/** * Create a Mutable variable, which can be mutated inside a Closure * * e.g. * <pre>{@code * MutableShort num = MutableShort.of(true); * * num.mutate(n->!n)) * * System.out.println(num.getAsShort()); * //prints false * } </pre> * * @param var Initial value of Mutable * @return New Mutable instance */ public static <T> MutableShort of(final short var) { return new MutableShort( var); }
@Override public Short get() { return getAsShort(); }
@Test public void inClosure2(){ MutableShort myInt = new MutableShort(zero); BiFunction<Short,Short,MutableShort> fn = (i,j)-> myInt.set(new Short((short)(i*j))); fn.apply(ten,twenty); assertThat(myInt.getAsShort(), is((short)200)); }
@Test public void testClosedVar() { assertThat(new MutableShort(ten).getAsShort(),equalTo(ten)); } @Test
@Test public void testMutate(){ MutableShort num = MutableShort.of(twenty); Stream.of(1,2,3,4).map(i->i*10).peek(i-> num.mutate(n->new Short((short)(n+i)))).forEach(System.out::println); assertThat(num.getAsShort(),is((short)120)); } @Test
@Override public void accept(final Short t) { set(t); }
@Test public void testClosedVarHashCode() { assertThat(new MutableShort(ten).hashCode(),equalTo(new MutableShort(ten).hashCode())); } @Test
@Test public void externalSet(){ value = 0; MutableShort ext = MutableShort.fromExternal(()->value,v->this.value=v); ext.set(ten); assertThat(value,equalTo((short)10)); }
@Test public void externalGet(){ value = 100; MutableShort ext = MutableShort.fromExternal(()->value,v->this.value=v); assertThat(ext.get(),equalTo((short)100)); } @Test
@Override public R get() { return fn.apply(host.get()); }
@Test public void externalMapInputObj(){ value = 0; Mutable<Short> ext = MutableShort.fromExternal(()->value, v->this.value=v) .mapInputToObj(s->new Short((short)(s+ten))); ext.set((short)50); assertThat(value,equalTo((short)60)); }
@Test public void externalMapOutputToObj(){ value = 200; Mutable<Integer> ext = MutableShort.fromExternal(()->value,v->this.value=v) .mapOutputToObj(s->s*2); assertThat(ext.get(),equalTo(400)); }
@Test public void inClosure(){ MutableShort myInt = new MutableShort(zero); Function<Integer,Function<Integer,MutableShort>> fn = ((Integer i)-> (Integer j)-> myInt.set(new Short((short)(i*j)))); fn.apply(10).apply(20); assertThat(myInt.getAsShort(), is((short)200)); } @Test
@Override public Mutable<T1> set(final T1 value) { host.set(fn.apply(value)); return this; }
@Test public void testClosedVarHashCodeFalse() { assertThat(new MutableShort(ten).hashCode(),not(equalTo(new MutableShort(twenty).hashCode()))); } short value = 0;
@Override public R get() { return fn.apply(host.get()); }
@Test public void testSet() { assertThat(new MutableShort().set(twenty).getAsShort(),is(twenty)); }
return new MutableShort() { @Override public short getAsShort() {