Examples of org.datanucleus.store.query.Query

org.datanucleus.store.query.Query
Abstract implementation for all queries in DataNucleus. Implementations of JDOQL, SQL, JPQL, etc should extend this. Parameters can be implicit (defined in the query via syntaxes such as ":name", "?1") or explicit (defined via declareParameters). They can also be named or numbered. When passing a map of parameters with values, they are keyed by String (named parameters) or Integer (numbered parameters).

                        queryString += " WHERE " + URLDecoder.decode(req.getQueryString(), "UTF-8");
                    }
                    try
                    {
                        api.getTransaction().begin();
                        Query query = api.newQuery("JDOQL", queryString);
                        List result = (List)query.execute();
                        JSONArray array = new JSONArray(result);
                        resp.getWriter().write(array.toString());
                        resp.setHeader("Content-Type", "application/json");
                        resp.setStatus(200);
                        api.getTransaction().commit();

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                    queryString += " WHERE " + URLDecoder.decode(req.getQueryString(), "UTF-8");
                }
                try
                {
                    api.getTransaction().begin();
                    Query query = api.newQuery("JDOQL", queryString);
                    /* Object result = */query.execute();
                    resp.setStatus(200);
                    api.getTransaction().commit();
                }
                finally
                {

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        if (subqueryAliases != null)
        {
            for (int i=0;i<subqueryAliases.length;i++)
            {
                // Evaluate subquery first
                Query subquery = query.getSubqueryForVariable(subqueryAliases[i]).getQuery();
                QueryCompilation subqueryCompilation =
                    compilation.getCompilationForSubquery(subqueryAliases[i]);
                if (subqueryCompilation.getExprFrom() != null)
                {
                    // TODO Evaluate "from"

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                            }


                            String subqueryStr = content.substring(i+1, endPosition).trim();
                            String subqueryVarName = "DATANUCLEUS_SUBQUERY_" + subqueryNum;


                            Query subquery = (Query)ClassUtils.newInstance(query.getClass(),
                                new Class[]{ExecutionContext.class, String.class},
                                new Object[] {query.getExecutionContext(), subqueryStr});
                            // TODO Set the type of the variable
                            query.addSubquery(subquery, "double " + subqueryVarName, null, null);

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                            }


                            String subqueryStr = content.substring(i+1, endPosition).trim();
                            String subqueryVarName = "DATANUCLEUS_SUBQUERY_" + subqueryNum;


                            Query subquery = (Query)ClassUtils.newInstance(query.getClass(),
                                new Class[]{ExecutionContext.class, String.class},
                                new Object[] {query.getExecutionContext(), subqueryStr});
                            // TODO Set the type of the variable
                            query.addSubquery(subquery, "double " + subqueryVarName, null, null);

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     * @return The internal DataNucleus query
     */
    protected Query getInternalQuery()
    {
        // Create a DataNucleus query and set the generic compilation
        Query internalQuery =
            ec.getStoreManager().getQueryManager().newQuery("JDOQL", ec, toString());
        internalQuery.setIgnoreCache(ignoreCache);
        if (!subclasses)
        {
            internalQuery.setSubclasses(false);
        }
        if (type == QueryType.SELECT)
        {
            if (resultDistinct != null)
            {
                internalQuery.setResultDistinct(resultDistinct.booleanValue());
            }
            internalQuery.setResultClass(resultClass);
            internalQuery.setUnique(unique);
        }
        if (extensions != null)
        {
            internalQuery.setExtensions(extensions);
        }
        if (fp != null)
        {
            internalQuery.setFetchPlan(((JDOFetchPlan)fp).getInternalFetchPlan());
        }
        if (type == QueryType.SELECT)
        {
            if (candidates != null)
            {
                internalQuery.setCandidates(candidates);
            }
        }


        QueryCompilation compilation = getCompilation();
        internalQuery.setCompilation(compilation);


        return internalQuery;
    }

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        updateVals = null;
        unique = false;


        try
        {
            Query internalQuery = getInternalQuery();
            if (parameterValuesByName != null || parameterExprByName != null)
            {
                validateParameters();


                return internalQuery.deletePersistentAll(parameterValuesByName);
            }
            else
            {
                return internalQuery.deletePersistentAll();
            }
        }
        catch (NucleusException jpe)
        {
            // Convert any exceptions into what JDO expects

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        if (internalQueries != null)
        {
            Iterator<Query> iter = internalQueries.iterator();
            while (iter.hasNext())
            {
                Query query = iter.next();
                query.close(result);
            }
        }
    }

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        if (internalQueries != null)
        {
            Iterator<Query> iter = internalQueries.iterator();
            while (iter.hasNext())
            {
                Query query = iter.next();
                query.closeAll();
            }
            internalQueries.clear();
            internalQueries = null;
        }
    }

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        if (subqueryAliases != null)
        {
            for (int i=0;i<subqueryAliases.length;i++)
            {
                // Evaluate subquery first
                Query subquery = query.getSubqueryForVariable(subqueryAliases[i]).getQuery();
                QueryCompilation subqueryCompilation = 
                    compilation.getCompilationForSubquery(subqueryAliases[i]);
                Collection subqueryResult = evaluateSubquery(subquery, executeCandidates, subqueryCompilation);


                if (QueryUtils.queryReturnsSingleRow(subquery))

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org.datanucleus.api.jdo.query.JDOTypesafeQuery

org.datanucleus.api.rest.RestServlet

org.datanucleus.management.runtime.QueryRuntime

org.datanucleus.query.compiler.QueryCompilation

org.datanucleus.query.evaluator.JavaQueryEvaluator

org.datanucleus.query.expression.ParameterExpression

org.datanucleus.query.JDOQLSingleStringParser$Compiler

org.datanucleus.query.JPQLSingleStringParser$Compiler

org.datanucleus.query.SQLSingleStringParser$Compiler

org.datanucleus.query.symbol.Symbol

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