/**
* Execute statement to remove entity with given identity from database using given JDBC
* connection.
*
* @param conn CastorConnection holding connection and PersistenceFactory to be used to create
* statement.
* @param identity Identity of the object to remove.
* @throws PersistenceException If failed to remove object from database. This could happen if a
* database access error occurs, type of one of the values to bind is ambiguous or object to
* be deleted does not exist.
*/
public void executeStatement(final CastorConnection conn, final Identity identity)
throws PersistenceException {
CastorStatement stmt = conn.createStatement();
try {
stmt.prepareStatement(_delete);
// bind the identity of the row to be stored into the preparedStatement
for (ColumnValue value : _tableInfo.toSQL(identity)) {
stmt.bindParameter(value.getName(), value.getValue(), value.getType());
}
if (LOG.isDebugEnabled()) {
LOG.debug(Messages.format("jdo.removing", _type, stmt.toString()));
}
// execute prepared statement
int result = stmt.executeUpdate();
// throw exception if execute returned < 1
if (result < 1) {
throw new SQLException("Object to be deleted does not exist!");
}
} catch (SQLException ex) {
LOG.fatal(Messages.format("jdo.deleteFatal", _type, stmt.toString()), ex);
throw new PersistenceException(Messages.format("persist.nested", ex), ex);
} finally {
// close statement
try {
stmt.close();
} catch (SQLException e) {
LOG.warn("Problem closing JDBC statement", e);
}
}
}
/**
* Load key generator definitions, check for duplicate definitions and convert them to key
* generator descriptors.
*
* @param mapping Mapping to load key generator defintions from.
* @throws MappingException If mapping contains more then one key generator definition with same
* name.
*/
private void createKeyGenDescriptors(final MappingRoot mapping) throws MappingException {
Enumeration enumeration = mapping.enumerateKeyGeneratorDef();
while (enumeration.hasMoreElements()) {
KeyGeneratorDef def = (KeyGeneratorDef) enumeration.nextElement();
// resolve name of the key generator definition; if there's an alias
// defined, use it; if not, fall back to the name attribute (this
// is to ensure that for one key generator type (e.g. HIGH-LOW), it is
// possible to define more than one instance with individual
// configuration(s).
String name = def.getAlias();
if (name == null) {
name = def.getName();
}
KeyGeneratorDescriptor desc = _keyGeneratorDescriptors.get(name);
if (desc != null) {
throw new MappingException(Messages.format("mapping.dupKeyGen", name));
}
Properties params = new Properties();
Enumeration enumerateParam = def.enumerateParam();
while (enumerateParam.hasMoreElements()) {
Param par = (Param) enumerateParam.nextElement();
params.put(par.getName(), par.getValue());
}
desc = new KeyGeneratorDescriptor(name, def.getName(), params);
_keyGeneratorDescriptors.put(name, desc);
}
}
/**
* Initialize JDBC DataSource instance with the given database configuration instances and the
* given class loader.
*
* @param database Database configuration.
* @param loader ClassLoader to use.
* @return The initalized DataSource.
* @throws MappingException Problem related to analysing the JDO configuration.
*/
public static DataSource loadDataSource(final Database database, final ClassLoader loader)
throws MappingException {
DataSource dataSource;
Param[] parameters;
DatabaseChoice dbChoice = database.getDatabaseChoice();
String className = dbChoice.getDataSource().getClassName();
ClassLoader classLoader = loader;
if (classLoader == null) {
classLoader = Thread.currentThread().getContextClassLoader();
}
try {
Class dsClass = Class.forName(className, true, classLoader);
dataSource = (DataSource) dsClass.newInstance();
} catch (Exception e) {
String msg = Messages.format("jdo.engine.classNotInstantiable", className);
LOG.error(msg, e);
throw new MappingException(msg, e);
}
parameters = database.getDatabaseChoice().getDataSource().getParam();
setParameters(dataSource, parameters);
return dataSource;
}
/**
* {@inheritDoc}
*
* @see org.castor.persist.AbstractTransactionContext
* #createConnection(org.exolab.castor.persist.LockEngine)
*/
protected Connection createConnection(final LockEngine engine) throws ConnectionFailedException {
// Get a new connection from the engine. Since the engine has no
// transaction association, we must do this sort of round trip. An attempt
// to have the transaction association in the engine inflates the code size
// in other places.
