public void SetForeignKeyConstraint(Database ForeignDB,
ForeignKeyDeleteAction OnDelete,
ForeignKeyNullifyDelegate NullifyFunc)
{
if (OnDelete == ForeignKeyDeleteAction.NULLIFY &&
NullifyFunc == null)
{
throw new ArgumentException(
"A nullifying function must " +
"be provided when ForeignKeyDeleteAction.NULLIFY is set.");
}
fdbp = ForeignDB;
fkaction = OnDelete;
nullifier = NullifyFunc;
}
public void TestForeignKeyDelete(DatabaseType dbtype, ForeignKeyDeleteAction action)
{
SetUpTest(true);
string dbFileName = testHome + "/" + testName + ".db";
string fdbFileName = testHome + "/" + testName + "foreign.db";
string sdbFileName = testHome + "/" + testName + "sec.db";
Database primaryDB, fdb;
SecondaryDatabase secDB;
// Open primary database.
if (dbtype == DatabaseType.BTREE)
{
BTreeDatabaseConfig btConfig = new BTreeDatabaseConfig();
btConfig.Creation = CreatePolicy.ALWAYS;
primaryDB = BTreeDatabase.Open(dbFileName, btConfig);
fdb = BTreeDatabase.Open(fdbFileName, btConfig);
}
else if (dbtype == DatabaseType.HASH)
{
HashDatabaseConfig hConfig = new HashDatabaseConfig();
hConfig.Creation = CreatePolicy.ALWAYS;
primaryDB = HashDatabase.Open(dbFileName, hConfig);
fdb = HashDatabase.Open(fdbFileName, hConfig);
}
else if (dbtype == DatabaseType.QUEUE)
{
QueueDatabaseConfig qConfig = new QueueDatabaseConfig();
qConfig.Creation = CreatePolicy.ALWAYS;
qConfig.Length = 4;
primaryDB = QueueDatabase.Open(dbFileName, qConfig);
fdb = QueueDatabase.Open(fdbFileName, qConfig);
}
else if (dbtype == DatabaseType.RECNO)
{
RecnoDatabaseConfig rConfig = new RecnoDatabaseConfig();
rConfig.Creation = CreatePolicy.ALWAYS;
primaryDB = RecnoDatabase.Open(dbFileName, rConfig);
fdb = RecnoDatabase.Open(fdbFileName, rConfig);
}
else
{
throw new ArgumentException("Invalid DatabaseType");
}
// Open secondary database.
if (dbtype == DatabaseType.BTREE)
{
SecondaryBTreeDatabaseConfig secbtConfig =
new SecondaryBTreeDatabaseConfig(primaryDB,
new SecondaryKeyGenDelegate(SecondaryKeyGen));
secbtConfig.Creation = CreatePolicy.ALWAYS;
secbtConfig.Duplicates = DuplicatesPolicy.SORTED;
if (action == ForeignKeyDeleteAction.NULLIFY)
{
secbtConfig.SetForeignKeyConstraint(fdb, action, new ForeignKeyNullifyDelegate(Nullify));
}
else
{
secbtConfig.SetForeignKeyConstraint(fdb, action);
}
secDB = SecondaryBTreeDatabase.Open(sdbFileName, secbtConfig);
}
else if (dbtype == DatabaseType.HASH)
{
SecondaryHashDatabaseConfig sechConfig =
new SecondaryHashDatabaseConfig(primaryDB,
new SecondaryKeyGenDelegate(SecondaryKeyGen));
sechConfig.Creation = CreatePolicy.ALWAYS;
sechConfig.Duplicates = DuplicatesPolicy.SORTED;
if (action == ForeignKeyDeleteAction.NULLIFY)
{
sechConfig.SetForeignKeyConstraint(fdb, action, new ForeignKeyNullifyDelegate(Nullify));
}
else
{
sechConfig.SetForeignKeyConstraint(fdb, action);
}
secDB = SecondaryHashDatabase.Open(sdbFileName, sechConfig);
}
else if (dbtype == DatabaseType.QUEUE)
{
SecondaryQueueDatabaseConfig secqConfig =
new SecondaryQueueDatabaseConfig(primaryDB,
new SecondaryKeyGenDelegate(SecondaryKeyGen));
secqConfig.Creation = CreatePolicy.ALWAYS;
secqConfig.Length = 4;
