@SuppressWarnings("unchecked")
public <K, V> Map<K, V> getMap(int i, Class<K> keysClass, Class<V> valuesClass) {
DataType type = metadata.getType(i);
if (type.getName() != DataType.Name.MAP)
throw new InvalidTypeException(
String.format("Column %s is not of map type", metadata.getName(i)));
Class<?> expectedKeysClass = type.getTypeArguments().get(0).getName().javaType;
Class<?> expectedValuesClass = type.getTypeArguments().get(1).getName().javaType;
if (!keysClass.isAssignableFrom(expectedKeysClass)
|| !valuesClass.isAssignableFrom(expectedValuesClass))
throw new InvalidTypeException(
String.format(
"Column %s is a map of %s->%s (CQL type %s), cannot be retrieve as a map of %s->%s",
metadata.getName(i),
expectedKeysClass,
expectedValuesClass,
type,
keysClass,
valuesClass));
ByteBuffer value = data.get(i);
if (value == null) return Collections.<K, V>emptyMap();
return Collections.unmodifiableMap(Codec.<Map<K, V>>getCodec(type).compose(value));
}
/** Test simple statement selects for all collection data types */
@SuppressWarnings("unchecked")
public void collectionSelectTest() throws Throwable {
HashMap<DataType, Object> sampleValueMap;
String execute_string;
DataType typeArgument1;
DataType typeArgument2;
Row row;
for (DataType dataType : COLLECTION_SELECT_STATEMENTS.keySet()) {
execute_string = COLLECTION_SELECT_STATEMENTS.get(dataType);
row = session.execute(execute_string).one();
sampleValueMap = (HashMap<DataType, Object>) SAMPLE_COLLECTIONS.get(dataType);
typeArgument1 = dataType.getTypeArguments().get(0);
if (dataType.getName() == DataType.Name.MAP) {
typeArgument2 = dataType.getTypeArguments().get(1);
// Create a copy of the map that is being expected
HashMap<DataType, Object> sampleMap =
(HashMap<DataType, Object>) sampleValueMap.get(typeArgument1);
Object mapKey = SAMPLE_DATA.get(sampleMap.keySet().iterator().next());
Object mapValue = sampleMap.values().iterator().next();
HashMap<Object, Object> expectedMap = new HashMap<Object, Object>();
expectedMap.put(mapKey, mapValue);
assertEquals(TestUtils.getValue(row, "k", typeArgument2), SAMPLE_DATA.get(typeArgument2));
assertEquals(TestUtils.getValue(row, "v", dataType), expectedMap);
} else {
Object expectedValue = sampleValueMap.get(typeArgument1);
assertEquals(TestUtils.getValue(row, "k", typeArgument1), SAMPLE_DATA.get(typeArgument1));
assertEquals(TestUtils.getValue(row, "v", dataType), expectedValue);
}
}
assertEquals(SAMPLE_COLLECTIONS.size(), 255);
assertEquals(COLLECTION_SELECT_STATEMENTS.keySet().size(), SAMPLE_COLLECTIONS.size());
}
@SuppressWarnings("unchecked")
public <T> Set<T> getSet(int i, Class<T> elementsClass) {
DataType type = metadata.getType(i);
if (type.getName() != DataType.Name.SET)
throw new InvalidTypeException(
String.format("Column %s is not of set type", metadata.getName(i)));
Class<?> expectedClass = type.getTypeArguments().get(0).getName().javaType;
if (!elementsClass.isAssignableFrom(expectedClass))
throw new InvalidTypeException(
String.format(
"Column %s is a set of %s (CQL type %s), cannot be retrieve as a set of %s",
metadata.getName(i), expectedClass, type, elementsClass));
ByteBuffer value = data.get(i);
if (value == null) return Collections.<T>emptySet();
return Collections.unmodifiableSet(Codec.<Set<T>>getCodec(type).compose(value));
}
/** Generates the insert statements that will be used in testing */
@SuppressWarnings("unchecked")
private static Collection<String> getCollectionInsertStatements() {
ArrayList<String> insertStatements = new ArrayList<String>();
String tableName;
String key;
String value;
for (DataType dataType : SAMPLE_COLLECTIONS.keySet()) {
HashMap<DataType, Object> sampleValueMap =
(HashMap<DataType, Object>) SAMPLE_COLLECTIONS.get(dataType);
// Create tableName in form of: DataType_TypeArgument[_TypeArgument]
tableName = helperGenerateTableName(dataType);
if (dataType.getName() == DataType.Name.MAP) {
List<DataType> typeArgument = dataType.getTypeArguments();
key = helperStringifiedData(typeArgument.get(0));
value = helperStringifiedData(typeArgument.get(1));
insertStatements.add(String.format(MAP_INSERT_FORMAT, tableName, key, value));
} else if (dataType.getName() == DataType.Name.LIST) {
DataType typeArgument = sampleValueMap.keySet().iterator().next();
key = helperStringifiedData(typeArgument);
// Create the value to be a list of the same 5 elements
value = "[";
for (int i = 0; i < 5; i++) value += key + ',';
value = value.substring(0, value.length() - 1) + ']';
insertStatements.add(String.format(COLLECTION_INSERT_FORMAT, tableName, key, value));
} else {
DataType typeArgument = sampleValueMap.keySet().iterator().next();
key = helperStringifiedData(typeArgument);
value = '{' + key + '}';
insertStatements.add(String.format(COLLECTION_INSERT_FORMAT, tableName, key, value));
}
}
return insertStatements;
}
@SuppressWarnings("unchecked")
public <T> List<T> getList(int i, Class<T> elementsClass) {
DataType type = metadata.getType(i);
if (type.getName() != DataType.Name.LIST)
throw new InvalidTypeException(
String.format("Column %s is not of list type", metadata.getName(i)));
Class<?> expectedClass = type.getTypeArguments().get(0).getName().javaType;
if (!elementsClass.isAssignableFrom(expectedClass))
throw new InvalidTypeException(
String.format(
"Column %s is a list of %s (CQL type %s), cannot be retrieve as a list of %s",
metadata.getName(i), expectedClass, type, elementsClass));
ByteBuffer value = data.get(i);
if (value == null) return Collections.<T>emptyList();
// TODO: we could avoid the getCodec call if we kept a reference to the original message.
return Collections.unmodifiableList(Codec.<List<T>>getCodec(type).compose(value));
}
/** Helper method to generate table names in the form of: DataType_TypeArgument[_TypeArgument] */
private static String helperGenerateTableName(DataType dataType) {
String tableName = dataType.getName().toString();
for (DataType typeArgument : dataType.getTypeArguments()) tableName += "_" + typeArgument;
return tableName;
}
