001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.xbean.command; 018 019 import groovy.lang.GroovyShell; 020 import org.codehaus.groovy.runtime.InvokerHelper; 021 022 import java.io.BufferedReader; 023 import java.io.IOException; 024 import java.io.InputStream; 025 import java.io.InputStreamReader; 026 import java.io.PrintStream; 027 028 public class GroovySh implements Command { 029 public static void register() { 030 CommandRegistry.register("groovysh", GroovySh.class); 031 } 032 033 public int main(String[] args, InputStream in, PrintStream out) { 034 GroovyShell shell = new GroovyShell(); 035 BufferedReader reader = new BufferedReader(new InputStreamReader(in)); 036 String version = InvokerHelper.getVersion(); 037 out.println("Lets get Groovy!"); 038 out.println("================"); 039 out.println("Version: " + version + " JVM: " + System.getProperty("java.vm.version")); 040 out.println("Hit carriage return twice to execute a command"); 041 out.println("The command 'quit' will terminate the shell"); 042 int counter = 1; 043 while (true) { 044 StringBuffer buffer = new StringBuffer(); 045 while (true) { 046 out.print("groovy> "); 047 String line; 048 try { 049 line = reader.readLine(); 050 } catch (IOException e) { 051 out.println("Caught: " + e); 052 e.printStackTrace(); 053 return -1; 054 } 055 if (line != null) { 056 buffer.append(line); 057 buffer.append('\n'); 058 } 059 if (line == null || line.trim().length() == 0) { 060 break; 061 } 062 } 063 String command = buffer.toString().trim(); 064 if (command == null || command.equals("quit")) { 065 break; 066 } 067 try { 068 Object answer = shell.evaluate(command, "CommandLine" + counter++ + ".groovy"); 069 out.println(InvokerHelper.inspect(answer)); 070 } catch (Exception e) { 071 out.println("Caught: " + e); 072 e.printStackTrace(); 073 } 074 } 075 return 0; 076 } 077 }