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.spi;

//import com.google.gson.stream.JsonReader;

//import com.google.gson.stream.JsonToken;

import java.io.StringWriter;

import java.util.Iterator;

import org.gvsig.fmap.dal.DataParameters;

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

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

import org.gvsig.tools.dynobject.DelegatedDynObject;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.dynobject.DynField;

import org.gvsig.tools.dynobject.DynObject;

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

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

import org.gvsig.tools.persistence.PersistentState;

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

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

//import com.google.gson.stream.JsonWriter;

//import java.io.IOException;

//import java.io.StringReader;

/**

 * @author jmvivo

 *

 */

public abstract class AbstractDataParameters implements DataParameters {

        private static final Logger logger = LoggerFactory.getLogger(AbstractDataParameters.class);

        public Object getDynValue(String name) {

                return getDelegatedDynObject().getDynValue(name);

        }

        public String toString() {

                return getDelegatedDynObject().toString();

        }

//        public boolean fromString(String values) {

//            boolean ok = true;

//            try {

//                DynObject obj = getDelegatedDynObject();

//                JsonReader reader = new JsonReader(new StringReader(values));

//                reader.setLenient(true);

//                reader.beginObject();

//                String name = null;

//                String value = null;

//                while (reader.hasNext()) {

//                    name ="unknow";

//                    try {

//                        name = reader.nextName();

//                        if (reader.peek() == JsonToken.NULL) {

//                            value = null;

//                        } else {

//                            value = reader.nextString();

//                        }

//                        obj.setDynValue(name, value);

//                    } catch (Exception ex) {

//                        logger.warn("Can't restore parameter '"+name+"' from string "+values+".", ex);

//                        ok = false;

//                    }

//                }

//                reader.endObject();

//            } catch (IOException ex) {

//                logger.warn("Can't restore parameters from string "+values+".", ex);

//                ok = false;

//            }

//            return ok;

//        }

//

//        public String toString() {

//            try {

//                DynObject obj = getDelegatedDynObject();

//                DynClass dynClass = obj.getDynClass();

//                DynField[] fields = dynClass.getDynFields();

//                StringWriter swriter = new StringWriter();

//                JsonWriter writer = new JsonWriter(swriter);

//                writer.setSerializeNulls(true);

//                writer.setLenient(true);

//                writer.setHtmlSafe(false);

//                writer.setIndent("");

//                writer.beginObject();

//                if (  fields != null && fields.length >0 ) {

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

//                        String fieldname = fields[i].getName();

//                        Object value = obj.getDynValue(fieldname);

//                        writer.name(fieldname);

//                        if( value == null ) {

//                            writer.value((String)null);

//                        } else {

//                            writer.value(value.toString());

//                        }

//                    }

//                }

//                writer.endObject();

//                writer.close();

//                return swriter.toString();

//            } catch (IOException ex) {

//                logger.warn("Can't serializar DataParamerters correctly.",ex);

//                return getDelegatedDynObject().toString();

//            }

//        }

//

        public void setDynValue(String name, Object value) {

                DelegatedDynObject delegated = getDelegatedDynObject();

                if (delegated.getDynClass().getDynField(name)!=null){

                        delegated.setDynValue(name, value);        

                } else {

                    try {

                      throw new IllegalArgumentException(name);

                    } catch(IllegalArgumentException ex) {

                        logger.warn("Attribute '"+name+"' is not defined in "

                                        +delegated.getDynClass().getFullName()+ " definition",ex);

                    }

                }

        }

        public void clear() {

                // TODO Delegar en el DynObject cuando tenga este servicio

                DynField[] fields =

                                getDelegatedDynObject().getDynClass()

                                .getDeclaredDynFields();

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

                        this.setDynValue(fields[i].getName(), fields[i].getDefaultValue());

                }

        }

        protected void copyValuesTo(AbstractDataParameters target) {

                // TODO Delegar en el DynObject cuando tenga este servicio

                DynField[] fields =

                                getDelegatedDynObject().getDynClass()

                                .getDynFields();

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

                        target.setDynValue(fields[i].getName(), this.getDynValue(fields[i]

                                        .getName()));

                }

        }

        public DataParameters getCopy() {

                // TODO Delegar en el DynObject cuando tenga este servicio

                AbstractDataParameters copy;

                try {

                        copy = (AbstractDataParameters) this.getClass().newInstance();

                } catch (InstantiationException e) {

                        throw new CopyParametersException("data parameters", e);

                } catch (IllegalAccessException e) {

                        throw new CopyParametersException("data parameters", e);

                }

                this.copyValuesTo(copy);

                return copy;

        }

        public void saveToState(PersistentState state) throws PersistenceException {

                DynField[] fields =

                                getDelegatedDynObject().getDynClass().getDynFields();

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

                    if (fields[i].isPersistent()) {

                            String name = fields[i].getName(); 

                            Object value = this.getDynValue(fields[i].getName()); 

                                state.set(name,value);

                        }

                }

        }

        public void loadFromState(PersistentState state) throws PersistenceException {

                Iterator it = state.getNames();

                while (it.hasNext()) {

                        String name = (String) it.next();

                        this.setDynValue(name, state.get(name));

                }

        }

        public void delegate(DynObject dynObject) {

                getDelegatedDynObject().delegate(dynObject);

        }

        public DynClass getDynClass() {

                return getDelegatedDynObject().getDynClass();

        }

        public boolean hasDynValue(String name) {

                return getDelegatedDynObject().hasDynValue(name);

        }

        public void implement(DynClass dynClass) {

                getDelegatedDynObject().implement(dynClass);

        }

        public Object invokeDynMethod(String name, DynObject context)

                        throws DynMethodException {

                return getDelegatedDynObject().invokeDynMethod(this, name, context);

        }

        public Object invokeDynMethod(int code, DynObject context)

                        throws DynMethodException {

                return getDelegatedDynObject().invokeDynMethod(this, code, context);

        }

        public void validate() throws ValidateDataParametersException {

            try {

            this.getDynClass().validate(this);

        } catch (DynObjectValidateException e) {

            throw new ValidateDataParametersException(e);

        }

        }

        /**

         * Returns an instance of the {@link DynObject} to delegate to.

         * 

         * @return the delegate {@link DynObject}

         */

        protected abstract DelegatedDynObject getDelegatedDynObject();

}