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Diffstat (limited to 'infrastructure/rhino1_7R1/examples/Shell.java')
| -rw-r--r-- | infrastructure/rhino1_7R1/examples/Shell.java | 345 |
1 files changed, 0 insertions, 345 deletions
diff --git a/infrastructure/rhino1_7R1/examples/Shell.java b/infrastructure/rhino1_7R1/examples/Shell.java deleted file mode 100644 index 6316c6f..0000000 --- a/infrastructure/rhino1_7R1/examples/Shell.java +++ /dev/null @@ -1,345 +0,0 @@ -/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- - * - * ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (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.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * The Original Code is Rhino code, released - * May 6, 1998. - * - * The Initial Developer of the Original Code is - * Netscape Communications Corporation. - * Portions created by the Initial Developer are Copyright (C) 1997-1999 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * - * Alternatively, the contents of this file may be used under the terms of - * the GNU General Public License Version 2 or later (the "GPL"), in which - * case the provisions of the GPL are applicable instead of those above. If - * you wish to allow use of your version of this file only under the terms of - * the GPL and not to allow others to use your version of this file under the - * MPL, indicate your decision by deleting the provisions above and replacing - * them with the notice and other provisions required by the GPL. If you do - * not delete the provisions above, a recipient may use your version of this - * file under either the MPL or the GPL. - * - * ***** END LICENSE BLOCK ***** */ - -import org.mozilla.javascript.*; -import java.io.*; - -/** - * The shell program. - * - * Can execute scripts interactively or in batch mode at the command line. - * An example of controlling the JavaScript engine. - * - * @author Norris Boyd - */ -public class Shell extends ScriptableObject -{ - public String getClassName() - { - return "global"; - } - - /** - * Main entry point. - * - * Process arguments as would a normal Java program. Also - * create a new Context and associate it with the current thread. - * Then set up the execution environment and begin to - * execute scripts. - */ - public static void main(String args[]) { - // Associate a new Context with this thread - Context cx = Context.enter(); - try { - // Initialize the standard objects (Object, Function, etc.) - // This must be done before scripts can be executed. - Shell shell = new Shell(); - cx.initStandardObjects(shell); - - // Define some global functions particular to the shell. Note - // that these functions are not part of ECMA. - String[] names = { "print", "quit", "version", "load", "help" }; - shell.defineFunctionProperties(names, Shell.class, - ScriptableObject.DONTENUM); - - args = processOptions(cx, args); - - // Set up "arguments" in the global scope to contain the command - // line arguments after the name of the script to execute - Object[] array; - if (args.length == 0) { - array = new Object[0]; - } else { - int length = args.length - 1; - array = new Object[length]; - System.arraycopy(args, 1, array, 0, length); - } - Scriptable argsObj = cx.newArray(shell, array); - shell.defineProperty("arguments", argsObj, - ScriptableObject.DONTENUM); - - shell.processSource(cx, args.length == 0 ? null : args[0]); - } finally { - Context.exit(); - } - } - - /** - * Parse arguments. - */ - public static String[] processOptions(Context cx, String args[]) { - for (int i=0; i < args.length; i++) { - String arg = args[i]; - if (!arg.startsWith("-")) { - String[] result = new String[args.length - i]; - for (int j=i; j < args.length; j++) - result[j-i] = args[j]; - return result; - } - if (arg.equals("-version")) { - if (++i == args.length) - usage(arg); - double d = Context.toNumber(args[i]); - if (d != d) - usage(arg); - cx.setLanguageVersion((int) d); - continue; - } - usage(arg); - } - return new String[0]; - } - - /** - * Print a usage message. - */ - private static void usage(String s) { - p("Didn't understand \"" + s + "\"."); - p("Valid arguments are:"); - p("-version 100|110|120|130|140|150|160|170"); - System.exit(1); - } - - /** - * Print a help message. - * - * This method is defined as a JavaScript function. - */ - public void help() { - p(""); - p("Command Description"); - p("======= ==========="); - p("help() Display usage and help messages. "); - p("defineClass(className) Define an extension using the Java class"); - p(" named with the string argument. "); - p(" Uses ScriptableObject.defineClass(). "); - p("load(['foo.js', ...]) Load JavaScript source files named by "); - p(" string