// functional/FunctionVariants.java

// (c)2016 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://mindviewinc.com/Books/OnJava/ for more book information.

import java.util.function.*;

class Foo {}

class Bar {

Foo f;

public Bar(Foo f) { this.f = f; }

}

class IBaz {

int i;

public IBaz(int i) {

this.i = i;

}

}

class LBaz {

long l;

public LBaz(long l) {

this.l = l;

}

}

class DBaz {

double d;

public DBaz(double d) {

this.d = d;

}

}

public class FunctionVariants {

static Function<Foo,Bar> f1 = f -> new Bar(f);

static IntFunction<IBaz> f2 = i -> new IBaz(i);

static LongFunction<LBaz> f3 = l -> new LBaz(l);

static DoubleFunction<DBaz> f4 = d -> new DBaz(d);

static ToIntFunction<IBaz> f5 = ib -> ib.i;

static ToLongFunction<LBaz> f6 = lb -> lb.l;

static ToDoubleFunction<DBaz> f7 = db -> db.d;

static IntToLongFunction f8 = i -> i;

static IntToDoubleFunction f9 = i -> i;

static LongToIntFunction f10 = l -> (int)l;

static LongToDoubleFunction f11 = l -> l;

static DoubleToIntFunction f12 = d -> (int)d;

static DoubleToLongFunction f13 = d -> (long)d;

public static void main(String[] args) {

Bar b = f1.apply(new Foo());

IBaz ib = f2.apply(11);

LBaz lb = f3.apply(11);

DBaz db = f4.apply(11);

int i = f5.applyAsInt(ib);

long l = f6.applyAsLong(lb);

double d = f7.applyAsDouble(db);

l = f8.applyAsLong(12);

d = f9.applyAsDouble(12);

i = f10.applyAsInt(12);

d = f11.applyAsDouble(12);

i = f12.applyAsInt(13.0);

l = f13.applyAsLong(13.0);

}

}