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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.
*
*/
#include "Unit.h"
#include "Codec.h"
namespace qpid {
namespace amqp_0_10 {
void Unit::updateVariant() {
switch (header.getType()) {
case CONTROL: variant=ControlHolder(); break;
case COMMAND: variant=CommandHolder();
case HEADER: variant=Header();
case BODY: variant=Body(header.getDataSize());
}
}
struct GetTypeVisitor : public boost::static_visitor<SegmentType> {
SegmentType operator()(const CommandHolder& ) const { return COMMAND; }
SegmentType operator()(const ControlHolder& ) const { return CONTROL; }
SegmentType operator()(const Header& ) const { return HEADER; }
SegmentType operator()(const Body&) const { return BODY; }
};
struct GetFlagsVisitor : public boost::static_visitor<uint8_t> {
uint8_t operator()(const CommandHolder& ) const { return FIRST_FRAME|LAST_FRAME|FIRST_SEGMENT; }
uint8_t operator()(const ControlHolder& ) const { return FIRST_FRAME|LAST_FRAME|FIRST_SEGMENT; }
uint8_t operator()(const Header& ) const { return FIRST_FRAME|LAST_FRAME; }
uint8_t operator()(const Body&) const { return 0; }
};
void Unit::updateHeader(uint8_t flags) {
GetFlagsVisitor flagger;
header.setFlags(flags | variant.apply_visitor(flagger));
GetTypeVisitor getter;
header.setType(variant.apply_visitor(getter));
header.setDataSize(Codec::size(*this));
// track automatically set from type.
// no channel specified at this point.
}
std::ostream& operator<<(std::ostream& o, const Unit& u) {
return o << u.getHeader() << " " << u.variant.type().name() << "[" << u.variant << "]";
}
}} // namespace qpid::amqp_0_10
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