/* Copyright (c) 2001-2010, The HSQL Development Group
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package org.hsqldb.persist;
import java.io.IOException;
import org.hsqldb.Database;
import org.hsqldb.HsqlException;
import org.hsqldb.Row;
import org.hsqldb.RowAVL;
import org.hsqldb.RowAVLDisk;
import org.hsqldb.RowAction;
import org.hsqldb.Session;
import org.hsqldb.Table;
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.index.NodeAVL;
import org.hsqldb.lib.ArrayUtil;
import org.hsqldb.rowio.RowInputInterface;
import org.hsqldb.rowio.RowOutputInterface;
/*
* Implementation of PersistentStore for CACHED tables.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 1.9.0
* @since 1.9.0
*/
public class RowStoreAVLDisk extends RowStoreAVL {
DataFileCache cache;
RowOutputInterface rowOut;
Database database;
public RowStoreAVLDisk(PersistentStoreCollection manager,
DataFileCache cache, Table table) {
this.database = table.database;
this.manager = manager;
this.table = table;
this.indexList = table.getIndexList();
this.accessorList = new CachedObject[indexList.length];
this.cache = cache;
if (cache != null) {
rowOut = cache.rowOut.duplicate();
}
manager.setStore(table, this);
}
public boolean isMemory() {
return false;
}
public int getAccessCount() {
return cache.getAccessCount();
}
public void set(CachedObject object) {
Row row = ((Row) object);
database.txManager.setTransactionInfo(row);
}
public CachedObject get(int key) {
CachedObject object = cache.get(key, this, false);
return object;
}
public CachedObject getKeep(int key) {
CachedObject object = cache.get(key, this, true);
return object;
}
public CachedObject get(int key, boolean keep) {
CachedObject object = cache.get(key, this, keep);
return object;
}
public CachedObject get(CachedObject object, boolean keep) {
object = cache.get(object, this, keep);
return object;
}
public int getStorageSize(int i) {
return cache.get(i, this, false).getStorageSize();
}
public void add(CachedObject object) {
int size = object.getRealSize(rowOut);
size = rowOut.getStorageSize(size);
object.setStorageSize(size);
cache.add(object);
}
public CachedObject get(RowInputInterface in) {
try {
return new RowAVLDisk(table, in);
} catch (IOException e) {
throw Error.error(ErrorCode.DATA_FILE_ERROR, e);
}
}
public CachedObject getNewInstance(int size) {
return null;
}
public CachedObject getNewCachedObject(Session session, Object object) {
Row row = new RowAVLDisk(table, (Object[]) object);
add(row);
if (session != null) {
RowAction action = new RowAction(session, table,
RowAction.ACTION_INSERT, row,
null);
row.rowAction = action;
}
return row;
}
public void indexRow(Session session, Row row) {
int i = 0;
try {
for (; i < indexList.length; i++) {
indexList[i].insert(session, this, row);
}
} catch (HsqlException e) {
// unique index violation - rollback insert
for (--i; i >= 0; i--) {
indexList[i].delete(session, this, row);
}
remove(row.getPos());
database.txManager.removeTransactionInfo(row);
throw e;
}
}
public void removeAll() {
elementCount = 0;
ArrayUtil.fillArray(accessorList, null);
}
public void remove(int i) {
cache.remove(i, this);
}
public void removePersistence(int i) {}
public void release(int i) {
cache.release(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);
if (txModel == TransactionManager.LOCKS) {
remove(row.getPos());
}
break;
case RowAction.ACTION_INSERT :
database.logger.writeInsertStatement(session, (Table) table,
data);
break;
case RowAction.ACTION_INSERT_DELETE :
// INSERT + DELETE
if (txModel == TransactionManager.LOCKS) {
remove(row.getPos());
}
break;
case RowAction.ACTION_DELETE_FINAL :
delete(session, row);
// remove after delete
database.txManager.removeTransactionInfo(row);
remove(row.getPos());
break;
}
}
public void rollbackRow(Session session, Row row, int changeAction,
int txModel) {
switch (changeAction) {
case RowAction.ACTION_DELETE :
if (txModel == TransactionManager.LOCKS) {
row = (Row) get(row, true);
((RowAVL) row).setNewNodes();
row.keepInMemory(false);
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 cache;
}
public void setCache(DataFileCache cache) {
this.cache = cache;
}
public void release() {
ArrayUtil.fillArray(accessorList, null);
cache = null;
}
public CachedObject getAccessor(Index key) {
NodeAVL node = (NodeAVL) accessorList[key.getPosition()];
if (node == null) {
return null;
}
if (!node.isInMemory()) {
RowAVL row = (RowAVL) get(node.getPos(), false);
node = row.getNode(key.getPosition());
accessorList[key.getPosition()] = node;
}
return node;
}
public void setAccessor(Index key, CachedObject accessor) {
Index index = (Index) key;
accessorList[index.getPosition()] = accessor;
}
public void setAccessor(Index key, int accessor) {
CachedObject object = get(accessor, false);
if (object != null) {
NodeAVL node = ((RowAVL) object).getNode(key.getPosition());
object = node;
}
setAccessor(key, object);
}
public void resetAccessorKeys(Index[] keys) {
if (indexList.length == 0 || indexList[0] == null
|| accessorList[0] == null) {
indexList = keys;
accessorList = new CachedObject[indexList.length];
return;
}
throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVLDisk");
}
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
&& database.txManager.getTransactionControl()
!= TransactionManager.LOCKS) {
return ((IndexAVL) index).getNodeCount(session, this);
}
return elementCount;
}
public void lock() {
cache.writeLock.lock();
}
public void unlock() {
cache.writeLock.unlock();
}
}