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 */ 017package org.apache.xbean.command; 018 019import groovy.lang.GroovyShell; 020import groovy.lang.GroovySystem; 021import org.codehaus.groovy.runtime.InvokerHelper; 022 023import java.io.BufferedReader; 024import java.io.IOException; 025import java.io.InputStream; 026import java.io.InputStreamReader; 027import java.io.PrintStream; 028 029public class GroovySh implements Command { 030 public static void register() { 031 CommandRegistry.register("groovysh", GroovySh.class); 032 } 033 034 public int main(String[] args, InputStream in, PrintStream out) { 035 GroovyShell shell = new GroovyShell(); 036 BufferedReader reader = new BufferedReader(new InputStreamReader(in)); 037 String version = GroovySystem.getVersion(); 038 out.println("Lets get Groovy!"); 039 out.println("================"); 040 out.println("Version: " + version + " JVM: " + System.getProperty("java.vm.version")); 041 out.println("Hit carriage return twice to execute a command"); 042 out.println("The command 'quit' will terminate the shell"); 043 int counter = 1; 044 while (true) { 045 StringBuffer buffer = new StringBuffer(); 046 while (true) { 047 out.print("groovy> "); 048 String line; 049 try { 050 line = reader.readLine(); 051 } catch (IOException e) { 052 out.println("Caught: " + e); 053 e.printStackTrace(); 054 return -1; 055 } 056 if (line != null) { 057 buffer.append(line); 058 buffer.append('\n'); 059 } 060 if (line == null || line.trim().length() == 0) { 061 break; 062 } 063 } 064 String command = buffer.toString().trim(); 065 if (command == null || command.equals("quit")) { 066 break; 067 } 068 try { 069 Object answer = shell.evaluate(command, "CommandLine" + counter++ + ".groovy"); 070 out.println(InvokerHelper.inspect(answer)); 071 } catch (Exception e) { 072 out.println("Caught: " + e); 073 e.printStackTrace(); 074 } 075 } 076 return 0; 077 } 078}