| /* |
| * 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.guacamole.protocol; |
| |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * An abstract representation of a Guacamole instruction, as defined by the |
| * Guacamole protocol. |
| */ |
| public class GuacamoleInstruction { |
| |
| /** |
| * The opcode of this instruction. |
| */ |
| private final String opcode; |
| |
| /** |
| * All arguments of this instruction, in order. |
| */ |
| private final List<String> args; |
| |
| /** |
| * The cached result of converting this GuacamoleInstruction to the format |
| * used by the Guacamole protocol. |
| */ |
| private String protocolForm = null; |
| |
| /** |
| * Creates a new GuacamoleInstruction having the given Operation and |
| * list of arguments values. |
| * |
| * @param opcode The opcode of the instruction to create. |
| * @param args The list of argument values to provide in the new |
| * instruction if any. |
| */ |
| public GuacamoleInstruction(String opcode, String... args) { |
| this.opcode = opcode; |
| this.args = Collections.unmodifiableList(Arrays.asList(args)); |
| } |
| |
| /** |
| * Creates a new GuacamoleInstruction having the given Operation and |
| * list of arguments values. The list given will be used to back the |
| * internal list of arguments and the list returned by getArgs(). |
| * |
| * @param opcode The opcode of the instruction to create. |
| * @param args The list of argument values to provide in the new |
| * instruction if any. |
| */ |
| public GuacamoleInstruction(String opcode, List<String> args) { |
| this.opcode = opcode; |
| this.args = Collections.unmodifiableList(args); |
| } |
| |
| /** |
| * Returns the opcode associated with this GuacamoleInstruction. |
| * @return The opcode associated with this GuacamoleInstruction. |
| */ |
| public String getOpcode() { |
| return opcode; |
| } |
| |
| /** |
| * Returns a List of all argument values specified for this |
| * GuacamoleInstruction. Note that the List returned is immutable. |
| * Attempts to modify the list will result in exceptions. |
| * |
| * @return A List of all argument values specified for this |
| * GuacamoleInstruction. |
| */ |
| public List<String> getArgs() { |
| return args; |
| } |
| |
| /** |
| * Returns this GuacamoleInstruction in the form it would be sent over the |
| * Guacamole protocol. |
| * |
| * @return |
| * This GuacamoleInstruction in the form it would be sent over the |
| * Guacamole protocol. |
| */ |
| @Override |
| public String toString() { |
| |
| // Avoid rebuilding Guacamole protocol form of instruction if already |
| // known |
| if (protocolForm == null) { |
| |
| StringBuilder buff = new StringBuilder(); |
| |
| // Write opcode |
| buff.append(opcode.length()); |
| buff.append('.'); |
| buff.append(opcode); |
| |
| // Write argument values |
| for (String value : args) { |
| buff.append(','); |
| buff.append(value.length()); |
| buff.append('.'); |
| buff.append(value); |
| } |
| |
| // Write terminator |
| buff.append(';'); |
| |
| // Cache result for future calls |
| protocolForm = buff.toString(); |
| |
| } |
| |
| return protocolForm; |
| |
| } |
| |
| } |