/*
* Copyright © 2015 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.cli.command;
import co.cask.cdap.cli.ArgumentName;
import co.cask.cdap.cli.CLIConfig;
import co.cask.cdap.cli.ElementType;
import co.cask.cdap.cli.english.Article;
import co.cask.cdap.cli.english.Fragment;
import co.cask.cdap.cli.util.AbstractCommand;
import co.cask.cdap.cli.util.RowMaker;
import co.cask.cdap.cli.util.table.Table;
import co.cask.cdap.client.NamespaceClient;
import co.cask.cdap.proto.Id;
import co.cask.cdap.proto.NamespaceMeta;
import co.cask.common.cli.Arguments;
import co.cask.common.cli.Command;
import com.google.common.collect.Lists;
import com.google.inject.Inject;
import java.io.PrintStream;
import java.util.List;
/**
* {@link Command} to describe a namespace.
*/
public class DescribeNamespaceCommand extends AbstractCommand {
private final NamespaceClient namespaceClient;
@Inject
public DescribeNamespaceCommand(CLIConfig cliConfig, NamespaceClient namespaceClient) {
super(cliConfig);
this.namespaceClient = namespaceClient;
}
@Override
public void perform(Arguments arguments, PrintStream output) throws Exception {
Id.Namespace namespace = Id.Namespace.from(arguments.get(ArgumentName.NAMESPACE_NAME.getName()));
NamespaceMeta namespaceMeta = namespaceClient.get(namespace);
Table table = Table.builder()
.setHeader("name", "description")
.setRows(Lists.newArrayList(namespaceMeta), new RowMaker<NamespaceMeta>() {
@Override
public List<?> makeRow(NamespaceMeta object) {
return Lists.newArrayList(object.getName(), object.getDescription());
}
}).build();
cliConfig.getTableRenderer().render(cliConfig, output, table);
}
@Override
public String getPattern() {
return String.format("describe namespace <%s>", ArgumentName.NAMESPACE_NAME);
}
@Override
public String getDescription() {
return String.format("Describes %s", Fragment.of(Article.A, ElementType.NAMESPACE.getName()));
}
}