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ClickHouse Native Protocol JDBC implementation
/*
* 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.github.housepower.jdbc.buffer;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.LinkedList;
import java.util.List;
/**
*
*/
public class ByteArrayWriter implements BuffedWriter {
private final int blockSize;
private ByteBuffer buffer;
// TODO pooling
private final List byteBufferList = new LinkedList<>();
public ByteArrayWriter(int blockSize) {
this.blockSize = blockSize;
this.buffer = ByteBuffer.allocate(blockSize);
byteBufferList.add(buffer);
}
@Override
public void writeBinary(byte byt) throws IOException {
buffer.put(byt);
flushToTarget(false);
}
@Override
public void writeBinary(byte[] bytes) throws IOException {
writeBinary(bytes, 0, bytes.length);
}
@Override
public void writeBinary(byte[] bytes, int offset, int length) throws IOException {
while (buffer.remaining() < length) {
int num = buffer.remaining();
buffer.put(bytes, offset, num);
flushToTarget(true);
offset += num;
length -= num;
}
buffer.put(bytes, offset, length);
flushToTarget(false);
}
@Override
public void flushToTarget(boolean force) throws IOException {
if (buffer.hasRemaining() && !force) {
return;
}
buffer = ByteBuffer.allocate(blockSize);
byteBufferList.add(buffer);
}
public List getBufferList() {
return byteBufferList;
}
}