org.javimmutable.collections.array.bit32.SingleBit32Array Maven / Gradle / Ivy

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///###////////////////////////////////////////////////////////////////////////
//
// Burton Computer Corporation
// http://www.burton-computer.com
//
// Copyright (c) 2014, Burton Computer Corporation
// All rights reserved.
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//
//     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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package org.javimmutable.collections.array.bit32;

import org.javimmutable.collections.Cursor;
import org.javimmutable.collections.Holder;
import org.javimmutable.collections.Holders;
import org.javimmutable.collections.JImmutableMap;
import org.javimmutable.collections.cursors.SingleValueCursor;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;

@Immutable
public class SingleBit32Array
        extends Bit32Array
        implements JImmutableMap.Entry
{
    private final int index;
    private final T value;

    SingleBit32Array(int index,
                     T value)
    {
        this.index = index;
        this.value = value;
    }

    @Override
    @Nullable
    public T getValueOr(int index,
                        @Nullable T defaultValue)
    {
        checkIndex(index);
        return (this.index == index) ? value : defaultValue;
    }

    @Nonnull
    @Override
    public Holder find(int index)
    {
        checkIndex(index);
        return (this.index == index) ? Holders.of(value) : Holders.of();
    }

    @Nonnull
    @Override
    public Bit32Array assign(int index,
                                @Nullable T value)
    {
        checkIndex(index);
        if (this.index == index) {
            return (this.value != value) ? new SingleBit32Array(index, value) : this;
        } else {
            return new StandardBit32Array(this.index, this.value, index, value);
        }
    }

    @Nonnull
    @Override
    public Bit32Array delete(int index)
    {
        checkIndex(index);
        return (this.index == index) ? Bit32Array.of() : this;
    }

    @Override
    public int size()
    {
        return 1;
    }

    @Override
    public int firstIndex()
    {
        return index;
    }

    @Nonnull
    @Override
    public Integer getKey()
    {
        return index;
    }

    @Override
    public T getValue()
    {
        return value;
    }

    @Override
    public boolean isEmpty()
    {
        return false;
    }

    @Override
    @Nonnull
    public Cursor> cursor()
    {
        return SingleValueCursor.>of(this);
    }
}