Osgb.java example

Explorer
baleen-master
//Dstl (c) Crown Copyright 2017
package uk.gov.dstl.baleen.annotators.regex;

import java.util.Collections;
import java.util.regex.Matcher;

import org.apache.uima.jcas.JCas;

import com.google.common.collect.ImmutableSet;

import uk.gov.dstl.baleen.annotators.regex.helpers.AbstractRegexAnnotator;
import uk.gov.dstl.baleen.core.pipelines.orderers.AnalysisEngineAction;
import uk.gov.dstl.baleen.types.geo.Coordinate;
import uk.gov.dstl.common.geo.osgb.Constants;
import uk.gov.dstl.common.geo.osgb.EastingNorthingConversion;
import uk.gov.dstl.common.geo.osgb.NationalGrid;
import uk.gov.dstl.common.geo.osgb.OSGB36;
/**
 * Annotate Ordnance Survey coordinates
 * 
 * <p>This annotator will match 6, 8 or 10 figure OS coordinates within the document using a regular expression. LatLon accurate to better than 1.11km.</p>
 * 
 * 
 */
public class Osgb extends AbstractRegexAnnotator<Coordinate>{
	private static final String OSGB_REGEX = "\\b([HJNOST][A-HJ-Z])( )?([0-9]{6}|[0-9]{3} [0-9]{3}|[0-9]{8}|[0-9]{4} [0-9]{4}|[0-9]{10}|[0-9]{5} [0-9]{5})\\b";

	/** New instance.
	 * 
	 */
	public Osgb() {
		super(OSGB_REGEX, false, 1.0);
	}
	
	@Override
	protected Coordinate create(JCas jCas, Matcher matcher) {
		Coordinate loc = new Coordinate(jCas);
		loc.setSubType("osgb");
		try {
			// Attempt to conver to a lat lon
			double[] en = NationalGrid.fromNationalGrid(matcher.group());
			double[] latlonOSGB38 = EastingNorthingConversion.toLatLon(en, Constants.ELLIPSOID_AIRY1830_MAJORAXIS, Constants.ELLIPSOID_AIRY1830_MINORAXIS, Constants.NATIONALGRID_N0, Constants.NATIONALGRID_E0, Constants.NATIONALGRID_F0, Constants.NATIONALGRID_LAT0, Constants.NATIONALGRID_LON0);
			double[] latlonWGS84 = OSGB36.toWGS84(latlonOSGB38[0], latlonOSGB38[1]);
			loc.setGeoJson(String.format("{\"type\": \"Point\", \"coordinates\": [%f,%f]}", latlonWGS84[1], latlonWGS84[0]));
		} catch(Exception e) {
			// Made this debug as it's a common occurance and not serious error, eg to 120911 (as in the date)
			getMonitor().debug("Unable to convert OSGB {}", matcher.group(), e);
		}
		return loc;
		
	}
	
	@Override
	public AnalysisEngineAction getAction() {
		return new AnalysisEngineAction(Collections.emptySet(), ImmutableSet.of(Coordinate.class));
	}
}