NonNullList.java

package net.minecraft.util;

import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import org.apache.commons.lang3.Validate;

public class NonNullList<E> extends AbstractList<E>
{
    private final List<E> field_191198_a;
    private final E field_191199_b;

    public static <E> NonNullList<E> func_191196_a()
    {
        return new NonNullList();
    }

    public static <E> NonNullList<E> func_191197_a(int p_191197_0_, E p_191197_1_)
    {
        Validate.notNull(p_191197_1_);
        Object[] aobject = new Object[p_191197_0_];
        Arrays.fill(aobject, p_191197_1_);
        return new NonNullList(Arrays.asList(aobject), p_191197_1_);
    }

    protected NonNullList()
    {
        this(new ArrayList(), null);
    }

    protected NonNullList(List<E> p_i47327_1_, @Nullable E p_i47327_2_)
    {
        this.field_191198_a = p_i47327_1_;
        this.field_191199_b = p_i47327_2_;
    }

    @Nonnull
    public E get(int p_get_1_)
    {
        return this.field_191198_a.get(p_get_1_);
    }

    public E set(int p_set_1_, E p_set_2_)
    {
        Validate.notNull(p_set_2_);
        return this.field_191198_a.set(p_set_1_, p_set_2_);
    }

    public void add(int p_add_1_, E p_add_2_)
    {
        Validate.notNull(p_add_2_);
        this.field_191198_a.add(p_add_1_, p_add_2_);
    }

    public E remove(int p_remove_1_)
    {
        return this.field_191198_a.remove(p_remove_1_);
    }

    public int size()
    {
        return this.field_191198_a.size();
    }

    public void clear()
    {
        if (this.field_191199_b == null)
        {
            super.clear();
        }
        else
        {
            for (int i = 0; i < this.size(); ++i)
            {
                this.set(i, this.field_191199_b);
            }
        }
    }
}