/**
* *****************************************************************************
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE
* file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*****************************************************************************
*/
package org.apache.olingo.odata2.annotation.processor.ref;
import java.util.Calendar;
import org.apache.olingo.odata2.annotation.processor.api.AnnotationServiceFactory;
import org.apache.olingo.odata2.annotation.processor.core.datasource.DataStore;
import org.apache.olingo.odata2.annotation.processor.core.datasource.DataStore.DataStoreException;
import org.apache.olingo.odata2.annotation.processor.ref.model.Building;
import org.apache.olingo.odata2.annotation.processor.ref.model.Employee;
import org.apache.olingo.odata2.annotation.processor.ref.model.Location;
import org.apache.olingo.odata2.annotation.processor.ref.model.Manager;
import org.apache.olingo.odata2.annotation.processor.ref.model.Photo;
import org.apache.olingo.odata2.annotation.processor.ref.model.ResourceHelper;
import org.apache.olingo.odata2.annotation.processor.ref.model.Room;
import org.apache.olingo.odata2.annotation.processor.ref.model.Team;
import org.apache.olingo.odata2.api.ODataCallback;
import org.apache.olingo.odata2.api.ODataDebugCallback;
import org.apache.olingo.odata2.api.ODataService;
import org.apache.olingo.odata2.api.ODataServiceFactory;
import org.apache.olingo.odata2.api.commons.HttpStatusCodes;
import org.apache.olingo.odata2.api.ep.EntityProvider;
import org.apache.olingo.odata2.api.exception.ODataApplicationException;
import org.apache.olingo.odata2.api.exception.ODataException;
import org.apache.olingo.odata2.api.processor.ODataContext;
import org.apache.olingo.odata2.api.processor.ODataErrorCallback;
import org.apache.olingo.odata2.api.processor.ODataErrorContext;
import org.apache.olingo.odata2.api.processor.ODataResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* ODataServiceFactory implemantion based on ListProcessor
* in combination with Annotation-Support-Classes for EdmProvider, DataSource and ValueAccess.
*/
public class AnnotationRefServiceFactory extends ODataServiceFactory {
/**
* Instance holder for all annotation relevant instances which should be used as singleton
* instances within the ODataApplication (ODataService)
*/
private static class AnnotationInstances {
final static String MODEL_PACKAGE = "org.apache.olingo.odata2.annotation.processor.ref.model";
final static ODataService ANNOTATION_ODATA_SERVICE;
static {
try {
ANNOTATION_ODATA_SERVICE = AnnotationServiceFactory.createAnnotationService(MODEL_PACKAGE);
initializeSampleData();
} catch (ODataApplicationException ex) {
throw new RuntimeException("Exception during sample data generation.", ex);
} catch (ODataException ex) {
throw new RuntimeException("Exception during data source initialization generation.", ex);
}
}
}
@Override
public ODataService createService(final ODataContext context) throws ODataException {
// Edm via Annotations and ListProcessor via AnnotationDS with AnnotationsValueAccess
return AnnotationInstances.ANNOTATION_ODATA_SERVICE;
}
@SuppressWarnings("unchecked")
@Override
public <T extends ODataCallback> T getCallback(final Class<? extends ODataCallback> callbackInterface) {
return (T) (callbackInterface.isAssignableFrom(ScenarioErrorCallback.class)
? new ScenarioErrorCallback() : callbackInterface.isAssignableFrom(ODataDebugCallback.class)
? new ScenarioDebugCallback() : super.getCallback(callbackInterface));
}
/*
* Helper classes and methods
*/
/**
* Callback class to enable debugging.
*/
private final class ScenarioDebugCallback implements ODataDebugCallback {
@Override
public boolean isDebugEnabled() {
return true;
}
}
/**
* Callback class for error handling.
