/**
* Extracts special fields and returns their values as an array of strings.
*
* @param entity the entity
* @param preferredLanguage the preferred language
* @return a string array, [0] = name, [1] = ref, [2} = housenumber, [3] layer, [4] elevation, [5]
* relationType
*/
public static SpecialTagExtractionResult extractSpecialFields(
Entity entity, String preferredLanguage) {
boolean foundPreferredLanguageName = false;
String name = null;
String ref = null;
String housenumber = null;
byte layer = 5;
short elevation = 0;
String relationType = null;
if (entity.getTags() != null) {
for (Tag tag : entity.getTags()) {
String key = tag.getKey().toLowerCase(Locale.ENGLISH);
if ("name".equals(key) && !foundPreferredLanguageName) {
name = tag.getValue();
} else if ("piste:name".equals(key) && name == null) {
name = tag.getValue();
} else if ("addr:housenumber".equals(key)) {
housenumber = tag.getValue();
} else if ("ref".equals(key)) {
ref = tag.getValue();
} else if ("layer".equals(key)) {
String l = tag.getValue();
try {
byte testLayer = Byte.parseByte(l);
if (testLayer >= -5 && testLayer <= 5) {
testLayer += 5;
}
layer = testLayer;
} catch (NumberFormatException e) {
LOGGER.finest(
"could not parse layer information to byte type: "
+ tag.getValue()
+ "\t entity-id: "
+ entity.getId()
+ "\tentity-type: "
+ entity.getType().name());
}
} else if ("ele".equals(key)) {
String strElevation = tag.getValue();
strElevation = strElevation.replaceAll("m", "");
strElevation = strElevation.replaceAll(",", ".");
try {
double testElevation = Double.parseDouble(strElevation);
if (testElevation < MAX_ELEVATION) {
elevation = (short) testElevation;
}
} catch (NumberFormatException e) {
LOGGER.finest(
"could not parse elevation information to double type: "
+ tag.getValue()
+ "\t entity-id: "
+ entity.getId()
+ "\tentity-type: "
+ entity.getType().name());
}
} else if ("type".equals(key)) {
relationType = tag.getValue();
} else if (preferredLanguage != null && !foundPreferredLanguageName) {
Matcher matcher = NAME_LANGUAGE_PATTERN.matcher(key);
if (matcher.matches()) {
String language = matcher.group(3);
if (language.equalsIgnoreCase(preferredLanguage)) {
name = tag.getValue();
foundPreferredLanguageName = true;
}
}
}
}
}
return new SpecialTagExtractionResult(name, ref, housenumber, layer, elevation, relationType);
}