arguments. "); - p("loadClass(className) Load a class named by a string argument."); - p(" The class must be a script compiled to a"); - p(" class file. "); - p("print([expr ...]) Evaluate and print expressions. "); - p("quit() Quit the shell. "); - p("version([number]) Get or set the JavaScript version number."); - p(""); - } - - /** - * Print the string values of its arguments. - * - * This method is defined as a JavaScript function. - * Note that its arguments are of the "varargs" form, which - * allows it to handle an arbitrary number of arguments - * supplied to the JavaScript function. - * - */ - public static void print(Context cx, Scriptable thisObj, - Object[] args, Function funObj) - { - for (int i=0; i < args.length; i++) { - if (i > 0) - System.out.print(" "); - - // Convert the arbitrary JavaScript value into a string form. - String s = Context.toString(args[i]); - - System.out.print(s); - } - System.out.println(); - } - - /** - * Quit the shell. - * - * This only affects the interactive mode. - * - * This method is defined as a JavaScript function. - */ - public void quit() - { - quitting = true; - } - - /** - * Get and set the language version. - * - * This method is defined as a JavaScript function. - */ - public static double version(Context cx, Scriptable thisObj, - Object[] args, Function funObj) - { - double result = cx.getLanguageVersion(); - if (args.length > 0) { - double d = Context.toNumber(args[0]); - cx.setLanguageVersion((int) d); - } - return result; - } - - /** - * Load and execute a set of JavaScript source files. - * - * This method is defined as a JavaScript function. - * - */ - public static void load(Context cx, Scriptable thisObj, - Object[] args, Function funObj) - { - Shell shell = (Shell)getTopLevelScope(thisObj); - for (int i = 0; i < args.length; i++) { - shell.processSource(cx, Context.toString(args[i])); - } - } - - - /** - * Evaluate JavaScript source. - * - * @param cx the current context - * @param filename the name of the file to compile, or null - * for interactive mode. - */ - private void processSource(Context cx, String filename) - { - if (filename == null) { - BufferedReader in = new BufferedReader - (new InputStreamReader(System.in)); - String sourceName = "<stdin>"; - int lineno = 1; - boolean hitEOF = false; - do { - int startline = lineno; - System.err.print("js> "); - System.err.flush(); - try { - String source = ""; - // Collect lines of source to compile. - while(true) { - String newline; - newline = in.readLine(); - if (newline == null) { - hitEOF = true; - break; - } - source = source + newline + "\n"; - lineno++; - // Continue collecting as long as more lines - // are needed to complete the current - // statement. stringIsCompilableUnit is also - // true if the source statement will result in - // any error other than one that might be - // resolved by appending more source. - if (cx.stringIsCompilableUnit(source)) - break; - } - Object result = cx.evaluateString(this, source, - sourceName, startline, - null); - if (result != Context.getUndefinedValue()) { - System.err.println(Context.toString(result)); - } - } - catch (WrappedException we) { - // Some form of exception was caught by JavaScript and - // propagated up. - System.err.println(we.getWrappedException().toString()); - we.printStackTrace(); - } - catch (EvaluatorException ee) { - // Some form of JavaScript error. - System.err.println("js: " + ee.getMessage()); - } - catch (JavaScriptException jse) { - // Some form of JavaScript error. - System.err.println("js: " + jse.getMessage()); - } - catch (IOException ioe) { - System.err.println(ioe.toString()); - } - if (quitting) { - // The user executed the quit() function. - break; - } - } while (!hitEOF); - System.err.println(); - } else { - FileReader in = null; - try { - in = new FileReader(filename); - } - catch (FileNotFoundException ex) { - Context.reportError("Couldn't open file \"" + filename + "\"."); - return; - } - - try { - // Here we evalute the entire contents of the file as - // a script. Text is printed only if the print() function - // is called. - cx.evaluateReader(this, in, filename, 1, null); - } - catch (WrappedException we) { - System.err.println(we.getWrappedException().toString()); - we.printStackTrace(); - } - catch (EvaluatorException ee) { - System.err.println("js: " + ee.getMessage()); - } - catch (JavaScriptException jse) { - System.err.println("js: " + jse.getMessage()); - } - catch (IOException ioe) { - System.err.println(ioe.toString()); - } - finally { - try { - in.close(); - } - catch (IOException ioe) { - System.err.println(ioe.toString()); - } - } - } - } - - private static void p(String s) { - System.out.println(s); - } - - private boolean quitting; -} - |