analytics/informix/extend/spatial.8.22.FC2/examples/java/CoordRefCreate.java

/*
 * Title:       CoordRefCreate.java 1.00 2002/05/14
 *
 *      Licensed Materials - Property of IBM and/or HCL
 *      IBM Informix  Spatial DataBlade
 *      (c) Copyright IBM Corporation 2002 All rights reserved.
 *      (c) Copyright HCL Technologies Ltd. 2017.  All Rights Reserved.
 *
 *      US Government Users Restricted Rights - Use, duplication or
 *      disclosure restricted by GSA ADP Schedule Contract with
 *      IBM Corp.
 */
import java.sql.*;
import java.util.*;
import com.ibm.spatial.geom.*;
import com.ibm.spatial.srs.*;
import com.ibm.spatial.*;

public class CoordRefCreate {

	static String url = null;
	Connection conn = null;
	CoordRefManager crm = null;

	public CoordRefCreate() throws ClassNotFoundException {
   		// Loading JDBC driver
		System.out.print("Loading JDBC driver...");
		Class.forName("com.informix.jdbc.IfxDriver");
		System.out.println("ok");
	}

	public static void main(String[] args) {
		try {
			CoordRefCreate app = new CoordRefCreate();
			app.init(args);
			app.doRun();
			app.cleanup();
		} catch (Exception e) {
			System.out.println("ERROR: " + e.getMessage() + "\n");
			e.printStackTrace();
		}
    }

    void doRun() throws SpatialException, ClassNotFoundException {

		/**
		 * Set up a CoordRefManager database connection. This connection
		 * will be used to retrieve spatial reference data associated
		 * with the geometries we're going to read.
		 */
		crm = CoordRefManager.getInstance();
		crm.setConnection(conn);

		/**
		 * Search the database for a coordinate reference with
		 * the authoritative name/id: "EPSG:4326"
		 */
		System.out.println("Search database for all the spatial references " +
							"identified by 'EPSG:4326'");
		CoordRef epsg4326 = null;
		for (Enumeration e = crm.findByAuth("EPSG", new Integer(4326));
			 e.hasMoreElements(); ) {
			epsg4326 = (CoordRef) e.nextElement();
			System.out.println(epsg4326);
		}

		/**
		 * Note that we should not use epsg4326 and associate it to a
		 * geometry object, as this is not stored in the CoordRefManager
		 * "in-use" cache.  Instead, we should use the object returned by
		 * the get() method.
		 */
		CoordRef cr4326 = (epsg4326 != null) ? crm.get(epsg4326.getSrid()) : null;

		/**
		 * This object is read-only: calling any of the set methods will
		 * result in an exception.
		 */
		if (cr4326 != null) {
			try {
				cr4326.setAuthName("Dummy");
			} catch (UnsupportedOperationException e) {
				System.out.println("Can't modify this coordinate reference");
			}
		}

		// Search for all the coordinate reference objects in the database
		System.out.println("\nGetting all the CoordRefs in the database ...");
		for (Enumeration allCrs = crm.find(new CoordRef(), 0);
			allCrs.hasMoreElements() ;) {

			CoordRef cr = (CoordRef) allCrs.nextElement();
			System.out.println("Srid = " + cr.getSrid() +
				"  Description = " +	cr.getDescription() +
				"\nSrtext = " + cr.getSrtext() + "\n");
		}

		/**
		 * In order to create and store a new coordinate reference, we first
		 * construct a new CoordRef object.  This object is only a placeholder
		 * for all the data that needs to be passed to the coordinate
		 * reference manager.  Do not associate it with geometry objects.
		 */
		System.out.println("Creating a new CoordRef object ...");
		CoordRef cr = new CoordRef();
		cr.setXY(-100, -100, 100);
		cr.setAuthName("TEST");
		cr.setAuthSrid(new Integer(100));
		cr.setDescription("Spatial Java API Sample");
		cr.setSrtext("UNKNOWN");

		System.out.println("Source CoordRef:");
		System.out.println("Srid=" + cr.getSrid() +
			"  Description= " +	cr.getDescription() +
			"\nProjection= " + cr.getSrtext() + "\n");

		/**
		 * We put the coordinate reference into the CoordRefManager object,
		 * which will serialize it to the database.
		 * The object returned is an immutable coordinate reference, which
		 * may be associated with geometry objects (it is already stored in
		 * the cache).
		 */
		System.out.println("Storing the new CoordRef ...");
		CoordRef crNew = crm.put(cr);
		System.out.println("The srid of the new object is: " + crNew.getSrid());

		/**
		 * The object returned by the previous operation is immutable:
		 * calling any of the set methods will result in an exception.
		 */
		try {
			crNew.setAuthName("Dummy");
		} catch (UnsupportedOperationException e) {
			System.out.println("Can't modify the returned coordinate reference");
		}

		/**
		 * Remove the coordinate reference from the cache and database.
		 */
		System.out.println("Deleting the coordinate reference with srid = " +
							crNew.getSrid());
		crm.remove(crNew.getSrid());
	}

    void init(String args[]) throws SQLException, SpatialException {
		if (args.length == 0) {
			if (url == null || url.length() == 0) {
				System.out.println("ERROR: connection URL must be provided in " +
									"order to run this sample program!");
				return;
			}
		} else {
			url = args[0];
		}

		// Getting connection
        System.out.print("Getting connection...");
        conn = DriverManager.getConnection(url);
        System.out.println("Ok\n");
	}

    void cleanup() throws SQLException {

		crm.setConnection(null);

		// Closing connection
		System.out.print("Closing connection...");
		conn.close();
		System.out.println("ok");
	}
}