org.apache.xbean.command.GroovySh Maven / Gradle / Ivy
/**
* 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.xbean.command;
import groovy.lang.GroovyShell;
import org.codehaus.groovy.runtime.InvokerHelper;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
public class GroovySh implements Command {
public static void register() {
CommandRegistry.register("groovysh", GroovySh.class);
}
public int main(String[] args, InputStream in, PrintStream out) {
GroovyShell shell = new GroovyShell();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String version = InvokerHelper.getVersion();
out.println("Lets get Groovy!");
out.println("================");
out.println("Version: " + version + " JVM: " + System.getProperty("java.vm.version"));
out.println("Hit carriage return twice to execute a command");
out.println("The command 'quit' will terminate the shell");
int counter = 1;
while (true) {
StringBuffer buffer = new StringBuffer();
while (true) {
out.print("groovy> ");
String line;
try {
line = reader.readLine();
} catch (IOException e) {
out.println("Caught: " + e);
e.printStackTrace();
return -1;
}
if (line != null) {
buffer.append(line);
buffer.append('\n');
}
if (line == null || line.trim().length() == 0) {
break;
}
}
String command = buffer.toString().trim();
if (command == null || command.equals("quit")) {
break;
}
try {
Object answer = shell.evaluate(command, "CommandLine" + counter++ + ".groovy");
out.println(InvokerHelper.inspect(answer));
} catch (Exception e) {
out.println("Caught: " + e);
e.printStackTrace();
}
}
return 0;
}
}