PropertyExamples.java

package org.geotools.property;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.FeatureReader;
import org.geotools.data.Query;
import org.geotools.data.Transaction;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;

public class PropertyExamples {

    static File directory;
    
    public static void main(String[] args) {
        File tmp = null;
        try {
            tmp = File.createTempFile("example", "");
            boolean exists = tmp.exists();
            if (exists) {
                System.err.println("Removing tempfile " + tmp);
                tmp.delete();
            }
            boolean created = tmp.mkdirs();
            if (!created) {
                System.err.println("Could not create " + tmp);
                System.exit(1);
            }
            File example = new File(tmp, "example.properties");

            BufferedWriter writer = new BufferedWriter(new FileWriter(example));            
            writer.write("_=id:Integer,name:String,geom:Point");
            writer.newLine();
            writer.write("fid1=1|jody garnett|POINT(0 0)");
            writer.newLine();
            writer.write("fid2=2|brent|POINT(10 10)");
            writer.newLine();
            writer.write("fid3=3|dave|POINT(20 20)");
            writer.newLine();
            writer.write("fid4=4|justin deolivera|POINT(30 30)");
            writer.newLine();
            writer.close();

            directory = tmp;
            try {
                example3();
            } catch (Throwable t) {
                t.printStackTrace();
                System.exit(1);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            File list[] = tmp.listFiles();
            for (int i = 0; i < list.length; i++) {
                list[i].delete();
            }
            tmp.delete();
        }
    }
    
    private static void example3() throws IOException {
        System.out.println("example3 start\n");
        // example3 start
        Map<String, Serializable> params = new HashMap<>();
        params.put("directory", directory);
        DataStore datastore = DataStoreFinder.getDataStore(params);

        Query query = new Query("example");
        FeatureReader<SimpleFeatureType, SimpleFeature> reader = datastore.getFeatureReader(query,
                Transaction.AUTO_COMMIT);
        try {
            int count = 0;
            while (reader.hasNext()) {
                SimpleFeature feature = reader.next();
                System.out.println("feature " + count + ": " + feature.getID());
                count++;
            }
            System.out.println("read in " + count + " features");
        } finally {
            reader.close();
        }
        // example3 end
        System.out.println("\nexample3 end\n");
    }

}