| /* |
| * 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.codegen; |
| |
| import static jdk.nashorn.internal.codegen.CompilerConstants.SCOPE; |
| |
| import java.util.List; |
| import jdk.nashorn.internal.codegen.types.Type; |
| import jdk.nashorn.internal.runtime.PropertyMap; |
| import jdk.nashorn.internal.runtime.ScriptObject; |
| |
| /** |
| * Base class for object creation code generation. |
| * @param <T> value type |
| */ |
| public abstract class ObjectCreator<T> { |
| |
| /** List of keys & symbols to initiate in this ObjectCreator */ |
| final List<MapTuple<T>> tuples; |
| |
| /** Code generator */ |
| final CodeGenerator codegen; |
| |
| /** Property map */ |
| protected PropertyMap propertyMap; |
| |
| private final boolean isScope; |
| private final boolean hasArguments; |
| |
| /** |
| * Constructor |
| * |
| * @param codegen the code generator |
| * @param tuples key,symbol,value (optional) tuples |
| * @param isScope is this object scope |
| * @param hasArguments does the created object have an "arguments" property |
| */ |
| ObjectCreator(final CodeGenerator codegen, final List<MapTuple<T>> tuples, final boolean isScope, final boolean hasArguments) { |
| this.codegen = codegen; |
| this.tuples = tuples; |
| this.isScope = isScope; |
| this.hasArguments = hasArguments; |
| } |
| |
| /** |
| * Generate code for making the object. |
| * @param method Script method. |
| */ |
| protected abstract void makeObject(final MethodEmitter method); |
| |
| /** |
| * Construct the property map appropriate for the object. |
| * @return the newly created property map |
| */ |
| protected abstract PropertyMap makeMap(); |
| |
| /** |
| * Create a new MapCreator |
| * @param clazz type of MapCreator |
| * @return map creator instantiated by type |
| */ |
| protected MapCreator<?> newMapCreator(final Class<? extends ScriptObject> clazz) { |
| return new MapCreator<>(clazz, tuples); |
| } |
| |
| /** |
| * Loads the scope on the stack through the passed method emitter. |
| * @param method the method emitter to use |
| */ |
| protected void loadScope(final MethodEmitter method) { |
| method.loadCompilerConstant(SCOPE); |
| } |
| |
| /** |
| * Emit the correct map for the object. |
| * @param method method emitter |
| * @return the method emitter |
| */ |
| protected MethodEmitter loadMap(final MethodEmitter method) { |
| codegen.loadConstant(propertyMap); |
| return method; |
| } |
| |
| PropertyMap getMap() { |
| return propertyMap; |
| } |
| |
| /** |
| * Is this a scope object |
| * @return true if scope |
| */ |
| protected boolean isScope() { |
| return isScope; |
| } |
| |
| /** |
| * Does the created object have an "arguments" property |
| * @return true if has an "arguments" property |
| */ |
| protected boolean hasArguments() { |
| return hasArguments; |
| } |
| |
| /** |
| * Technique for loading an initial value. Defined by anonymous subclasses in code gen. |
| * |
| * @param value Value to load. |
| * @param type the type of the value to load |
| */ |
| protected abstract void loadValue(T value, Type type); |
| |
| MethodEmitter loadTuple(final MethodEmitter method, final MapTuple<T> tuple, final boolean pack) { |
| loadValue(tuple.value, tuple.type); |
| if (pack && tuple.isPrimitive()) { |
| method.pack(); |
| } else { |
| method.convert(Type.OBJECT); |
| } |
| return method; |
| } |
| |
| MethodEmitter loadTuple(final MethodEmitter method, final MapTuple<T> tuple) { |
| return loadTuple(method, tuple, true); |
| } |
| |
| } |