@Override
public VDBMetaData getVDB() {
ConnectionImpl connection = null;
if (this.vdb == null) {
try {
connection = getConnection();
LocalServerConnection lsc = (LocalServerConnection) connection.getServerConnection();
VDBMetaData vdb = lsc.getWorkContext().getVDB();
if (vdb == null) {
throw new NotFoundException(
ODataPlugin.Util.gs(ODataPlugin.Event.TEIID16001, this.vdbName, this.vdbVersion));
}
this.vdb = vdb;
} catch (SQLException e) {
throw new ServerErrorException(e.getMessage(), e);
} finally {
if (connection != null) {
try {
connection.close();
} catch (SQLException e) {
}
}
}
}
return this.vdb;
}
@Override
public EntityList executeSQL(
Query query,
List<SQLParam> parameters,
EdmEntitySet entitySet,
LinkedHashMap<String, Boolean> projectedColumns,
QueryInfo queryInfo) {
ConnectionImpl connection = null;
try {
boolean cache = queryInfo != null && this.batchSize > 0;
if (cache) {
CacheHint hint = new CacheHint();
hint.setTtl(this.cacheTime);
hint.setScope(CacheDirective.Scope.USER);
hint.setMinRows(Long.valueOf(this.batchSize));
query.setCacheHint(hint);
}
boolean getCount = false;
if (queryInfo != null) {
getCount = queryInfo.inlineCount == InlineCount.ALLPAGES;
if (!getCount && (queryInfo.top != null || queryInfo.skip != null)) {
if (queryInfo.top != null && queryInfo.skip != null) {
query.setLimit(new Limit(new Constant(queryInfo.skip), new Constant(queryInfo.top)));
} else if (queryInfo.top != null) {
query.setLimit(new Limit(new Constant(0), new Constant(queryInfo.top)));
}
}
}
connection = getConnection();
String sessionId = connection.getServerConnection().getLogonResult().getSessionID();
String skipToken = null;
if (queryInfo != null && queryInfo.skipToken != null) {
skipToken = queryInfo.skipToken;
if (cache) {
int idx = queryInfo.skipToken.indexOf(DELIMITER);
sessionId = queryInfo.skipToken.substring(0, idx);
skipToken = queryInfo.skipToken.substring(idx + 2);
}
}
String sql = query.toString();
if (cache) {
sql += " /* " + sessionId + " */"; // $NON-NLS-1$ //$NON-NLS-2$
}
LogManager.logDetail(LogConstants.CTX_ODATA, "Teiid-Query:", sql); // $NON-NLS-1$
final PreparedStatement stmt =
connection.prepareStatement(
sql,
cache ? ResultSet.TYPE_SCROLL_INSENSITIVE : ResultSet.TYPE_FORWARD_ONLY,
ResultSet.CONCUR_READ_ONLY);
if (parameters != null && !parameters.isEmpty()) {
for (int i = 0; i < parameters.size(); i++) {
stmt.setObject(i + 1, parameters.get(i).value, parameters.get(i).sqlType);
}
}
final ResultSet rs = stmt.executeQuery();
if (projectedColumns == null) {
projectedColumns = new LinkedHashMap<String, Boolean>();
for (int i = 0; i < rs.getMetaData().getColumnCount(); i++) {
projectedColumns.put(rs.getMetaData().getColumnLabel(i + 1), Boolean.TRUE);
}
}
EntityList result = new EntityList(invalidCharacterReplacement);
HashMap<String, EdmProperty> propertyTypes = new HashMap<String, EdmProperty>();
EdmEntityType entityType = entitySet.getType();
Iterator<EdmProperty> propIter = entityType.getProperties().iterator();
while (propIter.hasNext()) {
EdmProperty prop = propIter.next();
propertyTypes.put(prop.getName(), prop);
}
// skip to the initial position
int count = 0;
int skipSize = 0;
// skip based upon the skip value
if (getCount && queryInfo.skip != null) {
skipSize = queryInfo.skip;
}
// skip based upon the skipToken
if (skipToken != null) {
skipSize += Integer.parseInt(skipToken);
}
if (skipSize > 0) {
count += skip(cache, rs, skipSize);
}
// determine the number of records to return
int size = batchSize;
int top = Integer.MAX_VALUE;
if (getCount && queryInfo.top != null) {
top = queryInfo.top;
size = top;
if (batchSize > 0) {
size = Math.min(batchSize, size);
}
} else if (size < 1) {
size = Integer.MAX_VALUE;
}
// build the results
for (int i = 0; i < size; i++) {
if (!rs.next()) {
break;
}
count++;
result.addEntity(rs, propertyTypes, projectedColumns, entitySet);
}
// set the count
if (getCount) {
if (!cache) {
while (rs.next()) {
count++;
}
} else {
rs.last();
count = rs.getRow();
}
}
result.setCount(count);
// set the skipToken if needed
if (cache && result.size() == this.batchSize) {
int end = skipSize + result.size();
if (getCount) {
if (end < Math.min(top, count)) {
result.setNextToken(nextToken(cache, sessionId, end));
}
} else if (rs.next()) {
result.setNextToken(nextToken(cache, sessionId, end));
// will force the entry to cache or is effectively a no-op when already cached
rs.last();
}
}
return result;
} catch (Exception e) {
throw new ServerErrorException(e.getMessage(), e);
} finally {
if (connection != null) {
try {
connection.close();
} catch (SQLException e) {
}
}
}
}