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Flyweight.cs
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Flyweight.cs
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namespace DesignPatterns.Structural;
public class Flyweight
{
[Fact]
public void Execute()
{
var aliasGenerator = new AliasGenerator();
Alias firstAlias = aliasGenerator.GetAlias("John Doe");
Assert.NotNull(firstAlias);
Alias sameAlias = aliasGenerator.GetAlias("John Doe");
Assert.Equal(firstAlias, sameAlias);
Alias anotherAlias = aliasGenerator.GetAlias("Jane Doe");
Assert.NotEqual(firstAlias, anotherAlias);
}
/* Factory */
public class AliasGenerator
{
private readonly Dictionary<string, Alias> _aliases = [];
public Alias GetAlias(string name)
{
if (!_aliases.TryGetValue(name, out Alias alias))
{
_aliases.Add(name, alias = new Alias(Guid.NewGuid()));
}
return alias;
}
}
/* FlyWeight */
public record Alias(Guid Id);
}