Examples of org.apache.cayenne.access.DataContext.performQuery()

Class org.apache.cayenne.access.DataContext

Examples of org.apache.cayenne.access.DataContext.performQuery()

org.apache.cayenne.access.DataContext.performQuery()
Performs a single selecting query. Various query setting control the behavior of this method and the results returned:
- Query caching policy defines whether the results are retrieved from cache or fetched from the database. Note that queries that use caching must have a name that is used as a caching key.
- Query refreshing policy controls whether to refresh existing data objects and ignore any cached values.
- Query data rows policy defines whether the result should be returned as DataObjects or DataRows.
Since 1.2 takes any Query parameter, not just GenericSelectQuery
@return A list of DataObjects or a DataRows, depending on the value returned by{@link QueryMetadata#isFetchingDataRows()}.

                }


                list = dataContext.performQuery(query);


            } else if (getNamedQuery() != null) {
                list = dataContext.performQuery(getNamedQuery());


            } else if (getQueryName() != null) {
                 list = dataContext.performQuery(getQueryName(), false);


            } else {

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            } else if (getNamedQuery() != null) {
                list = dataContext.performQuery(getNamedQuery());


            } else if (getQueryName() != null) {
                 list = dataContext.performQuery(getQueryName(), false);


            } else {
                Class doClass = form.getDataObjectClass();
                String getterName = ClickUtils.toGetterName(getName());
                Method method = doClass.getMethod(getterName);

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                } else if (getOptionLabel() != null && !orderingApplied) {
                    query.addOrdering(getOptionLabel(), true);
                    orderingApplied = true;
                }


                list = dataContext.performQuery(query);
            }


            if (isRequired() && getOptionList().isEmpty() || isOptional()) {
                getOptionList().add(Option.EMPTY_OPTION);
            }

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        // check values for null
        Expression qual = ExpressionFactory.matchExp(
                objAttr.getName(),
                DEFAULT_VALUE_STRING);
        SelectQuery query = new SelectQuery("Painting", qual);
        List<Persistent> rows = ctxt.performQuery(query);
        assertEquals(nrows, rows.size());


        // clean up
        dbEntity.removeAttribute(column.getName());
        assertTokensAndExecute(node, map, 1, 0);

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        insertValue();
        DataContext contex = createDataContext();
        String ejbql = "select a FROM Artist a";
        EJBQLQuery query = new EJBQLQuery(ejbql);
        query.setCacheStrategy(QueryCacheStrategy.LOCAL_CACHE);
        List<Artist> artist1 = contex.performQuery(query);
        blockQueries();
        List<Artist> artist2;
        try {
            EJBQLQuery query1 = new EJBQLQuery(ejbql);
            query1.setCacheStrategy(QueryCacheStrategy.LOCAL_CACHE);

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        blockQueries();
        List<Artist> artist2;
        try {
            EJBQLQuery query1 = new EJBQLQuery(ejbql);
            query1.setCacheStrategy(QueryCacheStrategy.LOCAL_CACHE);
            artist2 = contex.performQuery(query1);
        }
        finally {
            unblockQueries();
        }

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        DataContext contex = createDataContext();


        String ejbql = "SELECT p.toArtist FROM Painting p";
        EJBQLQuery query = new EJBQLQuery(ejbql);


        List result = contex.performQuery(query);


        assertNotNull(result);
        assertEquals(2, result.size());


        assertEquals(Artist.class, result.get(0).getClass());

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        String ejbql2 = "SELECT p.toArtist, p FROM Painting p";
        EJBQLQuery query2 = new EJBQLQuery(ejbql2);


        List result2 = contex.performQuery(query2);


        assertNotNull(result2);
        assertEquals(2, result2.size());
        assertEquals(2, ((Object[])result2.get(0)).length);

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        assertEquals(Painting.class,((Object[])result2.get(0))[1].getClass());


        String ejbql3 = "SELECT p.toArtist, p.paintingTitle FROM Painting p";
        EJBQLQuery query3 = new EJBQLQuery(ejbql3);


        List result3 = contex.performQuery(query3);


        assertNotNull(result3);
        assertEquals(2, result3.size());
        assertEquals(2, ((Object[])result3.get(0)).length);

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        SelectQuery query = new SelectQuery(Artist.class);
        query.setStatementFetchSize(10);
        
        assertEquals(10, query.getMetaData(dataContext.getEntityResolver()).getStatementFetchSize());
        dataContext.performQuery(query);
        
        SQLTemplate template = new SQLTemplate(Artist.class, "SELECT ARTIST_ID FROM ARTIST");
        template.setStatementFetchSize(10);
        
        assertEquals(10, template.getMetaData(dataContext.getEntityResolver()).getStatementFetchSize());

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