/** Find and return a single bean using its unique id. */
public <T> T find(OrmQueryRequest<T> request) {
T bean = null;
CQuery<T> cquery = queryBuilder.buildQuery(request);
try {
cquery.prepareBindExecuteQuery();
if (request.isLogSql()) {
logSql(cquery);
}
if (cquery.readBean()) {
bean = cquery.getLoadedBean();
}
if (request.isLogSummary()) {
logFindBeanSummary(cquery);
}
request.executeSecondaryQueries(defaultSecondaryQueryBatchSize);
return bean;
} catch (SQLException e) {
throw cquery.createPersistenceException(e);
} finally {
cquery.close();
}
}
/**
* Read many beans using an iterator (except you need to close() the iterator when you have
* finished).
*/
public <T> QueryIterator<T> findIterate(OrmQueryRequest<T> request) {
CQuery<T> cquery = queryBuilder.buildQuery(request);
request.setCancelableQuery(cquery);
try {
if (!cquery.prepareBindExecuteQuery()) {
// query has been cancelled already
logger.trace("Future fetch already cancelled");
return null;
}
if (request.isLogSql()) {
logSql(cquery);
}
int iterateBufferSize =
request.getSecondaryQueriesMinBatchSize(defaultSecondaryQueryBatchSize);
QueryIterator<T> readIterate = cquery.readIterate(iterateBufferSize, request);
if (request.isLogSummary()) {
logFindManySummary(cquery);
}
return readIterate;
} catch (SQLException e) {
throw cquery.createPersistenceException(e);
}
}
/** Create the Sql select based on the request. */
public CQueryFetchIds(OrmQueryRequest<?> request, CQueryPredicates predicates, String sql) {
this.request = request;
this.query = request.getQuery();
this.sql = sql;
this.maxRows = query.getMaxRows();
query.setGeneratedSql(sql);
this.desc = request.getBeanDescriptor();
this.predicates = predicates;
}
public CQueryPredicates(Binder binder, OrmQueryRequest<?> request) {
this.binder = binder;
this.request = request;
this.query = request.getQuery();
this.bindParams = query.getBindParams();
this.idValue = query.getId();
}
/** Convert named parameters into an OrderedList. */
private void buildBindWhereRawSql(boolean buildSql, boolean parseRaw, DeployParser parser) {
if (buildSql || bindParams != null) {
whereRawSql = buildWhereRawSql();
boolean hasRaw = !"".equals(whereRawSql);
if (hasRaw && parseRaw) {
// parse with encrypted property awareness. This means that if we have
// an encrypted property we will insert special named parameter place
// holders for binding the encryption key values
parser.setEncrypted(true);
whereRawSql = parser.parse(whereRawSql);
parser.setEncrypted(false);
}
if (bindParams != null) {
if (hasRaw) {
whereRawSql =
BindParamsParser.parse(bindParams, whereRawSql, request.getBeanDescriptor());
} else if (query.isRawSql() && !buildSql) {
// RawSql query hit cached query plan. Need to convert
// named parameters into positioned parameters so that
// the named parameters are bound
RawSql.Sql sql = query.getRawSql().getSql();
String s = sql.isParsed() ? sql.getPreWhere() : sql.getUnparsedSql();
if (bindParams.requiresNamedParamsPrepare()) {
BindParamsParser.parse(bindParams, s);
}
}
}
}
}
public String bind(DataBind dataBind) throws SQLException {
StringBuilder bindLog = new StringBuilder();
if (idValue != null) {
// this is a find by id type query...
request.getBeanDescriptor().bindId(dataBind, idValue);
bindLog.append(idValue);
}
if (bindParams != null) {
// bind named and positioned parameters...
binder.bind(bindParams, dataBind, bindLog);
}
if (whereExprBindValues != null) {
for (int i = 0; i < whereExprBindValues.size(); i++) {
Object bindValue = whereExprBindValues.get(i);
binder.bindObject(dataBind, bindValue);
if (i > 0 || idValue != null) {
bindLog.append(",");
}
bindLog.append(bindValue);
}
}
if (filterManyExprBindValues != null) {
for (int i = 0; i < filterManyExprBindValues.size(); i++) {
Object bindValue = filterManyExprBindValues.get(i);
binder.bindObject(dataBind, bindValue);
if (i > 0 || idValue != null) {
bindLog.append(",");
}
bindLog.append(bindValue);
}
}
if (havingNamedParams != null) {
// bind named parameters in having...
bindLog.append(" havingNamed ");
binder.bind(havingNamedParams.list(), dataBind, bindLog);
}
if (havingExprBindValues != null) {
// bind having expression...
