| /* |
| * 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.karaf.shell.commands; |
| |
| import java.io.StringWriter; |
| import java.io.BufferedReader; |
| import java.io.InputStreamReader; |
| import java.io.File; |
| import java.io.OutputStream; |
| import java.io.BufferedWriter; |
| import java.io.BufferedOutputStream; |
| import java.io.FileOutputStream; |
| import java.io.OutputStreamWriter; |
| import java.io.Writer; |
| |
| import org.apache.karaf.shell.console.AbstractAction; |
| import org.apache.felix.gogo.commands.Command; |
| import org.apache.felix.gogo.commands.Option; |
| |
| /** |
| * Grab the text from the standard input and return it as a string. |
| * Also write this text to a file if specified |
| * |
| * @version $Rev: 593392 $ $Date: 2007-11-09 03:14:15 +0100 (Fri, 09 Nov 2007) $ |
| */ |
| @Command(scope = "shell", name = "tac", description = "Captures the STDIN and returns it as a string. Optionally writes the content to a file.") |
| public class TacAction extends AbstractAction { |
| |
| @Option(name = "-f", aliases = {}, description = "Outputs the content to the given file", required = false, multiValued = false) |
| private File file; |
| |
| protected Object doExecute() throws Exception { |
| StringWriter sw = new StringWriter(); |
| Writer[] writers; |
| if (file != null) { |
| writers = new Writer[] { sw, new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file))) }; |
| } else { |
| writers = new Writer[] { sw }; |
| } |
| BufferedReader rdr = new BufferedReader(new InputStreamReader(System.in)); |
| String s = rdr.readLine(); |
| boolean first = true; |
| while (s != null) |
| { |
| for (Writer w : writers) { |
| if (!first) { |
| w.write("\n"); |
| } |
| w.write(s); |
| } |
| first = false; |
| s = rdr.readLine(); |
| } |
| for (Writer w : writers) { |
| w.close(); |
| } |
| return sw.toString(); |
| } |
| } |