co.cask.cdap.cli.command.metadata.GetMetadataPropertiesCommand.java Source code

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Here is the source code for co.cask.cdap.cli.command.metadata.GetMetadataPropertiesCommand.java

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/*
 * Copyright  2015-2016 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.metadata;

import co.cask.cdap.cli.ArgumentName;
import co.cask.cdap.cli.CLIConfig;
import co.cask.cdap.cli.util.AbstractCommand;
import co.cask.cdap.cli.util.table.Table;
import co.cask.cdap.client.MetadataClient;
import co.cask.cdap.proto.id.EntityId;
import co.cask.cdap.proto.metadata.MetadataScope;
import co.cask.common.cli.Arguments;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.inject.Inject;

import java.io.PrintStream;
import java.util.List;
import java.util.Map;
import javax.annotation.Nullable;

/**
 * Gets the metadata properties of an entity.
 */
public class GetMetadataPropertiesCommand extends AbstractCommand {

    private final MetadataClient client;

    @Inject
    public GetMetadataPropertiesCommand(CLIConfig cliConfig, MetadataClient client) {
        super(cliConfig);
        this.client = client;
    }

    @Override
    public void perform(Arguments arguments, PrintStream output) throws Exception {
        EntityId entity = EntityId.fromString(arguments.get(ArgumentName.ENTITY.toString()));
        String scope = arguments.getOptional(ArgumentName.METADATA_SCOPE.toString());
        Map<String, String> properties = scope == null ? client.getProperties(entity.toId())
                : client.getProperties(entity.toId(), MetadataScope.valueOf(scope.toUpperCase()));

        Table table = Table.builder().setHeader("key", "value").setRows(
                Iterables.transform(properties.entrySet(), new Function<Map.Entry<String, String>, List<String>>() {
                    @Nullable
                    @Override
                    public List<String> apply(@Nullable Map.Entry<String, String> entry) {
                        return Lists.newArrayList(entry.getKey(), entry.getValue());
                    }
                })).build();

        cliConfig.getTableRenderer().render(cliConfig, output, table);
    }

    @Override
    public String getPattern() {
        return String.format("get metadata-properties <%s> [scope <%s>]", ArgumentName.ENTITY,
                ArgumentName.METADATA_SCOPE);
    }

    @Override
    public String getDescription() {
        return "Gets the metadata properties of an entity";
    }
}