/* Copyright (c) 2001-2017, 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;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* 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 java.lang.reflect.
Constructor;
import org.hsqldb.
Session;
import org.hsqldb.error.
Error;
import org.hsqldb.error.
ErrorCode;
import org.hsqldb.rowio.
RowInputInterface;
/**
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.5
* @since 2.3.0
*/
public class
BlockObjectStore extends
SimpleStore {
final
Class objectClass;
final
Constructor constructor;
final int
storageSize;
final int
blockSize;
public
BlockObjectStore(
DataFileCache cache,
TableSpaceManager tableSpaceManager,
Class objectClass, int
storageSize,
int
blockSize) {
this.
cache =
cache;
this.
spaceManager =
tableSpaceManager;
this.
objectClass =
objectClass;
this.
blockSize =
blockSize;
this.
storageSize =
storageSize;
try {
this.
constructor =
objectClass.
getConstructor(int.class);
} catch (
Exception e) {
throw
Error.
runtimeError(
ErrorCode.
U_S0500, "BlockObjectStore");
}
}
public
CachedObject get(long
i) {
return
cache.
get(
i,
storageSize, this, false);
}
public
CachedObject get(
CachedObject object, boolean
keep) {
return
cache.
get(
object, this,
keep);
}
public
CachedObject get(long
i, boolean
keep) {
return
cache.
get(
i,
storageSize, this,
keep);
}
public void
add(
Session session,
CachedObject object, boolean
tx) {
throw
Error.
runtimeError(
ErrorCode.
U_S0500, "BlockObjectStore");
}
public void
add(
CachedObject object, boolean
keep) {
int
size =
object.
getRealSize(
cache.
rowOut);
if (
size >
storageSize) {
throw
Error.
runtimeError(
ErrorCode.
U_S0500, "BlockObjectStore");
}
object.
setStorageSize(
storageSize);
long
pos =
spaceManager.
getFilePosition(
storageSize, true);
object.
setPos(
pos);
cache.
add(
object,
keep);
}
public
CachedObject get(
RowInputInterface in) {
CachedObject object =
getNewInstance();
object.
read(
in);
int
size =
object.
getRealSize(
cache.
rowOut);
if (
size >
storageSize) {
throw
Error.
runtimeError(
ErrorCode.
U_S0500, "BlockObjectStore");
}
object.
setStorageSize(
storageSize);
return
object;
}
public
CachedObject getNewInstance(int
size) {
throw
Error.
runtimeError(
ErrorCode.
U_S0500, "BlockObjectStore");
}
private
CachedObject getNewInstance() {
try {
CachedObject object =
(
CachedObject)
constructor.
newInstance(new
Object[]{
Integer.
valueOf(
blockSize) });
return
object;
} catch (
Exception e) {
return null;
}
}
}