bindLog.append(" having ");
for (int i = 0; i < havingExprBindValues.size(); i++) {
Object bindValue = havingExprBindValues.get(i);
binder.bindObject(dataBind, bindValue);
if (i > 0) {
bindLog.append(",");
}
bindLog.append(bindValue);
}
}
return bindLog.toString();
}
/** Build and execute the row count query. */
public <T> int findRowCount(OrmQueryRequest<T> request) {
CQueryRowCount rcQuery = queryBuilder.buildRowCountQuery(request);
try {
int rowCount = rcQuery.findRowCount();
if (request.isLogSql()) {
String logSql = rcQuery.getGeneratedSql();
if (TransactionManager.SQL_LOGGER.isTraceEnabled()) {
logSql += "; --bind(" + rcQuery.getBindLog() + ")";
}
request.logSql(logSql);
}
if (request.isLogSummary()) {
request.getTransaction().logSummary(rcQuery.getSummary());
}
if (request.getQuery().isFutureFetch()) {
logger.debug("Future findRowCount completed!");
request.getTransaction().end();
}
return rowCount;
} catch (SQLException e) {
throw CQuery.createPersistenceException(
e, request.getTransaction(), rcQuery.getBindLog(), rcQuery.getGeneratedSql());
}
}
/** Build and execute the find Id's query. */
public <T> BeanIdList findIds(OrmQueryRequest<T> request) {
CQueryFetchIds rcQuery = queryBuilder.buildFetchIdsQuery(request);
try {
BeanIdList list = rcQuery.findIds();
if (request.isLogSql()) {
String logSql = rcQuery.getGeneratedSql();
if (TransactionManager.SQL_LOGGER.isTraceEnabled()) {
logSql += "; --bind(" + rcQuery.getBindLog() + ")";
}
request.logSql(logSql);
}
if (request.isLogSummary()) {
request.getTransaction().logSummary(rcQuery.getSummary());
}
if (!list.isFetchingInBackground() && request.getQuery().isFutureFetch()) {
// end the transaction for futureFindIds (it had it's own one)
logger.debug("Future findIds completed!");
request.getTransaction().end();
}
return list;
} catch (SQLException e) {
throw CQuery.createPersistenceException(
e, request.getTransaction(), rcQuery.getBindLog(), rcQuery.getGeneratedSql());
}
}
/** Parse/Convert property names to database columns in the where and order by clauses etc. */
private void parsePropertiesToDbColumns(DeployParser deployParser) {
// order by is dependent on the manyProperty (if there is one)
String logicalOrderBy = deriveOrderByWithMany(request.getManyProperty());
if (logicalOrderBy != null) {
dbOrderBy = deployParser.parse(logicalOrderBy);
}
// create a copy of the includes required to support the orderBy
orderByIncludes = new HashSet<String>(deployParser.getIncludes());
dbWhere = deriveWhere(deployParser);
dbFilterMany = deriveFilterMany(deployParser);
dbHaving = deriveHaving(deployParser);
// all includes including ones for manyWhere clause
predicateIncludes = deployParser.getIncludes();
}
/** This combines the sql from named/positioned parameters and expressions. */
private void prepare(boolean buildSql, boolean parseRaw, DeployParser deployParser) {
buildBindWhereRawSql(buildSql, parseRaw, deployParser);
buildBindHavingRawSql(buildSql, parseRaw, deployParser);
SpiExpressionList<?> whereExp = query.getWhereExpressions();
if (whereExp != null) {
DefaultExpressionRequest whereReq = new DefaultExpressionRequest(request, deployParser);
whereExprBindValues = whereExp.buildBindValues(whereReq);
if (buildSql) {
whereExprSql = whereExp.buildSql(whereReq);
}
}
BeanPropertyAssocMany<?> manyProperty = request.getManyProperty();
if (manyProperty != null) {
OrmQueryProperties chunk = query.getDetail().getChunk(manyProperty.getName(), false);
SpiExpressionList<?> filterMany = chunk.getFilterMany();
if (filterMany != null) {
DefaultExpressionRequest filterReq = new DefaultExpressionRequest(request, deployParser);
filterManyExprBindValues = filterMany.buildBindValues(filterReq);
if (buildSql) {
filterManyExprSql = filterMany.buildSql(filterReq);
}
}
}
// having expression
SpiExpressionList<?> havingExpr = query.getHavingExpressions();
if (havingExpr != null) {
DefaultExpressionRequest havingReq = new DefaultExpressionRequest(request, deployParser);
havingExprBindValues = havingExpr.buildBindValues(havingReq);
if (buildSql) {
havingExprSql = havingExpr.buildSql(havingReq);
}
}
if (buildSql) {
parsePropertiesToDbColumns(deployParser);
}
}
/** There is a many property so we need to make sure the ordering is appropriate. */
private String deriveOrderByWithMany(BeanPropertyAssocMany<?> manyProp) {
if (manyProp == null) {
return parseOrderBy();
}
String orderBy = parseOrderBy();
BeanDescriptor<?> desc = request.getBeanDescriptor();
String orderById = desc.getDefaultOrderBy();
if (orderBy == null) {
orderBy = orderById;
}
// check for default ordering on the many property...
