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/* 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.symbology.fmap.mapcontext.rendering.legend.impl;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.mapcontext.rendering.legend.IClassifiedVectorLegend;

import org.gvsig.fmap.mapcontext.rendering.legend.events.LegendClearEvent;

import org.gvsig.fmap.mapcontext.rendering.legend.events.SymbolLegendEvent;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.persistence.PersistenceException;

import org.gvsig.tools.persistence.PersistentState;

/**

 * Abstract class that implements the interface for legends composed by

 * classified symbols.It will have two methods that will be executed depending

 * on the action that had been done with the legend (addition of a new symbol or

 * clear the legend).

 * 

 * @author 2008- pepe vidal salvador - jose.vidal.salvador@iver.es

 * @author 2009- <a href="cordinyana@gvsig.org">C?sar Ordi?ana</a> - gvSIG team

 */

public abstract class AbstractClassifiedVectorLegend extends

                AbstractVectorialLegend implements IClassifiedVectorLegend {

        public static final String CLASSIFIED_VECTOR_LEGEND_DYNCLASS_NAME =

                        "ClassifiedVectorLegend";

        private static final String FIELD_FIELD_NAMES = "fieldNames";

        private static final String FIELD_FIELD_TYPES = "fieldTypes";

        private String[] fieldNames;

        private int[] fieldTypes;

        /**

         * Looks for a change in a classified symbol of a legend. To perform it, the

         * Array of LegendListeners is scaned and when the corresponding listener is

         * true, the method is invoked and the change will be done.

         * 

         * @param event

         */

        public void fireClassifiedSymbolChangeEvent(SymbolLegendEvent event) {

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

                        getListeners()[i].symbolChanged(event);

                }

        }

        /**

         * Looks for a change in a legend of classified symbols. In this case if the

         * specific legend is cleared.

         * 

         * @param event

         */

        public void fireLegendClearEvent(LegendClearEvent event) {

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

                        getListeners()[i].legendCleared(event);

                }

        }

        public String[] getClassifyingFieldNames() {

                return fieldNames;

        }

        public void setClassifyingFieldNames(String[] fieldNames) {

                this.fieldNames = fieldNames;

        }

        public int[] getClassifyingFieldTypes() {

                return fieldTypes;

        }

        public void setClassifyingFieldTypes(int[] fieldTypes) {

                this.fieldTypes = fieldTypes;

        }

        public boolean isSuitableForShapeType(int shapeType) {

                return getShapeType() == shapeType;

        }

        protected String[] getRequiredFeatureAttributeNames(

                        FeatureStore featureStore) throws DataException {

                String[] requiredFieldNames = null;

                String[] classified = getClassifyingFieldNames();

                requiredFieldNames = new String[classified.length + 1];

                requiredFieldNames[0] =

                                featureStore.getDefaultFeatureType()

                                                .getDefaultGeometryAttributeName();

                for (int i = 1; i < requiredFieldNames.length; i++) {

                        requiredFieldNames[i] = classified[i - 1];

                }

                return requiredFieldNames;

        }

        public Object clone() throws CloneNotSupportedException {

                AbstractClassifiedVectorLegend clone =

                                (AbstractClassifiedVectorLegend) super.clone();

                // Clone fieldNames

                clone.fieldNames = new String[fieldNames.length];

                System.arraycopy(fieldNames, 0, clone.fieldNames, 0, fieldNames.length);

                // Clone fieldTypes

                clone.fieldTypes = new int[fieldTypes.length];

                System.arraycopy(fieldTypes, 0, clone.fieldTypes, 0, fieldTypes.length);

                return clone;

        }

        public void loadFromState(PersistentState state)

                        throws PersistenceException {

                // Set parent properties

                super.loadFromState(state);

                // Set own properties

                setClassifyingFieldNames((String[]) state.getArray(FIELD_FIELD_NAMES,

                                String.class));

                setClassifyingFieldTypes(state.getIntArray(FIELD_FIELD_TYPES));

        }

        public void saveToState(PersistentState state) throws PersistenceException {

                // Save parent properties

                super.saveToState(state);

                // Save own properties

                state.set(FIELD_FIELD_NAMES, getClassifyingFieldNames());

                state.set(FIELD_FIELD_TYPES, getClassifyingFieldTypes());

        }

        public static void registerPersistence() {

                // Add the DynClass definition.

                DynClass dynClass =

                                ToolsLocator.getDynObjectManager().add(

                                                CLASSIFIED_VECTOR_LEGEND_DYNCLASS_NAME);

                // Extend the Vector Legend base definition

                dynClass.extend(VECTORIAL_LEGEND_DYNCLASS_NAME);

                // Field names

                dynClass.addDynFieldList(FIELD_FIELD_NAMES);

                // Field types

                dynClass.addDynFieldList(FIELD_FIELD_TYPES);

        }

}