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eu.lunisolar.magma.func.tuple.LIntPair Maven / Gradle / Ivy
/*
* This file is part of "lunisolar-magma".
*
* (C) Copyright 2014-2019 Lunisolar (http://lunisolar.eu/).
*
* 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 eu.lunisolar.magma.func.tuple;
import eu.lunisolar.magma.basics.meta.LTuple;
import eu.lunisolar.magma.basics.Null;
import eu.lunisolar.magma.basics.fluent.Fluent;
import eu.lunisolar.magma.func.function.LFunction;
import eu.lunisolar.magma.func.function.to.*;
import eu.lunisolar.magma.func.operator.unary.*;
import eu.lunisolar.magma.func.operator.binary.*;
import eu.lunisolar.magma.func.predicate.*;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import java.util.*;
/**
* Exact equivalent of input parameters used in LBiIntConsumer.
*/
@SuppressWarnings("UnusedDeclaration")
public interface LIntPair extends LTuple, LIntSingle {
int SIZE = 2;
int first();
default int value() {
return first();
}
int second();
default Object get(int index) {
switch (index) {
case 1 :
return first();
case 2 :
return second();
default :
throw new NoSuchElementException();
}
}
/** Tuple size */
default int size() {
return SIZE;
}
/** Static hashCode() implementation method that takes same arguments as fields of the LIntPair and calculates hash from it. */
static int argHashCode(int a1, int a2) {
final int prime = 31;
int result = 1;
result = prime * result + Integer.hashCode(a1);
result = prime * result + Integer.hashCode(a2);
return result;
}
/** Static equals() implementation that takes same arguments (doubled) as fields of the LIntPair and checks if all values are equal. */
static boolean argEquals(int a1, int a2, int b1, int b2) {
return a1 == b1 && //
a2 == b2; //
}
/**
* Static equals() implementation that takes two tuples asnd checks if they are equal.
*
* Tuples are considered equal if are implementing same interface and their tuple values are equal regardless of the implementing class.
*/
static boolean argEquals(LIntPair the, Object that) {
return Null.equals(the, that, (one, two) -> {
// Intentionally all implementations of LIntPair are allowed.
if (!(two instanceof LIntPair)) {
return false;
}
LIntPair other = (LIntPair) two;
return argEquals(one.first(), one.second(), other.first(), other.second());
});
}
default Iterator iterator() {
return new Iterator() {
private int index;
@Override
public boolean hasNext() {
return index < SIZE;
}
@Override
public Object next() {
index++;
return get(index);
}
};
}
interface ComparableIntPair extends LIntPair, Comparable {
@Override
default int compareTo(LIntPair that) {
return Null.compare(this, that, (one, two) -> {
int retval = 0;
return (retval = Integer.compare(one.first(), two.first())) != 0 ? retval : //
(retval = Integer.compare(one.second(), two.second())) != 0 ? retval : 0; //
});
}
}
abstract class AbstractIntPair implements LIntPair {
@Override
public boolean equals(Object that) {
return LIntPair.argEquals(this, that);
}
@Override
public int hashCode() {
return LIntPair.argHashCode(first(), second());
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append('(');
sb.append(first());
sb.append(',');
sb.append(second());
sb.append(')');
return sb.toString();
}
}
/**
* Mutable, non-comparable tuple.
*/
final class MutIntPair extends AbstractIntPair {
private int first;
private int second;
public MutIntPair(int a1, int a2) {
this.first = a1;
this.second = a2;
}
public static MutIntPair of(int a1, int a2) {
return new MutIntPair(a1, a2);
}
public static MutIntPair copyOf(LIntPair tuple) {
return of(tuple.first(), tuple.second());
}
public int first() {
return first;
}
public MutIntPair first(int first) {
this.first = first;
return this;
}
public int second() {
return second;
}
public MutIntPair second(int second) {
this.second = second;
return this;
}
public MutIntPair setFirst(int first) {
this.first = first;
return this;
}
/** Sets value if predicate(newValue) OR newValue::predicate is true */
public MutIntPair setFirstIfArg(int first, LIntPredicate predicate) {
if (predicate.test(first)) {
this.first = first;
}
return this;
}
/** Sets value derived from non-null argument, only if argument is not null. */
public MutIntPair setFirstIfArgNotNull(R arg, LToIntFunction func) {
if (arg != null) {
this.first = func.applyAsInt(arg);
}
return this;
}
/** Sets value if predicate(current) OR current::predicate is true */
public MutIntPair setFirstIf(LIntPredicate predicate, int first) {
if (predicate.test(this.first)) {
this.first = first;
}
return this;
}
/** Sets new value if predicate predicate(newValue, current) OR newValue::something(current) is true. */
public MutIntPair setFirstIf(int first, LBiIntPredicate predicate) {
// the order of arguments is intentional, to allow predicate:
if (predicate.test(first, this.first)) {
this.first = first;
}
return this;
}
/** Sets new value if predicate predicate(current, newValue) OR current::something(newValue) is true. */
public MutIntPair setFirstIf(LBiIntPredicate predicate, int first) {
if (predicate.test(this.first, first)) {
this.first = first;
}
return this;
}
public MutIntPair setSecond(int second) {
this.second = second;
return this;
}
/** Sets value if predicate(newValue) OR newValue::predicate is true */
public MutIntPair setSecondIfArg(int second, LIntPredicate predicate) {
if (predicate.test(second)) {
this.second = second;
}
return this;
}
/** Sets value derived from non-null argument, only if argument is not null. */
public MutIntPair setSecondIfArgNotNull(R arg, LToIntFunction func) {
if (arg != null) {
this.second = func.applyAsInt(arg);
}
return this;
}
/** Sets value if predicate(current) OR current::predicate is true */
public MutIntPair setSecondIf(LIntPredicate predicate, int second) {
if (predicate.test(this.second)) {
this.second = second;
}
return this;
}
/** Sets new value if predicate predicate(newValue, current) OR newValue::something(current) is true. */
public MutIntPair setSecondIf(int second, LBiIntPredicate predicate) {
// the order of arguments is intentional, to allow predicate:
if (predicate.test(second, this.second)) {
this.second = second;
}
return this;
}
/** Sets new value if predicate predicate(current, newValue) OR current::something(newValue) is true. */
public MutIntPair setSecondIf(LBiIntPredicate predicate, int second) {
if (predicate.test(this.second, second)) {
this.second = second;
}
return this;
}
public void reset() {
first = 0;
second = 0;
}
}
/**
* Mutable, comparable tuple.
