private String toString(SeQueryInfo qInfo) {
StringBuffer sb = new StringBuffer("SeQueryInfo[\n\tcolumns=");
try {
SeSqlConstruct sql = qInfo.getConstruct();
String[] tables = sql.getTables();
String[] cols = qInfo.getColumns();
String by = null;
try {
by = qInfo.getByClause();
} catch (NullPointerException npe) {
// no-op
}
String where = sql.getWhere();
for (int i = 0; cols != null && i < cols.length; i++) {
sb.append(cols[i]);
if (i < cols.length - 1) sb.append(", ");
}
sb.append("\n\tTables=");
for (int i = 0; i < tables.length; i++) {
sb.append(tables[i]);
if (i < tables.length - 1) sb.append(", ");
}
sb.append("\n\tWhere=");
sb.append(where);
sb.append("\n\tOrderBy=");
sb.append(by);
} catch (SeException e) {
sb.append("Exception retrieving query info properties: " + e.getMessage());
}
sb.append("]");
return sb.toString();
}
/**
* creates an SeQuery with the filters provided to the constructor and returns it. Queries created
* with this method can be used to execute and fetch results. They cannot be used for other
* operations, such as calculating layer extents, or result count.
*
* <p>Difference with {@link #createSeQueryForFetch(Session, String[])} is tha this function tells
* <code>SeQuery.setSpatialConstraints</code> to NOT return geometry based bitmasks, which are
* needed for calculating the query extent and result count, but not for fetching SeRows.
*
* @param propertyNames names of attributes to build the query for, respecting order
* @throws SeException if the ArcSDE Java API throws it while creating the SeQuery or setting it
* the spatial constraints.
* @throws IOException
*/
private SeQuery createSeQueryForFetch(String[] propertyNames) throws SeException, IOException {
if (LOGGER.isLoggable(Level.FINEST)) {
LOGGER.finest(
"constructing new sql query with connection: "
+ session
+ ", propnames: "
+ java.util.Arrays.asList(propertyNames)
+ " sqlConstruct where clause: '"
+ this.filters.getSeSqlConstruct().getWhere()
+ "'");
}
final SeQueryInfo qInfo = filters.getQueryInfo(propertyNames);
if (sortByClause != null) {
qInfo.setByClause(sortByClause);
}
final SeFilter[] spatialConstraints = this.filters.getSpatialFilters();
if (LOGGER.isLoggable(Level.FINER)) {
String msg = "ArcSDE query is: " + toString(qInfo);
LOGGER.finer(msg);
}
final SeQuery seQuery;
seQuery = session.prepareQuery(qInfo, spatialConstraints, versioningHandler);
return seQuery;
}
public static SeQueryInfo parse(ISession session, PlainSelect select)
throws SeException, IOException {
String[] columns = null;
String[] tables = null;
String where = null;
String orderAndOrGroupByClause = null;
if (LOGGER.isLoggable(Level.FINER)) {
LOGGER.finer("building SeQueryInfo to reflect " + select);
}
// obtain needed SeQueryInfo components
columns = getColumns(session, select.getSelectItems());
tables = getTables(select.getFromItems());
Expression whereClause = select.getWhere();
if (whereClause != null) {
where = whereClause.toString();
}
if (select.getGroupByColumnReferences() != null
&& select.getGroupByColumnReferences().size() > 0) {
String gb = PlainSelect.getFormatedList(select.getGroupByColumnReferences(), " GROUP BY ");
orderAndOrGroupByClause = gb;
}
if (select.getOrderByElements() != null && select.getOrderByElements().size() > 0) {
String ob = PlainSelect.orderByToString(select.getOrderByElements());
if (orderAndOrGroupByClause == null) {
orderAndOrGroupByClause = "";
}
orderAndOrGroupByClause += " " + ob;
}
// build SeQueryInfo
SeQueryInfo qinfo = new SeQueryInfo();
qinfo.setColumns(columns);
SeSqlConstruct sqlConstruct = new SeSqlConstruct();
sqlConstruct.setTables(tables);
if (where != null) {
sqlConstruct.setWhere(where);
}
qinfo.setConstruct(sqlConstruct);
if (orderAndOrGroupByClause != null) {
qinfo.setByClause(orderAndOrGroupByClause);
}
return qinfo;
}
/**
* Returns an SeQueryInfo that can be used to retrieve a set of SeRows from an ArcSDE layer or a
* layer with joins. The SeQueryInfo object lacks the set of column names to fetch. It is the
* responsibility of the calling code to call setColumns(String []) on the returned object to
* specify which properties to fetch.