*/
private class ScenarioErrorCallback implements ODataErrorCallback {
private final Logger LOG = LoggerFactory.getLogger(ScenarioErrorCallback.class);
@Override
public ODataResponse handleError(final ODataErrorContext context) throws ODataApplicationException {
if (context.getHttpStatus() == HttpStatusCodes.INTERNAL_SERVER_ERROR) {
LOG.error("Internal Server Error", context.getException());
}
return EntityProvider.writeErrorDocument(context);
}
}
private static <T> DataStore<T> getDataStore(final Class<T> clz) throws DataStoreException {
return DataStore.createInMemory(clz, true);
}
private static void initializeSampleData() throws ODataApplicationException {
DataStore<Team> teamDs = getDataStore(Team.class);
teamDs.create(createTeam("Team Alpha", true));
teamDs.create(createTeam("Team Beta", false));
teamDs.create(createTeam("Team Gamma", false));
teamDs.create(createTeam("Team Omega", true));
teamDs.create(createTeam("Team Zeta", true));
DataStore<Building> buildingsDs = getDataStore(Building.class);
Building redBuilding = createBuilding("Red Building");
buildingsDs.create(redBuilding);
Building greenBuilding = createBuilding("Green Building");
buildingsDs.create(greenBuilding);
Building blueBuilding = createBuilding("Blue Building");
buildingsDs.create(blueBuilding);
Building yellowBuilding = createBuilding("Yellow Building");
buildingsDs.create(yellowBuilding);
DataStore<Photo> photoDs = getDataStore(Photo.class);
photoDs.create(createPhoto("Small picture", ResourceHelper.Format.GIF));
photoDs.create(createPhoto("Medium picture", ResourceHelper.Format.PNG));
photoDs.create(createPhoto("Big picture", ResourceHelper.Format.JPEG));
photoDs.create(createPhoto("Huge picture", ResourceHelper.Format.BMP));
DataStore<Room> roomDs = getDataStore(Room.class);
roomDs.create(createRoom("Tiny red room", 5, 1, redBuilding));
roomDs.create(createRoom("Small red room", 20, 1, redBuilding));
roomDs.create(createRoom("Small green room", 20, 1, greenBuilding));
roomDs.create(createRoom("Big blue room", 40, 1, blueBuilding));
roomDs.create(createRoom("Huge blue room", 120, 1, blueBuilding));
roomDs.create(createRoom("Huge yellow room", 120, 1, yellowBuilding));
DataStore<Employee> employeeDataStore = getDataStore(Employee.class);
employeeDataStore.create(createEmployee("first Employee",
new Location("Norge", "8392", "Ä"), 42, null,
photoDs.read().iterator().next().getImage(), photoDs.read().iterator().next().getImageType(),
"http://localhost/image/first.png",
null, teamDs.read().iterator().next(), roomDs.read().iterator().next()));
}
private static Employee createEmployee(final String name,
final Location location, final int age, final Calendar date,
final byte[] image, final String imageType, final String imageUrl,
final Manager manager, final Team team, final Room room) {
Employee employee = new Employee();
employee.setEmployeeName(name);
employee.setLocation(location);
employee.setAge(age);
employee.setEntryDate(date);
employee.setImage(image);
employee.setImageType(imageType);
employee.setImageUri(imageUrl);
employee.setManager(manager);
employee.setTeam(team);
employee.setRoom(room);
return employee;
}
private static Team createTeam(final String teamName, final boolean isScrumTeam) {
Team team = new Team();
team.setName(teamName);
team.setScrumTeam(isScrumTeam);
return team;
}
private static Building createBuilding(final String buildingName) {
Building b = new Building();
b.setName(buildingName);
return b;
}
private static Photo createPhoto(final String name, final ResourceHelper.Format format) {
Photo p = new Photo();
p.setName(name);
p.setImageUri("http://localhost/image/" + name);
p.setType(format.name());
p.setImageType("image/" + format.name().toLowerCase());
p.setImage(ResourceHelper.generateImage(format));
return p;
}
private static Room createRoom(final String name, final int seats, final int version, final Building building) {
Room r = new Room();
r.setName(name);
r.setSeats(seats);
r.setVersion(version);
r.setBuilding(building);
building.addRoom(r);
return r;
}
}