CODEWITHSUNDEEP
java
Ned Kriz
Ned Kriz

Reputation: 21

Call superclass constructor using reflection in Java

My issue is that depending on Lib version (.jar dependency) I use superclass constructor changes from Integer to String for arguments.

public class GlowEnchant
    extends EnchantmentWrapper {

public GlowEnchant(int id) {
    super(id);
}

public String getName() {
    return "Glow";
}

This is calling older version, but with new EnchantmentWrapper requires String to initiate constructor, and this shows with super that it's a wrong argument. I need to support both old and new Lib (half clients still prefer old one). How can this be done with Reflection (or anything that might be even simpler)?

Upvotes: 2

Views: 365

Answers (1)

Dakshinamurthy Karra
Dakshinamurthy Karra

Reputation: 5463

Some thing like this:

public class GlowEnchant extends EnchantmentWrapper {

    public GlowEnchant(int id) {
        super(id);
    }

    public GlowEnchant(String s) {
        super(s);
    }

    public String getName() {
        return "Glow";
    }

    public static GlowEnchant create(int id) {
        if (hasStringConstructor()) {
            return new GlowEnchant(id + "");
        } else
            return new GlowEnchant(id);
    }

    private static boolean hasStringConstructor() {
        try {
            EnchantmentWrapper.class.getConstructor(String.class);
            return true;
        } catch (NoSuchMethodException | SecurityException e) {
        }
        return false;
    }

}

Use a local copy of EnchantmentWrapper that includes both constructors for compilation.

Upvotes: 1

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