Application: gvSIG desktop

/*

 * Created on 21-jun-2006

 *

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

 *

 * $Id: GeoprocessTree.java 6019 2006-06-23 19:04:23Z azabala $

 * $Log$

 * Revision 1.2  2006-06-23 19:04:23  azabala

 * bug for tree creation by namespacies resolved

 *

 * Revision 1.1  2006/06/22 17:46:30  azabala

 * first version in cvs

 *

 *

 */

package com.iver.cit.gvsig.geoprocess.manager;

import java.util.Iterator;

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTree;

import javax.swing.event.TreeSelectionListener;

import javax.swing.tree.DefaultMutableTreeNode;

import javax.swing.tree.TreeSelectionModel;

import com.iver.cit.gvsig.geoprocess.core.IGeoprocessPlugin;

import com.iver.cit.gvsig.geoprocess.impl.buffer.BufferGeoprocessPlugin;

import com.iver.cit.gvsig.geoprocess.impl.clip.ClipGeoprocessPlugin;

import com.iver.utiles.extensionPoints.ExtensionPoint;

import com.iver.utiles.extensionPoints.ExtensionPoints;

import com.iver.utiles.extensionPoints.ExtensionPointsSingleton;

/**

 * This component shows all registered geoprocesses in extension point

 * "GeoprocessManager", in a tree style.

 * 

 * Its tree hasnt root node, and different subnodes represents an organization

 * of geoprocesses.

 * 

 * Leaf nodes are IGeoprocessPlugin instances.

 * 

 * @author azabala

 * 

 */

public class GeoprocessTree extends JScrollPane implements IGeoprocessTree {

        private JTree tree;

        DefaultMutableTreeNode root;

        final  GeoprocessTreeDirectory ROOT = new GeoprocessTreeDirectory();

        public GeoprocessTree() {

                super();

                root = new DefaultMutableTreeNode();

                root.setUserObject(ROOT);

                tree = new JTree(root);

                loadGeoprocesses();

                tree.getSelectionModel().setSelectionMode(

                                TreeSelectionModel.SINGLE_TREE_SELECTION);

//                tree.setRootVisible(false);

                tree.setShowsRootHandles(true);

                setViewportView(tree);

                // tree.setCellRenderer( new JTreeEntidadesRenderer(listeners) );

        }

        public static void main(String[] args){

                JFrame f = new JFrame();

                //ESTO SE HARA EN EL METODO INITIALIZE DE CADA EXTENSION

                ExtensionPoints extensionPoints = 

                        ExtensionPointsSingleton.getInstance();

                extensionPoints.add("GeoprocessManager","BUFFER", BufferGeoprocessPlugin.class);

                extensionPoints.add("GeoprocessManager","CLIP", ClipGeoprocessPlugin.class);

                //REVISAR ESTO ULTIMO, PUES EST? PETANDO

//                GeoprocessTree tree = new GeoprocessTree();

                GeoprocessManager tree = new GeoprocessManager();

                f.getContentPane().add(tree);

                f.setSize(800,600);

                f.setVisible(true);

        }

        private void loadGeoprocesses() {

                ExtensionPoints extensionPoints = 

                        ExtensionPointsSingleton.getInstance();

                ExtensionPoint geoprocessManager = 

                        (ExtensionPoint)extensionPoints.get("GeoprocessManager"); 

                if(geoprocessManager == null)

                        return;

                Iterator i = geoprocessManager.keySet().iterator();

                while( i.hasNext() ) { 

                        String nombre = (String)i.next(); 

                        Class metadataClass =

                                (Class) geoprocessManager.get(nombre);

                        try {

                                register((IGeoprocessPlugin)metadataClass.newInstance());

                        } catch (InstantiationException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                        } catch (IllegalAccessException e) {

                                // TODO Auto-generated catch block

                                e.printStackTrace();

                        }

                }

        }

        public void register(IGeoprocessPlugin metadata) {

                String namespace = metadata.getNamespace();

                String[] directories = getObjectsInPath(namespace);

                DefaultMutableTreeNode bestMatch = root;

