| /* |
| * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nashorn.internal.tools.nasgen; |
| |
| import static jdk.internal.org.objectweb.asm.Opcodes.ACC_FINAL; |
| import static jdk.internal.org.objectweb.asm.Opcodes.ACC_PUBLIC; |
| import static jdk.internal.org.objectweb.asm.Opcodes.ACC_SUPER; |
| import static jdk.internal.org.objectweb.asm.Opcodes.V1_7; |
| import static jdk.nashorn.internal.tools.nasgen.StringConstants.DEFAULT_INIT_DESC; |
| import static jdk.nashorn.internal.tools.nasgen.StringConstants.INIT; |
| import static jdk.nashorn.internal.tools.nasgen.StringConstants.OBJECT_DESC; |
| import static jdk.nashorn.internal.tools.nasgen.StringConstants.PROPERTYMAP_DESC; |
| import static jdk.nashorn.internal.tools.nasgen.StringConstants.PROPERTYMAP_FIELD_NAME; |
| import static jdk.nashorn.internal.tools.nasgen.StringConstants.PROTOTYPEOBJECT_TYPE; |
| import static jdk.nashorn.internal.tools.nasgen.StringConstants.PROTOTYPE_SUFFIX; |
| import static jdk.nashorn.internal.tools.nasgen.StringConstants.SCRIPTOBJECT_INIT_DESC; |
| |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| |
| /** |
| * This class generates prototype class for a @ScriptClass annotated class. |
| * |
| */ |
| public class PrototypeGenerator extends ClassGenerator { |
| private final ScriptClassInfo scriptClassInfo; |
| private final String className; |
| private final int memberCount; |
| |
| PrototypeGenerator(final ScriptClassInfo sci) { |
| this.scriptClassInfo = sci; |
| this.className = scriptClassInfo.getPrototypeClassName(); |
| this.memberCount = scriptClassInfo.getPrototypeMemberCount(); |
| } |
| |
| byte[] getClassBytes() { |
| // new class extending from ScriptObject |
| cw.visit(V1_7, ACC_FINAL | ACC_SUPER, className, null, PROTOTYPEOBJECT_TYPE, null); |
| if (memberCount > 0) { |
| // add fields |
| emitFields(); |
| // add <clinit> |
| emitStaticInitializer(); |
| } |
| |
| // add <init> |
| emitConstructor(); |
| |
| // add getClassName() |
| emitGetClassName(scriptClassInfo.getName()); |
| |
| cw.visitEnd(); |
| return cw.toByteArray(); |
| } |
| |
| // --Internals only below this point |
| private void emitFields() { |
| // introduce "Function" type instance fields for each |
| // prototype @Function in script class info |
| for (MemberInfo memInfo : scriptClassInfo.getMembers()) { |
| if (memInfo.isPrototypeFunction()) { |
| addFunctionField(memInfo.getJavaName()); |
| memInfo = (MemberInfo)memInfo.clone(); |
| memInfo.setJavaDesc(OBJECT_DESC); |
| addGetter(className, memInfo); |
| addSetter(className, memInfo); |
| } else if (memInfo.isPrototypeProperty()) { |
| if (memInfo.isStaticFinal()) { |
| addGetter(scriptClassInfo.getJavaName(), memInfo); |
| } else { |
| addField(memInfo.getJavaName(), memInfo.getJavaDesc()); |
| memInfo = (MemberInfo)memInfo.clone(); |
| memInfo.setJavaAccess(ACC_PUBLIC); |
| addGetter(className, memInfo); |
| addSetter(className, memInfo); |
| } |
| } |
| } |
| |
| addMapField(); |
| } |
| |
| private void emitStaticInitializer() { |
| final MethodGenerator mi = makeStaticInitializer(); |
| emitStaticInitPrefix(mi, className, memberCount); |
| for (final MemberInfo memInfo : scriptClassInfo.getMembers()) { |
| if (memInfo.isPrototypeFunction() || memInfo.isPrototypeProperty()) { |
| linkerAddGetterSetter(mi, className, memInfo); |
| } else if (memInfo.isPrototypeGetter()) { |
| final MemberInfo setter = scriptClassInfo.findSetter(memInfo); |
| linkerAddGetterSetter(mi, scriptClassInfo.getJavaName(), memInfo, setter); |
| } |
| } |
| emitStaticInitSuffix(mi, className); |
| } |
| |
| private void emitConstructor() { |
| final MethodGenerator mi = makeConstructor(); |
| mi.visitCode(); |
| mi.loadThis(); |
| if (memberCount > 0) { |
| // call "super(map$)" |
| mi.getStatic(className, PROPERTYMAP_FIELD_NAME, PROPERTYMAP_DESC); |
| mi.invokeSpecial(PROTOTYPEOBJECT_TYPE, INIT, SCRIPTOBJECT_INIT_DESC); |
| // initialize Function type fields |
| initFunctionFields(mi); |
| } else { |
| // call "super()" |
| mi.invokeSpecial(PROTOTYPEOBJECT_TYPE, INIT, DEFAULT_INIT_DESC); |
| } |
| mi.returnVoid(); |
| mi.computeMaxs(); |
| mi.visitEnd(); |
| } |
| |
| private void initFunctionFields(final MethodGenerator mi) { |
| for (final MemberInfo memInfo : scriptClassInfo.getMembers()) { |
| if (! memInfo.isPrototypeFunction()) { |
| continue; |
| } |
| mi.loadThis(); |
| newFunction(mi, scriptClassInfo.getJavaName(), memInfo, scriptClassInfo.findSpecializations(memInfo.getJavaName())); |
| mi.putField(className, memInfo.getJavaName(), OBJECT_DESC); |
| } |
| } |
| |
| /** |
| * External entry point for PrototypeGenerator if called from the command line |
| * |
| * @param args arguments, takes 1 argument which is the class to process |
| * @throws IOException if class cannot be read |
| */ |
| public static void main(final String[] args) throws IOException { |
| if (args.length != 1) { |
| System.err.println("Usage: " + PrototypeGenerator.class.getName() + " <class>"); |
| System.exit(1); |
| } |
| |
| final String className = args[0].replace('.', '/'); |
| final ScriptClassInfo sci = getScriptClassInfo(className + ".class"); |
| if (sci == null) { |
| System.err.println("No @ScriptClass in " + className); |
| System.exit(2); |
| throw new AssertionError(); //guard against warning that sci is null below |
| } |
| try { |
| sci.verify(); |
| } catch (final Exception e) { |
| System.err.println(e.getMessage()); |
| System.exit(3); |
| } |
| final PrototypeGenerator gen = new PrototypeGenerator(sci); |
| try (FileOutputStream fos = new FileOutputStream(className + PROTOTYPE_SUFFIX + ".class")) { |
| fos.write(gen.getClassBytes()); |
| } |
| } |
| } |