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package org.geojson.jackson;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.geojson.LngLatAlt;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.JsonToken;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
public class LngLatAltDeserializer extends JsonDeserializer<LngLatAlt> {
@Override
public LngLatAlt deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException,
JsonProcessingException {
if (jp.isExpectedStartArrayToken()) {
return deserializeArray(jp, ctxt);
}
throw ctxt.mappingException(LngLatAlt.class);
}
protected LngLatAlt deserializeArray(JsonParser jp, DeserializationContext ctxt) throws IOException,
JsonProcessingException {
LngLatAlt node = new LngLatAlt();
node.setLongitude(extractDouble(jp, ctxt, false));
node.setLatitude(extractDouble(jp, ctxt, false));
node.setAltitude(extractDouble(jp, ctxt, true));
List<Double> additionalElementsList = new ArrayList<Double>();
while (jp.hasCurrentToken() && jp.getCurrentToken() != JsonToken.END_ARRAY) {
double element = extractDouble(jp, ctxt, true);
if (!Double.isNaN(element)) {
additionalElementsList.add(element);
}
}
double[] additionalElements = new double[additionalElementsList.size()];
for(int i = 0; i < additionalElements.length; i++) {
additionalElements[i] = additionalElementsList.get(i);
}
node.setAdditionalElements(additionalElements);
return node;
}
private double extractDouble(JsonParser jp, DeserializationContext ctxt, boolean optional)
throws JsonParseException, IOException {
JsonToken token = jp.nextToken();
if (token == null) {
if (optional)
return Double.NaN;
else
throw ctxt.mappingException("Unexpected end-of-input when binding data into LngLatAlt");
}
else {
switch (token) {
case END_ARRAY:
if (optional)
return Double.NaN;
else
throw ctxt.mappingException("Unexpected end-of-input when binding data into LngLatAlt");
case VALUE_NUMBER_FLOAT:
return jp.getDoubleValue();
case VALUE_NUMBER_INT:
return jp.getLongValue();
case VALUE_STRING:
return jp.getValueAsDouble();
default:
throw ctxt.mappingException("Unexpected token (" + token.name()
+ ") when binding data into LngLatAlt");
}
}
}
}
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