                DefaultMutableTreeNode scanned = null;

                int levelNum = 0;

                boolean doit = true;

                while(doit){

                        int numChilds = bestMatch.getChildCount();

                        if(numChilds == 0)

                                break;

                        boolean match = true;

                        for(int i = 0; i < numChilds; i++){

                                scanned =

                                        (DefaultMutableTreeNode) bestMatch.getChildAt(i);

                                if(scanned.isLeaf() || 

                                                (scanned.getUserObject() instanceof IGeoprocessPlugin))//this is a geoprocess, not a directory

                                {

                                        doit = false;

                                        if(scanned.getUserObject().getClass() == metadata.getClass()){

                                                //we are trying to add the same geoprocess twice

                                                return;

                                        }        

                                        break;

                                }

                                GeoprocessTreeDirectory path =

                                        (GeoprocessTreeDirectory) scanned.getUserObject();

                                String[] pathStr = path.getPath();

                                //verify the length of the path

                                for(int j = 0; j < pathStr.length; j++){

                                        if(!pathStr[j].equalsIgnoreCase(directories[j])){

                                                match = false;

                                                break;

                                        }

                                }//for num paths

                                if(match){

                                        bestMatch = scanned;

                                        break;

                                }

                        }//for numChilds

                        if(! match)//si en el escaneo de nivel no se encontro nada, paramos

                                doit = false;

                        else

                                levelNum++;

                }//while

                //Llegados a este punto, tenemos el nodo que mejor casa

                //si el numero de niveles recorridos es directories.length -1

                //lo a?adimos directamente. Si no, hay que crear nuevos niveles

                DefaultMutableTreeNode gpNode

                        = new DefaultMutableTreeNode();

                gpNode.setUserObject(metadata);

                if(levelNum == directories.length -1){

                        bestMatch.add(gpNode);

                }else{

                        int numNewNodes = (directories.length - 1) - levelNum;

                        DefaultMutableTreeNode prev = bestMatch;

                        for(int i = 0; i < numNewNodes; i++){

                                DefaultMutableTreeNode newNode = 

                                        new DefaultMutableTreeNode();

                                GeoprocessTreeDirectory path

                                        = new GeoprocessTreeDirectory();

                                String[] newPath = new String[levelNum + i + 1];

                                System.arraycopy(directories, 0, newPath, 0, (levelNum + i + 1));

                                path.path = newPath;

                                newNode.setUserObject(path);

                                String packageName = "";

                                for(int j = 0; j < newPath.length -1; j++){

                                        packageName += newPath[j];

                                        packageName += "/";

                                }

                                packageName += newPath[newPath.length -1];

                                String description = metadata.

                                        getDescriptionForPackage(packageName);

                                path.description = description;

                                prev.add(newNode);

                                prev = newNode;

                        }//for

                        prev.add(gpNode);

                }//else

        }

        public IGeoprocessPlugin getGeoprocess() {

                DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree

                                .getLastSelectedPathComponent();

                Object nodeInfo = node.getUserObject();

                if ((node == null) || !(nodeInfo instanceof IGeoprocessPlugin))

                        return null;

                else {

                        return (IGeoprocessPlugin)nodeInfo;

                }

        }

        /**

         * A directory of the geoprocesses path.

         * 

         * @author azabala

         * 

         */

        class GeoprocessTreeDirectory {

                String[] path;

                String description;

                public boolean equals(Object o) {

                        if (!(o instanceof GeoprocessTreeDirectory))

                                return false;

                        GeoprocessTreeDirectory d = (GeoprocessTreeDirectory) o;

                        for(int i = 0; i < path.length; i++){

                                if(!path[i].equalsIgnoreCase(d.path[i]))

                                        return false;

                        }

                        return true;

                }

                public String[] getPath() {

                        return path;

                }

                public String getDescription() {

                        return description;

                }

                public String toString(){

                        if(path != null && path.length > 0)

                                return path[path.length-1];

                        else

                                return "GpGvSig";

                }

        }

        private String[] getObjectsInPath(String path) {

                return path.split(PATH_SEPARATOR);

        }

        public void addTreeSelectionListener(TreeSelectionListener l) {

                tree.addTreeSelectionListener(l);

        }

}