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Switch to throwing exceptions with all of the info needed to build error messages

This commit is contained in:
Thomas Goyne 2015-08-06 15:31:28 -07:00 committed by Ari Lazier
parent 9dc5165a58
commit d1175fe364
6 changed files with 87 additions and 76 deletions
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21
object_store.cpp
View File

@ -30,6 +30,7 @@
using namespace realm;
namespace {
const char * const c_metadataTableName = "metadata";
const char * const c_versionColumnName = "version";
const size_t c_versionColumnIndex = 0;
@ -42,8 +43,8 @@ const size_t c_primaryKeyPropertyNameColumnIndex = 1;
const size_t c_zeroRowIndex = 0;
const std::string c_object_table_prefix = "class_";
const size_t c_object_table_prefix_length = c_object_table_prefix.length();
const char c_object_table_prefix[] = "class_";
}
const uint64_t ObjectStore::NotVersioned = std::numeric_limits<uint64_t>::max();
@ -119,15 +120,15 @@ void ObjectStore::set_primary_key_for_object(Group *group, StringData object_typ
}
}
std::string ObjectStore::object_type_for_table_name(const std::string &table_name) {
if (table_name.size() >= c_object_table_prefix_length && table_name.compare(0, c_object_table_prefix_length, c_object_table_prefix) == 0) {
return table_name.substr(c_object_table_prefix_length, table_name.length() - c_object_table_prefix_length);
StringData ObjectStore::object_type_for_table_name(StringData table_name) {
if (table_name.begins_with(c_object_table_prefix)) {
return table_name.substr(sizeof(c_object_table_prefix) - 1);
}
return std::string();
return StringData();
}
std::string ObjectStore::table_name_for_object_type(const std::string &object_type) {
return c_object_table_prefix + object_type;
std::string ObjectStore::table_name_for_object_type(StringData object_type) {
return std::string(c_object_table_prefix) + object_type.data();
}
TableRef ObjectStore::table_for_object_type(Group *group, StringData object_type) {
@ -138,7 +139,7 @@ ConstTableRef ObjectStore::table_for_object_type(const Group *group, StringData
return group->get_table(table_name_for_object_type(object_type));
}
TableRef ObjectStore::table_for_object_type_create_if_needed(Group *group, const StringData &object_type, bool &created) {
TableRef ObjectStore::table_for_object_type_create_if_needed(Group *group, StringData object_type, bool &created) {
return group->get_or_add_table(table_name_for_object_type(object_type), &created);
}
@ -494,7 +495,7 @@ void ObjectStore::validate_primary_column_uniqueness(const Group *group, Schema
}
}
void ObjectStore::delete_data_for_object(Group *group, const StringData &object_type) {
void ObjectStore::delete_data_for_object(Group *group, StringData object_type) {
TableRef table = table_for_object_type(group, object_type);
if (table) {
group->remove_table(table->get_index_in_group());

9
object_store.hpp
View File

@ -68,11 +68,14 @@ namespace realm {
static Schema schema_from_group(const Group *group);
// deletes the table for the given type
static void delete_data_for_object(Group *group, const StringData &object_type);
static void delete_data_for_object(Group *group, StringData object_type);
// indicates if this group contains any objects
static bool is_empty(const Group *group);
static std::string table_name_for_object_type(StringData class_name);
static StringData object_type_for_table_name(StringData table_name);
private:
// set a new schema version
static void set_schema_version(Group *group, uint64_t version);
@ -102,9 +105,7 @@ namespace realm {
// must be in write transaction to set
static void set_primary_key_for_object(Group *group, StringData object_type, StringData primary_key);
static TableRef table_for_object_type_create_if_needed(Group *group, const StringData &object_type, bool &created);
static std::string table_name_for_object_type(const std::string &class_name);
static std::string object_type_for_table_name(const std::string &table_name);
static TableRef table_for_object_type_create_if_needed(Group *group, StringData object_type, bool &created);
// returns if any indexes were changed
static bool update_indexes(Group *group, Schema &schema);