String manyOrderBy = manyProp.getFetchOrderBy();
if (manyOrderBy != null) {
orderBy = orderBy + ", " + CQueryBuilder.prefixOrderByFields(manyProp.getName(), manyOrderBy);
}
if (request.isFindById()) {
// only one master bean so should be fine...
return orderBy;
}
if (orderBy.startsWith(orderById)) {
return orderBy;
}
// more than one top level row may be returned so
// we need to make sure their is an order by on the
// top level first (to ensure master/detail construction).
int manyPos = orderBy.indexOf(manyProp.getName());
int idPos = orderBy.indexOf(" " + orderById);
if (manyPos == -1) {
// no ordering of the many
if (idPos == -1) {
// append the orderById so that master level objects are ordered
// even if the orderBy is not unique for the master object
return orderBy + ", " + orderById;
}
// orderById is already in the order by clause
return orderBy;
}
if (idPos <= -1 || idPos >= manyPos) {
if (idPos > manyPos) {
// there was an error with the order by...
String msg =
"A Query on ["
+ desc
+ "] includes a join to a 'many' association ["
+ manyProp.getName();
msg += "] with an incorrect orderBy [" + orderBy + "]. The id property [" + orderById + "]";
msg += " must come before the many property [" + manyProp.getName() + "] in the orderBy.";
msg += " Ebean has automatically modified the orderBy clause to do this.";
logger.warn(msg);
}
// the id needs to come before the manyPropName
orderBy = orderBy.substring(0, manyPos) + orderById + ", " + orderBy.substring(manyPos);
}
return orderBy;
}
private String parseOrderBy() {
return CQueryOrderBy.parse(request.getBeanDescriptor(), query);
}
public void prepare(boolean buildSql) {
DeployParser deployParser = request.createDeployParser();
prepare(buildSql, true, deployParser);
}
public String bind(DataBind dataBind) throws SQLException {
StringBuilder bindLog = new StringBuilder();
if (query.isVersionsBetween() && binder.isBindAsOfWithFromClause()) {
// sql2011 based versions between timestamp syntax
Timestamp start = query.getVersionStart();
Timestamp end = query.getVersionEnd();
bindLog.append("between ").append(start).append(" and ").append(end);
binder.bindObject(dataBind, start);
binder.bindObject(dataBind, end);
bindLog.append(", ");
}
List<String> historyTableAlias = query.getAsOfTableAlias();
if (historyTableAlias != null && binder.isBindAsOfWithFromClause()) {
// bind the asOf value for each table alias as part of the from/join clauses
// there is one effective date predicate per table alias
Timestamp asOf = query.getAsOf();
bindLog.append("asOf ").append(asOf);
for (int i = 0; i < historyTableAlias.size() * binder.getAsOfBindCount(); i++) {
binder.bindObject(dataBind, asOf);
}
bindLog.append(", ");
}
if (idValue != null) {
// this is a find by id type query...
request.getBeanDescriptor().bindId(dataBind, idValue);
bindLog.append(idValue);
}
if (bindParams != null) {
// bind named and positioned parameters...
binder.bind(bindParams, dataBind, bindLog);
}
if (whereExprBindValues != null) {
for (int i = 0; i < whereExprBindValues.size(); i++) {
Object bindValue = whereExprBindValues.get(i);
bindValue = binder.bindObject(dataBind, bindValue);
if (i > 0 || idValue != null) {
bindLog.append(",");
}
bindLog.append(bindValue);
}
}
if (filterManyExprBindValues != null) {
for (int i = 0; i < filterManyExprBindValues.size(); i++) {
Object bindValue = filterManyExprBindValues.get(i);
bindValue = binder.bindObject(dataBind, bindValue);
if (i > 0 || idValue != null) {
bindLog.append(",");
}
bindLog.append(bindValue);
}
}
if (historyTableAlias != null && !binder.isBindAsOfWithFromClause()) {
// bind the asOf value for each table alias after all the normal predicates
// there is one effective date predicate per table alias
Timestamp asOf = query.getAsOf();
bindLog.append(" asOf ").append(asOf);
for (int i = 0; i < historyTableAlias.size() * binder.getAsOfBindCount(); i++) {
binder.bindObject(dataBind, asOf);
}
}
if (havingNamedParams != null) {
// bind named parameters in having...