if (action == ForeignKeyDeleteAction.NULLIFY)
{
secqConfig.SetForeignKeyConstraint(fdb, action, new ForeignKeyNullifyDelegate(Nullify));
}
else
{
secqConfig.SetForeignKeyConstraint(fdb, action);
}
secDB = SecondaryQueueDatabase.Open(sdbFileName, secqConfig);
}
else if (dbtype == DatabaseType.RECNO)
{
SecondaryRecnoDatabaseConfig secrConfig =
new SecondaryRecnoDatabaseConfig(primaryDB,
new SecondaryKeyGenDelegate(SecondaryKeyGen));
secrConfig.Creation = CreatePolicy.ALWAYS;
if (action == ForeignKeyDeleteAction.NULLIFY)
{
secrConfig.SetForeignKeyConstraint(fdb, action, new ForeignKeyNullifyDelegate(Nullify));
}
else
{
secrConfig.SetForeignKeyConstraint(fdb, action);
}
secDB = SecondaryRecnoDatabase.Open(sdbFileName, secrConfig);
}
else
{
throw new ArgumentException("Invalid DatabaseType");
}
/* Use integer keys for Queue/Recno support. */
fdb.Put(new DatabaseEntry(BitConverter.GetBytes(100)),
new DatabaseEntry(BitConverter.GetBytes(1001)));
fdb.Put(new DatabaseEntry(BitConverter.GetBytes(200)),
new DatabaseEntry(BitConverter.GetBytes(2002)));
fdb.Put(new DatabaseEntry(BitConverter.GetBytes(300)),
new DatabaseEntry(BitConverter.GetBytes(3003)));
primaryDB.Put(new DatabaseEntry(BitConverter.GetBytes(1)),
new DatabaseEntry(BitConverter.GetBytes(100)));
primaryDB.Put(new DatabaseEntry(BitConverter.GetBytes(2)),
new DatabaseEntry(BitConverter.GetBytes(200)));
if (dbtype == DatabaseType.BTREE || dbtype == DatabaseType.HASH)
{
primaryDB.Put(new DatabaseEntry(BitConverter.GetBytes(3)),
new DatabaseEntry(BitConverter.GetBytes(100)));
}
try {
fdb.Delete(new DatabaseEntry(BitConverter.GetBytes(100)));
} catch (ForeignConflictException) {
Assert.AreEqual(action, ForeignKeyDeleteAction.ABORT);
}
if (action == ForeignKeyDeleteAction.ABORT)
{
Assert.IsTrue(secDB.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
Assert.IsTrue(primaryDB.Exists(new DatabaseEntry(BitConverter.GetBytes(1))));
Assert.IsTrue(fdb.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
}
else if (action == ForeignKeyDeleteAction.CASCADE)
{
try {
Assert.IsFalse(secDB.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
try {
Assert.IsFalse(primaryDB.Exists(new DatabaseEntry(BitConverter.GetBytes(1))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
try {
Assert.IsFalse(fdb.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
}
else if (action == ForeignKeyDeleteAction.NULLIFY)
{
try {
Assert.IsFalse(secDB.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
Assert.IsTrue(primaryDB.Exists(new DatabaseEntry(BitConverter.GetBytes(1))));
try {
Assert.IsFalse(fdb.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
}
// Close secondary database.
secDB.Close();
// Close primary database.
primaryDB.Close();
// Close foreign database
fdb.Close();
}
public void TestForeignKeyDelete(DatabaseType dbtype, ForeignKeyDeleteAction action)
{
SetUpTest(true);
string dbFileName = testHome + "/" + testName + ".db";
string fdbFileName = testHome + "/" + testName + "foreign.db";
string sdbFileName = testHome + "/" + testName + "sec.db";
Database primaryDB, fdb;
SecondaryDatabase secDB;
// Open primary database.
