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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.thrift.transport.sasl;
import java.nio.ByteBuffer;
import org.apache.thrift.transport.TTransport;
import org.apache.thrift.transport.TTransportException;
import org.apache.thrift.utils.StringUtils;
/** Headers' size should be predefined. */
public abstract class FixedSizeHeaderReader implements FrameHeaderReader {
protected final ByteBuffer byteBuffer = ByteBuffer.allocate(headerSize());
@Override
public boolean isComplete() {
return !byteBuffer.hasRemaining();
}
@Override
public void clear() {
byteBuffer.clear();
}
@Override
public byte[] toBytes() {
if (!isComplete()) {
throw new IllegalStateException(
"Header is not yet complete "
+ StringUtils.bytesToHexString(byteBuffer.array(), 0, byteBuffer.position()));
}
return byteBuffer.array();
}
@Override
public boolean read(TTransport transport) throws TTransportException {
FrameReader.readAvailable(transport, byteBuffer);
if (byteBuffer.hasRemaining()) {
return false;
}
onComplete();
return true;
}
/**
* @return Size of the header.
*/
protected abstract int headerSize();
/**
* Actions (e.g. validation) to carry out when the header is complete.
*
* @throws TTransportException
*/
protected abstract void onComplete() throws TTransportException;
}
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