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Diffstat (limited to 'infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaClass.java')
| -rw-r--r-- | infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaClass.java | 320 |
1 files changed, 0 insertions, 320 deletions
diff --git a/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaClass.java b/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaClass.java deleted file mode 100644 index ab8af5c..0000000 --- a/infrastructure/rhino1_7R1/src/org/mozilla/javascript/NativeJavaClass.java +++ /dev/null @@ -1,320 +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, 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 - * Frank Mitchell - * Mike Shaver - * Kurt Westerfeld - * Kemal Bayram - * Ulrike Mueller <umueller@demandware.com> - * - * 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 java.lang.reflect.*; -import java.util.Hashtable; - -/** - * This class reflects Java classes into the JavaScript environment, mainly - * for constructors and static members. We lazily reflect properties, - * and currently do not guarantee that a single j.l.Class is only - * reflected once into the JS environment, although we should. - * The only known case where multiple reflections - * are possible occurs when a j.l.Class is wrapped as part of a - * method return or property access, rather than by walking the - * Packages/java tree. - * - * @author Mike Shaver - * @see NativeJavaArray - * @see NativeJavaObject - * @see NativeJavaPackage - */ - -public class NativeJavaClass extends NativeJavaObject implements Function -{ - static final long serialVersionUID = -6460763940409461664L; - - // Special property for getting the underlying Java class object. - static final String javaClassPropertyName = "__javaObject__"; - - public NativeJavaClass() { - } - - public NativeJavaClass(Scriptable scope, Class cl) { - this.parent = scope; - this.javaObject = cl; - initMembers(); - } - - protected void initMembers() { - Class cl = (Class)javaObject; - members = JavaMembers.lookupClass(parent, cl, cl, false); - staticFieldAndMethods - = members.getFieldAndMethodsObjects(this, cl, true); - } - - public String getClassName() { - return "JavaClass"; - } - - public boolean has(String name, Scriptable start) { - return members.has(name, true) || javaClassPropertyName.equals(name); - } - - public Object get(String name, Scriptable start) { - // When used as a constructor, ScriptRuntime.newObject() asks - // for our prototype to create an object of the correct type. - // We don't really care what the object is, since we're returning - // one constructed out of whole cloth, so we return null. - if (name.equals("prototype")) - return null; - - if (staticFieldAndMethods != null) { - Object result = staticFieldAndMethods.get(name); - if (result != null) - return result; - } - - if (members.has(name, true)) { - return members.get(this, name, javaObject, true); - } - - if (javaClassPropertyName.equals(name)) { - Context cx = Context.getContext(); - Scriptable scope = ScriptableObject.getTopLevelScope(start); - return cx.getWrapFactory().wrap(cx, scope, javaObject, - ScriptRuntime.ClassClass); - } - - // experimental: look for nested classes by appending $name to - // current class' name. - Class nestedClass = findNestedClass(getClassObject(), name); - if (nestedClass != null) { - NativeJavaClass nestedValue = new NativeJavaClass - (ScriptableObject.getTopLevelScope(this), nestedClass); - nestedValue.setParentScope(this); - return nestedValue; - } - - throw members.reportMemberNotFound(name); - } - - public void put(String name, Scriptable start, Object value) { - members.put(this, name, javaObject, value, true); - } - - public Object[] getIds() { - return members.getIds(true); - } - - public Class getClassObject() { - return (Class) super.unwrap(); - } - - public Object getDefaultValue(Class hint) { - if (hint == null || hint == ScriptRuntime.StringClass) - return this.toString(); - if (hint == ScriptRuntime.BooleanClass) - return Boolean.TRUE; - if (hint == ScriptRuntime.NumberClass) - return ScriptRuntime.NaNobj; - return this; - } - - public Object call(Context cx, Scriptable scope, Scriptable thisObj, - Object[] args) - { - // If it looks like a "cast" of an object to this class type, - // walk the prototype chain to see if there's a wrapper of a - // object that's an instanceof this class. - if (args.length == 1 && args[0] instanceof Scriptable) { - Class c = getClassObject(); - Scriptable p = (Scriptable) args[0]; - do { - if (p instanceof Wrapper) { - Object o = ((Wrapper) p).unwrap(); - if (c.isInstance(o)) - return p; - } - p = p.getPrototype(); - } while (p != null); - } - return construct(cx, scope, args); - } - - public Scriptable construct(Context cx, Scriptable scope, Object[] args) - { - Class classObject = getClassObject(); - int modifiers = classObject.getModifiers(); - if (! (Modifier.isInterface(modifiers) || - Modifier.isAbstract(modifiers))) - { - MemberBox[] ctors = members.ctors; - int index = NativeJavaMethod.findFunction(cx, ctors, args); - if (index < 0) { - String sig = NativeJavaMethod.scriptSignature(args); - throw Context.reportRuntimeError2( - "msg.no.java.ctor", classObject.getName(), sig); - } - - // Found the constructor, so try invoking it. - return constructSpecific(cx, scope, args, ctors[index]); - } else { - Scriptable topLevel = ScriptableObject.getTopLevelScope(this); - String msg = ""; - try { - // trying to construct an interface; use JavaAdapter to - // construct a new class on the fly that implements this - // interface. - Object v = topLevel.get("JavaAdapter", topLevel); - if (v != NOT_FOUND) { - Function f = (Function) v; - Object[] adapterArgs = { this, args[0] }; - return f.construct(cx, topLevel,adapterArgs); - } - } catch (Exception ex) { - // fall through to error - String m = ex.getMessage(); - if (m != null) - msg = m; - } - throw Context.reportRuntimeError2( - "msg.cant.instantiate", msg, classObject.getName()); - } - } - - static Scriptable constructSpecific(Context cx, Scriptable scope, - Object[] args, MemberBox ctor) - { - Scriptable topLevel = ScriptableObject.getTopLevelScope(scope); - Class[] argTypes = ctor.argTypes; - - if (ctor.vararg) { - // marshall the explicit parameter - Object[] newArgs = new Object[argTypes.length]; - for (int i = 0; i < argTypes.length-1; i++) { - newArgs[i] = Context.jsToJava(args[i], argTypes[i]); - } - - Object varArgs; - - // Handle special situation where a single variable parameter - // is given and it is a Java or ECMA array. - if (args.length == argTypes.length && - (args[args.length-1] == null || - args[args.length-1] instanceof NativeArray || - args[args.length-1] instanceof NativeJavaArray)) - { - // convert the ECMA array into a native array - varArgs = Context.jsToJava(args[args.length-1], - argTypes[argTypes.length - 1]); - } else { - // marshall the variable parameter - Class componentType = argTypes[argTypes.length - 1]. - getComponentType(); - varArgs = Array.newInstance(componentType, - args.length - argTypes.length + 1); - for (int i=0; i < Array.getLength(varArgs); i++) { - Object value = Context.jsToJava(args[argTypes.length-1 + i], - componentType); - Array.set(varArgs, i, value); - } - } - - // add varargs - newArgs[argTypes.length-1] = varArgs; - // replace the original args with the new one - args = newArgs; - } else { - Object[] origArgs = args; - for (int i = 0; i < args.length; i++) { - Object arg = args[i]; - Object x = Context.jsToJava(arg, argTypes[i]); - if (x != arg) { - if (args == origArgs) { - args = origArgs.clone(); - } - args[i] = x; - } - } - } - - Object instance = ctor.newInstance(args); - // we need to force this to be wrapped, because construct _has_ - // to return a scriptable - return cx.getWrapFactory().wrapNewObject(cx, topLevel, instance); - } - - public String toString() { - return "[JavaClass " + getClassObject().getName() + "]"; - } - - /** - * Determines if prototype is a wrapped Java object and performs - * a Java "instanceof". - * Exception: if value is an instance of NativeJavaClass, it isn't - * considered an instance of the Java class; this forestalls any - * name conflicts between java.lang.Class's methods and the - * static methods exposed by a JavaNativeClass. - */ - public boolean hasInstance(Scriptable value) { - - if (value instanceof Wrapper && - !(value instanceof NativeJavaClass)) { - Object instance = ((Wrapper)value).unwrap(); - - return getClassObject().isInstance(instance); - } - - // value wasn't something we understand - return false; - } - - private static Class findNestedClass(Class parentClass, String name) { - String nestedClassName = parentClass.getName() + '$' + name; - ClassLoader loader = parentClass.getClassLoader(); - if (loader == null) { - // ALERT: if loader is null, nested class should be loaded - // via system class loader which can be different from the - // loader that brought Rhino classes that Class.forName() would - // use, but ClassLoader.getSystemClassLoader() is Java 2 only - return Kit.classOrNull(nestedClassName); - } else { - return Kit.classOrNull(loader, nestedClassName); - } - } - - private Hashtable staticFieldAndMethods; -} |