if (dbtype == DatabaseType.BTREE) {
BTreeDatabaseConfig btConfig = new BTreeDatabaseConfig();
btConfig.Creation = CreatePolicy.ALWAYS;
primaryDB = BTreeDatabase.Open(dbFileName, btConfig);
fdb = BTreeDatabase.Open(fdbFileName, btConfig);
} else if (dbtype == DatabaseType.HASH) {
HashDatabaseConfig hConfig = new HashDatabaseConfig();
hConfig.Creation = CreatePolicy.ALWAYS;
primaryDB = HashDatabase.Open(dbFileName, hConfig);
fdb = HashDatabase.Open(fdbFileName, hConfig);
} else if (dbtype == DatabaseType.QUEUE) {
QueueDatabaseConfig qConfig = new QueueDatabaseConfig();
qConfig.Creation = CreatePolicy.ALWAYS;
qConfig.Length = 4;
primaryDB = QueueDatabase.Open(dbFileName, qConfig);
fdb = QueueDatabase.Open(fdbFileName, qConfig);
} else if (dbtype == DatabaseType.RECNO) {
RecnoDatabaseConfig rConfig = new RecnoDatabaseConfig();
rConfig.Creation = CreatePolicy.ALWAYS;
primaryDB = RecnoDatabase.Open(dbFileName, rConfig);
fdb = RecnoDatabase.Open(fdbFileName, rConfig);
} else {
throw new ArgumentException("Invalid DatabaseType");
}
// Open secondary database.
if (dbtype == DatabaseType.BTREE) {
SecondaryBTreeDatabaseConfig secbtConfig =
new SecondaryBTreeDatabaseConfig(primaryDB,
new SecondaryKeyGenDelegate(SecondaryKeyGen));
secbtConfig.Creation = CreatePolicy.ALWAYS;
secbtConfig.Duplicates = DuplicatesPolicy.SORTED;
if (action == ForeignKeyDeleteAction.NULLIFY)
secbtConfig.SetForeignKeyConstraint(fdb, action, new ForeignKeyNullifyDelegate(Nullify));
else
secbtConfig.SetForeignKeyConstraint(fdb, action);
secDB = SecondaryBTreeDatabase.Open(sdbFileName, secbtConfig);
} else if (dbtype == DatabaseType.HASH) {
SecondaryHashDatabaseConfig sechConfig =
new SecondaryHashDatabaseConfig(primaryDB,
new SecondaryKeyGenDelegate(SecondaryKeyGen));
sechConfig.Creation = CreatePolicy.ALWAYS;
sechConfig.Duplicates = DuplicatesPolicy.SORTED;
if (action == ForeignKeyDeleteAction.NULLIFY)
sechConfig.SetForeignKeyConstraint(fdb, action, new ForeignKeyNullifyDelegate(Nullify));
else
sechConfig.SetForeignKeyConstraint(fdb, action);
secDB = SecondaryHashDatabase.Open(sdbFileName, sechConfig);
} else if (dbtype == DatabaseType.QUEUE) {
SecondaryQueueDatabaseConfig secqConfig =
new SecondaryQueueDatabaseConfig(primaryDB,
new SecondaryKeyGenDelegate(SecondaryKeyGen));
secqConfig.Creation = CreatePolicy.ALWAYS;
secqConfig.Length = 4;
if (action == ForeignKeyDeleteAction.NULLIFY)
secqConfig.SetForeignKeyConstraint(fdb, action, new ForeignKeyNullifyDelegate(Nullify));
else
secqConfig.SetForeignKeyConstraint(fdb, action);
secDB = SecondaryQueueDatabase.Open(sdbFileName, secqConfig);
} else if (dbtype == DatabaseType.RECNO) {
SecondaryRecnoDatabaseConfig secrConfig =
new SecondaryRecnoDatabaseConfig(primaryDB,
new SecondaryKeyGenDelegate(SecondaryKeyGen));
secrConfig.Creation = CreatePolicy.ALWAYS;
if (action == ForeignKeyDeleteAction.NULLIFY)
secrConfig.SetForeignKeyConstraint(fdb, action, new ForeignKeyNullifyDelegate(Nullify));
else
secrConfig.SetForeignKeyConstraint(fdb, action);
secDB = SecondaryRecnoDatabase.Open(sdbFileName, secrConfig);
} else {
throw new ArgumentException("Invalid DatabaseType");
}
/* Use integer keys for Queue/Recno support. */
fdb.Put(new DatabaseEntry(BitConverter.GetBytes(100)),
new DatabaseEntry(BitConverter.GetBytes(1001)));
fdb.Put(new DatabaseEntry(BitConverter.GetBytes(200)),
