co.cask.cdap.cli.command.system.SearchCommandsCommand.java Source code

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Here is the source code for co.cask.cdap.cli.command.system.SearchCommandsCommand.java

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/*
 * Copyright  2012-2014 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.cli.command.system;

import co.cask.cdap.cli.ArgumentName;
import co.cask.cdap.cli.CommandCategory;
import co.cask.cdap.cli.util.table.TableRendererConfig;
import co.cask.common.cli.Arguments;
import co.cask.common.cli.Command;
import co.cask.common.cli.CommandSet;
import com.google.common.base.Predicate;
import com.google.common.base.Supplier;
import com.google.common.collect.Lists;
import com.google.common.collect.Multimap;

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

/**
 * Searches available commands.
 */
public class SearchCommandsCommand extends HelpCommand {

    private final Supplier<Iterable<CommandSet<Command>>> commands;

    public SearchCommandsCommand(Supplier<Iterable<CommandSet<Command>>> commands,
            TableRendererConfig tableRendererConfig) {
        super(commands, tableRendererConfig);
        this.commands = commands;
    }

    @Override
    public void execute(Arguments arguments, PrintStream output) throws Exception {
        String originalQuery = arguments.get(ArgumentName.QUERY.getName());
        String queryString = originalQuery;

        if (!queryString.startsWith("^")) {
            queryString = "^.*?" + queryString;
        }

        if (!queryString.endsWith("$")) {
            queryString = queryString + ".+?$";
        }

        final String query = queryString;
        Predicate<Command> filter = new Predicate<Command>() {
            @Override
            public boolean apply(@Nullable Command input) {
                return input != null && input.getPattern().matches(query);
            }
        };

        output.println();
        Multimap<String, Command> categorizedCommands = categorizeCommands(commands.get(), CommandCategory.GENERAL,
                filter);
        if (categorizedCommands.isEmpty()) {
            output.printf("No matches found for \"%s\"", originalQuery);
            output.println();
        } else {
            output.printf("Listing matches for \"%s\":", originalQuery);
            output.println();
            output.println();

            for (CommandCategory category : CommandCategory.values()) {
                List<Command> commandList = Lists.newArrayList(categorizedCommands.get(category.getName()));
                if (commandList.isEmpty()) {
                    continue;
                }

                printCommands(output, category.getName(), commandList);
            }
        }
    }

    @Override
    public String getPattern() {
        return String.format("cli search commands <%s>", ArgumentName.QUERY);
    }

    @Override
    public String getDescription() {
        return "Searches available commands using regex.";
    }
}