try {
return engine.getDatabaseContext().getConnectionFactory().createConnection();
} catch (SQLException ex) {
throw new ConnectionFailedException(Messages.format("persist.nested", ex), ex);
}
}
public void unmarkReadOnly(final Object o) {
_operation++;
Object object = supportCGLibObject(o);
if (!isTracking(object)) {
throw new IllegalStateException(
Messages.format(
"persist.internal", "Attempt to make read-write object that is not in transaction"));
}
// Add it to our list of read only objects.
_readWriteSet.add(object);
_readOnlySet.remove(object);
}
/**
* Build SQL statement to remove entities of the type this class is responsible for.
*
* @param mapTo Table name retrieved from Class Descriptor trough JDO Nature.
*/
private void buildStatement(final String mapTo) {
// build condition for delete statement
Condition condition = new AndCondition();
for (ColumnInfo col : _tableInfo.getPrimaryKey().getColumns()) {
String name = col.getName();
condition.and(new Column(name).equal(new Parameter(name)));
}
// build delete class hierarchy that represents SQL query
_delete = new Delete(mapTo);
_delete.setCondition(condition);
if (LOG.isTraceEnabled()) {
LOG.trace(Messages.format("jdo.removing", _type, _delete.toString()));
}
}
/**
* Set all the parameters of the given array at the given datasource by calling one of the set
* methods of the datasource.
*
* @param dataSource The datasource to set the parameters on.
* @param params The parameters to set on the datasource.
* @throws MappingException If one of the parameters could not be set.
*/
public static void setParameters(final DataSource dataSource, final Param[] params)
throws MappingException {
Method[] methods = dataSource.getClass().getMethods();
for (int j = 0; j < params.length; j++) {
String name = buildMethodName(params[j].getName());
String value = params[j].getValue();
boolean success = false;
Exception cause = null;
try {
int i = 0;
while (!success && (i < methods.length)) {
Method method = methods[i];
Class[] types = method.getParameterTypes();
if ((method.getName().equals(name)) && (types.length == 1)) {
if (types[0] == String.class) {
method.invoke(dataSource, new Object[] {value});
success = true;
} else if (types[0] == int.class) {
method.invoke(dataSource, new Object[] {new Integer(value)});
success = true;
} else if (types[0] == long.class) {
method.invoke(dataSource, new Object[] {new Long(value)});
success = true;
} else if (types[0] == boolean.class) {
method.invoke(dataSource, new Object[] {new Boolean(value)});
success = true;
}
}
i++;
}
} catch (Exception e) {
cause = e;
}
if (!success || (cause != null)) {
String msg = Messages.format("jdo.engine.datasourceParaFail", params[j].getName(), value);
LOG.error(msg, cause);
throw new MappingException(msg, cause);
}
}
}
/**
* {@inheritDoc}
*
* @see org.castor.persist.AbstractTransactionContext#closeConnections()
*/
protected void closeConnections() throws TransactionAbortedException {
// Go through all the connections opened in this transaction and close them
// one by one. Close all that can be closed, after that report error if any.
Exception error = null;
Iterator iter = connectionsIterator();
while (iter.hasNext()) {
try {
((Connection) iter.next()).close();
} catch (SQLException ex) {
error = ex;
}
}
clearConnections();
if (error != null) {
throw new TransactionAbortedException(Messages.format("persist.nested", error), error);
}
}
protected ClassDescriptor createClassDescriptor(final ClassMapping classMapping)
throws MappingException {
// If there is no SQL information for class, ignore it.
if ((classMapping.getMapTo() == null) || (classMapping.getMapTo().getTable() == null)) {
LOG.info(Messages.format("mapping.ignoringMapping", classMapping.getName()));
return null;
}
// Create the class descriptor, and register the JDO nature with it.