28
results.cpp
View File

@ -52,17 +52,17 @@ Results::Results(SharedRealm r, Table& table)
void Results::validate_read() const
{
if (m_realm && !m_realm->check_thread())
throw Error::IncorrectThread;
if (m_realm)
m_realm->verify_thread();
if (m_table && !m_table->is_attached())
throw Error::Invalidated;
throw InvalidatedException();
}
void Results::validate_write() const
{
validate_read();
if (!m_realm || !m_realm->is_in_transaction())
throw Error::NotInWrite;
throw InvalidTransactionException("Must be in a write transaction");
}
size_t Results::size()
@ -96,7 +96,7 @@ RowExpr Results::get(size_t row_ndx)
break;
}
throw Error::OutOfBoundsIndex;
throw OutOfBoundsIndexException{row_ndx, size()};
}
util::Optional<RowExpr> Results::first()
@ -157,10 +157,10 @@ size_t Results::index_of(Row const& row)
{
validate_read();
if (!row) {
throw Error::DetachedAccessor;
throw DetatchedAccessorException{};
}
if (m_table && row.get_table() != m_table) {
throw Error::IncorrectTable;
throw IncorrectTableException{m_table, row.get_table()};
}
return index_of(row.get_index());
}
@ -193,7 +193,7 @@ util::Optional<Mixed> Results::aggregate(size_t column, bool return_none_for_emp
if (!m_table)
return none;
if (column > m_table->get_column_count())
throw Error::OutOfBoundsIndex;
throw OutOfBoundsIndexException{column, m_table->get_column_count()};
auto do_agg = [&](auto const& getter) -> util::Optional<Mixed> {
switch (m_mode) {
@ -220,7 +220,7 @@ util::Optional<Mixed> Results::aggregate(size_t column, bool return_none_for_emp
case type_Float: return do_agg(agg_float);
case type_Int: return do_agg(agg_int);
default:
throw Error::UnsupportedColumnType;
throw UnsupportedColumnTypeException{column, m_table};
}
}
@ -248,7 +248,7 @@ util::Optional<Mixed> Results::sum(size_t column)
[=](auto const& table) { return table.sum_int(column); },
[=](auto const& table) { return table.sum_float(column); },
[=](auto const& table) { return table.sum_double(column); },
[=](auto const&) -> util::None { throw Error::UnsupportedColumnType; });
[=](auto const&) -> util::None { throw UnsupportedColumnTypeException{column, m_table}; });
}
util::Optional<Mixed> Results::average(size_t column)
@ -257,7 +257,7 @@ util::Optional<Mixed> Results::average(size_t column)
[=](auto const& table) { return table.average_int(column); },
[=](auto const& table) { return table.average_float(column); },
[=](auto const& table) { return table.average_double(column); },
[=](auto const&) -> util::None { throw Error::UnsupportedColumnType; });
[=](auto const&) -> util::None { throw UnsupportedColumnTypeException{column, m_table}; });
}
void Results::clear()
@ -319,3 +319,9 @@ Results Results::filter(Query&& q) const
{
return Results(m_realm, get_query().and_query(q), get_sort());
}
Results::UnsupportedColumnTypeException::UnsupportedColumnTypeException(size_t column, const Table* table) {
column_index = column;
column_name = table->get_column_name(column);
column_type = table->get_column_type(column);
}

