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ImmutableStackFactoryImpl.java
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ImmutableStackFactoryImpl.java
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/*
* Copyright (c) 2016 Goldman Sachs.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompany this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.eclipse.collections.impl.stack.immutable;
import org.eclipse.collections.api.factory.stack.ImmutableStackFactory;
import org.eclipse.collections.api.stack.ImmutableStack;
import org.eclipse.collections.impl.utility.Iterate;
public class ImmutableStackFactoryImpl implements ImmutableStackFactory
{
public static final ImmutableStackFactory INSTANCE = new ImmutableStackFactoryImpl();
@Override
public <T> ImmutableStack<T> empty()
{
return (ImmutableStack<T>) ImmutableEmptyStack.INSTANCE;
}
@Override
public <T> ImmutableStack<T> of()
{
return this.empty();
}
@Override
public <T> ImmutableStack<T> with()
{
return this.empty();
}
@Override
public <T> ImmutableStack<T> of(T element)
{
return this.with(element);
}
@Override
public <T> ImmutableStack<T> with(T element)
{
return new ImmutableNotEmptyStack<>(element, this.empty());
}
@Override
public <T> ImmutableStack<T> of(T... elements)
{
return this.with(elements);
}
@Override
public <T> ImmutableStack<T> with(T... elements)
{
ImmutableStack<T> result = this.empty();
for (T element : elements)
{
result = result.push(element);
}
return result;
}
@Override
public <T> ImmutableStack<T> ofAll(Iterable<? extends T> items)
{
return this.withAll(items);
}
@Override
public <T> ImmutableStack<T> withAll(Iterable<? extends T> items)
{
ImmutableStack<T> result = this.empty();
for (T item : items)
{
result = result.push(item);
}
return result;
}
@Override
public <T> ImmutableStack<T> ofReversed(T... elements)
{
return this.withReversed(elements);
}
@Override
public <T> ImmutableStack<T> withReversed(T... elements)
{
ImmutableStack<T> result = this.empty();
for (int i = elements.length - 1; i >= 0; i--)
{
T element = elements[i];
result = result.push(element);
}
return result;
}
@Override
public <T> ImmutableStack<T> ofAllReversed(Iterable<? extends T> items)
{
return this.withAllReversed(items);
}
@Override
public <T> ImmutableStack<T> withAllReversed(Iterable<? extends T> items)
{
return this.withReversed((T[]) Iterate.toArray(items));
}
}