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== Code Examples ==
<pre>
using System;
namespace DoFactory.GangOfFour.Adapter.RealWorld
{
// MainApp test application
class MainApp
{
static void Main()
{
// Non-adapted chemical compound
Compound stuff = new Compound("Unknown");
stuff.Display();
// Adapted chemical compounds
Compound water = new RichCompound("Water");
water.Display();
Compound benzene = new RichCompound("Benzene");
benzene.Display();
Compound alcohol = new RichCompound("Alcohol");
alcohol.Display();
// Wait for user
Console.Read();
}
}
// "Target"
class Compound
{
protected string name;
protected float boilingPoint;
protected float meltingPoint;
protected double molecularWeight;
protected string molecularFormula;
// Constructor
public Compound(string name)
{
this.name = name;
}
public virtual void Display()
{
Console.WriteLine("\nCompound: {0} ------ ", name);
}
}
// "Adapter"
class RichCompound : Compound
{
private ChemicalDatabank bank;
// Constructor
public RichCompound(string name) : base(name)
{
}
public override void Display()
{
// Adaptee
bank = new ChemicalDatabank();
boilingPoint = bank.GetCriticalPoint(name, "B");
meltingPoint = bank.GetCriticalPoint(name, "M");
molecularWeight = bank.GetMolecularWeight(name);
molecularFormula = bank.GetMolecularStructure(name);
base.Display();
Console.WriteLine(" Formula: {0}", molecularFormula);
Console.WriteLine(" Weight : {0}", molecularWeight);
Console.WriteLine(" Melting Pt: {0}", meltingPoint);
Console.WriteLine(" Boiling Pt: {0}", boilingPoint);
}
}
// "Adaptee"
class ChemicalDatabank
{
// The Databank 'legacy API'
public float GetCriticalPoint(string compound, string point)
{
float temperature = 0.0F;
// Melting Point
if (point == "M")
{
switch (compound.ToLower())
{
case "water" : temperature = 0.0F; break;
case "benzene" : temperature = 5.5F; break;
case "alcohol" : temperature = -114.1F; break;
}
}
// Boiling Point
else
{
switch (compound.ToLower())
{
case "water" : temperature = 100.0F; break;
case "benzene" : temperature = 80.1F; break;
case "alcohol" : temperature = 78.3F; break;
}
}
return temperature;
}
public string GetMolecularStructure(string compound)
{
string structure = "";
switch (compound.ToLower())
{
case "water" : structure = "H20"; break;
case "benzene" : structure = "C6H6"; break;
case "alcohol" : structure = "C2H6O2"; break;
}
return structure;
}
public double GetMolecularWeight(string compound)
{
double weight = 0.0;
switch (compound.ToLower())
{
case "water" : weight = 18.015; break;
case "benzene" : weight = 78.1134; break;
case "alcohol" : weight = 46.0688; break;
}
return weight;
}
}
}
</pre>
== References ==