Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3 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.

 *

 * For any additional information, do not hesitate to contact us at info AT

 * gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.featureform.swing.impl.dynformfield.selectableforeingkey;

import java.util.Objects;

import org.gvsig.expressionevaluator.Expression;

import org.gvsig.expressionevaluator.ExpressionUtils;

import org.gvsig.expressionevaluator.SymbolTable;

import org.gvsig.featureform.swing.JFeaturesForm.FeaturesFormContext;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.DataManager;

import static org.gvsig.fmap.dal.DataManager.DAL_FOREING_CODE;

import static org.gvsig.fmap.dal.DataManager.DAL_FOREING_LABEL;

import static org.gvsig.fmap.dal.DataManager.DAL_FOREING_TABLE;

import org.gvsig.fmap.dal.expressionevaluator.FeatureSymbolTable;

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

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

import org.gvsig.tools.dynform.DynFormFieldDefinition;

import org.gvsig.tools.dynform.JDynForm;

import org.gvsig.tools.dynform.JDynFormField;

import org.gvsig.tools.dynform.spi.DynFormSPIManager;

import org.gvsig.tools.dynform.spi.dynformfield.AbstractJDynFormFieldWithValueList;

import org.gvsig.tools.dynform.spi.dynformfield.JDynFormFieldFactory;

import org.gvsig.tools.dynobject.DynObjectValueItem;

@SuppressWarnings("UseSpecificCatch")

public class JDynFormFieldSelectableForeingKey extends AbstractJDynFormFieldWithValueList implements JDynFormField {

    public JDynFormFieldSelectableForeingKey(

            DynFormSPIManager serviceManager,

            DynFormSPIManager.ComponentsFactory componentsFactory,

            JDynFormFieldFactory factory,

            DynFormFieldDefinition definition,

            Object value

    ) {

        super(serviceManager, componentsFactory, factory, definition, value);

    }

    @Override

    protected DynObjectValueItem[] getAvailableValues() {

        String foreingLabel = getTagValueAsString(DAL_FOREING_LABEL, null);

        String foreingTableName = getTagValueAsString(DAL_FOREING_TABLE, null);

        String foreingCodeName = getTagValueAsString(DAL_FOREING_CODE, null);

        try {

            DataManager dataManager = DALLocator.getDataManager();

            Expression labelExpression = ExpressionUtils.createExpression(foreingLabel);

            FeatureSymbolTable featureSymbolTable = dataManager.createFeatureSymbolTable();

            SymbolTable symbolTable = featureSymbolTable.createParent();

            FeatureStore store = null;

            JDynForm.DynFormContext context = this.getForm().getContext();

            if( context instanceof FeaturesFormContext ) {

                store = ((FeaturesFormContext) context).getFeatureStore(foreingTableName);

            }

            if( store == null ) {

                LOGGER.warn("Can't locate store '"+foreingTableName+"' to get available values of field '"+this.getName()+"'.");

                return null;

            }

            int count = (int) store.getFeatureCount();

            DynObjectValueItem[] values = new DynObjectValueItem[count];

            int n = 0;

            for (Feature feature : store.getFeatureSet()) {

                featureSymbolTable.setFeature(feature);

                Object code = feature.get(foreingCodeName);

                Object label = labelExpression.execute(symbolTable);

                values[n++] = new DynObjectValueItem(code, Objects.toString(label, Objects.toString(code, "##ERROR##")));

            }

            return values;

        } catch (Exception ex) {

            LOGGER.warn("Can't get values from table '" + foreingTableName + "' for field '" + this.getForm().getDefinition().getName() + ":" + this.getName() + "'.", ex);

        }

        return null;

    }

}