/** Internal method to read an existing pkg from the database */
synchronized AreaOfInterest read(String id, Connection conn) throws Exception {
// check cache
AreaOfInterest pkg = (AreaOfInterest) cache.get(id);
if (pkg != null) {
return pkg;
}
// pull from database and populate the object
PreparedStatement pstmt =
conn.prepareStatement("SELECT * FROM AreaOfInterest WHERE guid LIKE ?");
pstmt.setString(1, id);
ResultSet rs = pstmt.executeQuery();
pkg = new AreaOfInterest(id);
if (rs.next()) {
pkg.setObjectAlreadyInDB(true);
pkg.setDirty(false);
pkg.setDescription(rs.getString(2));
} else {
throw new DataException("bad AreaOfInterest read");
}
pkg.setDirty(false);
pkg.setObjectAlreadyInDB(true);
// put in the cache
cache.put(pkg.getId(), pkg);
// return the object
return pkg;
} // read
/** Inserts pkg new pkg into the database */
private void insert(AreaOfInterest pkg, Connection conn) throws Exception {
PreparedStatement pstmt = conn.prepareStatement("INSERT INTO AreaOfInterest VALUES (?,?)");
pstmt.setString(1, pkg.getId());
pstmt.setString(2, pkg.getDescription());
int numUpd = pstmt.executeUpdate();
if (numUpd == 1) {
pkg.setObjectAlreadyInDB(true);
pkg.setDirty(false);
} else {
throw new DataException("bad AreaOfInterest update");
}
pstmt.close();
}
/** Internal method to update pkg pkg in the database */
void save(AreaOfInterest pkg, Connection conn) throws Exception {
// update the cache
cache.put(pkg.getId(), pkg);
// if not dirty, return
if (!pkg.isDirty() && pkg.isObjectAlreadyInDB()) {
return;
}
// call either update() or insert()
if (pkg.isObjectAlreadyInDB()) {
update(pkg, conn);
} else {
insert(pkg, conn);
}
} // save
/** Saves an existing pkg to the database */
private void update(AreaOfInterest pkg, Connection conn) throws Exception {
PreparedStatement pstmt =
conn.prepareStatement("UPDATE AreaOfInterest SET description=? WHERE guid LIKE ?");
pstmt.setString(1, pkg.getDescription());
pstmt.setString(2, pkg.getId());
int numUpd = pstmt.executeUpdate();
if (numUpd == 1) {
pkg.setObjectAlreadyInDB(true);
pkg.setDirty(false);
} else {
throw new DataException("bad AreaOfInterest update");
}
pstmt.close();
}