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+/* -*- 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, 1999.
+ *
+ * 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):
+ * Norris Boyd
+ * Igor Bukanov
+ * Bob Jervis
+ * Roger Lawrence
+ * Mike McCabe
+ *
+ * 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 ***** */
+
+package org.mozilla.javascript;
+
+import org.mozilla.javascript.debug.DebuggableScript;
+
+/**
+ * This class implements the Function native object.
+ * See ECMA 15.3.
+ * @author Norris Boyd
+ */
+public abstract class NativeFunction extends BaseFunction
+{
+
+ public final void initScriptFunction(Context cx, Scriptable scope)
+ {
+ ScriptRuntime.setFunctionProtoAndParent(this, scope);
+ }
+
+ /**
+ * @param indent How much to indent the decompiled result
+ *
+ * @param flags Flags specifying format of decompilation output
+ */
+ final String decompile(int indent, int flags)
+ {
+ String encodedSource = getEncodedSource();
+ if (encodedSource == null) {
+ return super.decompile(indent, flags);
+ } else {
+ UintMap properties = new UintMap(1);
+ properties.put(Decompiler.INITIAL_INDENT_PROP, indent);
+ return Decompiler.decompile(encodedSource, flags, properties);
+ }
+ }
+
+ public int getLength()
+ {
+ int paramCount = getParamCount();
+ if (getLanguageVersion() != Context.VERSION_1_2) {
+ return paramCount;
+ }
+ Context cx = Context.getContext();
+ NativeCall activation = ScriptRuntime.findFunctionActivation(cx, this);
+ if (activation == null) {
+ return paramCount;
+ }
+ return activation.originalArgs.length;
+ }
+
+ public int getArity()
+ {
+ return getParamCount();
+ }
+
+ /**
+ * @deprecated Use {@link BaseFunction#getFunctionName()} instead.
+ * For backwards compatibility keep an old method name used by
+ * Batik and possibly others.
+ */
+ public String jsGet_name()
+ {
+ return getFunctionName();
+ }
+
+ /**
+ * Get encoded source string.
+ */
+ public String getEncodedSource()
+ {
+ return null;
+ }
+
+ public DebuggableScript getDebuggableView()
+ {
+ return null;
+ }
+
+ /**
+ * Resume execution of a suspended generator.
+ * @param cx The current context
+ * @param scope Scope for the parent generator function
+ * @param operation The resumption operation (next, send, etc.. )
+ * @param state The generator state (has locals, stack, etc.)
+ * @param value The return value of yield (if required).
+ * @return The next yielded value (if any)
+ */
+ public Object resumeGenerator(Context cx, Scriptable scope,
+ int operation, Object state, Object value)
+ {
+ throw new EvaluatorException("resumeGenerator() not implemented");
+ }
+
+
+ protected abstract int getLanguageVersion();
+
+ /**
+ * Get number of declared parameters. It should be 0 for scripts.
+ */
+ protected abstract int getParamCount();
+
+ /**
+ * Get number of declared parameters and variables defined through var
+ * statements.
+ */
+ protected abstract int getParamAndVarCount();
+
+ /**
+ * Get parameter or variable name.
+ * If <tt>index < {@link #getParamCount()}</tt>, then return the name of the
+ * corresponding parameter. Otherwise return the name of variable.
+ */
+ protected abstract String getParamOrVarName(int index);
+
+ /**
+ * Get parameter or variable const-ness.
+ * If <tt>index < {@link #getParamCount()}</tt>, then return the const-ness
+ * of the corresponding parameter. Otherwise return whether the variable is
+ * const.
+ */
+ protected boolean getParamOrVarConst(int index)
+ {
+ // By default return false to preserve compatibility with existing
+ // classes subclassing this class, which are mostly generated by jsc
+ // from earlier Rhino versions. See Bugzilla #396117.
+ return false;
+ }
+}
+