| /* |
| * 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 java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Represents a GWT.create() call before deferred binding decisions are |
| * finalized. Replaced with the entry call for the appropriate rebind result in |
| * that permutation. |
| */ |
| public class JGwtCreate extends JExpression { |
| |
| public static JExpression createInstantiationExpression(SourceInfo info, |
| JClassType classType, JDeclaredType enclosingType) { |
| /* |
| * Find the appropriate (noArg) constructor. In our AST, constructors are |
| * instance methods that should be qualified with a new expression. |
| */ |
| JConstructor noArgCtor = null; |
| for (JMethod ctor : classType.getMethods()) { |
| if (ctor instanceof JConstructor) { |
| if (ctor.getParams().size() == 0) { |
| noArgCtor = (JConstructor) ctor; |
| break; |
| } |
| } |
| } |
| if (noArgCtor == null) { |
| return null; |
| } |
| // Call it, using a new expression as a qualifier |
| return new JNewInstance(info, noArgCtor, enclosingType); |
| } |
| |
| private static ArrayList<JExpression> createInstantiationExpressions( |
| SourceInfo info, List<JClassType> classTypes, JDeclaredType enclosingType) { |
| ArrayList<JExpression> exprs = new ArrayList<JExpression>(); |
| for (JClassType classType : classTypes) { |
| JExpression expr = createInstantiationExpression(info, classType, |
| enclosingType); |
| assert expr != null; |
| exprs.add(expr); |
| } |
| return exprs; |
| } |
| |
| private final ArrayList<JExpression> instantiationExpressions; |
| private final List<JClassType> resultTypes; |
| private final JReferenceType sourceType; |
| |
| /* |
| * Initially object; will be updated by type tightening. |
| */ |
| private JType type; |
| |
| /** |
| * Public constructor used during AST creation. |
| */ |
| public JGwtCreate(SourceInfo info, JReferenceType sourceType, |
| List<JClassType> resultTypes, JType type, JDeclaredType enclosingType) { |
| this(info, sourceType, resultTypes, type, createInstantiationExpressions( |
| info, resultTypes, enclosingType)); |
| } |
| |
| /** |
| * Constructor used for cloning an existing node. |
| */ |
| public JGwtCreate(SourceInfo info, JReferenceType sourceType, |
| List<JClassType> resultTypes, JType type, |
| ArrayList<JExpression> instantiationExpressions) { |
| super(info); |
| this.sourceType = sourceType; |
| this.resultTypes = resultTypes; |
| this.type = type; |
| this.instantiationExpressions = instantiationExpressions; |
| } |
| |
| public ArrayList<JExpression> getInstantiationExpressions() { |
| return instantiationExpressions; |
| } |
| |
| public List<JClassType> getResultTypes() { |
| return resultTypes; |
| } |
| |
| public JReferenceType getSourceType() { |
| return sourceType; |
| } |
| |
| public JType getType() { |
| return type; |
| } |
| |
| @Override |
| public boolean hasSideEffects() { |
| for (JExpression expr : instantiationExpressions) { |
| if (expr.hasSideEffects()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public void setType(JType newType) { |
| type = newType; |
| } |
| |
| public void traverse(JVisitor visitor, Context ctx) { |
| if (visitor.visit(this, ctx)) { |
| visitor.accept(instantiationExpressions); |
| } |
| visitor.endVisit(this, ctx); |
| } |
| } |