/** * Create a Mutable variable, which can be mutated inside a Closure * * e.g. * <pre>{@code * MutableByte num = MutableByte.of(true); * * num.mutate(n->!n)) * * System.out.println(num.getAsByte()); * //prints false * } </pre> * * @param var Initial value of Mutable * @return New Mutable instance */ public static <T> MutableByte of(final byte var) { return new MutableByte( var); }
@Override public R get() { return fn.apply(host.get()); }
@Test public void testSet() { assertThat(new MutableByte().set(twenty).getAsByte(),is(twenty)); }
@Test public void testClosedVar() { assertThat(new MutableByte(ten).getAsByte(),equalTo(ten)); } @Test
@Override public void accept(final Byte t) { set(t); }
@Test public void testClosedVarHashCode() { assertThat(new MutableByte(ten).hashCode(),equalTo(new MutableByte(ten).hashCode())); } @Test
@Test public void externalGet(){ value = 100; MutableByte ext = MutableByte.fromExternal(()->value,v->this.value=v); assertThat(ext.get(),equalTo((byte)100)); } @Test
@Test public void externalSet(){ value = 0; MutableByte ext = MutableByte.fromExternal(()->value,v->this.value=v); ext.set(ten); assertThat(value,equalTo((byte)10)); }
@Override public Byte get() { return getAsByte(); }
@Test public void externalMapInputObj(){ value = 0; Mutable<Byte> ext = MutableByte.fromExternal(()->value,v->this.value=v) .mapInputToObj(s->new Byte((byte)(s+ten))); ext.set((byte)50); assertThat(value,equalTo((byte)60)); }
@Test public void externalMapOutputToObj(){ value = 20; Mutable<Integer> ext = MutableByte.fromExternal(()->value,v->this.value=v) .mapOutputToObj(s->s*2); assertThat(ext.get(),equalTo(40)); }
@Test public void inClosure2(){ MutableByte myInt = new MutableByte(zero); BiFunction<Byte,Byte,MutableByte> fn = (i,j)-> myInt.set(new Byte((byte)(i*j))); fn.apply(ten,twenty); assertThat(myInt.getAsByte(), is((byte)200)); }
@Override public Mutable<T1> set(final T1 value) { host.set(fn.apply(value)); return this; }
@Test public void testClosedVarHashCodeFalse() { assertThat(new MutableByte(ten).hashCode(),not(equalTo(new MutableByte(twenty).hashCode()))); } byte value = 0;
@Override public Byte get() { return getAsByte(); }
@Test public void inClosure(){ MutableByte myInt = new MutableByte(zero); Function<Integer,Function<Integer,MutableByte>> fn = ((Integer i)-> (Integer j)-> myInt.set(new Byte((byte)(i*j)))); fn.apply(10).apply(20); assertThat(myInt.getAsByte(), is((byte)200)); } @Test
return new MutableByte() { @Override public byte getAsByte() {