Builder pattern subclassing - solved? Without traits
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class Base<SUB> {
public SUB withBaseParam(String param) {
System.out.println("Here in Base with " + param);
return (SUB) this;
}
public Base build() {
System.out.println("Building in Base class");
return this;
}
}
class Subclass extends Base<Subclass> {
public Subclass withSubclassParam(String param) {
System.out.println("Here in Subclass with " + param);
return this;
}
}
class AnotherSubclass extends Base<AnotherSubclass> {
public AnotherSubclass withAnotherSubclassParam(String param) {
System.out.println("Here in AnotherSubclass with " + param);
return this;
}
}
public class Client {
public static void main(String[] args) {
System.out.println("Subclass example:\n");
new Subclass()
.withSubclassParam("s1")
.withBaseParam("foo")
.withSubclassParam("s2")
.withSubclassParam("s3")
.build();
System.out.println("\n\nAnotherSubclass example:\n");
new AnotherSubclass()
.withBaseParam("foo")
.withAnotherSubclassParam("s1")
.withBaseParam("bar")
.withAnotherSubclassParam("s2")
.withAnotherSubclassParam("s3")
.withBaseParam("baz")
.build();
}
}
Java
INFO