/*
* Copyright (c) 2011-2017 Pivotal Software Inc, All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package reactor.util.function;
import java.util.
Objects;
import java.util.function.
Function;
import reactor.util.annotation.
NonNull;
import reactor.util.annotation.
Nullable;
/**
* A tuple that holds four non-null values
*
* @param <T1> The type of the first non-null value held by this tuple
* @param <T2> The type of the second non-null value held by this tuple
* @param <T3> The type of the third non-null value held by this tuple
* @param <T4> The type of the fourth non-null value held by this tuple
* @author Jon Brisbin
* @author Stephane Maldini
*/
public class
Tuple4<T1, T2, T3, T4> extends
Tuple3<T1, T2, T3> {
private static final long
serialVersionUID = -4898704078143033129L;
@
NonNull final T4
t4;
Tuple4(T1
t1, T2
t2, T3
t3, T4
t4) {
super(
t1,
t2,
t3);
this.
t4 =
Objects.
requireNonNull(
t4, "t4");
}
/**
* Type-safe way to get the fourth object of this {@link Tuples}.
*
* @return The fourth object
*/
public T4
getT4() {
return
t4;
}
/**
* Map the 1st part (T1) of this {@link Tuple4} into a different value and type,
* keeping the other parts.
*
* @param mapper the mapping {@link Function} for the T1 part
* @param <R> the new type for the T1 part
* @return a new {@link Tuple4} with a different T1 value
*/
public <R>
Tuple4<R, T2, T3, T4>
mapT1(
Function<T1, R>
mapper) {
return new
Tuple4<>(
mapper.
apply(
t1),
t2,
t3,
t4);
}
/**
* Map the 2nd part (T2) of this {@link Tuple4} into a different value and type,
* keeping the other parts.
*
* @param mapper the mapping {@link Function} for the T2 part
* @param <R> the new type for the T2 part
* @return a new {@link Tuple4} with a different T2 value
*/
public <R>
Tuple4<T1, R, T3, T4>
mapT2(
Function<T2, R>
mapper) {
return new
Tuple4<>(
t1,
mapper.
apply(
t2),
t3,
t4);
}
/**
* Map the 3rd part (T3) of this {@link Tuple4} into a different value and type,
* keeping the other parts.
*
* @param mapper the mapping {@link Function} for the T3 part
* @param <R> the new type for the T3 part
* @return a new {@link Tuple4} with a different T3 value
*/
public <R>
Tuple4<T1, T2, R, T4>
mapT3(
Function<T3, R>
mapper) {
return new
Tuple4<>(
t1,
t2,
mapper.
apply(
t3),
t4);
}
/**
* Map the 4th part (T4) of this {@link Tuple4} into a different value and type,
* keeping the other parts.
*
* @param mapper the mapping {@link Function} for the T4 part
* @param <R> the new type for the T4 part
* @return a new {@link Tuple4} with a different T4 value
*/
public <R>
Tuple4<T1, T2, T3, R>
mapT4(
Function<T4, R>
mapper) {
return new
Tuple4<>(
t1,
t2,
t3,
mapper.
apply(
t4));
}
@
Nullable
@
Override
public
Object get(int
index) {
switch (
index) {
case 0:
return
t1;
case 1:
return
t2;
case 2:
return
t3;
case 3:
return
t4;
default:
return null;
}
}
@
Override
public
Object[]
toArray() {
return new
Object[]{
t1,
t2,
t3,
t4};
}
@
Override
public boolean
equals(@
Nullable Object o) {
if (this ==
o) return true;
if (!(
o instanceof
Tuple4)) return false;
if (!super.equals(
o)) return false;
@
SuppressWarnings("rawtypes")
Tuple4 tuple4 = (
Tuple4)
o;
return
t4.
equals(
tuple4.
t4);
}
@
Override
public int
hashCode() {
int
result = super.hashCode();
result = 31 *
result +
t4.
hashCode();
return
result;
}
@
Override
public int
size() {
return 4;
}
}