/* Copyright (c) 2001-2014, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.hsqldb.persist;
import org.hsqldb.error.
Error;
import org.hsqldb.error.
ErrorCode;
import org.hsqldb.lib.
DoubleIntIndex;
/**
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.0
* @since 2.3.0
*/
public class
TableSpaceManagerSimple implements
TableSpaceManager {
DataFileCache cache;
final int
scale;
public
TableSpaceManagerSimple(
DataFileCache cache) {
this.
cache =
cache;
this.
scale =
cache.
getDataFileScale();
}
public int
getSpaceID() {
return
DataSpaceManager.
tableIdDefault;
}
public void
release(long
pos, int
rowSize) {}
/**
* Returns the position of a free block or 0.
*/
public long
getFilePosition(int
rowSize, boolean
asBlocks) {
cache.
writeLock.
lock();
try {
long
position;
long
newFreePosition;
position =
cache.
getFileFreePos() /
scale;
newFreePosition =
cache.
getFileFreePos() +
rowSize;
if (
newFreePosition >
cache.
maxDataFileSize) {
cache.
logSevereEvent("data file reached maximum size "
+
cache.
dataFileName, null);
throw
Error.
error(
ErrorCode.
DATA_FILE_IS_FULL);
}
cache.
fileFreePosition =
newFreePosition;
return
position;
} finally {
cache.
writeLock.
unlock();
}
}
public boolean
hasFileRoom(long
blockSize) {
return true;
}
public void
addFileBlock(long
blockFreePos, long
blockLimit) {}
public void
initialiseFileBlock(
DoubleIntIndex lookup, long
blockFreePos,
long
blockLimit) {}
public void
reset() {}
public long
getLostBlocksSize() {
return 0;
}
public boolean
isDefaultSpace() {
return true;
}
}