@Override
public int compare(RowKey key1, RowKey key2) {
CompareToBuilder builder = new CompareToBuilder();
for (String name : sortFields) {
builder.append(key1.getColumnValue(name), key2.getColumnValue(name));
}
return builder.toComparison();
}
/**
* Remove an association row
*
* @param executionEngine the {@link ExecutionEngine} used to run the query
* @param associationKey represents the association
* @param rowKey represents a row in an association
*/
public void removeAssociationRow(
ExecutionEngine executionEngine, AssociationKey associationKey, RowKey rowKey) {
Object[] relationshipValues;
if (associationKey.getMetadata().getRowKeyIndexColumnNames().length > 0) {
int length = associationKey.getMetadata().getRowKeyIndexColumnNames().length;
relationshipValues = new Object[length];
String[] indexColumnNames = associationKey.getMetadata().getRowKeyIndexColumnNames();
for (int i = 0; i < indexColumnNames.length; i++) {
for (int j = 0; j < rowKey.getColumnNames().length; j++) {
if (indexColumnNames[i].equals(rowKey.getColumnNames()[j])) {
relationshipValues[i] = rowKey.getColumnValues()[j];
}
}
}
} else {
relationshipValues = getEntityKey(associationKey, rowKey).getColumnValues();
}
Object[] queryValues =
ArrayHelper.concat(associationKey.getEntityKey().getColumnValues(), relationshipValues);
executionEngine.execute(removeAssociationRowQuery, params(queryValues));
}
/**
* Returns the entity key on the other side of association row represented by the given row key.
*
* <p><b>Note:</b> May only be invoked if the row key actually contains all the columns making up
* that entity key. Specifically, it may <b>not</b> be invoked if the association has index
* columns (maps, ordered collections), as the entity key columns will not be part of the row key
* in this case.
*/
private EntityKey getEntityKey(AssociationKey associationKey, RowKey rowKey) {
String[] associationKeyColumns =
associationKey.getMetadata().getAssociatedEntityKeyMetadata().getAssociationKeyColumns();
Object[] columnValues = new Object[associationKeyColumns.length];
int i = 0;
for (String associationKeyColumn : associationKeyColumns) {
columnValues[i] = rowKey.getColumnValue(associationKeyColumn);
i++;
}
EntityKeyMetadata entityKeyMetadata =
associationKey.getMetadata().getAssociatedEntityKeyMetadata().getEntityKeyMetadata();
return new EntityKey(entityKeyMetadata, columnValues);
}
public SerializableRowKey(RowKey key) {
columnNames = key.getColumnNames();
columnValues = key.getColumnValues();
}