/*******************************************************************************
* Copyright (c) 2012-2017 Codenvy, S.A.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Codenvy, S.A. - initial API and implementation
*******************************************************************************/
package org.eclipse.che.api.machine.server;
import org.eclipse.che.api.core.NotFoundException;
import org.eclipse.che.api.machine.server.spi.InstanceProvider;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
* Provides machines {@link InstanceProvider} implementation by machine type
*
* @author Alexander Garagatyi
*/
@Singleton
public class MachineInstanceProviders {
private final Map<String, InstanceProvider> instanceProviders;
@Inject
public MachineInstanceProviders(Set<InstanceProvider> instanceProviders) {
this.instanceProviders = new HashMap<>(instanceProviders.size());
for (InstanceProvider provider : instanceProviders) {
this.instanceProviders.put(provider.getType(), provider);
}
}
/**
* Returns {@link InstanceProvider} implementation by machine type
*
* @param machineType type of machine implementation
* @return implementation of the machine {code InstanceProvider}
* @throws NotFoundException if no implementation found for provided machine type
*/
public InstanceProvider getProvider(String machineType) throws NotFoundException {
if (hasProvider(machineType)) {
return instanceProviders.get(machineType);
}
throw new NotFoundException(String.format("Can't find machine provider for unsupported machine type '%s'", machineType));
}
/**
* Checks if an {@link InstanceProvider} implementation of the given machine type exists
*
* @param machineType type of machine implementation
* @return <code>true</code> if such implementation exists, <code>false</code> otherwise
*/
public boolean hasProvider(String machineType) {
return instanceProviders.containsKey(machineType);
}
/**
* Returns the machine types of all available {@link InstanceProvider} implementations.
*
* @return a collection of machine types
*/
public Collection<String> getProviderTypes() {
return Collections.unmodifiableSet(instanceProviders.keySet());
}
}