src/hpp/dds/sub/ReaderQuery.hpp

Go to the documentation of this file.

#ifndef OMG_DDS_SUB_READER_QUERY_HPP_
#define OMG_DDS_SUB_READER_QUERY_HPP_

/* Copyright 2010, Object Management Group, Inc.
 * Copyright 2010, PrismTech, Corp.
 * Copyright 2010, Real-Time Innovations, Inc.
 * All rights reserved.
 *
 * 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.
 */

#include <dds/core/InstanceHandle.hpp>
#include <dds/sub/subfwd.hpp>
#include <dds/sub/status/ReaderState.hpp>
#include <dds/sub/cond/ReadCondition.hpp>


namespace dds { namespace sub {

template <typename T>
class ReaderQuery {
    // --- Type Aliases: --- //
public:
    typedef ::dds::sub::cond::ReadCondition<T> ReadCondition;

    // --- Default Construction & Destruction: --- //
public:
    ReaderQuery()
    : instance_(), read_or_take_next_(false),
      reader_state_(dds::sub::status::ReaderState::any()),
      condition_()
    { }

    ~ReaderQuery() { }

    // --- Copy: --- //
public:
    ReaderQuery(const ReaderQuery& src)
    : instance_(src._instance),
      read_or_take_next_(src.read_or_take_next_),
      reader_state_(src.reader_state_),
      condition_(src.condition_)
    { }

    ReaderQuery& operator =(const ReaderQuery& src) {
        instance_ = src._instance;
        read_or_take_next_ = src.read_or_take_next_;
        reader_state_ = src.reader_state_;
        condition_ = src.condition_;
    }

    // --- Conversion: --- //
public:
    /* implicit */ ReaderQuery(const ::dds::sub::status::ReaderState& src)
    : instance_(),
      read_or_take_next_(false),
      reader_state_(src),
      condition_()
    { }

    /* implicit */ ReaderQuery(const ReadCondition& src)
    : instance_(),
      read_or_take_next_(false),
      reader_state_(src.reader_state()),
      condition_(src)
    { }

    /* implicit */ ReaderQuery(const ::dds::core::InstanceHandle& src,
                               bool read_or_take_next = false)
    : instance_(src),
      read_or_take_next_(read_or_take_next),
      reader_state_(dds::sub::status::ReaderState::any()),
      condition_()
    { }

    ReaderQuery(const ::dds::sub::status::ReaderState& state,
                const ::dds::core::InstanceHandle& handle,
                bool read_or_take_next = false)
    : instance_(handle),
      read_or_take_next_(read_or_take_next),
      reader_state_(state),
      condition_()
    { }

    ReaderQuery(const ReadCondition& cond,
                const ::dds::core::InstanceHandle& handle,
                bool read_or_take_next = false)
    : instance_(handle),
      read_or_take_next_(read_or_take_next),
      reader_state_(cond.reader_state()),
      condition_(cond)
    { }

    // --- Query Access: --- //
public:
    const dds::core::InstanceHandle instance() const {
        return instance_;
    }

    bool is_read_or_take_next() const {
        return read_or_take_next_;
    }

    const dds::sub::status::ReaderState reader_state() const {
        return reader_state_;
    }

    ReadCondition condition() const {
        return condition_;
    }

private:
    dds::core::InstanceHandle instance_;
    bool read_or_take_next_;
    dds::sub::status::ReaderState reader_state_;
    ReadCondition condition_;
};

} }

#endif /* OMG_DDS_SUB_READER_QUERY_HPP_ */