*/
final class MutCompIntPair extends AbstractIntPair implements ComparableIntPair {
private int first;
private int second;
public MutCompIntPair(int a1, int a2) {
this.first = a1;
this.second = a2;
}
public static MutCompIntPair of(int a1, int a2) {
return new MutCompIntPair(a1, a2);
}
public static MutCompIntPair copyOf(LIntPair tuple) {
return of(tuple.first(), tuple.second());
}
public int first() {
return first;
}
public MutCompIntPair first(int first) {
this.first = first;
return this;
}
public int second() {
return second;
}
public MutCompIntPair second(int second) {
this.second = second;
return this;
}
public MutCompIntPair setFirst(int first) {
this.first = first;
return this;
}
/** Sets value if predicate(newValue) OR newValue::predicate is true */
public MutCompIntPair setFirstIfArg(int first, LIntPredicate predicate) {
if (predicate.test(first)) {
this.first = first;
}
return this;
}
/** Sets value derived from non-null argument, only if argument is not null. */
public MutCompIntPair setFirstIfArgNotNull(R arg, LToIntFunction func) {
if (arg != null) {
this.first = func.applyAsInt(arg);
}
return this;
}
/** Sets value if predicate(current) OR current::predicate is true */
public MutCompIntPair setFirstIf(LIntPredicate predicate, int first) {
if (predicate.test(this.first)) {
this.first = first;
}
return this;
}
/** Sets new value if predicate predicate(newValue, current) OR newValue::something(current) is true. */
public MutCompIntPair setFirstIf(int first, LBiIntPredicate predicate) {
// the order of arguments is intentional, to allow predicate:
if (predicate.test(first, this.first)) {
this.first = first;
}
return this;
}
/** Sets new value if predicate predicate(current, newValue) OR current::something(newValue) is true. */
public MutCompIntPair setFirstIf(LBiIntPredicate predicate, int first) {
if (predicate.test(this.first, first)) {
this.first = first;
}
return this;
}
public MutCompIntPair setSecond(int second) {
this.second = second;
return this;
}
/** Sets value if predicate(newValue) OR newValue::predicate is true */
public MutCompIntPair setSecondIfArg(int second, LIntPredicate predicate) {
if (predicate.test(second)) {
this.second = second;
}
return this;
}
/** Sets value derived from non-null argument, only if argument is not null. */
public MutCompIntPair setSecondIfArgNotNull(R arg, LToIntFunction func) {
if (arg != null) {
this.second = func.applyAsInt(arg);
}
return this;
}
/** Sets value if predicate(current) OR current::predicate is true */
public MutCompIntPair setSecondIf(LIntPredicate predicate, int second) {
if (predicate.test(this.second)) {
this.second = second;
}
return this;
}
/** Sets new value if predicate predicate(newValue, current) OR newValue::something(current) is true. */
public MutCompIntPair setSecondIf(int second, LBiIntPredicate predicate) {
// the order of arguments is intentional, to allow predicate:
if (predicate.test(second, this.second)) {
this.second = second;
}
return this;
}
/** Sets new value if predicate predicate(current, newValue) OR current::something(newValue) is true. */
public MutCompIntPair setSecondIf(LBiIntPredicate predicate, int second) {
if (predicate.test(this.second, second)) {
this.second = second;
}
return this;
}
public void reset() {
first = 0;
second = 0;
}
}
/**
* Immutable, non-comparable tuple.
*/
@Immutable
final class ImmIntPair extends AbstractIntPair {
private final int first;
private final int second;
public ImmIntPair(int a1, int a2) {
this.first = a1;
this.second = a2;
}
public static ImmIntPair of(int a1, int a2) {
return new ImmIntPair(a1, a2);
}
public static ImmIntPair copyOf(LIntPair tuple) {
return of(tuple.first(), tuple.second());
}
public int first() {
return first;
}
public int second() {
return second;
}
}
/**
* Immutable, comparable tuple.
*/
@Immutable
final class ImmCompIntPair extends AbstractIntPair implements ComparableIntPair {
private final int first;
private final int second;
public ImmCompIntPair(int a1, int a2) {
this.first = a1;
this.second = a2;
}
public static ImmCompIntPair of(int a1, int a2) {
return new ImmCompIntPair(a1, a2);
}
public static ImmCompIntPair copyOf(LIntPair tuple) {
return of(tuple.first(), tuple.second());
}
public int first() {
return first;
}
public int second() {
return second;
}
}
}
