org.objectstyle.cayenne.dba.sqlserver.SQLServerProcedureAction Maven / Gradle / Ivy
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* The ObjectStyle Group Software License, version 1.1
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* Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
* of the software. All rights reserved.
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* must include the following acknowlegement:
* "This product includes software developed by independent contributors
* and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
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*
* This software consists of voluntary contributions made by many
* individuals and hosted on ObjectStyle Group web site. For more
* information on the ObjectStyle Group, please see
*
* See JIRA CAY-251 for details.
*
*
* @since 1.2
* @author Andrei Adamchik
*/
public class SQLServerProcedureAction extends ProcedureAction {
public SQLServerProcedureAction(ProcedureQuery query, DbAdapter adapter,
EntityResolver entityResolver) {
super(query, adapter, entityResolver);
}
public void performAction(Connection connection, OperationObserver observer)
throws SQLException, Exception {
ProcedureTranslator transl = createTranslator(connection);
CallableStatement statement = (CallableStatement) transl.createStatement();
try {
// stored procedure may contain a mixture of update counts and result sets,
// and out parameters. Read out parameters first, then
// iterate until we exhaust all results
boolean hasResultSet = statement.execute();
// local observer to cache results and provide them to the external observer
// in the order consistent with other adapters.
Observer localObserver = new Observer(observer);
// read query, using local observer
while (true) {
if (hasResultSet) {
ResultSet rs = statement.getResultSet();
try {
RowDescriptor descriptor = describeResultSet(
rs,
processedResultSets++);
readResultSet(rs, descriptor, query, localObserver);
}
finally {
try {
rs.close();
}
catch (SQLException ex) {
}
}
}
else {
int updateCount = statement.getUpdateCount();
if (updateCount == -1) {
break;
}
QueryLogger.logUpdateCount(updateCount);
localObserver.nextCount(query, updateCount);
}
hasResultSet = statement.getMoreResults();
}
// read out parameters to the main observer ... AFTER the main result set
// TODO: I hope SQLServer does not support ResultSets as OUT parameters,
// otherwise
// the order of custom result descriptors will be messed up
readProcedureOutParameters(statement, observer);
// add results back to main observer
localObserver.flushResults(query);
}
finally {
try {
statement.close();
}
catch (SQLException ex) {
}
}
}
class Observer implements OperationObserver {
List results;
List counts;
OperationObserver observer;
Observer(OperationObserver observer) {
this.observer = observer;
}
void flushResults(Query query) {
if (results != null) {
Iterator it = results.iterator();
while (it.hasNext()) {
observer.nextDataRows(query, (List) it.next());
}
results = null;
}
if (counts != null) {
Iterator it = counts.iterator();
while (it.hasNext()) {
observer.nextCount(query, ((Number) it.next()).intValue());
}
counts = null;
}
}
public void nextBatchCount(Query query, int[] resultCount) {
observer.nextBatchCount(query, resultCount);
}
public void nextCount(Query query, int resultCount) {
// does not delegate to wrapped observer
// but instead caches results locally.
if (counts == null) {
counts = new ArrayList();
}
counts.add(new Integer(resultCount));
}
public void nextDataRows(Query query, List dataRows) {
// does not delegate to wrapped observer
// but instead caches results locally.
if (results == null) {
results = new ArrayList();
}
results.add(dataRows);
}
public void nextDataRows(Query q, ResultIterator it) {
observer.nextDataRows(q, it);
}
public void nextGlobalException(Exception ex) {
observer.nextGlobalException(ex);
}
public void nextGeneratedDataRows(Query query, ResultIterator keysIterator) {
observer.nextGeneratedDataRows(query, keysIterator);
}
public void nextQueryException(Query query, Exception ex) {
observer.nextQueryException(query, ex);
}
/**
* @deprecated Unused since 1.2
*/
public Level getLoggingLevel() {
return observer.getLoggingLevel();
}
public boolean isIteratedResult() {
return observer.isIteratedResult();
}
}
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