private static void addMutation(
Map<ByteBuffer, Map<String, List<Mutation>>> mutationMap,
ByteBuffer key,
String columnFamily,
ByteBuffer superColumn,
ByteBuffer column,
ByteBuffer value) {
Map<String, List<Mutation>> keyMutations = mutationMap.get(key);
// If the key doesn't exist yet, create the mutation holder
if (keyMutations == null) {
keyMutations = new HashMap<String, List<Mutation>>();
mutationMap.put(key, keyMutations);
}
// If the columnfamily doesn't exist yet, create the mutation holder
List<Mutation> columnFamilyMutations = keyMutations.get(columnFamily);
if (columnFamilyMutations == null) {
columnFamilyMutations = new ArrayList<Mutation>();
keyMutations.put(columnFamily, columnFamilyMutations);
}
if (value == null) { // Delete
Deletion deletion = new Deletion(microTimestamp());
if (superColumn != null) {
deletion.setSuper_column(superColumn);
}
if (column != null) { // Single column delete
deletion.setPredicate(
new SlicePredicate().setColumn_names(Collections.singletonList(column)));
} // else Delete entire column family or supercolumn
columnFamilyMutations.add(new Mutation().setDeletion(deletion));
} else { // Insert/update
ColumnOrSuperColumn cosc = new ColumnOrSuperColumn();
if (superColumn != null) {
List<Column> columns = new ArrayList<Column>();
columns.add(new Column(column, value, microTimestamp()));
cosc.setSuper_column(new SuperColumn(superColumn, columns));
} else {
cosc.setColumn(new Column(column, value, microTimestamp()));
}
columnFamilyMutations.add(new Mutation().setColumn_or_supercolumn(cosc));
}
}
