How to use

getExpression1

method

in

org.opengis.filter.spatial.DWithin

@Override
public Expression getExpression1(DWithin filter) {
  return filter.getExpression1();
}

public Object visit(DWithin filter, Object extraData) {
  checkLeftExpressionIsProperty(filter.getExpression1());
  return FilterToTextUtil.buildDWithin(filter, extraData);
}

public static Object buildDWithin(DWithin filter, Object extraData, ExpressionToText visitor) {
  LOGGER.finer("exporting DWITHIN");
  StringBuilder output = asStringBuilder(extraData);
  output.append("DWITHIN(");
  filter.getExpression1().accept(visitor, output);
  output.append(", ");
  filter.getExpression2().accept(visitor, output);
  output.append(", ");
  output.append(filter.getDistance());
  output.append(", ");
  output.append(filter.getDistanceUnits());
  output.append(")");
  return output;
}

public Object visit(DWithin filter, Object data) {
  filter.getExpression1().accept(this, data);
  if (found) return found;
  filter.getExpression2().accept(this, data);
  return found;
}

@Override
public Object visit(DWithin filter, Object data) {
  data = geom(filter.getExpression1(), data);
  data = geom(filter.getExpression2(), data);
  return data;
}

public Object visit(DWithin filter, Object data) {
  data = filter.getExpression1().accept(this, data);
  data = filter.getExpression2().accept(this, data);
  return data;
}

public Object visit(DWithin filter, Object data) {
  data = filter.getExpression1().accept(this, data);
  if (found(data)) return data;
  data = filter.getExpression2().accept(this, data);
  return data;
}

public Object visit(DWithin filter, Object extraData) {
  Expression left = filter.getExpression1();
  Expression right = filter.getExpression2();
  final String type = "DWithin";
  start(type);
  left.accept(this, extraData);
  right.accept(this, extraData);
  element("Distance", String.valueOf(filter.getDistance()));
  element("DistanceUnits", String.valueOf(filter.getDistanceUnits()));
  end(type);
  return extraData;
}

public Object visit(DWithin filter, Object extraData) {
  Expression geometry1 = visit(filter.getExpression1(), extraData);
  Expression geometry2 = visit(filter.getExpression2(), extraData);
  double distance = filter.getDistance();
  String units = filter.getDistanceUnits();
  return getFactory(extraData)
      .dwithin(geometry1, geometry2, distance, units, filter.getMatchAction());
}

if (filter.getExpression1() instanceof PropertyName
    && filter.getExpression2() instanceof Literal) {
  geometry = (Literal) filter.getExpression2();
    && filter.getExpression1() instanceof Literal) {
  geometry = (Literal) filter.getExpression2();

assertNotNull(filter.getExpression1());
PropertyName propName = (PropertyName) filter.getExpression1();
String name = propName.getPropertyName();
assertEquals("the_geom", name);

assertNotNull(filter.getExpression1());
PropertyName propName = (PropertyName) filter.getExpression1();
String name = propName.getPropertyName();
assertEquals("the_geom", name);

public void testDWithinParse() throws Exception {
  FilterMockData.dwithin(document, document);
  DWithin dwithin = (DWithin) parse();
  assertNotNull(dwithin.getExpression1());
  assertNotNull(dwithin.getExpression2());
  assertEquals(1.0, dwithin.getDistance(), 0.1);
  assertEquals("m", dwithin.getDistanceUnits());
}

public void testDWithinParse() throws Exception {
  FilterMockData.dwithin(document, document);
  DWithin dwithin = (DWithin) parse();
  assertNotNull(dwithin.getExpression1());
  assertNotNull(dwithin.getExpression2());
  assertEquals(1.0, dwithin.getDistance(), 0.1);
  assertEquals("m", dwithin.getDistanceUnits());
}

public Object visit( DWithin filter, Object data ) {
  data = filter.getExpression1().accept(this, data);
  data = filter.getExpression2().accept(this, data);
  return data;
}

public Object visit( DWithin filter, Object data ) {
  filter.getExpression1().accept(this, data);
  if( found ) return found;
  filter.getExpression2().accept(this, data);
  return found;
}

public Object visit( DWithin filter, Object data ) {
  filter.getExpression1().accept(this, data);
  filter.getExpression2().accept(this, data);
  return data;
}

public Object visit( DWithin filter, Object data ) {
  data = filter.getExpression1().accept(this, data);
  if( found(data)) return data;
  data = filter.getExpression2().accept(this, data);
  return data;
}

public Object visit(DWithin filter, Object extraData) {
  Expression left = filter.getExpression1();
  Expression right = filter.getExpression2();
  final String type = "DWithin";
  
  start(type);
  left.accept(this,extraData);
  right.accept(this,extraData);
  element("Distance", String.valueOf(filter.getDistance()) );
  element("DistanceUnits", String.valueOf(filter.getDistanceUnits()) );
  end(type);
  return extraData;
}

public Object visit(DWithin filter, Object extraData) {
  Expression geometry1= visit(filter.getExpression1(), extraData);
  Expression geometry2= visit(filter.getExpression2(), extraData);
  double distance=filter.getDistance();
  String units=filter.getDistanceUnits();
  return getFactory(extraData).dwithin(geometry1, geometry2, distance, units);
}