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package org.hsqldb.persist;
import org.hsqldb.Database;
import org.hsqldb.HsqlException;
import org.hsqldb.Row;
import org.hsqldb.RowAVL;
import org.hsqldb.RowAction;
import org.hsqldb.Session;
import org.hsqldb.Table;
import org.hsqldb.TableBase;
import org.hsqldb.TransactionManager;
import org.hsqldb.error.Error;
import org.hsqldb.error.ErrorCode;
import org.hsqldb.index.Index;
import org.hsqldb.index.IndexAVL;
import org.hsqldb.lib.ArrayUtil;
import org.hsqldb.rowio.RowInputInterface;
/*
* Implementation of PersistentStore for MEMORY tables.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 1.9.0
* @since 1.9.0
*/
public class RowStoreAVLMemory extends RowStoreAVL implements PersistentStore {
Database database;
int rowIdSequence = 0;
public RowStoreAVLMemory(PersistentStoreCollection manager, Table table) {
this.database = table.database;
this.manager = manager;
this.table = table;
this.indexList = table.getIndexList();
this.accessorList = new CachedObject[indexList.length];
manager.setStore(table, this);
}
public boolean isMemory() {
return true;
}
public int getAccessCount() {
return 0;
}
public void set(CachedObject object) {}
public CachedObject get(int i) {
throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVMemory");
}
public CachedObject getKeep(int i) {
throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVLMemory");
}
public CachedObject get(int i, boolean keep) {
throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVLMemory");
}
public CachedObject get(CachedObject object, boolean keep) {
return object;
}
public int getStorageSize(int i) {
return 0;
}
public void add(CachedObject object) {}
public CachedObject get(RowInputInterface in) {
return null;
}
public CachedObject getNewInstance(int size) {
return null;
}
public CachedObject getNewCachedObject(Session session, Object object) {
int id;
synchronized (this) {
id = rowIdSequence++;
}
Row row = new RowAVL(table, (Object[]) object, id);
if (session != null) {
RowAction action = new RowAction(session, table,
RowAction.ACTION_INSERT, row,
null);
row.rowAction = action;
}
return row;
}
public void removeAll() {
elementCount = 0;
ArrayUtil.fillArray(accessorList, null);
}
public void remove(int i) {}
public void removePersistence(int i) {}
public void release(int i) {}
public void commitPersistence(CachedObject row) {}
public void commitRow(Session session, Row row, int changeAction,
int txModel) {
Object[] data = row.getData();
switch (changeAction) {
case RowAction.ACTION_DELETE :
database.logger.writeDeleteStatement(session, (Table) table,
data);
break;
case RowAction.ACTION_INSERT :
database.logger.writeInsertStatement(session, (Table) table,
data);
break;
case RowAction.ACTION_INSERT_DELETE :
// INSERT + DELETE
break;
case RowAction.ACTION_DELETE_FINAL :
delete(session, row);
break;
}
}
public void rollbackRow(Session session, Row row, int changeAction,
int txModel) {
switch (changeAction) {
case RowAction.ACTION_DELETE :
if (txModel == TransactionManager.LOCKS) {
((RowAVL) row).setNewNodes();
indexRow(session, row);
}
break;
case RowAction.ACTION_INSERT :
if (txModel == TransactionManager.LOCKS) {
delete(session, row);
remove(row.getPos());
}
break;
case RowAction.ACTION_INSERT_DELETE :
// INSERT + DELETE
if (txModel == TransactionManager.LOCKS) {
remove(row.getPos());
}
break;
}
}
//
public DataFileCache getCache() {
return null;
}
public void setCache(DataFileCache cache) {}
public void release() {
ArrayUtil.fillArray(accessorList, null);
}
public void setAccessor(Index key, CachedObject accessor) {
Index index = (Index) key;
accessorList[index.getPosition()] = accessor;
}
public void setAccessor(Index key, int accessor) {}
public int elementCount(Session session) {
Index index = this.indexList[0];
if (elementCount < 0) {
if (index == null) {
elementCount = 0;
} else {
elementCount = ((IndexAVL) index).getNodeCount(session, this);
}
}
if (session != null && index != null
&& (table.getTableType() == TableBase.SYSTEM_TABLE
|| database.txManager.getTransactionControl()
!= TransactionManager.LOCKS)) {
return ((IndexAVL) index).getNodeCount(session, this);
}
return elementCount;
}
}