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Copy pathProgressHandler.java
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75 lines (63 loc) · 2.15 KB
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/*
* Copyright 2010 ALM Works Ltd
*
* 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
*
* http://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 com.almworks.sqlite4java;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.LongBuffer;
class ProgressHandler {
public static final ProgressHandler DISPOSED = new ProgressHandler();
private static final int OFFSET_STEPCOUNT = 1;
private static final int OFFSET_CANCEL = 0;
private final int myStepsPerCallback;
private SWIGTYPE_p_direct_buffer myPointer;
private ByteBuffer myBuffer;
private LongBuffer myLongs;
public ProgressHandler(SWIGTYPE_p_direct_buffer pointer, ByteBuffer buffer, int stepsPerCallback) {
myStepsPerCallback = stepsPerCallback;
assert buffer.isDirect();
assert buffer.capacity() == 16 : buffer.capacity();
myPointer = pointer;
myBuffer = buffer;
myLongs = buffer.order(ByteOrder.nativeOrder()).asLongBuffer();
assert myLongs.capacity() == 2;
}
private ProgressHandler() {
myStepsPerCallback = 0;
}
public synchronized SWIGTYPE_p_direct_buffer dispose() {
SWIGTYPE_p_direct_buffer ptr = myPointer;
myBuffer = null;
myPointer = null;
myLongs = null;
return ptr;
}
public synchronized void reset() {
if (myLongs == null)
return;
myLongs.put(OFFSET_CANCEL, 0L);
myLongs.put(OFFSET_STEPCOUNT, 0L);
}
public synchronized void cancel() {
if (myLongs == null)
return;
myLongs.put(OFFSET_CANCEL, 1L);
}
public synchronized long getSteps() {
if (myLongs == null)
return -1;
return myLongs.get(OFFSET_STEPCOUNT) * myStepsPerCallback;
}
}