static TypeDescription convertTypeInfo(TypeInfo info) {
switch (info.getCategory()) {
case PRIMITIVE:
{
PrimitiveTypeInfo pinfo = (PrimitiveTypeInfo) info;
switch (pinfo.getPrimitiveCategory()) {
case BOOLEAN:
return TypeDescription.createBoolean();
case BYTE:
return TypeDescription.createByte();
case SHORT:
return TypeDescription.createShort();
case INT:
return TypeDescription.createInt();
case LONG:
return TypeDescription.createLong();
case FLOAT:
return TypeDescription.createFloat();
case DOUBLE:
return TypeDescription.createDouble();
case STRING:
return TypeDescription.createString();
case DATE:
return TypeDescription.createDate();
case TIMESTAMP:
return TypeDescription.createTimestamp();
case BINARY:
return TypeDescription.createBinary();
case DECIMAL:
{
DecimalTypeInfo dinfo = (DecimalTypeInfo) pinfo;
return TypeDescription.createDecimal()
.withScale(dinfo.getScale())
.withPrecision(dinfo.getPrecision());
}
case VARCHAR:
{
BaseCharTypeInfo cinfo = (BaseCharTypeInfo) pinfo;
return TypeDescription.createVarchar().withMaxLength(cinfo.getLength());
}
case CHAR:
{
BaseCharTypeInfo cinfo = (BaseCharTypeInfo) pinfo;
return TypeDescription.createChar().withMaxLength(cinfo.getLength());
}
default:
throw new IllegalArgumentException(
"ORC doesn't handle primitive" + " category " + pinfo.getPrimitiveCategory());
}
}
case LIST:
{
ListTypeInfo linfo = (ListTypeInfo) info;
return TypeDescription.createList(convertTypeInfo(linfo.getListElementTypeInfo()));
}
case MAP:
{
MapTypeInfo minfo = (MapTypeInfo) info;
return TypeDescription.createMap(
convertTypeInfo(minfo.getMapKeyTypeInfo()),
convertTypeInfo(minfo.getMapValueTypeInfo()));
}
case UNION:
{
UnionTypeInfo minfo = (UnionTypeInfo) info;
TypeDescription result = TypeDescription.createUnion();
for (TypeInfo child : minfo.getAllUnionObjectTypeInfos()) {
result.addUnionChild(convertTypeInfo(child));
}
return result;
}
case STRUCT:
{
StructTypeInfo sinfo = (StructTypeInfo) info;
TypeDescription result = TypeDescription.createStruct();
for (String fieldName : sinfo.getAllStructFieldNames()) {
result.addField(fieldName, convertTypeInfo(sinfo.getStructFieldTypeInfo(fieldName)));
}
return result;
}
default:
throw new IllegalArgumentException("ORC doesn't handle " + info.getCategory());
}
}
