| /* |
| * 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.qpid.tools.utils; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.util.StringTokenizer; |
| |
| public class SimpleCommandParser implements CommandParser |
| { |
| private static final String COMMAND_SEPERATOR = ";"; |
| |
| /** Input source of commands */ |
| protected BufferedReader _reader; |
| |
| /** The next list of commands from the command line */ |
| private StringBuilder _nextCommand = null; |
| |
| public SimpleCommandParser(BufferedReader reader) |
| { |
| _reader = reader; |
| } |
| |
| public boolean more() |
| { |
| return _nextCommand != null; |
| } |
| |
| public boolean isBackground() |
| { |
| return false; |
| } |
| |
| public String[] parse() throws IOException |
| { |
| String[] commands = null; |
| |
| String input = null; |
| |
| if (_nextCommand == null) |
| { |
| input = _reader.readLine(); |
| } |
| else |
| { |
| input = _nextCommand.toString(); |
| _nextCommand = null; |
| } |
| |
| if (input == null) |
| { |
| return null; |
| } |
| |
| StringTokenizer tok = new StringTokenizer(input, " "); |
| |
| int tokenCount = tok.countTokens(); |
| int index = 0; |
| |
| if (tokenCount > 0) |
| { |
| commands = new String[tokenCount]; |
| boolean commandComplete = false; |
| |
| while (tok.hasMoreTokens()) |
| { |
| String next = tok.nextToken(); |
| |
| if (next.equals(COMMAND_SEPERATOR)) |
| { |
| commandComplete = true; |
| _nextCommand = new StringBuilder(); |
| continue; |
| } |
| |
| if (commandComplete) |
| { |
| _nextCommand.append(next); |
| _nextCommand.append(" "); |
| } |
| else |
| { |
| commands[index] = next; |
| index++; |
| } |
| } |
| |
| } |
| |
| //Reduce the String[] if not all the tokens were used in this command. |
| // i.e. there is more than one command on the line. |
| if (index != tokenCount) |
| { |
| String[] shortCommands = new String[index]; |
| System.arraycopy(commands, 0, shortCommands, 0, index); |
| return shortCommands; |
| } |
| else |
| { |
| return commands; |
| } |
| } |
| } |