How to use

getDistance

method

in

org.opengis.filter.spatial.DWithin

  Object cloneFilter(
      BinarySpatialOperator bso, Object extraData, Expression ex1, Expression ex2) {
    DWithin filter = (DWithin) bso;
    return ff.dwithin(ex1, ex2, filter.getDistance(), filter.getDistanceUnits());
  }
}.transform(filter, extraData);

env.expandBy(filter.getDistance());

  @Override
  public Filter replaceExpressions(
      DWithin filter, Expression expression1, Expression expression2) {
    return ff.dwithin(
        expression1,
        expression2,
        filter.getDistance(),
        filter.getDistanceUnits(),
        filter.getMatchAction());
  }
});

public Object visit(DWithin filter, Object extraData) {
  double distance = filter.getDistance();
  if(filter.getExpression1() instanceof Literal) {
    Literal transformed = bufferTransformGeometry((Literal) filter.getExpression1(), distance, extraData);
    return getFactory(extraData).intersects(transformed, filter.getExpression2());
  } else if(filter.getExpression2() instanceof Literal) {
    Literal transformed = bufferTransformGeometry((Literal) filter.getExpression2(), distance, extraData);
    return getFactory(extraData).intersects(filter.getExpression1(), transformed);
  } else {
    LOGGER.log(Level.WARNING, "Could not transform this filter because " +
        "it does not use a geometry literal: {0}.\n" +
        "The resulting of filtering will be most likely wrong", new Object[] {filter});
    return filter;
  }
}

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;
}

@Override
public Object visit(DWithin filter, Object extraData) {
  double distance = filter.getDistance();
  if(filter.getExpression1() instanceof Literal) {
    Literal transformed = bufferTransformGeometry((Literal) filter.getExpression1(), distance, extraData);
    return getFactory(extraData).intersects(transformed, filter.getExpression2());
  } else if(filter.getExpression2() instanceof Literal) {
    Literal transformed = bufferTransformGeometry((Literal) filter.getExpression2(), distance, extraData);
    return getFactory(extraData).intersects(filter.getExpression1(), transformed);
  } else {
    LOGGER.log(Level.WARNING, "Could not transform this filter because " +
        "it does not use a geometry literal: {0}.\n" +
        "The resulting of filtering will be most likely wrong", new Object[] {filter});
    return filter;
  }
}

public Object visit(DWithin filter, Object arg1) {
  Expression[][] exps = visitBinarySpatialOp(filter);
  List combinedFilters = new ArrayList(exps.length);
  for (int i = 0; i < exps.length; i++) {
    Expression left = exps[i][0];
    Expression right = exps[i][1];
    Filter unrolled =
        ff.dwithin(
            left,
            right,
            filter.getDistance(),
            filter.getDistanceUnits(),
            filter.getMatchAction());
    combinedFilters.add(unrolled);
  }
  Filter unrolled = combineOred(combinedFilters);
  return unrolled;
}

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());
}

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());
}

assertTrue(filter.getDistance() > 0);
Double dist = filter.getDistance();
assertEquals(200.0, dist);

assertTrue(filter.getDistance() > 0);
Double dist = filter.getDistance();
assertEquals(200.0, dist);

  Object cloneFilter(BinarySpatialOperator bso, Object extraData, Expression ex1,
      Expression ex2) {
    DWithin filter = (DWithin) bso;
    return ff.dwithin(ex1, ex2, filter.getDistance(), filter.getDistanceUnits());
  }
}.transform(filter, extraData);

@Override
public Filter[] visit(DWithin filter, Object extraData) {
  return boundedOp(filter,
      (g1, g2) -> ff.dwithin(g1, g2, filter.getDistance(), filter.getDistanceUnits()),
      false);
}

public Object visit(DWithin filter, Object arg1) {
  Expression[][] exps = visitBinarySpatialOp(filter);
  List combinedFilters = new ArrayList(exps.length);
  for (int i = 0; i < exps.length; i++) {
    Expression left = exps[i][0];
    Expression right = exps[i][1];
    Filter unrolled = ff.dwithin(left, right, filter.getDistance(), filter
        .getDistanceUnits(), filter.getMatchAction());
    combinedFilters.add(unrolled);
  }
  Filter unrolled = combineOred(combinedFilters);
  return unrolled;
}

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);
}

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

public Object visit(DWithin filter, Object extraData) {
  Expression geometry1 = visitBinaryChild(filter.getExpression1(), extraData, 0);
  Expression geometry2 = visitBinaryChild(filter.getExpression2(), extraData, 1);
  double distance = filter.getDistance();
  String units = filter.getDistanceUnits();
  return getFactory(extraData)
      .dwithin(geometry1, geometry2, distance, units, filter.getMatchAction());
}