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.spi;

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

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

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

import org.gvsig.fmap.geom.DataTypes;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.primitive.Envelope;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dataTypes.CoercionException;

/**

 * Default implementation for {@link FeatureProvider}

 *

 */

public class DefaultFeatureProvider implements FeatureProvider {

        protected FeatureType featureType;

        protected boolean[] nulls;

        protected Object[] values;

        protected Geometry defaultGeometry;

        protected Envelope envelope;

        private Object oid;

        private boolean isNew=false;

        public DefaultFeatureProvider(FeatureType type) {

                if (type instanceof EditableFeatureType) {

                        throw new IllegalArgumentException("type can't by editable.");

                }

                this.featureType = type;

                this.values = new Object[featureType.size()];

                this.nulls = new boolean[featureType.size()];

                this.envelope = null;

                this.defaultGeometry = null;

                this.oid = null;

        }

        public DefaultFeatureProvider(FeatureType type, Object oid) {

                this(type);

                this.oid = oid;

        }

        public boolean isReadOnly(int i) {

            FeatureAttributeDescriptor attribute = featureType.getAttributeDescriptor(i);

            if (attribute.getEvaluator() != null) {

                    return true;

            }

            return false;

        }

        /*

         * (non-Javadoc)

         *

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#set(int,

         * java.lang.Object)

         */

        public void set(int i, Object value) {

        FeatureAttributeDescriptor attribute = featureType.getAttributeDescriptor(i);

        if( this.isReadOnly(i) ) {

                        return;

                }

                if (featureType.getDefaultGeometryAttributeIndex() == i) {

            if( value instanceof Geometry ) {

                defaultGeometry = (Geometry) value;

            } else {

                try {

                    defaultGeometry = (Geometry) ToolsLocator.getDataTypesManager().coerce(DataTypes.GEOMETRY, value);

                } catch (CoercionException ex) {

                }

            }

            envelope = null;

                }

                if (value == null) {

                        nulls[i] = true;

                        values[i] = attribute.getDefaultValue();

                } else {

                        values[i] = value;

                        nulls[i] = false;

                }

        }

        /*

         * (non-Javadoc)

         *

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#set(java.lang.String,

         * java.lang.Object)

         */

        public void set(String name, Object value) {

                set(featureType.getIndex(name), value);

        }

        /*

         * (non-Javadoc)

         *

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#get(int)

         */

        public Object get(int i) {

                return values[i];

        }

        /*

         * (non-Javadoc)

         *

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#get(java.lang.String)

         */

        public Object get(String name) {

                FeatureAttributeDescriptor featureAttributeDescriptor = featureType.getAttributeDescriptor(name);        

                return values[featureAttributeDescriptor.getIndex()];

        }

        /*

         * (non-Javadoc)

         *

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#getType()

         */

        public FeatureType getType() {

                return featureType;

        }

        /*

         * (non-Javadoc)

         *

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#getCopy()

         */

        public FeatureProvider getCopy() {

                DefaultFeatureProvider data = new DefaultFeatureProvider(

                                this.getType());

                return getCopy(data);

        }

        /**

         * Copy values from current instance to <code>data</code>

         */

        protected FeatureProvider getCopy(DefaultFeatureProvider data) {

                data.oid = this.oid;

                System.arraycopy(this.values, 0, data.values, 0, this.values.length);

                data.defaultGeometry = this.defaultGeometry;

                data.envelope = this.envelope;

                data.isNew=this.isNew;

                return data;

        }

        /*

         * (non-Javadoc)

         * 

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#getDefaultEnvelope()

         */

        public Envelope getDefaultEnvelope() {

                if (envelope == null && getDefaultGeometry() != null) {

                        envelope = getDefaultGeometry().getEnvelope();

                }

                return envelope;

        }

        /*

         * (non-Javadoc)

         * 

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#getDefaultGeometry()

         */

        public Geometry getDefaultGeometry() {

            return this.defaultGeometry;

        }

        /*

         * (non-Javadoc)

         * 

         * @see

         * org.gvsig.fmap.dal.feature.spi.FeatureProvider#setDefaultEnvelope(org

         * .gvsig.fmap.geom.primitive.Envelope)

         */

        public void setDefaultEnvelope(Envelope envelope) {

                this.envelope = envelope;

        }

        /*

         * (non-Javadoc)

         * 

         * @see

         * org.gvsig.fmap.dal.feature.spi.FeatureProvider#setDefaultGeometry(org

         * .gvsig.fmap.geom.Geometry)

         */

        public void setDefaultGeometry(Geometry geom) {

                int i = featureType.getDefaultGeometryAttributeIndex();

                this.set(i, geom);

        }

        /*

         * (non-Javadoc)

         * 

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#isNull(int)

         */

        public boolean isNull(int i) {

                return nulls[i];

        }

        /*

         * (non-Javadoc)

         * 

         * @see

         * org.gvsig.fmap.dal.feature.spi.FeatureProvider#isNull(java.lang.String)

         */

        public boolean isNull(String name) {

                int i = featureType.getIndex(name);

                return isNull(i);

        }

        /*

         * (non-Javadoc)

         * 

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#getOID()

         */

        public Object getOID() {

                return this.oid;

        }

        /*

         * (non-Javadoc)

         * 

         * @see

         * org.gvsig.fmap.dal.feature.spi.FeatureProvider#setOID(java.lang.Object)

         */

        public void setOID(Object oid) {

                this.oid = oid;

        }

        /*

         * (non-Javadoc)

         * 

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#isNew()

         */

        public boolean isNew(){

                return isNew;

        }

        /*

         * (non-Javadoc)

         * 

         * @see org.gvsig.fmap.dal.feature.spi.FeatureProvider#setNew(boolean)

         */

        public void setNew(boolean isNew){

                this.isNew=isNew;

        }

}