CollectionVariant.h

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/******************************************************************************
 * Copyright (C) 2014 by Ralf Kaestner                                        *
 * ralf.kaestner@gmail.com                                                    *
 *                                                                            *
 * This program is free software; you can redistribute it and/or modify       *
 * it under the terms of the Lesser GNU General Public License as published by*
 * the Free Software Foundation; either version 3 of the License, or          *
 * (at your option) any later version.                                        *
 *                                                                            *
 * This program is distributed in the hope that it will be useful,            *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the               *
 * Lesser GNU General Public License for more details.                        *
 *                                                                            *
 * You should have received a copy of the Lesser GNU General Public License   *
 * along with this program. If not, see <http://www.gnu.org/licenses/>.       *
 ******************************************************************************/

#ifndef VARIANT_TOPIC_TOOLS_COLLECTION_VARIANT_H
#define VARIANT_TOPIC_TOOLS_COLLECTION_VARIANT_H

#include <variant_topic_tools/Variant.h>

namespace variant_topic_tools {
  class CollectionVariant :
    public Variant {
  friend class Variant;
  public:
    CollectionVariant();

    CollectionVariant(const CollectionVariant& src);

    CollectionVariant(const Variant& src);

    ~CollectionVariant();

    size_t getNumMembers() const;

    void setMember(int index, const Variant& member);

    void setMember(const std::string& name, const Variant& member);

    Variant getMember(int index) const;

    Variant getMember(const std::string& name) const;

    template <typename T> T& getValue(int index);

    template <typename T> const T& getValue(int index) const;

    template <typename T> T& getValue(const std::string& name);

    template <typename T> const T& getValue(const std::string& name) const;

    using Variant::getValue;

    bool hasMember(const std::string& name) const;

    bool isEmpty() const;

    Variant operator[](int index) const;

    Variant operator[](const char* name) const;

  protected:
    class Value :
      public virtual Variant::Value {
    public:
      Value();

      virtual ~Value();

      virtual size_t getNumMembers() const = 0;

      virtual void setMember(int index, const Variant& member) = 0;

      virtual void setMember(const std::string& name, const Variant&
        member) = 0;

      void setMember(const std::string& name, const Variant& member,
        size_t pos);

      virtual Variant getMember(int index) const = 0;

      virtual Variant getMember(const std::string& name) const = 0;

      Variant getMember(const std::string& name, size_t pos) const;

      virtual bool hasMember(const std::string& name) const = 0;

      bool hasMember(const std::string& name, size_t pos) const;

      bool isEqual(const Variant::Value& value) const;

      void read(std::istream& stream);

      virtual void writeMember(std::ostream& stream, int index) const = 0;

      void write(std::ostream& stream) const;
    };

    CollectionVariant(const DataType& type);
  };
};

#include <variant_topic_tools/CollectionVariant.tpp>

#endif