Expand tutorial.

js/rhino/examples/RunScript3.java

@@ -6,7 +6,7 @@
  * the License at http://www.mozilla.org/NPL/
  *
  * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
+ * 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.
  *
@@ -35,37 +35,46 @@
 import org.mozilla.javascript.*;
 
 /**
- * RunScript3: Execute scripts in an environment that includes the
- *             example Counter class.
+ * RunScript3: Example of using JavaScript objects
+ * 
+ * Collects its arguments from the command line, executes the 
+ * script, and then ...
  * 
  * @author Norris Boyd
  */
 public class RunScript3 {
     public static void main(String args[]) 
-        throws Exception 
+        throws JavaScriptException 
     {
         Context cx = Context.enter();
         Scriptable scope = cx.initStandardObjects(null);
-
-        // Use the Counter class to define a Counter constructor
-        // and prototype in JavaScript.
-        ScriptableObject.defineClass(scope, Counter.class);
-
-        // Create an instance of Counter and assign it to
-        // the top-level variable "myCounter". This is
-        // equivalent to the JavaScript code 
-        //    myCounter = new Counter(7);
-        Object[] arg = { new Integer(7) };
-        Scriptable myCounter = cx.newObject(scope, "Counter", arg);
-        scope.put("myCounter", scope, myCounter);
         
+        // Collect the arguments into a single string.
         String s = "";
         for (int i=0; i < args.length; i++)
             s += args[i];
-        Object result = cx.evaluateString(scope, s, "<cmd>", 1, null);
-        System.err.println(cx.toString(result));
+        
+        // Now evaluate the string we've colected. We'll ignore the result.
+        cx.evaluateString(scope, s, "<cmd>", 1, null);
+
+        // Print the value of variable "x"
+        Object x = scope.get("x", scope);
+        if (x == Scriptable.NOT_FOUND)
+            System.out.println("x is not defined.");
+        else
+            System.out.println("x = " + Context.toString(x));
+
+        // Call function "f('my arg')" and print its result.
+        Object f = scope.get("f", scope);
+        if (!(f instanceof Function))
+            System.out.println("f is undefined or not a function.");
+        else {
+            Object functionArgs[] = { "my arg" };
+            Object result = ((Function) f).call(cx, scope, scope, functionArgs);
+            System.out.println("f('my args') = " + Context.toString(result));
+        }
+        
         Context.exit();
     }
-
 }
 

js/rhino/examples/RunScript4.java

@@ -0,0 +1,71 @@
+/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * The contents of this file are subject to the Netscape 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/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS
+ * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
+ * 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 Netscape are
+ * Copyright (C) 1999 Netscape Communications Corporation. All
+ * Rights Reserved.
+ *
+ * Contributor(s): 
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU Public License (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 NPL, indicate your decision by
+ * deleting the provisions above and replace 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 NPL or the GPL.
+ */
+
+import org.mozilla.javascript.*;
+
+/**
+ * RunScript4: Execute scripts in an environment that includes the
+ *             example Counter class.
+ * 
+ * @author Norris Boyd
+ */
+public class RunScript4 {
+    public static void main(String args[]) 
+        throws Exception 
+    {
+        Context cx = Context.enter();
+        Scriptable scope = cx.initStandardObjects(null);
+
+        // Use the Counter class to define a Counter constructor
+        // and prototype in JavaScript.
+        ScriptableObject.defineClass(scope, Counter.class);
+
+        // Create an instance of Counter and assign it to
+        // the top-level variable "myCounter". This is
+        // equivalent to the JavaScript code 
+        //    myCounter = new Counter(7);
+        Object[] arg = { new Integer(7) };
+        Scriptable myCounter = cx.newObject(scope, "Counter", arg);
+        scope.put("myCounter", scope, myCounter);
+        
+        String s = "";
+        for (int i=0; i < args.length; i++)
+            s += args[i];
+        Object result = cx.evaluateString(scope, s, "<cmd>", 1, null);
+        System.err.println(cx.toString(result));
+        Context.exit();
+    }
+
+}
+