/*
* Copyright 2013 Alexey Andreev.
*
* 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 org.teavm.classlib.java.lang;
import java.io.IOException;
import org.teavm.codegen.SourceWriter;
import org.teavm.dependency.*;
import org.teavm.javascript.ni.Generator;
import org.teavm.javascript.ni.GeneratorContext;
import org.teavm.javascript.ni.Injector;
import org.teavm.javascript.ni.InjectorContext;
import org.teavm.model.MethodReference;
/**
*
* @author Alexey Andreev <konsoletyper@gmail.com>
*/
public class ObjectNativeGenerator implements Generator, Injector, DependencyPlugin {
@Override
public void generate(GeneratorContext context, SourceWriter writer, MethodReference methodRef) throws IOException {
switch (methodRef.getDescriptor().getName()) {
case "<init>":
generateInit(context, writer);
break;
case "hashCode":
case "identity":
generateHashCode(context, writer);
break;
case "clone":
generateClone(context, writer);
break;
}
}
@Override
public void generate(InjectorContext context, MethodReference methodRef) throws IOException {
switch (methodRef.getName()) {
case "getClass":
generateGetClass(context);
break;
case "wrap":
generateWrap(context);
break;
}
}
@Override
public void methodAchieved(DependencyAgent agent, MethodDependency method) {
switch (method.getReference().getName()) {
case "clone":
method.getVariable(0).connect(method.getResult());
break;
case "getClass":
achieveGetClass(agent, method);
break;
case "wrap":
method.getVariable(1).connect(method.getResult());
break;
}
}
private void generateInit(GeneratorContext context, SourceWriter writer) throws IOException {
writer.append(context.getParameterName(0)).append(".$id = $rt_nextId();").softNewLine();
}
private void generateGetClass(InjectorContext context) throws IOException {
SourceWriter writer = context.getWriter();
writer.append("$rt_cls(");
context.writeExpr(context.getArgument(0));
writer.append(".constructor)");
}
private void achieveGetClass(DependencyAgent agent, MethodDependency method) {
MethodReference initMethod = new MethodReference(Class.class, "createNew", Class.class);
agent.linkMethod(initMethod, method.getStack()).use();
method.getResult().propagate(agent.getType("java.lang.Class"));
}
private void generateHashCode(GeneratorContext context, SourceWriter writer) throws IOException {
writer.append("return ").append(context.getParameterName(0)).append(".$id;").softNewLine();
}
private void generateClone(GeneratorContext context, SourceWriter writer) throws IOException {
String obj = context.getParameterName(0);
writer.append("var copy = new ").append(obj).append(".constructor();").softNewLine();
writer.append("for (var field in " + obj + ") {").softNewLine().indent();
writer.append("if (!" + obj + ".hasOwnProperty(field)) {").softNewLine().indent();
writer.append("continue;").softNewLine().outdent().append("}").softNewLine();
writer.append("copy[field] = " + obj + "[field];").softNewLine().outdent().append("}").softNewLine();
writer.append("return copy;").softNewLine();
}
private void generateWrap(InjectorContext context) throws IOException {
context.writeExpr(context.getArgument(0));
}
}