Application: gvSIG desktop » gvSIG raster

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

package org.gvsig.raster.impl.store;

import java.lang.reflect.Constructor;

import java.lang.reflect.InvocationTargetException;

import java.util.List;

import org.gvsig.fmap.dal.coverage.datastruct.Param;

import org.gvsig.fmap.dal.coverage.datastruct.Params;

import org.gvsig.fmap.dal.coverage.grid.RegistrableFilterListener;

import org.gvsig.raster.util.persistence.GenericPersistentObject;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.extensionpoint.ExtensionPoint;

import org.gvsig.tools.extensionpoint.ExtensionPointManager;

import org.gvsig.tools.persistence.PersistenceManager;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.persistence.exception.PersistenceException;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * Generic parameter to store data for filters

 *

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class ParamImpl implements Param {

        private Logger   log          = LoggerFactory.getLogger(ParamImpl.class);

        private int      type         = -1;

        private String   id           = null;

        private Object   defaultValue = null;

        private String[] list         = null;

        private String   managerID     = null;

        public void setManagerID(String id) {

                managerID = id;

        }

        public int getType() {

                return type;

        }

        public void setType(int type) {

                this.type = type;

        }

        public String getId() {

                return id;

        }

        public void setId(String id) {

                this.id = id;

        }

        public Object getDefaultValue() {

                return defaultValue;

        }

        public void setDefaultValue(Object defaultValue) {

                this.defaultValue = defaultValue;

        }

        public String[] getList() {

                return list;

        }

        public void setList(String[] list) {

                this.list = list;

        }

        @SuppressWarnings("unchecked")

        public void loadFromState(PersistentState state) throws PersistenceException {

                this.type = state.getInt("type");

                this.id = state.getString("id");

                if(state.get("defaultValue") == null) {

                        loadPanel(state);

                } else

                        this.defaultValue = ((GenericPersistentObject)state.get("defaultValue")).getObject();

                List<String> list = state.getList("list");

                if(list != null) {

                        this.list = new String[list.size()];

                        for (int i = 0; i < list.size(); i++) {

                                this.list[i] = list.get(i);

                        }

                }

        }

        private void loadPanel(PersistentState state) throws PersistenceException {

                this.managerID = state.getString("managerID");

                Params paramsForUI = (Params)state.get("paramsForUI");

                RegistrableFilterListener panel = (RegistrableFilterListener)getPanelObject(managerID);

                panel.setParams(paramsForUI);

                this.defaultValue = panel;

        }

        private Object getPanelObject(String filterID) {

                try {

                        ExtensionPointManager extensionPoints = ToolsLocator.getExtensionPointManager();

                        ExtensionPoint point = extensionPoints.get("PanelRasterFilter");

                        Class<?> c = point.get(filterID).getExtension();

                        Constructor<?> hazNuevo = c.getConstructor();

                        return hazNuevo.newInstance();

                } catch (IllegalArgumentException e) {

                        log.debug("Error loading filter class", e);

                } catch (InstantiationException e) {

                        log.debug("Error loading filter class", e);

                } catch (IllegalAccessException e) {

                        log.debug("Error loading filter class", e);

                } catch (InvocationTargetException e) {

                        log.debug("Error loading filter class", e);

                } catch (SecurityException e) {

                        log.debug("Error loading filter class", e);

                } catch (NoSuchMethodException e) {

                        log.debug("Error loading filter class", e);

                }

                return null;

        }

        public void saveToState(PersistentState state) throws PersistenceException {

                state.set("type", type);

                state.set("id", id);

                if(defaultValue instanceof RegistrableFilterListener) {

                        savePanel(state);

                        state.setNull("defaultValue");

                } else {

                        state.set("defaultValue", GenericPersistentObject.create(defaultValue));

                }

                state.set("list", list);

        }        

        private void savePanel(PersistentState state) throws PersistenceException {

                Params p = ((RegistrableFilterListener)defaultValue).getParams();

                state.set("paramsForUI", p);

                state.set("managerID", managerID);

        }

        public static void registerPersistence() {

                PersistenceManager manager = ToolsLocator.getPersistenceManager();

                DynStruct definition = manager.addDefinition(

                                ParamImpl.class,

                                "ParamImpl_Persistence",

                                "ParamImpl Persistence",

                                null, 

                                null

                );

                definition.addDynFieldInt("type")

                .setMandatory(false);

                definition.addDynFieldString("id")

                .setMandatory(false);

                definition.addDynFieldObject("defaultValue")

                .setClassOfValue(GenericPersistentObject.class)

                .setMandatory(false);

                definition.addDynFieldList("list")

                .setClassOfItems(String.class)

                .setMandatory(false);

                definition.addDynFieldObject("paramsForUI")

                .setClassOfValue(Params.class)

                .setMandatory(false);

                definition.addDynFieldString("managerID")

                .setMandatory(false);

        }

}