Re: [Geotools-gt2-users] Displaying a FeatureCollection?

[Oliver G. <ol...@dr...>]

Michael,

Thank you for the code snipped.  Last night I figured this out by alsointegrating a snipped from the QuickStart example which matches withyour code snipped.  I passed out before posting on the forum.
I look forward to being an active member on this forum.  Below is my working code and POM.

package org.geotools.demo.example;

import org.geotools.data.DataUtilities;
import org.geotools.feature.FeatureCollection;
import org.geotools.feature.FeatureCollections;
import org.geotools.feature.simple.SimpleFeatureBuilder;

import org.geotools.geometry.jts.JTSFactoryFinder;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.Point;

import org.geotools.feature.FeatureIterator;
import com.vividsolutions.jts.geom.Geometry;
import org.geotools.data.FeatureSource;
import org.geotools.map.DefaultMapContext;
import org.geotools.map.MapContext;
import org.geotools.swing.JMapFrame;

public class DisplayForcedShape {
public static void main(String[] args) throws Exception {
    final SimpleFeatureType TYPE = DataUtilities.createType("Location","location:Point,name:String"); // see createFeatureType();
    FeatureCollection collection = FeatureCollections.newCollection();
        double lon[] = {123.31, 0};
        double lat[] = {48.4, 52};
        String name[] = { "Point1", "Point2", "Point3" };
    GeometryFactory factory = JTSFactoryFinder.getGeometryFactory(null);    
        for(int i=0;i<=1;i++){
            Point point = factory.createPoint( new Coordinate(lon[i],lat[i]));
                        SimpleFeature feature = SimpleFeatureBuilder.build( TYPE, new Object[]{point, name[i]}, null );
                        collection.add( feature );
    }

        FeatureIterator iterator = collection.features();
        try {
            while (iterator.hasNext()) {
                SimpleFeature feature = (SimpleFeature)iterator.next();

                Geometry geometry = (Geometry) feature.getDefaultGeometry();
                Coordinate[] coords = geometry.getCoordinates();
                for( int i = 0; i < coords.length; i++ ) {
                    System.out.println(coords[i]);
                }
            }
        }
        finally {
            if( iterator != null ){
                // YOU MUST CLOSE THE ITERATOR!
                iterator.close();
            }
        }
        
        FeatureSource featureSource = DataUtilities.source(collection);
         MapContext map = new DefaultMapContext();
        map.setTitle("Quickstart");
        map.addLayer(featureSource, null);

        // Now display the map
        JMapFrame.showMap(map);
}
}


<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.geotools.demo.example</groupId>
  <artifactId>gttest1</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
 <name>gttest1</name>
  <url>http://maven.apache.org</url>
    
    <properties>
        <geotools.version>2.6-M3</geotools.version>
      </properties>
<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.0.2</version>
                <configuration>
                    <source>1.5</source>
                    <target>1.5</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-main</artifactId>
            <version>${geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-shapefile</artifactId>
            <version>${geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-epsg-hsql</artifactId>
            <version>${geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-swing</artifactId>
            <version>${geotools.version}</version>
        </dependency>
    </dependencies>
    <repositories>
        <repository>
            <id>maven2-repository.dev.java.net</id>
            <name>Java.net repository</name>
            <url>http://download.java.net/maven/2</url>
        </repository>
        <repository>
            <id>osgeo</id>
            <name>Open Source Geospatial Foundation Repository</name>
            <url>http://download.osgeo.org/webdav/geotools/</url>
        </repository>
        <repository>
          <id>osgeo-snapshots</id>
          <name>Snapshot Repository</name>
          <snapshots>
            <enabled>true</enabled>
          </snapshots>
          <url>http://repo.opengeo.org/</url>
        </repository>

    </repositories>
</project>



Michael Bedward wrote:  
Hi Oliver,

In GeoTools 2.6.0, if you just want to display your in-memory feature
collection you can do something like this...

        FeatureCollection<SimpleFeatureType, SimpleFeature> collection = ...

        MapContext map = new DefaultMapContext();
        map.setTitle("My feature collection");
        map.addLayer(collection, null);
        JMapFrame.showMap(map);

These are the imports:

import org.geotools.feature.FeatureCollection;
import org.geotools.map.DefaultMapContext;
import org.geotools.map.MapContext;
import org.geotools.swing.JMapFrame;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;

If you want to display your points with something other than the very
basic default style you might want to look at the StyleLab example:

http://geotools.org/examples/stylelab.html

Hope that helps.

Michael