| /* |
| * Copyright 2008 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.dev.jjs.ast; |
| |
| import com.google.gwt.dev.jjs.SourceInfo; |
| import com.google.gwt.dev.jjs.SourceOrigin; |
| import com.google.gwt.dev.jjs.impl.GwtAstBuilder; |
| |
| import java.io.Serializable; |
| |
| /** |
| * Java class type reference expression. |
| */ |
| public class JClassType extends JDeclaredType { |
| |
| private static class ExternalSerializedForm implements Serializable { |
| private final String name; |
| |
| public ExternalSerializedForm(JClassType classType) { |
| name = classType.getName(); |
| } |
| |
| private Object readResolve() { |
| return new JClassType(name); |
| } |
| } |
| |
| public static JClassType NULL_CLASS = |
| new JClassType(SourceOrigin.UNKNOWN, "NullClass", true, true); |
| |
| private final boolean isAbstract; |
| private final boolean isFinal; |
| private boolean isJso; |
| private JClassType superClass; |
| |
| public JClassType(SourceInfo info, String name, boolean isAbstract, boolean isFinal) { |
| super(info, name); |
| this.isAbstract = isAbstract; |
| this.isFinal = isFinal; |
| this.isJso = name.equals(JProgram.JAVASCRIPTOBJECT); |
| } |
| |
| /** |
| * Construct a bare-bones deserialized external class. |
| */ |
| JClassType(String name) { |
| super(SourceOrigin.UNKNOWN, name); |
| isAbstract = false; |
| isFinal = false; |
| isJso = name.equals(JProgram.JAVASCRIPTOBJECT); |
| setExternal(true); |
| } |
| |
| @Override |
| public final JMethod getInitMethod() { |
| if (getMethods().size() <= GwtAstBuilder.INIT_METHOD_INDEX) { |
| return null; |
| } |
| JMethod init = this.getMethods().get(GwtAstBuilder.INIT_METHOD_INDEX); |
| |
| if (!init.getName().equals(GwtAstBuilder.INIT_NAME_METHOD_NAME)) { |
| // the init method was removed. |
| return null; |
| } |
| |
| return init; |
| } |
| |
| @Override |
| public final JClassType getSuperClass() { |
| return superClass; |
| } |
| |
| @Override |
| public boolean isAbstract() { |
| return isAbstract; |
| } |
| |
| @Override |
| public JEnumType isEnumOrSubclass() { |
| if (getSuperClass() != null) { |
| return getSuperClass().isEnumOrSubclass(); |
| } |
| return null; |
| } |
| |
| @Override |
| public boolean isFinal() { |
| return isFinal; |
| } |
| |
| @Override |
| public boolean isJsoType() { |
| return isJso; |
| } |
| |
| @Override |
| public boolean isJavaLangObject() { |
| return superClass == null; |
| } |
| |
| @Override |
| public boolean canBeReferencedExternally() { |
| return super.canBeReferencedExternally() || isJsoType() |
| || JProgram.isRepresentedAsNative(getName()) || isJavaLangObject(); |
| } |
| |
| @Override |
| public boolean isJsFunctionImplementation() { |
| for (JInterfaceType superInterface : getImplements()) { |
| if (superInterface.isJsFunction()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Sets this type's super class. |
| */ |
| public final void setSuperClass(JClassType superClass) { |
| assert this.superClass == null || this.superClass == superClass || this.superClass.isExternal(); |
| this.superClass = superClass; |
| |
| if (!name.equals(JProgram.JAVASCRIPTOBJECT) && superClass != null) { |
| this.isJso = superClass.isJso; |
| } |
| } |
| |
| @Override |
| public void traverse(JVisitor visitor, Context ctx) { |
| if (visitor.visit(this, ctx)) { |
| fields = visitor.acceptWithInsertRemoveImmutable(fields); |
| methods = visitor.acceptWithInsertRemoveImmutable(methods); |
| } |
| visitor.endVisit(this, ctx); |
| } |
| |
| @Override |
| protected Object writeReplace() { |
| if (isExternal()) { |
| return new ExternalSerializedForm(this); |
| } else if (this == NULL_CLASS) { |
| return ExternalSerializedNullClass.INSTANCE; |
| } else { |
| return this; |
| } |
| } |
| |
| private static class ExternalSerializedNullClass implements Serializable { |
| public static final ExternalSerializedNullClass INSTANCE = new ExternalSerializedNullClass(); |
| |
| private Object readResolve() { |
| return NULL_CLASS; |
| } |
| } |
| } |