Application: gvSIG desktop

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

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

 *

 * @author gvSIG team

        AbstractVectorialLegend implements IClassifiedVectorLegend {

    public static final String CLASSIFIED_VECTOR_LEGEND_PERSISTENCE_DEFINITION_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 (LegendContentsChangedListener listener : getListeners()) {

            listener.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 (LegendContentsChangedListener listener : getListeners()) {

            listener.legendCleared(event);

        }

    }

    @Override

    public String[] getClassifyingFieldNames() {

        return fieldNames;

    }

    @Override

    public void setClassifyingFieldNames(String[] fieldNames) {

        this.fieldNames = fieldNames;

    }

    @Override

    public int[] getClassifyingFieldTypes() {

        return fieldTypes;

    }

    @Override

    public void setClassifyingFieldTypes(int[] fieldTypes) {

        this.fieldTypes = fieldTypes;

    }

    @Override

    public boolean isSuitableForShapeType(int shapeType) {

        return getShapeType() == shapeType;

    }

    @Override

    protected String[] getRequiredFeatureAttributeNames(FeatureStore featureStore) 

            throws DataException 

        {

        List<String> requiredFieldNames = new ArrayList<>();

        requiredFieldNames.add(featureStore.getDefaultFeatureType().getDefaultGeometryAttributeName());

        requiredFieldNames.addAll(Arrays.asList(getClassifyingFieldNames()));

        return requiredFieldNames.toArray(new String[requiredFieldNames.size()]);

    }

    @Override

    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;

    }

    @Override

    public void loadFromState(PersistentState state)

            throws PersistenceException {

        // Set parent properties

        super.loadFromState(state);

        // Set own properties

        this.fieldNames = state.getStringArray(FIELD_FIELD_NAMES);

        this.fieldTypes = state.getIntArray(FIELD_FIELD_TYPES);

    }

    @Override

    public void saveToState(PersistentState state) throws PersistenceException {

        // Save parent properties

        super.saveToState(state);

        // Save own properties

        state.set(FIELD_FIELD_NAMES, this.fieldNames);

        state.set(FIELD_FIELD_TYPES, this.fieldTypes);

    }

    public static class RegisterPersistence implements Callable {

        @Override

        public Object call() throws Exception {

            PersistenceManager manager = ToolsLocator.getPersistenceManager();

            if (manager.getDefinition(CLASSIFIED_VECTOR_LEGEND_PERSISTENCE_DEFINITION_NAME) == null) {

                DynStruct definition = manager.addDefinition(

                        AbstractClassifiedVectorLegend.class,

                        CLASSIFIED_VECTOR_LEGEND_PERSISTENCE_DEFINITION_NAME,

                        CLASSIFIED_VECTOR_LEGEND_PERSISTENCE_DEFINITION_NAME + " Persistence definition",

                        null,

                        null

                );

                // Extend the Vectorial Legend base definition

                definition.extend(manager.getDefinition(VECTORIAL_LEGEND_PERSISTENCE_DEFINITION_NAME));

                // Field names

                definition.addDynFieldArray(FIELD_FIELD_NAMES)

                        .setClassOfItems(String.class);

                // Field types

                definition.addDynFieldArray(FIELD_FIELD_TYPES)

                        .setClassOfItems(int.class);

            }

            return true;

        }

    }

}