@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));
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Row[");
for (int i = 0; i < metadata.size(); i++) {
if (i != 0) sb.append(", ");
ByteBuffer bb = data.get(i);
if (bb == null) sb.append("NULL");
else sb.append(Codec.getCodec(metadata.getType(i)).getString(bb));
}
sb.append("]");
return sb.toString();
}
// This method checks the value of the "[applied]" column manually, to avoid instantiating an
// ArrayBackedRow
// object that we would throw away immediately.
private static boolean checkWasApplied(List<ByteBuffer> firstRow, ColumnDefinitions metadata) {
// If the column is not present or not a boolean, we assume the query
// was not a conditional statement, and therefore return true.
if (firstRow == null) return true;
int[] is = metadata.findAllIdx("[applied]");
if (is == null) return true;
int i = is[0];
if (!DataType.cboolean().equals(metadata.getType(i))) return true;
// Otherwise return the value of the column
ByteBuffer value = firstRow.get(i);
if (value == null || value.remaining() == 0) return false;
return TypeCodec.BooleanCodec.instance.deserializeNoBoxing(value);
}
@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));
}
@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));
}
