/Users/sjg/iPhone/WhirlyGlobe/WhirlyGlobeSrc/WhirlyGlobeLib/include/Identifiable.h

/*
 *  Identifiable.h
 *  WhirlyGlobeLib
 *
 *  Created by Steve Gifford on 2/7/11.
 *  Copyright 2011 mousebird consulting
 *
 *  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.
 *
 */

#import <set>

namespace WhirlyGlobe
{

typedef unsigned long SimpleIdentity;
    
static const SimpleIdentity EmptyIdentity = 0;
    
typedef std::set<SimpleIdentity> SimpleIDSet;

class Identifiable
{
public:
        // Note: This will probably work with multiple threads
        Identifiable();
        virtual ~Identifiable() { }
        
        SimpleIdentity getId() const { return myId; }
        
        void setId(SimpleIdentity inId) { myId = inId; }

        static SimpleIdentity genId();
    
    bool operator < (const Identifiable &that) const { return myId < that.myId; }
                
protected:
        SimpleIdentity myId;
};
        
typedef struct
{
        bool operator () (const Identifiable *a,const Identifiable *b) { return a->getId() < b->getId(); }
} IdentifiableSorter;

}