jetbrains.exodus.io.AbstractDataWriter Maven / Gradle / Ivy
/**
* Copyright 2010 - 2022 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.exodus.io;
public abstract class AbstractDataWriter implements DataWriter {
private boolean open;
protected AbstractDataWriter() {
open = false;
}
@Override
public final boolean isOpen() {
return open;
}
@Override
public final void sync() {
if (open) {
syncImpl();
}
}
@Override
public void syncDirectory() {
}
@Override
public final void close() {
if (open) {
closeImpl();
open = false;
}
}
@Override
public void clear() {
close();
clearImpl();
}
@Override
public final Block openOrCreateBlock(final long address, final long length) {
if (open) {
throw new IllegalStateException("Can't create blocks with open data writer");
} else {
final Block result = openOrCreateBlockImpl(address, length);
open = true;
return result;
}
}
protected abstract void syncImpl();
protected abstract void closeImpl();
protected abstract void clearImpl();
protected abstract Block openOrCreateBlockImpl(final long address, final long length);
}