| gvSIG desktop 1

package org.gvsig.fmap.mapcontext.layers;

import java.awt.geom.Point2D;

import java.net.URI;

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

import org.gvsig.tools.persistence.Persistent;

import org.gvsig.tools.persistence.PersistentState;

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

/**

 * This is an abstract class to keep the properties of the HyperLink. One layer may have

 * one or zero LinkProperties. The properties of a Link are:

 * - fieldName, the field?s name of the selected column of the table associated to the

 *         layer

 * - extName, the name of the extension that the usser indicates

 * - typeLink, the type of the Link

 * The class implements  'IPersistance' interface to provide persistance to the properties

 * of HyperLink

 */

public abstract class AbstractLinkProperties implements Persistent {

        private String fieldName;

        private String extName;

        private int typeLink;

        /**

         * Default constructor

         */

        public AbstractLinkProperties(){

                fieldName=null;

                extName=null;

                typeLink=-1;

        }

        /**

         * Provides an array with URIs. Returns one URI by geometry that includes the point

         * in its own geometry limits with a allowed tolerance.

         * @param layer, the layer

         * @param point, the point to check that is contained or not in the geometries in the layer

         * @param tolerance, the tolerance allowed. Allowed margin of error to detect if the  point

         *                 is contained in some geometries of the layer

         * @return

         * @throws ReadException

         * @throws BehaviorException

         */

        public abstract URI[] getLink(FLayer layer, Point2D point, double tolerance) throws ReadException;

        /**

         * Gets the field?s name of the table that the user has selected

         * @return this name of the field

         */

        public String getField(){

                return this.fieldName;

        }

        /**

         * Sets the field?s name

         * @param campo, the field?s name

         */

        public void setField(String campo){

                this.fieldName=campo;

        }

        /**

         * Gets the type of the HyperLink

         * @return the type

         */

        public int getType(){

                return this.typeLink;

        }

        /**

         * Sets the type of the HyperLink

         * @param tipo

         */

        public void setType(int tipo){

                this.typeLink=tipo;

        }

        /**

         * Gets the extension of the files that the user has indicated like properties of the

         * HyperLink, this extension is added to the content of the field selected in the table

         *

         * @return the extension

         */

        public String getExt(){

                return this.extName;

        }

        /**

         * Sets the extension

         * @param extension, the extension of the files

         */

        public void setExt(String extension){

                this.extName=extension;

        }

//        /**

//         * Provides persistance to the properties of the HyperLink.

//         * @return XMLEntity with the information of the HyperLink

//         */

//        public XMLEntity getXMLEntity() {

//                XMLEntity xml=new XMLEntity();

//                xml.putProperty("typeChild","linkProperties");

//                xml.putProperty("extName",extName);

//                xml.putProperty("fieldName",fieldName);

//                xml.putProperty("typeLink",typeLink);

//                return xml;

//        }

//

//        /**

//         * Sets the properties of the HyperLink using a XMLEntity that contains the information

//         * @param XMLEntity

//         */

//        public void setXMLEntity(XMLEntity xml) {

//                extName=xml.getStringProperty("extName");

//                fieldName=xml.getStringProperty("fieldName");

//                typeLink=xml.getIntProperty("typeLink");

//        }

        /**

         * Saves the internal state of the object on the provided

         * PersistentState object.

         * 

         * @param state

         */

        public void saveToState(PersistentState state) throws PersistenceException {

                state.set("extName",extName);

                state.set("fieldName",fieldName);

                state.set("typeLink",typeLink);

        }

        /**

         * Set the state of the object from the state passed as parameter.

         *

         * @param state

         */

        public void loadFromState(PersistentState state) throws PersistenceException {

                extName = state.getString("extName");

                fieldName = state.getString("fieldName");

                typeLink = state.getInt("typeLink");

        }

}