / Ivy
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package oracle.toplink.essentials.sequencing;
import oracle.toplink.essentials.queryframework.*;
import oracle.toplink.essentials.internal.databaseaccess.DatabasePlatform;
import oracle.toplink.essentials.internal.helper.Helper;
import oracle.toplink.essentials.exceptions.ValidationException;
/**
*
* Purpose:
*
*/
public class NativeSequence extends QuerySequence {
public NativeSequence() {
super();
setShouldSkipUpdate(true);
}
public NativeSequence(String name) {
super(name);
setShouldSkipUpdate(true);
}
public NativeSequence(String name, int size) {
super(name, size);
setShouldSkipUpdate(true);
}
public NativeSequence(String name, int size, int initialValue) {
super(name, size, initialValue);
setShouldSkipUpdate(true);
}
public boolean equals(Object obj) {
if (obj instanceof NativeSequence) {
return equalNameAndSize(this, (NativeSequence)obj);
} else {
return false;
}
}
/**
* INTERNAL:
*/
protected ValueReadQuery buildSelectQuery() {
return ((DatabasePlatform)getDatasourcePlatform()).buildSelectQueryForNativeSequence();
}
/**
* INTERNAL:
*/
protected ValueReadQuery buildSelectQuery(String seqName, Integer size) {
return ((DatabasePlatform)getDatasourcePlatform()).buildSelectQueryForNativeSequence(seqName, size);
}
/**
* INTERNAL:
*/
public void onConnect() {
DatabasePlatform dbPlatform = null;
try {
dbPlatform = (DatabasePlatform)getDatasourcePlatform();
} catch (ClassCastException ex) {
if (getSelectQuery() == null) {
throw ValidationException.platformDoesNotSupportSequence(getName(), Helper.getShortClassName(getDatasourcePlatform()), Helper.getShortClassName(this));
}
}
if (!dbPlatform.supportsNativeSequenceNumbers() && (getSelectQuery() == null)) {
throw ValidationException.platformDoesNotSupportSequence(getName(), Helper.getShortClassName(getDatasourcePlatform()), Helper.getShortClassName(this));
}
super.onConnect();
if (dbPlatform != null) {
setShouldAcquireValueAfterInsert(dbPlatform.shouldNativeSequenceAcquireValueAfterInsert());
setShouldUseTransaction(dbPlatform.shouldNativeSequenceUseTransaction());
}
}
/**
* INTERNAL:
*/
public void onDisconnect() {
setShouldAcquireValueAfterInsert(false);
setShouldUseTransaction(false);
super.onDisconnect();
}
}