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eu.lunisolar.magma.func.tuple.LCharPair 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 LBiCharConsumer.
*/
@SuppressWarnings("UnusedDeclaration")
public interface LCharPair extends LTuple, LCharSingle {
int SIZE = 2;
char first();
default char value() {
return first();
}
char 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 LCharPair and calculates hash from it. */
static int argHashCode(char a1, char a2) {
final int prime = 31;
int result = 1;
result = prime * result + Character.hashCode(a1);
result = prime * result + Character.hashCode(a2);
return result;
}
/** Static equals() implementation that takes same arguments (doubled) as fields of the LCharPair and checks if all values are equal. */
static boolean argEquals(char a1, char a2, char b1, char 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(LCharPair the, Object that) {
return Null.equals(the, that, (one, two) -> {
// Intentionally all implementations of LCharPair are allowed.
if (!(two instanceof LCharPair)) {
return false;
}
LCharPair other = (LCharPair) 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 ComparableCharPair extends LCharPair, Comparable {
@Override
default int compareTo(LCharPair that) {
return Null.compare(this, that, (one, two) -> {
int retval = 0;
return (retval = Character.compare(one.first(), two.first())) != 0 ? retval : //
(retval = Character.compare(one.second(), two.second())) != 0 ? retval : 0; //
});
}
}
abstract class AbstractCharPair implements LCharPair {
@Override
public boolean equals(Object that) {
return LCharPair.argEquals(this, that);
}
@Override
public int hashCode() {
return LCharPair.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 MutCharPair extends AbstractCharPair {
private char first;
private char second;
public MutCharPair(char a1, char a2) {
this.first = a1;
this.second = a2;
}
public static MutCharPair of(char a1, char a2) {
return new MutCharPair(a1, a2);
}
public static MutCharPair copyOf(LCharPair tuple) {
return of(tuple.first(), tuple.second());
}
public char first() {
return first;
}
public MutCharPair first(char first) {
this.first = first;
return this;
}
public char second() {
return second;
}
public MutCharPair second(char second) {
this.second = second;
return this;
}
public MutCharPair setFirst(char first) {
this.first = first;
return this;
}
/** Sets value if predicate(newValue) OR newValue::predicate is true */
public MutCharPair setFirstIfArg(char first, LCharPredicate predicate) {
if (predicate.test(first)) {
this.first = first;
}
return this;
}
/** Sets value derived from non-null argument, only if argument is not null. */
public MutCharPair setFirstIfArgNotNull(R arg, LToCharFunction func) {
if (arg != null) {
this.first = func.applyAsChar(arg);
}
return this;
}
/** Sets value if predicate(current) OR current::predicate is true */
public MutCharPair setFirstIf(LCharPredicate predicate, char 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 MutCharPair setFirstIf(char first, LBiCharPredicate 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 MutCharPair setFirstIf(LBiCharPredicate predicate, char first) {
if (predicate.test(this.first, first)) {
this.first = first;
}
return this;
}
public MutCharPair setSecond(char second) {
this.second = second;
return this;
}
/** Sets value if predicate(newValue) OR newValue::predicate is true */
public MutCharPair setSecondIfArg(char second, LCharPredicate predicate) {
if (predicate.test(second)) {
this.second = second;
}
return this;
}
/** Sets value derived from non-null argument, only if argument is not null. */
public MutCharPair setSecondIfArgNotNull(R arg, LToCharFunction func) {
if (arg != null) {
this.second = func.applyAsChar(arg);
}
return this;
}
/** Sets value if predicate(current) OR current::predicate is true */
public MutCharPair setSecondIf(LCharPredicate predicate, char 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 MutCharPair setSecondIf(char second, LBiCharPredicate 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 MutCharPair setSecondIf(LBiCharPredicate predicate, char second) {
if (predicate.test(this.second, second)) {
this.second = second;
}
return this;
}
public void reset() {
first = '\u0000';
second = '\u0000';
}
}
/**
* Mutable, comparable tuple.
*/
final class MutCompCharPair extends AbstractCharPair implements ComparableCharPair {
private char first;
private char second;
public MutCompCharPair(char a1, char a2) {
this.first = a1;
this.second = a2;
}
public static MutCompCharPair of(char a1, char a2) {
return new MutCompCharPair(a1, a2);
}
public static MutCompCharPair copyOf(LCharPair tuple) {
return of(tuple.first(), tuple.second());
}
public char first() {
return first;
}
public MutCompCharPair first(char first) {
this.first = first;
return this;
}
public char second() {
return second;
}
public MutCompCharPair second(char second) {
this.second = second;
return this;
}
public MutCompCharPair setFirst(char first) {
this.first = first;
return this;
}
/** Sets value if predicate(newValue) OR newValue::predicate is true */
public MutCompCharPair setFirstIfArg(char first, LCharPredicate predicate) {
if (predicate.test(first)) {
this.first = first;
}
return this;
}
/** Sets value derived from non-null argument, only if argument is not null. */
public MutCompCharPair setFirstIfArgNotNull(R arg, LToCharFunction func) {
if (arg != null) {
this.first = func.applyAsChar(arg);
}
return this;
}
/** Sets value if predicate(current) OR current::predicate is true */
public MutCompCharPair setFirstIf(LCharPredicate predicate, char 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 MutCompCharPair setFirstIf(char first, LBiCharPredicate 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 MutCompCharPair setFirstIf(LBiCharPredicate predicate, char first) {
if (predicate.test(this.first, first)) {
this.first = first;
}
return this;
}
public MutCompCharPair setSecond(char second) {
this.second = second;
return this;
}
/** Sets value if predicate(newValue) OR newValue::predicate is true */
public MutCompCharPair setSecondIfArg(char second, LCharPredicate predicate) {
if (predicate.test(second)) {
this.second = second;
}
return this;
}
/** Sets value derived from non-null argument, only if argument is not null. */
public MutCompCharPair setSecondIfArgNotNull(R arg, LToCharFunction func) {
if (arg != null) {
this.second = func.applyAsChar(arg);
}
return this;
}
/** Sets value if predicate(current) OR current::predicate is true */
public MutCompCharPair setSecondIf(LCharPredicate predicate, char 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 MutCompCharPair setSecondIf(char second, LBiCharPredicate 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 MutCompCharPair setSecondIf(LBiCharPredicate predicate, char second) {
if (predicate.test(this.second, second)) {
this.second = second;
}
return this;
}
public void reset() {
first = '\u0000';
second = '\u0000';
}
}
/**
* Immutable, non-comparable tuple.
*/
@Immutable
final class ImmCharPair extends AbstractCharPair {
private final char first;
private final char second;
public ImmCharPair(char a1, char a2) {
this.first = a1;
this.second = a2;
}
public static ImmCharPair of(char a1, char a2) {
return new ImmCharPair(a1, a2);
}
public static ImmCharPair copyOf(LCharPair tuple) {
return of(tuple.first(), tuple.second());
}
public char first() {
return first;
}
public char second() {
return second;
}
}
/**
* Immutable, comparable tuple.
*/
@Immutable
final class ImmCompCharPair extends AbstractCharPair implements ComparableCharPair {
private final char first;
private final char second;
public ImmCompCharPair(char a1, char a2) {
this.first = a1;
this.second = a2;
}
public static ImmCompCharPair of(char a1, char a2) {
return new ImmCompCharPair(a1, a2);
}
public static ImmCompCharPair copyOf(LCharPair tuple) {
return of(tuple.first(), tuple.second());
}
public char first() {
return first;
}
public char second() {
return second;
}
}
}
