Hibernate Spatial PostgreSQL/PostGIS Grails Plugin

  • Authors : Daniel Henrique Alves Lima
0 vote
Dependency : 
compile ":hibernate-spatial-postgresql:0.0.4"

Documentation Source

Summary

Installation

grails install-plugin hibernate-spatial-postgresql

Description

Hibernate Spatial Provider for PostgreSQL/PostGIS.

It's a child plugin of hibernate-spatial.

Usage example

Install the plugin

grails install-plugin hibernate-spatial-postgresql

Create a spatially enabled database

Steps 7, 8, 9 and 10 of PostGIS Compile from Source and Install

or

Creating PostGIS spatially-enabled databases from an in-built template

Configure the corresponding JDBC Driver dependency in BuildConfig.groovy

dependencies {
        runtime 'postgresql:postgresql:8.4-702.jdbc4'
    }

Change the JDBC URL in DataSource(s).groovy

url = 'jdbc:postgresql://localhost/test_db'

In your domain classes, define properties of the type com.vividsolutions.jts.geom.Geometry (or subclasses)

// Place.groovy
package test
import com.vividsolutions.jts.geom.Point
class Place {
    String description
    Point location
}

Perform some tests using save, dynamic finders, HQL and Criteria

//import com.vividsolutions.jts.geom.GeometryFactory
//import com.vividsolutions.jts.geom.Coordinate
//import org.hibernatespatial.criterion.SpatialRestrictions
//import com.vividsolutions.jts.io.WKTReader
   Place.withNewTransaction {
            Place p = new Place()
            p.description = 'Desc'
            p.location = geometryFactory.createPoint(new Coordinate(5d, 5d))
            p.save(failOnError: true, flush: true)
   }
   Place.withNewTransaction {
             println(Place.createCriteria()
                     .add(SpatialRestrictions.within("location", reader.read('POLYGON ((0 0, 0 10, 10 10, 10 0, 0 0))')))
                     .list())
             def filter = reader.read('POLYGON ((0 0, 0 10, 10 10, 10 0, 0 0))')
             Query q = Place.createQuery("from Place where within(location, ?) = true")
             q.setParameter(0, filter, GeometryUserType.TYPE)
             println (q.list())
   }

DomainClass.withNewTransaction is available through transaction-handling.