org.osmdroid.mtp.adt.OSMTileInfo Maven / Gradle / Ivy

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A tool to package OpenStreetMap tiles
There is a newer version: 6.1.20
// Created by plusminus on 00:37:01 - 19.12.2008
package org.osmdroid.mtp.adt;

public class OSMTileInfo {
    // ===========================================================
    // Constants
    // ===========================================================

    private static final int POSITION_IN_PARENT_LEFT = 1;
    private static final int POSITION_IN_PARENT_RIGHT = 2;
    private static final int POSITION_IN_PARENT_BOTTOM = 4;
    private static final int POSITION_IN_PARENT_TOP = 8;

    public static final int POSITION_IN_PARENT_TOPLEFT = POSITION_IN_PARENT_LEFT | POSITION_IN_PARENT_TOP;
    public static final int POSITION_IN_PARENT_TOPRIGHT = POSITION_IN_PARENT_RIGHT | POSITION_IN_PARENT_TOP;
    public static final int POSITION_IN_PARENT_BOTTOMRIGHT = POSITION_IN_PARENT_RIGHT | POSITION_IN_PARENT_BOTTOM;
    public static final int POSITION_IN_PARENT_BOTTOMLEFT = POSITION_IN_PARENT_LEFT | POSITION_IN_PARENT_BOTTOM;


    // ===========================================================
    // Fields
    // ===========================================================

    public final int x, y, zoom;

    // ===========================================================
    // Constructors
    // ===========================================================

    public OSMTileInfo(final int x, final int y, final int zoom) {
        this.x = x;
        this.y = y;
        this.zoom = zoom;
    }

    // ===========================================================
    // Getter & Setter
    // ===========================================================

    public OSMTileInfo getParentTile() {
        return new OSMTileInfo(this.x / 2, this.y / 2, this.zoom - 1);
    }

    /**
     * @param child
     * @param parent
     * @return
     */
    public int getPositionInParent(final OSMTileInfo pParent) {
        final int childShouldUpperLeftX = pParent.x * 2;
        final int childShouldUpperLeftY = pParent.y * 2;

        int out = (childShouldUpperLeftX == this.x) ? POSITION_IN_PARENT_LEFT : POSITION_IN_PARENT_RIGHT;
        out += (childShouldUpperLeftY == this.y) ? POSITION_IN_PARENT_TOP : POSITION_IN_PARENT_BOTTOM;
        return out;
    }

    // ===========================================================
    // Methods from SuperClass/Interfaces
    // ===========================================================

    @Override
    public int hashCode() {
        return ((x << 19) & 0xFFF80000) | ((y << 6) & 0x0007FFC0) | zoom;
    }

    @Override
    public boolean equals(final Object o) {
        if (o != null && o instanceof OSMTileInfo) {
            final OSMTileInfo other = (OSMTileInfo) o;
            return other.x == x && other.y == y && other.zoom == zoom;
        } else {
            return super.equals(o);
        }
    }

    @Override
    public String toString() {
        return new StringBuilder()
                .append("z=").append(this.zoom)
                .append(" x=").append(this.x)
                .append(" y=").append(this.y)
                .toString();
    }

    // ===========================================================
    // Methods
    // ===========================================================

    // ===========================================================
    // Inner and Anonymous Classes
    // ===========================================================
}