55
results.hpp
View File

@ -70,7 +70,7 @@ public:
size_t size();
// Get the row accessor for the given index
// Throws OutOfBoundsIndex if index >= size()
// Throws OutOfBoundsIndexException if index >= size()
RowExpr get(size_t index);
// Get a row accessor for the first/last row, or none if the results are empty
@ -79,14 +79,14 @@ public:
util::Optional<RowExpr> last();
// Get the first index of the given row in this results, or not_found
// Throws DetachedAccessor if row is not attached
// Throws IncorrectTable if row belongs to a different table
// Throws DetachedAccessorException if row is not attached
// Throws IncorrectTableException if row belongs to a different table
size_t index_of(size_t row_ndx);
size_t index_of(Row const& row);
// Delete all of the rows in this Results from the Realm
// size() will always be zero afterwards
// Throws NotInWrite
// Throws InvalidTransactionException if not in a write transaction
void clear();
// Create a new Results by further filtering or sorting this Results
@ -96,8 +96,8 @@ public:
// Get the min/max/average/sum of the given column
// All but sum() returns none when there are zero matching rows
// sum() returns 0, except for when it returns none
// Throws UnsupportedColumnType for sum/average on datetime or non-numeric column
// Throws OutOfBoundsIndex for an out-of-bounds column
// Throws UnsupportedColumnTypeException for sum/average on datetime or non-numeric column
// Throws OutOfBoundsIndexException for an out-of-bounds column
util::Optional<Mixed> max(size_t column);
util::Optional<Mixed> min(size_t column);
util::Optional<Mixed> average(size_t column);
@ -113,25 +113,32 @@ public:
// Ideally this would not be public but it's needed for some KVO stuff
Mode get_mode() const { return m_mode; }
// All errors thrown by Results are one of the following error codes
// Invalidated and IncorrectThread can be thrown by all non-noexcept functions
// Other errors are thrown only where indicated
enum class Error {
// The Results object has been invalidated (due to the Realm being invalidated)
Invalidated,
// The Results object is being accessed from the wrong thread
IncorrectThread,
// The containing Realm is not in a write transaction
NotInWrite,
// The Results object has been invalidated (due to the Realm being invalidated)
// All non-noexcept functions can throw this
struct InvalidatedException {};
// The input index parameter was out of bounds
OutOfBoundsIndex,
// The input Row object belongs to a different table
IncorrectTable,
// The input Row object is not attached
DetachedAccessor,
// The requested aggregate operation is not supported for the column type
UnsupportedColumnType
// The input index parameter was out of bounds
struct OutOfBoundsIndexException {
size_t requested;
size_t valid_count;
};
// The input Row object is not attached
struct DetatchedAccessorException { };
// The input Row object belongs to a different table
struct IncorrectTableException {
const Table* expected;
const Table* actual;
};
// The requested aggregate operation is not supported for the column type
struct UnsupportedColumnTypeException {
size_t column_index;
StringData column_name;
DataType column_type;
UnsupportedColumnTypeException(size_t column, const Table* table);
};
private:

16
shared_realm.cpp
View File

@ -236,15 +236,17 @@ static void check_read_write(Realm *realm)
}
}
bool Realm::check_thread() const noexcept
{
return m_thread_id == std::this_thread::get_id();
}
void Realm::verify_thread() const
{
if (!check_thread()) {
throw IncorrectThreadException("Realm accessed from incorrect thread.");
if (m_thread_id != std::this_thread::get_id()) {
throw IncorrectThreadException();
}
}
void Realm::verify_in_write() const
{
if (!is_in_transaction()) {
throw InvalidTransactionException("Cannot modify persisted objects outside of a write transaction.");
}
}

34
shared_realm.hpp
View File

@ -98,8 +98,8 @@ namespace realm {
bool compact();
std::thread::id thread_id() const { return m_thread_id; }
bool check_thread() const noexcept;
void verify_thread() const;
void verify_in_write() const;
// Close this Realm and remove it from the cache. Continuing to use a
// Realm after closing it will produce undefined behavior.
@ -145,11 +145,9 @@ namespace realm {
std::mutex m_mutex;
};
class RealmFileException : public std::runtime_error
{
public:
enum class Kind
{
class RealmFileException : public std::runtime_error {
public:
enum class Kind {
/** Thrown for any I/O related exception scenarios when a realm is opened. */
AccessError,
/** Thrown if the user does not have permission to open or create
@ -169,32 +167,28 @@ namespace realm {
Kind kind() const { return m_kind; }
const std::string& path() const { return m_path; }
private:
private:
Kind m_kind;
std::string m_path;
};
class MismatchedConfigException : public std::runtime_error
{
public:
class MismatchedConfigException : public std::runtime_error {
public:
MismatchedConfigException(std::string message) : std::runtime_error(message) {}
};
class InvalidTransactionException : public std::runtime_error
{
public:
class InvalidTransactionException : public std::runtime_error {
public:
InvalidTransactionException(std::string message) : std::runtime_error(message) {}
};
class IncorrectThreadException : public std::runtime_error
{
public:
IncorrectThreadException(std::string message) : std::runtime_error(message) {}
class IncorrectThreadException : public std::runtime_error {
public:
IncorrectThreadException() : std::runtime_error("Realm accessed from incorrect thread.") {}
};
class UnitializedRealmException : public std::runtime_error
{
public:
class UnitializedRealmException : public std::runtime_error {
public:
UnitializedRealmException(std::string message) : std::runtime_error(message) {}
};
}