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JAsync implements Async-Await fashion for Java just like es and c#. This library provide the spec of all public api.

There is a newer version: 1.0.17

package io.github.vipcxj.jasync.spec;

import io.github.vipcxj.jasync.spec.functional.*;
import io.github.vipcxj.jasync.spec.spi.PromiseProvider;

import java.util.Iterator;
import java.util.ServiceLoader;

public class Utils {

    public static PromiseProvider getProvider() {
        ServiceLoader loader = ServiceLoader.load(PromiseProvider.class);
        Iterator iterator = loader.iterator();
        if (iterator.hasNext()) {
            return iterator.next();
        } else {
            return null;
        }
    }

    public static  JPromise safeApply(PromiseFunction fuc, T v) throws Throwable {
        JPromise res = fuc != null ? fuc.apply(v) : null;
        return res != null ? res : JAsync.just();
    }

    public static JPromise safeApply(BooleanVoidPromiseFunction fuc, boolean v) throws Throwable {
        JPromise res = fuc != null ? fuc.apply(v) : null;
        return res != null ? res : JAsync.just();
    }

    public static JPromise safeApply(ByteVoidPromiseFunction fuc, byte v) throws Throwable {
        JPromise res = fuc != null ? fuc.apply(v) : null;
        return res != null ? res : JAsync.just();
    }

    public static JPromise safeApply(CharVoidPromiseFunction fuc, char v) throws Throwable {
        JPromise res = fuc != null ? fuc.apply(v) : null;
        return res != null ? res : JAsync.just();
    }

    public static JPromise safeApply(ShortVoidPromiseFunction fuc, short v) throws Throwable {
        JPromise res = fuc != null ? fuc.apply(v) : null;
        return res != null ? res : JAsync.just();
    }

    public static JPromise safeApply(IntVoidPromiseFunction fuc, int v) throws Throwable {
        JPromise res = fuc != null ? fuc.apply(v) : null;
        return res != null ? res : JAsync.just();
    }

    public static JPromise safeApply(LongVoidPromiseFunction fuc, long v) throws Throwable {
        JPromise res = fuc != null ? fuc.apply(v) : null;
        return res != null ? res : JAsync.just();
    }

    public static JPromise safeApply(FloatVoidPromiseFunction fuc, float v) throws Throwable {
        JPromise res = fuc != null ? fuc.apply(v) : null;
        return res != null ? res : JAsync.just();
    }

    public static JPromise safeApply(DoubleVoidPromiseFunction fuc, double v) throws Throwable {
        JPromise res = fuc != null ? fuc.apply(v) : null;
        return res != null ? res : JAsync.just();
    }

    public static JPromise safeGetVoid(VoidPromiseSupplier fuc) throws Throwable {
        JPromise res = fuc != null ? fuc.get() : null;
        return res != null ? res : JAsync.just();
    }

    public static  JPromise safeGet(PromiseSupplier fuc) throws Throwable {
        JPromise res = fuc != null ? fuc.get() : null;
        return res != null ? res : JAsync.just();
    }

    public static boolean safeTest(BooleanSupplier fun) throws Throwable {
        return fun != null && fun.getAsBoolean();
    }

    public static JPromise safeTest(PromiseSupplier fun) throws Throwable {
        JPromise res = fun != null ? fun.get() : null;
        return res != null ? res.then(test -> JAsync.just(Boolean.TRUE.equals(test))) : JAsync.just(false);
    }
}