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.fmap.dal.feature.impl;

import java.util.ArrayList;

import java.util.Iterator;

import javax.json.JsonArray;

import javax.json.JsonObject;

import javax.json.JsonValue;

import org.gvsig.expressionevaluator.Expression;

import org.gvsig.expressionevaluator.impl.DefaultFeatureRuleExpression;

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

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

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

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

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

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

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

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

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

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

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

import org.gvsig.json.Json;

import org.gvsig.json.JsonArrayBuilder;

import org.gvsig.json.JsonManager;

import org.gvsig.json.JsonObjectBuilder;

import org.gvsig.json.SupportJson;

import org.gvsig.json.SupportToJson;

import org.gvsig.tools.dynobject.exception.DynFieldValidateException;

import org.gvsig.tools.persistence.PersistentState;

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

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class DefaultFeatureRules extends ArrayList<FeatureRule> implements FeatureRules, SupportJson {

    private final static Logger LOGGER = LoggerFactory.getLogger(DefaultFeatureRules.class);

    /**

     *

     */

    private static final long serialVersionUID = -8084546505498274121L;

    @Override

    public boolean add(FeatureRule rule) {

        return super.add(rule);

    }

    @Override

    public boolean add(String name, String description, boolean checkAtUpdate, boolean checkAtFinishEdition, Expression expression) {

        FeatureRule rule = new DefaultFeatureRuleExpression(name, description, checkAtUpdate, checkAtFinishEdition, expression);

        return this.add(rule);

    }

    @Override

    public FeatureRule getRule(int index) {

        return (FeatureRule) super.get(index);

    }

    @Override

    public boolean remove(FeatureRule rule) {

        return super.remove(rule);

    }

    @Override

    public FeatureRules getCopy() {

        DefaultFeatureRules copy = new DefaultFeatureRules();

        copy.addAll(this);

        return copy;

    }

    public void validate(Feature feature, int mode) throws DataException {

        if (feature == null) {

            return;

        }

        if (feature instanceof EditableFeature) {

            this.validate((EditableFeature) feature, mode);

            return;

        }

        this.validate(feature.getEditable(), mode);

    }

    public void validate(EditableFeature feature, int check) throws DataException {

        if (feature == null) {

            return;

        }

        if ((check & CHECK_REQUIREDS) == CHECK_REQUIREDS) {

            checkRequireds(feature);

        }

        if ((check & CHECK_BASIC) == CHECK_BASIC) {

            checkBasics(feature);

        }

        if ((check & CHECK_RULES_AT_FINISH) == CHECK_RULES_AT_FINISH) {

            FeatureStore store = ((DefaultFeature) feature).getStore();

            for (FeatureRule rule : this) {

                if (rule.checkAtFinishEditing()) {

                    rule.validate(feature, store);

                }

            }

        }

        if ((check & CHECK_RULES_AT_EDITING) == CHECK_RULES_AT_EDITING) {

            FeatureStore store = ((DefaultFeature) feature).getStore();

            for (FeatureRule rule : this) {

                if (rule.checkAtUpdate()) {

                    rule.validate(feature, store);

                }

            }

        }

    }

    private void checkRequireds(Feature feature) {

        for (FeatureAttributeDescriptor attr : feature.getType()) {

            if (attr.isAutomatic()) {

                continue;

            }

            if (attr.isPrimaryKey() || !attr.allowNull()) {

                if (feature.get(attr.getIndex()) == null) {

                    String featstr = "unknown";

                    String storename = "unknown";

                    try {

                        featstr = feature.toJsonBuilder().toString();

                    } catch (Throwable th) {

                        LOGGER.debug("Can't convert feature to string", th);

                    }

                    try {

                        storename = feature.getStore().getName();

                    } catch (Throwable th) {

                        LOGGER.debug("Can't convert feature to string", th);

                    }

                    throw new IllegalStateException(

                            String.format(

                                    "The field '%s' in store '%s' can't have null values (%s).",

                                    attr.getName(),

                                    storename,

                                    featstr

                            )

                    );

                }

            }

        }

    }

    private void checkBasics(Feature feature) {

        for (FeatureAttributeDescriptor attr : feature.getType()) {

            try {

                attr.validate(feature.get(attr.getName()));

            } catch (DynFieldValidateException ex) {

                String featstr = "unknown";

                try {

                    featstr = feature.toJsonBuilder().toString();

                } catch (Throwable th) {

                    LOGGER.debug("Can't convert feature to string", th);

                }

                String storename = "unknown";

                try {

                    storename = feature.getStore().getName();

                } catch (Throwable th) {

                    LOGGER.debug("Can't convert feature to string", th);

                }

                throw new IllegalStateException(

                        String.format(

                                "The field '%s' in store '%s' can't have a invalid value. %s. (%s).",

                                attr.getName(),

                                storename,

                                ex.getMessage(),

                                featstr

                        )

                );

            }

        }

    }

    @Override

    public void saveToState(PersistentState state) throws PersistenceException {

        state.set("rules", this.iterator());

    }

    @Override

    public void loadFromState(PersistentState state) throws PersistenceException {

        this.clear();

        Iterator<FeatureRule> it = state.getIterator("rules");

        while (it.hasNext()) {

            FeatureRule rule = it.next();

            this.add(rule);

        }

    }

    @Override

    public void fromJson(JsonObject json) {

        JsonArray items = json.getJsonArray("items");

        if( items!=null ) {

            for (JsonValue item : items) {

                FeatureRule rule = (FeatureRule) Json.toObject(item);

                this.add(rule);

            }

        }

    }

    @Override

    public JsonObject toJson() {

        return this.toJsonBuilder().build();

    }

    @Override

    public JsonObjectBuilder toJsonBuilder() {

        JsonArrayBuilder arraybuilder = Json.createArrayBuilder();

        for (FeatureRule rule : this) {

            if( rule instanceof SupportJson ) {

                arraybuilder.add(((SupportJson)rule).toJsonBuilder());

            }

        }

        JsonObjectBuilder builder = Json.createObjectBuilder();

        builder.add_class(this);

        builder.add("items", arraybuilder);

        return builder;

    }

    public static void selfRegister() {

        Json.registerSerializer(DefaultFeatureRules.class);

    }

}