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Library providing immutable/persistent collection classes for
Java. While collections are immutable they provide methods for
adding and removing values by creating new modified copies of
themselves. Each copy shares almost all of its structure with
other copies to minimize memory consumption.
///###////////////////////////////////////////////////////////////////////////
//
// Burton Computer Corporation
// http://www.burton-computer.com
//
// Copyright (c) 2019, Burton Computer Corporation
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in
// the documentation and/or other materials provided with the
// distribution.
//
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// of its contributors may be used to endorse or promote products
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//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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package org.javimmutable.collections;
/**
* Collection of useful temporary object classes. These can be useful as simple temporary arguments
* to lambda expressions like reduce(). These classes have public fields and are not intended to
* be used for any sort of long lived objects and certainly not as part of a data model. However
* they can serve as a useful way to pass a few temporary values to a reduce method or provide
* a simple set of working variables that a lambda can update (working around the effectively
* final restriction).
*/
public class Temp
{
public static Val1 val(A a)
{
return new Val1<>(a);
}
public static Val2 val(A a,
B b)
{
return new Val2<>(a, b);
}
public static Val3 val(A a,
B b,
C c)
{
return new Val3<>(a, b, c);
}
public static Val4 val(A a,
B b,
C c,
D d)
{
return new Val4<>(a, b, c, d);
}
public static class Val1
{
public final A a;
public Val1(A a)
{
this.a = a;
}
}
public static class Val2
{
public final A a;
public final B b;
public Val2(A a,
B b)
{
this.a = a;
this.b = b;
}
}
public static class Val3
{
public final A a;
public final B b;
public final C c;
public Val3(A a,
B b,
C c)
{
this.a = a;
this.b = b;
this.c = c;
}
}
public static class Val4
{
public final A a;
public final B b;
public final C c;
public final D d;
public Val4(A a,
B b,
C c,
D d)
{
this.a = a;
this.b = b;
this.c = c;
this.d = d;
}
}
public static Var1 var(X x)
{
return new Var1<>(x);
}
public static Var2 var(X x,
Y y)
{
return new Var2<>(x, y);
}
public static Var3 var(X x,
Y y,
Z z)
{
return new Var3<>(x, y, z);
}
public static Var4 var(W w,
X x,
Y y,
Z z)
{
return new Var4<>(w, x, y, z);
}
public static class Var1
{
public X x;
public Var1(X x)
{
this.x = x;
}
}
public static class Var2
{
public X x;
public Y y;
public Var2(X x,
Y y)
{
this.x = x;
this.y = y;
}
}
public static class Var3
{
public X x;
public Y y;
public Z z;
public Var3(X x,
Y y,
Z z)
{
this.x = x;
this.y = y;
this.z = z;
}
}
public static class Var4
{
public W w;
public X x;
public Y y;
public Z z;
public Var4(W w,
X x,
Y y,
Z z)
{
this.w = w;
this.x = x;
this.y = y;
this.z = z;
}
}
public static class Int1
{
public int a;
public Int1(int a)
{
this.a = a;
}
}
public static Int1 intVar(int a)
{
return new Int1(a);
}
}