esripointlist.java

openmap java写的开源数字地图程序. 用applet实现,可以像google map 那样放大缩小地图.

// **********************************************************************
// 
// <copyright>
// 
//  BBN Technologies
//  10 Moulton Street
//  Cambridge, MA 02138
//  [phone]
// 
//  Copyright (C) BBNT Solutions LLC. All rights reserved.
// 
// </copyright>
// **********************************************************************
// 
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/dataAccess/shape/EsriPointList.java,v $
// $RCSfile: EsriPointList.java,v $
// $Revision: 1.5.2.2 $
// $Date: 2005/08/09 17:23:03 $
// $Author: dietrick $
// 
// **********************************************************************

package com.bbn.openmap.dataAccess.shape;

import java.util.Iterator;

import com.bbn.openmap.omGraphics.OMGraphic;
import com.bbn.openmap.omGraphics.OMGraphicList;
import com.bbn.openmap.omGraphics.OMPoint;
import com.bbn.openmap.util.Debug;

/**
 * An EsriGraphicList ensures that only EsriPoints are added to its
 * list.
 * 
 * @author Doug Van Auken
 * @author Don Dietrick
 */
public class EsriPointList extends EsriGraphicList {

    /**
     * Over-ride the add( ) method to trap for inconsistent shape
     * geometry.
     * 
     * @param shape the non-null OMGraphic to add
     */
    public void add(OMGraphic shape) {
        try {
            if (!(shape instanceof EsriPoint) && shape instanceof OMPoint) {
                shape = EsriPoint.convert((OMPoint) shape);
                // test for null in next if statement.
            }

            if (shape instanceof EsriPointList) {
                OMGraphicList list = (OMGraphicList) shape;
                EsriGraphic graphic = (EsriGraphic) list.getOMGraphicAt(0);

                if (graphic instanceof EsriPoint
                        || graphic instanceof EsriPointList) {
                    graphics.add(shape);
                    addExtents(((EsriGraphicList) shape).getExtents());
                } else if (graphic instanceof OMGraphic) {
                    // Try recursively...
                    add((OMGraphic) graphic);
                } else {
                    Debug.message("esri",
                            "EsriPointList.add()- graphic list isn't EsriPointList, can't add.");
                }
            } else if (shape instanceof EsriPoint) {
                graphics.add(shape);
                addExtents(((EsriPoint) shape).getExtents());
            } else {
                Debug.message("esri",
                        "EsriPointList.add()- graphic isn't an EsriPoint, can't add.");
                return;
            }
        } catch (ClassCastException cce) {
        }
    }

    /**
     * Get the list type in ESRI type number form - 0.
     */
    public int getType() {
        return SHAPE_TYPE_POINT;
    }

    /**
     * Construct an EsriPointList.
     */
    public EsriPointList() {
        super();
    }

    /**
     * Construct an EsriPointList with an initial capacity.
     * 
     * @param initialCapacity the initial capacity of the list
     */
    public EsriPointList(int initialCapacity) {
        super(initialCapacity);
    }

    /**
     * Construct an EsriPointList with an initial capacity and a
     * standard increment value.
     * 
     * @param initialCapacity the initial capacity of the list
     * @param capacityIncrement the capacityIncrement for resizing
     * @deprecated capacityIncrement doesn't do anything.
     */
    public EsriPointList(int initialCapacity, int capacityIncrement) {
        super(initialCapacity);
    }

    public EsriGraphic shallowCopy() {
        EsriPointList ret = new EsriPointList(size());
        ret.setAttributes(getAttributes());
        for (Iterator iter = iterator(); iter.hasNext();) {
            EsriGraphic g = (EsriGraphic) iter.next();
            ret.add((OMGraphic) g.shallowCopy());
        }
        return ret;
    }
}