/*
 *
 * 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.
 *
 */
#ifndef _HeadersExchange_
#define _HeadersExchange_

#include <vector>
#include "Exchange.h"
#include "qpid/framing/FieldTable.h"
#include "qpid/sys/CopyOnWriteArray.h"
#include "qpid/sys/Mutex.h"
#include "Queue.h"

namespace qpid {
namespace broker {


class HeadersExchange : public virtual Exchange {    
    typedef std::pair<qpid::framing::FieldTable, Binding::shared_ptr> HeaderMap;
    typedef qpid::sys::CopyOnWriteArray<Binding::shared_ptr> Bindings;

    struct MatchArgs
    {
        const Queue::shared_ptr queue;        
        const qpid::framing::FieldTable* args;
        MatchArgs(Queue::shared_ptr q, const qpid::framing::FieldTable* a);
        bool operator()(Exchange::Binding::shared_ptr b);        
    };
    struct MatchKey
    {
        const Queue::shared_ptr queue;        
        const std::string& key;
        MatchKey(Queue::shared_ptr q, const std::string& k);
        bool operator()(Exchange::Binding::shared_ptr b);        
    };

    Bindings bindings;
    qpid::sys::Mutex lock;

    static std::string getMatch(const framing::FieldTable* args);

  public:
    static const std::string typeName;

    HeadersExchange(const string& name, management::Manageable* parent = 0);
    HeadersExchange(const string& _name, bool _durable, 
                    const qpid::framing::FieldTable& _args,
                    management::Manageable* parent = 0);
    
    virtual std::string getType() const { return typeName; }            
        
    virtual bool bind(Queue::shared_ptr queue, const string& routingKey, const qpid::framing::FieldTable* args);

    virtual bool unbind(Queue::shared_ptr queue, const string& routingKey, const qpid::framing::FieldTable* args);

    virtual void route(Deliverable& msg, const string& routingKey, const qpid::framing::FieldTable* args);

    virtual bool isBound(Queue::shared_ptr queue, const string* const routingKey, const qpid::framing::FieldTable* const args);

    virtual ~HeadersExchange();

    static bool match(const qpid::framing::FieldTable& bindArgs, const qpid::framing::FieldTable& msgArgs);
    static bool equal(const qpid::framing::FieldTable& bindArgs, const qpid::framing::FieldTable& msgArgs);
};



}
}

#endif