/*
* 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.jackrabbit.oak.jcr;
import org.apache.jackrabbit.mk.MicroKernelFactory;
import org.apache.jackrabbit.mk.api.MicroKernel;
import org.apache.jackrabbit.oak.api.RepositoryService;
import org.apache.jackrabbit.oak.core.TmpRepositoryService;
import org.apache.jackrabbit.oak.jcr.configuration.RepositoryConfiguration;
import org.apache.jackrabbit.oak.jcr.util.Unchecked;
import javax.jcr.Repository;
import javax.jcr.RepositoryException;
import java.util.HashMap;
import java.util.Map;
import static java.text.MessageFormat.format;
/**
* Poor man's dependency injection
* todo: OAK-17: replace by some more sophisticated mechanism
* todo: OAK-20: remove usages of mk on oak-jcr
* This class implements a poor man's dependency injection mechanism.
* It should be replaced by a more sophisticated mechanism for compile
* time dependency injection mechanism.
*/
public class GlobalContext {
private final Map<Class<?>, Object> instances = new HashMap<Class<?>, Object>();
public GlobalContext(RepositoryConfiguration repositoryConfiguration) throws RepositoryException {
this(MicroKernelFactory.getInstance(repositoryConfiguration.getMicrokernelUrl()));
put(RepositoryConfiguration.class, repositoryConfiguration);
}
public GlobalContext(MicroKernel mk) {
RepositoryService repositoryService = new TmpRepositoryService(mk);
put(RepositoryService.class, repositoryService);
put(MicroKernel.class, mk);
put(Repository.class, new RepositoryImpl(this));
}
public <T> T getInstance(Class<T> forClass) {
T instance = Unchecked.<T>cast(instances.get(forClass));
if (instance == null) {
throw new IllegalStateException(format("Global context does not contain {0}", forClass));
}
return instance;
}
//------------------------------------------< private >---
private <T, I extends T> void put(Class<T> classType, I instance) {
if (instances.containsKey(classType)) {
throw new IllegalStateException(format("Global context already contains {0}", classType));
}
instances.put(classType, instance);
}
}