77 lines
2.4 KiB
Java
77 lines
2.4 KiB
Java
/*
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* Copyright 2013 Robert von Burg <eitch@eitchnet.ch>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package li.strolch.runtime.query.inmemory;
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import java.util.List;
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import li.strolch.model.Order;
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import li.strolch.model.OrderVisitor;
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import li.strolch.model.query.DateSelection;
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import li.strolch.model.query.OrderQuery;
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import li.strolch.model.query.OrderQueryVisitor;
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import li.strolch.model.query.StateSelection;
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import li.strolch.model.query.StrolchTypeNavigation;
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import li.strolch.persistence.api.OrderDao;
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import ch.eitchnet.utils.dbc.DBC;
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/**
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* @author Robert von Burg <eitch@eitchnet.ch>
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*/
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public class InMemoryOrderQueryVisitor extends InMemoryQueryVisitor<Order, OrderDao> implements OrderQueryVisitor {
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public InMemoryOrderQueryVisitor() {
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super();
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}
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@Override
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protected InMemoryQueryVisitor<Order, OrderDao> newInstance() {
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return new InMemoryOrderQueryVisitor();
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}
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public <U> InMemoryQuery<Order, U> visit(OrderQuery orderQuery, OrderVisitor<U> orderVisitor) {
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DBC.PRE.assertNotNull("OrderVisitor may not be null!", orderVisitor);
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orderQuery.accept(this);
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Navigator<Order> navigator = getNavigator();
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if (navigator == null) {
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String msg = "Query is missing a navigation!"; //$NON-NLS-1$
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throw new QueryException(msg);
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}
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List<Selector<Order>> selectors = getSelectors();
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if (selectors.isEmpty())
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return new InMemoryQuery<>(navigator, null, orderVisitor);
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DBC.PRE.assertTrue("Invalid query as it may only contain one selector!", selectors.size() == 1); //$NON-NLS-1$
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return new InMemoryQuery<>(navigator, selectors.get(0), orderVisitor);
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}
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@Override
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public void visit(StrolchTypeNavigation navigation) {
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setNavigator(new OrderTypeNavigator(navigation.getType()));
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}
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@Override
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public void visit(DateSelection selection) {
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addSelector(new DateSelector(selection.getDate()));
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}
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@Override
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public void visit(StateSelection selection) {
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addSelector(new StateSelector(selection.getState()));
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}
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}
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