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1   package org.codehaus.groovy.sandbox.ui;
2   
3   import java.io.InputStream;
4   import java.io.PrintStream;
5   
6   /***
7    * Factory to build a command line prompt.  Should build the most featureful
8    * prompt available.
9    * <p/>
10   * Currently readline prompt will be looked up dynamically, and defaults to
11   * normal System.in prompt.
12   */
13  public class PromptFactory
14  {
15      public static Prompt buildPrompt(InputStream in, PrintStream out, PrintStream err)
16      {
17          try
18          {
19              return (Prompt) Class.forName("org.codehaus.groovy.sandbox.ui.ReadlinePrompt").newInstance();
20          }
21          catch (ClassNotFoundException e)
22          {
23              return new JavaPrompt(in, out, err);
24          }
25          catch (Exception e)
26          {
27              e.printStackTrace();
28              return new JavaPrompt(in, out, err);
29          }
30      }
31  }