new DatabaseEntry(BitConverter.GetBytes(2002)));
fdb.Put(new DatabaseEntry(BitConverter.GetBytes(300)),
new DatabaseEntry(BitConverter.GetBytes(3003)));
primaryDB.Put(new DatabaseEntry(BitConverter.GetBytes(1)),
new DatabaseEntry(BitConverter.GetBytes(100)));
primaryDB.Put(new DatabaseEntry(BitConverter.GetBytes(2)),
new DatabaseEntry(BitConverter.GetBytes(200)));
if (dbtype == DatabaseType.BTREE || dbtype == DatabaseType.HASH)
primaryDB.Put(new DatabaseEntry(BitConverter.GetBytes(3)),
new DatabaseEntry(BitConverter.GetBytes(100)));
try {
fdb.Delete(new DatabaseEntry(BitConverter.GetBytes(100)));
} catch (ForeignConflictException) {
Assert.AreEqual(action, ForeignKeyDeleteAction.ABORT);
}
if (action == ForeignKeyDeleteAction.ABORT) {
Assert.IsTrue(secDB.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
Assert.IsTrue(primaryDB.Exists(new DatabaseEntry(BitConverter.GetBytes(1))));
Assert.IsTrue(fdb.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
} else if (action == ForeignKeyDeleteAction.CASCADE) {
try {
Assert.IsFalse(secDB.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
try {
Assert.IsFalse(primaryDB.Exists(new DatabaseEntry(BitConverter.GetBytes(1))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
try {
Assert.IsFalse(fdb.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
} else if (action == ForeignKeyDeleteAction.NULLIFY) {
try {
Assert.IsFalse(secDB.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
Assert.IsTrue(primaryDB.Exists(new DatabaseEntry(BitConverter.GetBytes(1))));
try {
Assert.IsFalse(fdb.Exists(new DatabaseEntry(BitConverter.GetBytes(100))));
} catch (KeyEmptyException) {
Assert.IsTrue(dbtype == DatabaseType.QUEUE || dbtype == DatabaseType.RECNO);
}
}
// Close secondary database.
secDB.Close();
// Close primary database.
primaryDB.Close();
// Close foreign database
fdb.Close();
}
/// <summary>
/// Specify the action taken when a referenced record in the foreign key
/// database is deleted.
/// </summary>
/// <param name="ForeignDB">The foreign key database.</param>
/// <param name="OnDelete">
/// The action taken when a reference record is deleted.
/// </param>
/// <param name="NullifyFunc">
/// When <paramref name="OnDelete"/> is
/// <see cref="ForeignKeyDeleteAction.NULLIFY"/>, NullifyFunc is used to
/// set the foreign key to null.
/// </param>
public void SetForeignKeyConstraint(Database ForeignDB,
ForeignKeyDeleteAction OnDelete,
ForeignKeyNullifyDelegate NullifyFunc)
{
if (OnDelete == ForeignKeyDeleteAction.NULLIFY &&
NullifyFunc == null)
throw new ArgumentException(
"A nullifying function must " +
"be provided when ForeignKeyDeleteAction.NULLIFY is set.");
fdbp = ForeignDB;
fkaction = OnDelete;
nullifier = NullifyFunc;
}
/// <summary>
/// Specify the action taken when a referenced record in the foreign key
/// database is deleted.
/// </summary>
/// <param name="ForeignDB">The foreign key database.</param>
/// <param name="OnDelete">
/// The action taken when a referenced record is deleted.
/// </param>
public void SetForeignKeyConstraint(
Database ForeignDB, ForeignKeyDeleteAction OnDelete)
{
SetForeignKeyConstraint(ForeignDB, OnDelete, null);
}
public void SetForeignKeyConstraint(
Database ForeignDB, ForeignKeyDeleteAction OnDelete)
{
SetForeignKeyConstraint(ForeignDB, OnDelete, null);
}