bindLog.append(" havingNamed ");
binder.bind(havingNamedParams.list(), dataBind, bindLog);
}
if (havingExprBindValues != null) {
// bind having expression...
bindLog.append(" having ");
for (int i = 0; i < havingExprBindValues.size(); i++) {
Object bindValue = havingExprBindValues.get(i);
bindValue = binder.bindObject(dataBind, bindValue);
if (i > 0) {
bindLog.append(",");
}
bindLog.append(bindValue);
}
}
return bindLog.toString();
}
/** Execute the query returning the row count. */
public BeanIdList findIds() throws SQLException {
long startNano = System.nanoTime();
try {
// get the list that we are going to put the id's into.
// This was already set so that it is available to be
// read by other threads (it is a synchronised list)
List<Object> idList = query.getIdList();
if (idList == null) {
// running in foreground thread (not FutureIds query)
idList = Collections.synchronizedList(new ArrayList<Object>());
query.setIdList(idList);
}
BeanIdList result = new BeanIdList(idList);
SpiTransaction t = request.getTransaction();
Connection conn = t.getInternalConnection();
pstmt = conn.prepareStatement(sql);
if (query.getBufferFetchSizeHint() > 0) {
pstmt.setFetchSize(query.getBufferFetchSizeHint());
}
if (query.getTimeout() > 0) {
pstmt.setQueryTimeout(query.getTimeout());
}
bindLog = predicates.bind(new DataBind(pstmt));
ResultSet rset = pstmt.executeQuery();
dataReader = new RsetDataReader(rset);
boolean hitMaxRows = false;
boolean hasMoreRows = false;
rowCount = 0;
DbReadContext ctx = new DbContext();
while (rset.next()) {
Object idValue = desc.getIdBinder().read(ctx);
idList.add(idValue);
// reset back to 0
dataReader.resetColumnPosition();
rowCount++;
if (maxRows > 0 && rowCount == maxRows) {
hitMaxRows = true;
hasMoreRows = rset.next();
break;
}
}
if (hitMaxRows) {
result.setHasMore(hasMoreRows);
}
long exeNano = System.nanoTime() - startNano;
executionTimeMicros = (int) exeNano / 1000;
return result;
} finally {
close();
}
}
/** Find a list/map/set of beans. */
public <T> BeanCollection<T> findMany(OrmQueryRequest<T> request) {
// flag indicating whether we need to close the resources...
boolean useBackgroundToContinueFetch = false;
CQuery<T> cquery = queryBuilder.buildQuery(request);
request.setCancelableQuery(cquery);
try {
if (!cquery.prepareBindExecuteQuery()) {
// query has been cancelled already
logger.trace("Future fetch already cancelled");
return null;
}
if (request.isLogSql()) {
logSql(cquery);
}
BeanCollection<T> beanCollection = cquery.readCollection();
BeanCollectionTouched collectionTouched = request.getQuery().getBeanCollectionTouched();
if (collectionTouched != null) {
// register a listener that wants to be notified when the
// bean collection is first used
beanCollection.setBeanCollectionTouched(collectionTouched);
}
if (cquery.useBackgroundToContinueFetch()) {
// stop the request from putting connection back into pool
// before background fetching is finished.
request.setBackgroundFetching();
useBackgroundToContinueFetch = true;
BackgroundFetch fetch = new BackgroundFetch(cquery);
FutureTask<Integer> future = new FutureTask<Integer>(fetch);
beanCollection.setBackgroundFetch(future);
backgroundExecutor.execute(future);
}
if (request.isLogSummary()) {
logFindManySummary(cquery);
}
request.executeSecondaryQueries(defaultSecondaryQueryBatchSize);
return beanCollection;
} catch (SQLException e) {
throw cquery.createPersistenceException(e);
} finally {
if (useBackgroundToContinueFetch) {
// left closing resources to BackgroundFetch...
} else {
if (cquery != null) {
cquery.close();
}
if (request.getQuery().isFutureFetch()) {
// end the transaction for futureFindIds
// as it had it's own transaction
logger.debug("Future fetch completed!");
request.getTransaction().end();
}
}
}
}
