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86 lines
3.1 KiB
C++
86 lines
3.1 KiB
C++
/* Copyright 2013 MultiMC Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef INSTANCETYPE_H
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#define INSTANCETYPE_H
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#include <QObject>
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#include "instanceloader.h"
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/*!
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* \brief The InstanceType class is a base class for all instance types.
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* It handles loading and creating instances of a certain type. There should be
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* one of these for each type of instance and they should be registered with the
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* InstanceLoader.
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* To create an instance, the InstanceLoader calls the type's createInstance()
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* function. Loading is done through the loadInstance() function.
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*/
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class InstanceType : public QObject
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{
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Q_OBJECT
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public:
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explicit InstanceType(QObject *parent = 0);
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friend class InstanceLoader;
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/*!
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* \brief Gets the ID for this instance type.
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* By default this is the name of the Instance class that this type
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* creates, but this can be changed by overriding this function.
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* The type ID should be unique as it is used to identify the type
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* of instances when they are loaded.
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* Changing this value at runtime results in undefined behavior.
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* \return This instance type's ID string.
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*/
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virtual QString typeID() const = 0;
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/*!
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* \brief Gets the name of this instance type as it is displayed to the user.
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* \return The instance type's display name.
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*/
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virtual QString displayName() const = 0;
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/*!
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* \brief Gets a longer, more detailed description of this instance type.
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* \return The instance type's description.
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*/
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virtual QString description() const = 0;
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protected:
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/*!
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* \brief Creates an instance and stores it in inst.
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* \param inst Pointer to store the created instance in.
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* \param instDir The instance's directory.
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* \return An InstTypeError error code.
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* TypeNotRegistered if the given type is not registered with the InstanceLoader.
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* InstExists if the given instance directory is already an instance.
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*/
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virtual InstanceLoader::InstTypeError createInstance(Instance *inst, const QString &instDir) const = 0;
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/*!
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* \brief Loads an instance from the given directory.
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* \param inst Pointer to store the loaded instance in.
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* \param instDir The instance's directory.
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* \return An InstTypeError error code.
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* TypeNotRegistered if the given type is not registered with the InstanceLoader.
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* NotAnInstance if the given instance directory isn't a valid instance.
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* WrongInstType if the given instance directory's type isn't an instance of this type.
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*/
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virtual InstanceLoader::InstTypeError loadInstance(Instance *inst, const QString &instDir) const = 0;
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};
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#endif // INSTANCETYPE_H
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