/*
* Copyright DataStax, Inc.
*
* 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.datastax.dse.driver.internal.core.graph;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import java.nio.ByteBuffer;
public class ByteBufUtil {
// Does not move the reader index of the ByteBuf parameter
public static ByteBuffer toByteBuffer(ByteBuf buffer) {
if (buffer.isDirect()) {
return buffer.nioBuffer();
}
final byte[] bytes = new byte[buffer.readableBytes()];
buffer.getBytes(buffer.readerIndex(), bytes);
return ByteBuffer.wrap(bytes);
}
static ByteBuf toByteBuf(ByteBuffer buffer) {
return Unpooled.wrappedBuffer(buffer);
}
// read a predefined amount of bytes from the netty buffer and move its readerIndex
public static ByteBuffer readBytes(ByteBuf nettyBuf, int size) {
ByteBuffer res = ByteBuffer.allocate(size);
nettyBuf.readBytes(res);
res.flip();
return res;
}
}