*
* @param unqualifiedPropertyNames non null, possibly empty, list of property names to fetch
* @return
* @throws IOException
*/
public SeQueryInfo getQueryInfo(final String[] unqualifiedPropertyNames) throws IOException {
assert unqualifiedPropertyNames != null;
String[] tables;
String byClause = null;
final SeSqlConstruct plainSqlConstruct = getSeSqlConstruct();
String where = plainSqlConstruct.getWhere();
try {
if (definitionQuery == null) {
tables = new String[] {this.sdeTable.getQualifiedName()};
} else {
tables = definitionQuery.getConstruct().getTables();
String joinWhere = definitionQuery.getConstruct().getWhere();
if (where == null) {
where = joinWhere;
} else {
where = joinWhere == null ? where : (joinWhere + " AND " + where);
}
try {
byClause = definitionQuery.getByClause();
} catch (NullPointerException e) {
// no-op
}
}
final SeQueryInfo qInfo = new SeQueryInfo();
final SeSqlConstruct sqlConstruct = new SeSqlConstruct();
sqlConstruct.setTables(tables);
if (where != null && where.length() > 0) {
sqlConstruct.setWhere(where);
}
final int queriedAttCount = unqualifiedPropertyNames.length;
if (queriedAttCount > 0) {
String[] sdeAttNames = new String[queriedAttCount];
FilterToSQLSDE sqlEncoder = getSqlEncoder();
for (int i = 0; i < queriedAttCount; i++) {
String attName = unqualifiedPropertyNames[i];
String coldef = sqlEncoder.getColumnDefinition(attName);
sdeAttNames[i] = coldef;
}
qInfo.setColumns(sdeAttNames);
}
qInfo.setConstruct(sqlConstruct);
if (byClause != null) {
qInfo.setByClause(byClause);
}
return qInfo;
} catch (SeException e) {
throw new ArcSdeException(e);
}
}
/**
* Creates a query to be executed over an inprocess view (a view defined by a SQL SELECT statement
* at the datastore configuration)
*
* @return the newly created ArcSDEQuery.
* @throws IOException see <i>throws DataSourceException</i> bellow.
* @see ArcSDEDataStore#registerView(String, PlainSelect)
*/
public static ArcSDEQuery createInprocessViewQuery(
final ISession session,
final SimpleFeatureType fullSchema,
final Query query,
final SeQueryInfo definitionQuery,
final PlainSelect viewSelectStatement)
throws IOException {
final Filter filter = query.getFilter();
final FIDReader fidReader = FIDReader.NULL_READER;
// the first table has to be the main layer
final SeSqlConstruct construct;
try {
construct = definitionQuery.getConstruct();
} catch (SeException e) {
throw new ArcSdeException("shouldn't happen: " + e.getMessage(), e);
}
final String[] tables = construct.getTables();
String layerName = tables[0];
// @REVISIT: HACK HERE!, look how to get rid of alias in
// query info, or
// better stop using queryinfo as definition query and use
// the PlainSelect,
// then construct the query info dynamically when needed?
if (layerName.indexOf(" AS") > 0) {
layerName = layerName.substring(0, layerName.indexOf(" AS"));
}
final SeTable sdeTable = session.getTable(layerName);
final SeLayer sdeLayer;
if (fullSchema.getGeometryDescriptor() == null) {
sdeLayer = null;
} else {
sdeLayer = session.getLayer(layerName);
}
// create the set of filters to work over
final ArcSDEQuery.FilterSet filters =
new ArcSDEQuery.FilterSet(
sdeTable,
sdeLayer,
filter,
fullSchema,
definitionQuery,
viewSelectStatement,
fidReader);
final Filter unsupportedFilter = filters.getUnsupportedFilter();
final String[] queryProperties = query.getPropertyNames();
final SimpleFeatureType querySchema =
getQuerySchema(queryProperties, unsupportedFilter, fullSchema);
final ArcSDEQuery sdeQuery;
sdeQuery =
new ArcSDEQuery(
session,
querySchema,
filters,
null,
fidReader,
ArcSdeVersionHandler.NONVERSIONED_HANDLER);
return sdeQuery;
}
