public void removeSingleElement(Object key, Element value) {
final Delete delete = new Delete(ByteArraySerializer.fromObject(key));
delete.deleteColumns(Bytes.toBytes(VALUES), (byte[]) value.getId());
try {
backingTable.delete(delete);
} catch (IOException e) {
LOG.severe("Cannot delete from backing table");
e.printStackTrace();
}
}
@Override
public List<Mutation>
toRowMutations() { // TODO: change to List<Mutation> once it implements Row
List<Mutation> mutations = new ArrayList<Mutation>(3);
if (deleteRow != null) {
// Include only deleteRow mutation if present because it takes precedence over all others
mutations.add(deleteRow);
} else {
// Because we cannot enforce a not null constraint on a KV column (since we don't know if
// the row exists when
// we upsert it), se instead add a KV that is always emtpy. This allows us to imitate SQL
// semantics given the
// way HBase works.
setValues.add(
SchemaUtil.getEmptyColumnFamily(getColumnFamilies()),
QueryConstants.EMPTY_COLUMN_BYTES,
ts,
ByteUtil.EMPTY_BYTE_ARRAY);
mutations.add(setValues);
if (!unsetValues.isEmpty()) {
mutations.add(unsetValues);
}
}
return mutations;
}
@Override
public void setValue(PColumn column, byte[] byteValue) {
deleteRow = null;
byte[] family = column.getFamilyName().getBytes();
byte[] qualifier = column.getName().getBytes();
PDataType type = column.getDataType();
// Check null, since some types have no byte representation for null
if (byteValue == null || byteValue.length == 0) {
if (!column.isNullable()) {
throw new ConstraintViolationException(
name.getString() + "." + column.getName().getString() + " may not be null");
}
removeIfPresent(setValues, family, qualifier);
unsetValues.deleteColumns(family, qualifier, ts);
} else {
Integer byteSize = column.getByteSize();
if (type.isFixedWidth()) { // TODO: handle multi-byte characters
if (byteValue.length != byteSize) {
throw new ConstraintViolationException(
name.getString()
+ "."
+ column.getName().getString()
+ " must be "
+ byteSize
+ " bytes ("
+ type.toObject(byteValue)
+ ")");
}
} else if (byteSize != null && byteValue.length > byteSize) {
throw new ConstraintViolationException(
name.getString()
+ "."
+ column.getName().getString()
+ " may not exceed "
+ byteSize
+ " bytes ("
+ type.toObject(byteValue)
+ ")");
}
removeIfPresent(unsetValues, family, qualifier);
setValues.add(family, qualifier, ts, byteValue);
}
}