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package org.bukkit.map;

import java.util.List;
import org.bukkit.World;

/**
 * Represents a map item.
 */
public interface MapView {
    
    /**
     * An enum representing all possible scales a map can be set to.
     */
    public static enum Scale {
        CLOSEST(0),
        CLOSE(1),
        NORMAL(2),
        FAR(3),
        FARTHEST(4);
        
        private byte value;
        
        private Scale(int value) {
            this.value = (byte) value;
        }
        
        /**
         * Get the scale given the raw value.
         * @param value The raw scale
         * @return The enum scale, or null for an invalid input
         */
        public static Scale valueOf(byte value) {
            switch(value) {
                case 0: return CLOSEST;
                case 1: return CLOSE;
                case 2: return NORMAL;
                case 3: return FAR;
                case 4: return FARTHEST;
                default: return null;
            }
        }
        
        /**
         * Get the raw value of this scale level.
         * @return The scale value
         */
        public byte getValue() {
            return value;
        }
    }
    
    /**
     * Get the ID of this map item. Corresponds to the damage value of a map
     * in an inventory.
     * @return The ID of the map.
     */
    public short getId();
    
    /**
     * Check whether this map is virtual. A map is virtual if its lowermost
     * MapRenderer is plugin-provided.
     * @return Whether the map is virtual.
     */
    public boolean isVirtual();
    
    /**
     * Get the scale of this map.
     * @return The scale of the map.
     */
    public Scale getScale();
    
    /**
     * Set the scale of this map.
     * @param scale The scale to set.
     */
    public void setScale(Scale scale);
    
    /**
     * Get the center X position of this map.
     * @return The center X position.
     */
    public int getCenterX();
    
    /**
     * Get the center Z position of this map.
     * @return The center Z position.
     */
    public int getCenterZ();
    
    /**
     * Set the center X position of this map.
     * @param x The center X position.
     */
    public void setCenterX(int x);
    
    /**
     * Set the center Z position of this map.
     * @param z The center Z position.
     */
    public void setCenterZ(int z);
    
    /**
     * Get the world that this map is associated with. Primarily used by the
     * internal renderer, but may be used by external renderers. May return
     * null if the world the map is associated with is not loaded.
     * @return The World this map is associated with.
     */
    public World getWorld();
    
    /**
     * Set the world that this map is associated with. The world is used by
     * the internal renderer, and may also be used by external renderers.
     * @param world The World to associate this map with.
     */
    public void setWorld(World world);
    
    /**
     * Get a list of MapRenderers currently in effect.
     * @return A List<MapRenderer> containing each map renderer.
     */
    public List<MapRenderer> getRenderers();
    
    /**
     * Add a renderer to this map.
     * @param renderer The MapRenderer to add.
     */
    public void addRenderer(MapRenderer renderer);
    
    /**
     * Remove a renderer from this map.
     * @param renderer The MapRenderer to remove.
     * @return True if the renderer was successfully removed.
     */
    public boolean removeRenderer(MapRenderer renderer);
    
}