package com.facebook.presto.jdbc.internal.jackson.databind.deser.std;
import com.facebook.presto.jdbc.internal.jackson.core.JsonLocation;
import com.facebook.presto.jdbc.internal.jackson.databind.DeserializationConfig;
import com.facebook.presto.jdbc.internal.jackson.databind.DeserializationContext;
import com.facebook.presto.jdbc.internal.jackson.databind.JavaType;
import com.facebook.presto.jdbc.internal.jackson.databind.PropertyMetadata;
import com.facebook.presto.jdbc.internal.jackson.databind.PropertyName;
import com.facebook.presto.jdbc.internal.jackson.databind.deser.CreatorProperty;
import com.facebook.presto.jdbc.internal.jackson.databind.deser.ValueInstantiator;
/**
* For {@link JsonLocation}, we should be able to just implement
* {@link ValueInstantiator} (not that explicit one would be very
* hard but...)
*/
public class JsonLocationInstantiator extends ValueInstantiator
{
@Override
public String getValueTypeDesc() {
return JsonLocation.class.getName();
}
@Override
public boolean canCreateFromObjectWith() { return true; }
@Override
public CreatorProperty[] getFromObjectArguments(DeserializationConfig config) {
JavaType intType = config.constructType(Integer.TYPE);
JavaType longType = config.constructType(Long.TYPE);
return new CreatorProperty[] {
creatorProp("sourceRef", config.constructType(Object.class), 0),
creatorProp("byteOffset", longType, 1),
creatorProp("charOffset", longType, 2),
creatorProp("lineNr", intType, 3),
creatorProp("columnNr", intType, 4)
};
}
private static CreatorProperty creatorProp(String name, JavaType type, int index) {
return new CreatorProperty(new PropertyName(name), type, null,
null, null, null, index, null, PropertyMetadata.STD_REQUIRED);
}
@Override
public Object createFromObjectWith(DeserializationContext ctxt, Object[] args) {
return new JsonLocation(args[0], _long(args[1]), _long(args[2]),
_int(args[3]), _int(args[4]));
}
private final static long _long(Object o) {
return (o == null) ? 0L : ((Number) o).longValue();
}
private final static int _int(Object o) {
return (o == null) ? 0 : ((Number) o).intValue();
}
}