Examples with WHERE io.requery.sql.Keyword.WHERE used on opensource projects

Example 1 with WHERE

use of io.requery.sql.Keyword.WHERE in project requery by requery.

the class EntityReader method batchRefresh.

@SafeVarargs
final Iterable<E> batchRefresh(Iterable<E> entities, Attribute<E, ?>... attributes) {
    // if the type is immutable return a new collection with the rebuilt objects
    final Collection<E> collection = type.isImmutable() ? new ArrayList<E>() : null;
    if (keyAttribute == null) {
        // non optimal case objects with multiple keys or no keys
        for (E entity : entities) {
            entity = refresh(entity, type.getProxyProvider().apply(entity), attributes);
            if (collection != null) {
                collection.add(entity);
            }
        }
    } else {
        Set<Expression<?>> selection = new LinkedHashSet<>();
        Attribute[] selectAttributes;
        if (attributes == null || attributes.length == 0) {
            selection = defaultSelection;
            selectAttributes = defaultSelectionAttributes;
        } else {
            LinkedHashSet<Attribute> selectedAttributes = new LinkedHashSet<>();
            selection.add(keyAttribute);
            selectedAttributes.add(keyAttribute);
            for (Attribute<E, ?> attribute : attributes) {
                if (attribute.isVersion()) {
                    selection.add(aliasVersion(attribute));
                } else if (!attribute.isAssociation()) {
                    QueryAttribute<E, ?> queryAttribute = Attributes.query(attribute);
                    selection.add(queryAttribute);
                }
                selectedAttributes.add(attribute);
            }
            selectAttributes = selectedAttributes.toArray(new Attribute[selection.size()]);
        }
        Map<Object, EntityProxy<E>> map = new HashMap<>();
        for (E entity : entities) {
            EntityProxy<E> proxy = type.getProxyProvider().apply(entity);
            Object key = proxy.key();
            if (key == null) {
                throw new MissingKeyException();
            }
            map.put(key, proxy);
        }
        Condition<?, ?> condition = Attributes.query(keyAttribute).in(map.keySet());
        if (type.isCacheable()) {
            final Consumer<E> collector = new Consumer<E>() {

                @Override
                public void accept(E e) {
                    if (collection != null) {
                        collection.add(e);
                    }
                }
            };
            // readResult will merge the results into the target object in cache mode
            ResultReader<E> resultReader = newResultReader(selectAttributes);
            SelectOperation<E> select = new SelectOperation<>(context, resultReader);
            QueryElement<? extends Result<E>> query = new QueryElement<>(QueryType.SELECT, context.getModel(), select);
            try (Result<E> result = query.select(selection).where(condition).get()) {
                result.each(collector);
            }
        } else {
            try (Result<Tuple> result = queryable.select(selection).where(condition).get()) {
                for (Tuple tuple : result) {
                    Object key = tuple.get((Expression) keyAttribute);
                    EntityProxy<E> proxy = map.get(key);
                    synchronized (proxy.syncObject()) {
                        for (Expression expression : selection) {
                            Object value = tuple.get(expression);
                            if (expression instanceof AliasedExpression) {
                                AliasedExpression aliased = (AliasedExpression) expression;
                                expression = aliased.getInnerExpression();
                            }
                            Attribute<E, Object> attribute = Attributes.query((Attribute) expression);
                            proxy.set(attribute, value, PropertyState.LOADED);
                        }
                    }
                }
            }
        }
        // associations TODO can be optimized
        if (attributes != null) {
            for (Attribute<E, ?> attribute : attributes) {
                if (attribute.isAssociation()) {
                    for (EntityProxy<E> proxy : map.values()) {
                        refreshAssociation(proxy, attribute);
                    }
                }
            }
        }
    }
    return collection == null ? entities : collection;
}

Example 2 with WHERE

use of io.requery.sql.Keyword.WHERE in project requery by requery.

the class EntityReader method refresh.

private E refresh(E entity, EntityProxy<E> proxy, final Set<Attribute<E, ?>> attributes) {
    Predicate<Attribute<E, ?>> basicFilter = new Predicate<Attribute<E, ?>>() {

        @Override
        public boolean test(Attribute<E, ?> value) {
            return attributes.contains(value) && (!value.isAssociation() || value.isForeignKey());
        }
    };
    FilteringIterator<Attribute<E, ?>> filterator = new FilteringIterator<>(attributes.iterator(), basicFilter);
    if (filterator.hasNext()) {
        QueryBuilder qb = new QueryBuilder(context.getQueryBuilderOptions()).keyword(SELECT).commaSeparated(filterator, new QueryBuilder.Appender<Attribute<E, ?>>() {

            @Override
            public void append(QueryBuilder qb, Attribute<E, ?> value) {
                String versionColumn = context.getPlatform().versionColumnDefinition().columnName();
                if (value.isVersion() && versionColumn != null) {
                    qb.append(versionColumn).space().append(AS).space().append(value.getName()).space();
                } else {
                    qb.attribute(value);
                }
            }
        }).keyword(FROM).tableName(type.getName()).keyword(WHERE).appendWhereConditions(type.getKeyAttributes());
        String sql = qb.toString();
        try (Connection connection = context.getConnection();
            PreparedStatement statement = connection.prepareStatement(sql)) {
            int index = 1;
            for (Attribute<E, ?> attribute : type.getKeyAttributes()) {
                Object value = proxy.getKey(attribute);
                if (value == null) {
                    throw new MissingKeyException(proxy);
                }
                mapping.write((Expression) attribute, statement, index++, value);
            }
            context.getStatementListener().beforeExecuteQuery(statement, sql, null);
            ResultSet results = statement.executeQuery();
            context.getStatementListener().afterExecuteQuery(statement);
            if (results.next()) {
                Attribute[] selection = new Attribute[attributes.size()];
                attributes.toArray(selection);
                // modify the given entity
                if (type.isImmutable()) {
                    entity = fromBuilder(results, selection);
                } else {
                    entity = fromResult(entity, results, selection);
                }
            }
        } catch (SQLException e) {
            throw new PersistenceException(e);
        }
    }
    // refresh associations
    for (Attribute<E, ?> attribute : attributes) {
        // if it's a foreign key its resolved as part of the basic properties
        if (attribute.isAssociation()) {
            refreshAssociation(proxy, attribute);
        }
    }
    return entity;
}