ClassDescriptorImpl clsDesc = new ClassDescriptorImpl();
clsDesc.addNature(ClassDescriptorJDONature.class.getName());
ClassDescriptorJDONature jdoNature = new ClassDescriptorJDONature(clsDesc);
// Obtain the Java class.
Class<?> javaClass = resolveType(classMapping.getName());
if (!Types.isConstructable(javaClass, true)) {
throw new MappingException("mapping.classNotConstructable", javaClass.getName());
}
clsDesc.setJavaClass(javaClass);
// If this class extends another class, we need to obtain the extended
// class and make sure this class indeed extends it.
ClassDescriptor extDesc = getExtended(classMapping, javaClass);
if (extDesc != null) {
if (!(extDesc.hasNature(ClassDescriptorJDONature.class.getName()))) {
throw new IllegalArgumentException("Extended class does not have a JDO descriptor");
}
new ClassDescriptorJDONature(extDesc).addExtended(clsDesc);
}
clsDesc.setExtends(extDesc);
// If this class depends on another class, obtain the class it depends upon.
clsDesc.setDepends(getDepended(classMapping, javaClass));
// Create all field descriptors.
FieldDescriptorImpl[] allFields = createFieldDescriptors(classMapping, javaClass);
// Make sure there are no two fields with the same name.
checkFieldNameDuplicates(allFields, javaClass);
// Set class descriptor containing the field
for (int i = 0; i < allFields.length; i++) {
allFields[i].setContainingClassDescriptor(clsDesc);
}
// Identify identity and normal fields. Note that order must be preserved.
List<FieldDescriptor> fieldList = new ArrayList<FieldDescriptor>(allFields.length);
List<FieldDescriptor> idList = new ArrayList<FieldDescriptor>();
if (extDesc == null) {
// Sort fields into 2 lists based on identity definition of field.
for (int i = 0; i < allFields.length; i++) {
if (!allFields[i].isIdentity()) {
fieldList.add(allFields[i]);
} else {
idList.add(allFields[i]);
}
}
if (idList.size() == 0) {
// Found no identities based on identity definition of field.
// Try to find identities based on identity definition on class.
String[] idNames = classMapping.getIdentity();
if ((idNames == null) || (idNames.length == 0)) {
// There are also no identity definitions on class.
throw new MappingException("mapping.noIdentity", javaClass.getName());
}
FieldDescriptor identity;
for (int i = 0; i < idNames.length; i++) {
identity = findIdentityByName(fieldList, idNames[i], javaClass);
if (identity != null) {
idList.add(identity);
} else {
throw new MappingException("mapping.identityMissing", idNames[i], javaClass.getName());
}
}
}
} else {
// Add all fields of extending class to field list.
for (int i = 0; i < allFields.length; i++) {
fieldList.add(allFields[i]);
}
// Add all identities of extended class to identity list.
FieldDescriptor[] extIds = ((ClassDescriptorImpl) extDesc).getIdentities();
for (int i = 0; i < extIds.length; i++) {
idList.add(extIds[i]);
}
// Search redefined identities in extending class.
FieldDescriptor identity;
for (int i = 0; i < idList.size(); i++) {
String idName = (idList.get(i)).getFieldName();
identity = findIdentityByName(fieldList, idName, javaClass);
if (identity != null) {
idList.set(i, identity);
}
}
}
// Set identities on class descriptor.
FieldDescriptor[] ids = new FieldDescriptor[idList.size()];
clsDesc.setIdentities(idList.toArray(ids));
// Set fields on class descriptor.
FieldDescriptor[] fields = new FieldDescriptor[fieldList.size()];
clsDesc.setFields(fieldList.toArray(fields));
jdoNature.setTableName(classMapping.getMapTo().getTable());
// Set the field name used for object modification checks.
jdoNature.setVersionField(classMapping.getVersion());
extractAndSetAccessMode(jdoNature, classMapping);
extractAndAddCacheParams(jdoNature, classMapping, javaClass);
extractAndAddNamedQueries(jdoNature, classMapping);
extractAndAddNamedNativeQueries(jdoNature, classMapping);
extractAndSetKeyGeneratorDescriptor(jdoNature, classMapping.getKeyGenerator());
return clsDesc;
}
