[移动开发]Java BuildUtils

import java.util.ArrayList;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.Supplier;

public class BuilderUtil<T> {
    private final Supplier<T> instantiator;
    private List<Consumer<T>> modifiers = new ArrayList();

    public BuilderUtil(Supplier<T> instantiator) {
        this.instantiator = instantiator;
    }

    public static <T> BuilderUtil<T> of(Supplier<T> instantiator) {
        return new BuilderUtil(instantiator);
    }

    public <P1> BuilderUtil<T> with(BuilderUtil.Consumer1<T, P1> consumer, P1 p1) {
        Consumer<T> c = (instance) -> {
            consumer.accept(instance, p1);
        };
        this.modifiers.add(c);
        return this;
    }

    public <P1, P2> BuilderUtil<T> with(BuilderUtil.Consumer2<T, P1, P2> consumer, P1 p1, P2 p2) {
        Consumer<T> c = (instance) -> {
            consumer.accept(instance, p1, p2);
        };
        this.modifiers.add(c);
        return this;
    }

    public <P1, P2, P3> BuilderUtil<T> with(BuilderUtil.Consumer3<T, P1, P2, P3> consumer, P1 p1, P2 p2, P3 p3) {
        Consumer<T> c = (instance) -> {
            consumer.accept(instance, p1, p2, p3);
        };
        this.modifiers.add(c);
        return this;
    }

    public T build() {
        T value = this.instantiator.get();
        this.modifiers.forEach((modifier) -> {
            modifier.accept(value);
        });
        this.modifiers.clear();
        return value;
    }

    @FunctionalInterface
    public interface Consumer3<T, P1, P2, P3> {
        void accept(T var1, P1 var2, P2 var3, P3 var4);
    }

    @FunctionalInterface
    public interface Consumer2<T, P1, P2> {
        void accept(T var1, P1 var2, P2 var3);
    }

    @FunctionalInterface
    public interface Consumer1<T, P1> {
        void accept(T var1, P1 var2);
    }
}

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