/** Convenient method to just calculate the result count of a given query. */
public static int calculateResultCount(
final ISession session,
final FeatureTypeInfo typeInfo,
final Query query,
final ArcSdeVersionHandler versioningHandler)
throws IOException {
ArcSDEQuery countQuery = null;
final int count;
try {
final SimpleFeatureType fullSchema = typeInfo.getFeatureType();
if (typeInfo.isInProcessView()) {
final SeQueryInfo definitionQuery = typeInfo.getSdeDefinitionQuery();
final PlainSelect viewSelectStatement = typeInfo.getDefinitionQuery();
countQuery =
createInprocessViewQuery(
session, fullSchema, query, definitionQuery, viewSelectStatement);
} else {
final FIDReader fidStrategy = typeInfo.getFidStrategy();
countQuery = createQuery(session, fullSchema, query, fidStrategy, versioningHandler);
}
count = countQuery.calculateResultCount();
} finally {
if (countQuery != null) {
countQuery.close();
}
}
return count;
}
/**
* Fetches an SeRow of data.
*
* @throws IOException (DataSourceException) if the fetching fails
* @throws IllegalStateException if the query was already closed or {@link #execute()} hastn't
* been called yet
*/
public SdeRow fetch() throws IOException, IllegalStateException {
if (this.query == null) {
throw new IllegalStateException("query closed or not yet executed");
}
final SeQuery seQuery = getSeQuery();
// commented out while SeToJTSGeometryFactory is in development
// if (currentRow == null) {
// GeometryFactory geomFac = new SeToJTSGeometryFactory();
// currentRow = new SdeRow(geomFac);
// int geometryIndex = -1;
// for (int i = 0; i < schema.getAttributeCount(); i++) {
// if (schema.getDescriptor(i) instanceof GeometryDescriptor) {
// geometryIndex = i;
// break;
// }
// }
// currentRow.setGeometryIndex(geometryIndex);
// }
// currentRow = session.fetch(seQuery, currentRow);
try {
currentRow = session.fetch(seQuery);
} catch (IOException e) {
close();
String msg = "Error fetching row for " + this.schema.getTypeName() + "[";
msg += "\nFilter: " + filters.sourceFilter;
msg += "\n where clause sent: " + filters.sdeSqlConstruct.getWhere();
msg += "\ngeometry filter:" + filters.geometryFilter;
LOGGER.log(Level.WARNING, msg, e);
throw e;
} catch (Exception e) {
close();
LOGGER.log(Level.SEVERE, "fetching row: " + e.getMessage(), e);
throw new DataSourceException("fetching row: " + e.getMessage(), e);
}
if (currentRow != null) {
currentRow.setPreviousValues(this.previousRowValues);
previousRowValues = currentRow.getAll();
}
return currentRow;
}
/** Convenient method to just calculate the resulting bound box of a given query. */
public static Envelope calculateQueryExtent(
final ISession session,
final FeatureTypeInfo typeInfo,
final Query query,
final ArcSdeVersionHandler versioningHandler)
throws IOException {
final SimpleFeatureType fullSchema = typeInfo.getFeatureType();
final GeometryDescriptor geometryDescriptor = fullSchema.getGeometryDescriptor();
if (geometryDescriptor == null) {
return null;
}
final String defaultGeomAttName = geometryDescriptor.getLocalName();
// we're calculating the bounds, so we'd better be sure and add the
// spatial column to the query's propertynames
final Query realQuery = new Query(query);
realQuery.setPropertyNames(new String[] {defaultGeomAttName});
final ArcSDEQuery boundsQuery;
if (typeInfo.isInProcessView()) {
final SeQueryInfo definitionQuery = typeInfo.getSdeDefinitionQuery();
final PlainSelect viewSelectStatement = typeInfo.getDefinitionQuery();
boundsQuery =
createInprocessViewQuery(
session, fullSchema, realQuery, definitionQuery, viewSelectStatement);
} else {
final FIDReader fidStrategy = typeInfo.getFidStrategy();
boundsQuery = createQuery(session, fullSchema, realQuery, fidStrategy, versioningHandler);
}
Envelope queryExtent = null;
try {
Filter unsupportedFilter = boundsQuery.getFilters().getUnsupportedFilter();
if (unsupportedFilter == Filter.INCLUDE) {
// we can only use an optimized bounds calculation if the
// query is fully supported by sde
queryExtent = boundsQuery.calculateQueryExtent();
}
} finally {
boundsQuery.close();
}
return queryExtent;
}
/**
* Closes the query.
*
* <p>The {@link Session connection} used by the query is not closed by this operation as it was
* provided by the calling code and thus it is its responsibility to handle the connection life
* cycle.
*
* @throws IOException
*/
public void close() throws IOException {
close(this.query, session);
this.query = null;
}
