# t00097 - Test case for decorator design pattern
## Config
```yaml
diagrams:
  t00097_class:
    type: class
    title: Decorator design pattern
    glob:
      - t00097.cc
    using_namespace: clanguml::t00097
    include:
      namespaces:
        - clanguml::t00097
```
## Source code
File `tests/t00097/t00097.cc`
```cpp
#include <memory>
#include <string>

namespace clanguml {
namespace t00097 {

class Component {
public:
    virtual ~Component() = default;
    virtual std::string operation() const = 0;
};

class ConcreteComponent : public Component {
public:
    std::string operation() const override { return "ConcreteComponent"; }
};

class Decorator : public Component {
protected:
    std::shared_ptr<Component> component_;

public:
    explicit Decorator(std::shared_ptr<Component> component)
        : component_(component)
    {
    }

    std::string operation() const override { return component_->operation(); }
};

class ConcreteDecoratorA : public Decorator {
public:
    explicit ConcreteDecoratorA(std::shared_ptr<Component> component)
        : Decorator(component)
    {
    }

    std::string operation() const override
    {
        return "ConcreteDecoratorA(" + Decorator::operation() + ")";
    }

    std::string added_behavior() const { return "Added behavior A"; }
};

class ConcreteDecoratorB : public Decorator {
public:
    explicit ConcreteDecoratorB(std::shared_ptr<Component> component)
        : Decorator(component)
    {
    }

    std::string operation() const override
    {
        return "ConcreteDecoratorB(" + Decorator::operation() + ")";
    }

    void additional_method() const { }
};

class Client {
    std::shared_ptr<Component> component_;

public:
    explicit Client(std::shared_ptr<Component> component)
        : component_(component)
    {
    }

    std::string execute() { return component_->operation(); }
};

} // namespace t00097
} // namespace clanguml
```
## Generated PlantUML diagrams
![t00097_class](./t00097_class.svg "Test case for decorator design pattern")
## Generated Mermaid diagrams
![t00097_class](./t00097_class_mermaid.svg "Test case for decorator design pattern")
## Generated JSON models
```json
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  "package_type": "namespace",
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  "using_namespace": "clanguml::t00097"
}
```
## Generated GraphML models
```xml
<?xml version="1.0"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">
 <desc><![CDATA[Decorator design pattern]]></desc>
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  </edge>
  <edge id="e7" source="n5" target="n0">
   <data key="ed0">association</data>
   <data key="ed2">component_</data>
   <data key="ed1">private</data>
  </edge>
 </graph>
</graphml>

```