/* Copyright (c) 2001-2010, The HSQL Development Group
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package org.hsqldb.persist;
import java.io.IOException;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.hsqldb.HsqlException;
import org.hsqldb.Row;
import org.hsqldb.RowAVL;
import org.hsqldb.RowAVLDiskData;
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.lib.ArrayUtil;
import org.hsqldb.rowio.RowInputInterface;
/*
* Implementation of PersistentStore for TEXT tables.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 1.9.0
* @since 1.9.0
*/
public class RowStoreAVLDiskData extends RowStoreAVLDisk {
ReentrantReadWriteLock lock = new ReentrantReadWriteLock(true);
ReentrantReadWriteLock.WriteLock writeLock = lock.writeLock();
RowAVLDiskData currentRow;
public RowStoreAVLDiskData(PersistentStoreCollection manager,
Table table) {
super(manager, null, table);
}
public CachedObject get(CachedObject object, boolean keep) {
writeLock.lock();
try {
currentRow = (RowAVLDiskData) object;
object = cache.get(object, this, keep);
return object;
} finally {
currentRow = null;
writeLock.unlock();
}
}
public void add(CachedObject object) {
int size = object.getRealSize(cache.rowOut);
object.setStorageSize(size);
cache.add(object);
}
public CachedObject get(RowInputInterface in) {
try {
RowAVLDiskData newRow = new RowAVLDiskData(this, table, in);
if (currentRow == null) {
return newRow;
}
currentRow.setData(newRow.getData());
return currentRow;
} catch (IOException e) {
throw Error.error(ErrorCode.TEXT_FILE_IO, e);
}
}
public CachedObject getNewCachedObject(Session session, Object object) {
Row row = new RowAVLDiskData(this, table, (Object[]) object);
add(row);
if (session != null) {
RowAction.addInsertAction(session, table, row);
}
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());
throw e;
}
}
public void set(CachedObject object) {}
public void removeAll() {
elementCount = 0;
ArrayUtil.fillArray(accessorList, null);
}
public void remove(int i) {
cache.remove(i, this);
}
public void removePersistence(int i) {
cache.removePersistence(i, this);
}
public void release(int i) {
cache.release(i);
}
public CachedObject getAccessor(Index key) {
int position = key.getPosition();
if (position >= accessorList.length) {
throw Error.runtimeError(ErrorCode.U_S0500, "RowStoreAVL");
}
return accessorList[position];
}
public void commitPersistence(CachedObject row) {
try {
cache.saveRow(row);
} catch (HsqlException e1) {}
}
public void delete(Session session, Row row) {
for (int j = indexList.length - 1; j >= 0; j--) {
indexList[j].delete(session, this, row);
}
row.delete(this);
}
public void commitRow(Session session, Row row, int changeAction,
int txModel) {
switch (changeAction) {
case RowAction.ACTION_DELETE :
removePersistence(row.getPos());
break;
case RowAction.ACTION_INSERT :
commitPersistence(row);
break;
case RowAction.ACTION_INSERT_DELETE :
// INSERT + DELETE
if (txModel == TransactionManager.LOCKS) {
remove(row.getPos());
} else {
delete(session, row);
remove(row.getPos());
}
break;
case RowAction.ACTION_DELETE_FINAL :
if (txModel != TransactionManager.LOCKS) {
delete(session, 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) {
((RowAVL) row).setNewNodes();
indexRow(session, row);
}
break;
case RowAction.ACTION_INSERT :
if (txModel == TransactionManager.LOCKS) {
delete(session, row);
remove(row.getPos());
} else {}
break;
case RowAction.ACTION_INSERT_DELETE :
// INSERT + DELETE
if (txModel == TransactionManager.LOCKS) {
remove(row.getPos());
} else {
delete(session, row);
remove(row.getPos());
}
break;
}
}
//
public void release() {
ArrayUtil.fillArray(accessorList, null);
table.database.logger.closeTextCache((Table) table);
cache = null;
}
}