| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.twill.api; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * Represents command objects. |
| */ |
| public interface Command { |
| |
| String getCommand(); |
| |
| Map<String, String> getOptions(); |
| |
| /** |
| * Builder for creating {@link Command} object. |
| */ |
| final class Builder { |
| |
| private final String command; |
| private final Map<String, String> options = new HashMap<String, String>(); |
| |
| public static Builder of(String command) { |
| if (command == null) { |
| throw new IllegalArgumentException("Command cannot be null."); |
| } |
| return new Builder(command); |
| } |
| |
| public Builder addOption(String key, String value) { |
| options.put(key, value); |
| return this; |
| } |
| |
| public Builder addOptions(Map<String, String> map) { |
| options.putAll(map); |
| return this; |
| } |
| |
| public Command build() { |
| return new SimpleCommand(command, Collections.unmodifiableMap(new HashMap<String, String>(options))); |
| } |
| |
| private Builder(String command) { |
| this.command = command; |
| } |
| |
| /** |
| * Simple implementation of {@link org.apache.twill.api.Command}. |
| */ |
| private static final class SimpleCommand implements Command { |
| private final String command; |
| private final Map<String, String> options; |
| |
| SimpleCommand(String command, Map<String, String> options) { |
| this.command = command; |
| this.options = options; |
| } |
| |
| @Override |
| public String getCommand() { |
| return command; |
| } |
| |
| @Override |
| public Map<String, String> getOptions() { |
| return options; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| SimpleCommand that = (SimpleCommand) o; |
| return command.equals(that.command) && options.equals(that.options); |
| |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = command.hashCode(); |
| result = 31 * result + options.hashCode(); |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return "SimpleCommand{" + |
| "command='" + command + '\'' + |
| ", options=" + options + |
| '}'; |
| } |
| } |
| } |
| } |