/*
* Copyright © 2014 Cask Data, Inc.
*
* Licensed 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 co.cask.cdap.data2.dataset2;
import co.cask.cdap.api.dataset.Dataset;
import co.cask.cdap.api.dataset.DatasetAdmin;
import co.cask.cdap.api.dataset.DatasetProperties;
import co.cask.cdap.api.dataset.DatasetSpecification;
import co.cask.cdap.api.dataset.module.DatasetModule;
import com.google.common.collect.ImmutableList;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import javax.annotation.Nullable;
/**
* Wrapper for {@link DatasetFramework} that namespaces dataset instances names.
*/
public class NamespacedDatasetFramework implements DatasetFramework {
private final DatasetNamespace namespace;
private final DatasetFramework delegate;
public NamespacedDatasetFramework(DatasetFramework delegate, DatasetNamespace namespace) {
this.delegate = delegate;
this.namespace = namespace;
}
@Override
public void addModule(String moduleName, DatasetModule module)
throws DatasetManagementException {
delegate.addModule(moduleName, module);
}
@Override
public void deleteModule(String moduleName) throws DatasetManagementException {
delegate.deleteModule(moduleName);
}
@Override
public void deleteAllModules() throws DatasetManagementException {
delegate.deleteAllModules();
}
@Override
public void addInstance(String datasetType, String datasetInstanceName, DatasetProperties props)
throws DatasetManagementException, IOException {
delegate.addInstance(datasetType, namespace(datasetInstanceName), props);
}
@Override
public void updateInstance(String datasetInstanceName, DatasetProperties props)
throws DatasetManagementException, IOException {
delegate.updateInstance(namespace(datasetInstanceName), props);
}
@Override
public Collection<DatasetSpecification> getInstances() throws DatasetManagementException {
Collection<DatasetSpecification> specs = delegate.getInstances();
// client may pass the name back e.g. do delete instance, so we need to un-namespace it
ImmutableList.Builder<DatasetSpecification> builder = ImmutableList.builder();
for (DatasetSpecification spec : specs) {
DatasetSpecification s = fromNamespaced(spec);
if (s != null) {
builder.add(s);
}
}
return builder.build();
}
@Nullable
@Override
public DatasetSpecification getDatasetSpec(String name) throws DatasetManagementException {
return fromNamespaced(delegate.getDatasetSpec(namespace(name)));
}
@Override
public boolean hasInstance(String instanceName) throws DatasetManagementException {
return delegate.hasInstance(namespace(instanceName));
}
@Override
public boolean hasType(String typeName) throws DatasetManagementException {
return delegate.hasType(typeName);
}
@Override
public void deleteInstance(String datasetInstanceName) throws DatasetManagementException, IOException {
delegate.deleteInstance(namespace(datasetInstanceName));
}
@Override
public void deleteAllInstances() throws DatasetManagementException, IOException {
// todo: delete only those in namespace
delegate.deleteAllInstances();
}
@Override
public <T extends DatasetAdmin> T getAdmin(String datasetInstanceName, ClassLoader classLoader)
throws DatasetManagementException, IOException {
return delegate.getAdmin(namespace(datasetInstanceName), classLoader);
}
@Override
public <T extends Dataset> T getDataset(String datasetInstanceName, Map<String, String> arguments,
ClassLoader classLoader)
throws DatasetManagementException, IOException {
return delegate.getDataset(namespace(datasetInstanceName), arguments, classLoader);
}
@Nullable
private DatasetSpecification fromNamespaced(@Nullable DatasetSpecification spec) {
if (spec == null) {
return null;
}
String notNamespaced = namespace.fromNamespaced(spec.getName());
return notNamespaced == null ? null : DatasetSpecification.changeName(spec, notNamespaced);
}
private String namespace(String datasetInstanceName) {
return namespace.namespace(datasetInstanceName);
}
}