Alachisoft.NCache.Common.DataStructures.VirtualIndex Maven / Gradle / Ivy

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package Alachisoft.NCache.Common.DataStructures;

public class VirtualIndex implements java.lang.Comparable {

    private static final int maxSize = 79 * 1024;
    private int x, y;

    public VirtualIndex() {
    }

    public VirtualIndex(int index) {
        IncrementBy(index);
    }

    public final void Increment() {
        x++;
        if (x == maxSize) {
            x = 0;
            y++;
        }
    }

    public final void IncrementBy(int count) {
        int number = (this.y * maxSize) + this.x + count;
        this.x = number % maxSize;
        this.y = number / maxSize;
    }

    public final int getXIndex() {
        return x;
    }

    public final int getYIndex() {
        return y;
    }

    public final int getIndexValue() {
        return (y * maxSize) + x;
    }

    public final VirtualIndex clone() {
        VirtualIndex clone = new VirtualIndex();
        clone.x = x;
        clone.y = y;
        return clone;
    }

    //
    public final int compareTo(Object obj) {
        VirtualIndex other = null;
        if (obj instanceof VirtualIndex) {
            other = (VirtualIndex) ((obj instanceof VirtualIndex) ? obj : null);
        } else if (obj instanceof Integer) {
            other = new VirtualIndex((Integer) obj);
        } else {
            return -1;
        }

        if (other.getIndexValue() == getIndexValue()) {
            return 0;
        } else if (other.getIndexValue() > getIndexValue()) {
            return -1;
        } else {
            return 1;
        }
    }
    //
}