1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/lambda/FunctionalInterfaceConversionTest.java Fri Nov 30 15:14:25 2012 +0000
1.3 @@ -0,0 +1,280 @@
1.4 +/*
1.5 + * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/**
1.28 + * @test
1.29 + * @bug 8003280 8004102
1.30 + * @summary Add lambda tests
1.31 + * perform several automated checks in lambda conversion, esp. around accessibility
1.32 + * @author Maurizio Cimadamore
1.33 + * @run main FunctionalInterfaceConversionTest
1.34 + */
1.35 +
1.36 +import com.sun.source.util.JavacTask;
1.37 +import java.net.URI;
1.38 +import java.util.Arrays;
1.39 +import javax.tools.Diagnostic;
1.40 +import javax.tools.JavaCompiler;
1.41 +import javax.tools.JavaFileObject;
1.42 +import javax.tools.SimpleJavaFileObject;
1.43 +import javax.tools.StandardJavaFileManager;
1.44 +import javax.tools.ToolProvider;
1.45 +
1.46 +public class FunctionalInterfaceConversionTest {
1.47 +
1.48 + enum PackageKind {
1.49 + NO_PKG(""),
1.50 + PKG_A("a");
1.51 +
1.52 + String pkg;
1.53 +
1.54 + PackageKind(String pkg) {
1.55 + this.pkg = pkg;
1.56 + }
1.57 +
1.58 + String getPkgDecl() {
1.59 + return this == NO_PKG ?
1.60 + "" :
1.61 + "package " + pkg + ";";
1.62 + }
1.63 +
1.64 + String getImportStat() {
1.65 + return this == NO_PKG ?
1.66 + "" :
1.67 + "import " + pkg + ".*;";
1.68 + }
1.69 + }
1.70 +
1.71 + enum SamKind {
1.72 + CLASS("public class Sam { }"),
1.73 + ABSTACT_CLASS("public abstract class Sam { }"),
1.74 + ANNOTATION("public @interface Sam { }"),
1.75 + ENUM("public enum Sam { }"),
1.76 + INTERFACE("public interface Sam { \n #METH; \n }");
1.77 +
1.78 + String sam_str;
1.79 +
1.80 + SamKind(String sam_str) {
1.81 + this.sam_str = sam_str;
1.82 + }
1.83 +
1.84 + String getSam(String methStr) {
1.85 + return sam_str.replaceAll("#METH", methStr);
1.86 + }
1.87 + }
1.88 +
1.89 + enum ModifierKind {
1.90 + PUBLIC("public"),
1.91 + PACKAGE("");
1.92 +
1.93 + String modifier_str;
1.94 +
1.95 + ModifierKind(String modifier_str) {
1.96 + this.modifier_str = modifier_str;
1.97 + }
1.98 +
1.99 + boolean stricterThan(ModifierKind that) {
1.100 + return this.ordinal() > that.ordinal();
1.101 + }
1.102 + }
1.103 +
1.104 + enum TypeKind {
1.105 + EXCEPTION("Exception"),
1.106 + PKG_CLASS("PackageClass");
1.107 +
1.108 + String typeStr;
1.109 +
1.110 + private TypeKind(String typeStr) {
1.111 + this.typeStr = typeStr;
1.112 + }
1.113 + }
1.114 +
1.115 + enum ExprKind {
1.116 + LAMBDA("x -> null"),
1.117 + MREF("this::m");
1.118 +
1.119 + String exprStr;
1.120 +
1.121 + private ExprKind(String exprStr) {
1.122 + this.exprStr = exprStr;
1.123 + }
1.124 + }
1.125 +
1.126 + enum MethodKind {
1.127 + NONE(""),
1.128 + NON_GENERIC("public abstract #R m(#ARG s) throws #T;"),
1.129 + GENERIC("public abstract <X> #R m(#ARG s) throws #T;");
1.130 +
1.131 + String methodTemplate;
1.132 +
1.133 + private MethodKind(String methodTemplate) {
1.134 + this.methodTemplate = methodTemplate;
1.135 + }
1.136 +
1.137 + String getMethod(TypeKind retType, TypeKind argType, TypeKind thrownType) {
1.138 + return methodTemplate.replaceAll("#R", retType.typeStr).
1.139 + replaceAll("#ARG", argType.typeStr).
1.140 + replaceAll("#T", thrownType.typeStr);
1.141 + }
1.142 + }
1.143 +
1.144 + public static void main(String[] args) throws Exception {
1.145 + final JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
1.146 + StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
1.147 + for (PackageKind samPkg : PackageKind.values()) {
1.148 + for (ModifierKind modKind : ModifierKind.values()) {
1.149 + for (SamKind samKind : SamKind.values()) {
1.150 + for (MethodKind samMeth : MethodKind.values()) {
1.151 + for (MethodKind clientMeth : MethodKind.values()) {
1.152 + for (TypeKind retType : TypeKind.values()) {
1.153 + for (TypeKind argType : TypeKind.values()) {
1.154 + for (TypeKind thrownType : TypeKind.values()) {
1.155 + for (ExprKind exprKind : ExprKind.values()) {
1.156 + new FunctionalInterfaceConversionTest(samPkg, modKind, samKind,
1.157 + samMeth, clientMeth, retType, argType, thrownType, exprKind).test(comp, fm);
1.158 + }
1.159 + }
1.160 + }
1.161 + }
1.162 + }
1.163 + }
1.164 + }
1.165 + }
1.166 + }
1.167 + }
1.168 +
1.169 + PackageKind samPkg;
1.170 + ModifierKind modKind;
1.171 + SamKind samKind;
1.172 + MethodKind samMeth;
1.173 + MethodKind clientMeth;
1.174 + TypeKind retType;
1.175 + TypeKind argType;
1.176 + TypeKind thrownType;
1.177 + ExprKind exprKind;
1.178 + DiagnosticChecker dc;
1.179 +
1.180 + SourceFile samSourceFile = new SourceFile("Sam.java", "#P \n #C") {
1.181 + public String toString() {
1.182 + return template.replaceAll("#P", samPkg.getPkgDecl()).
1.183 + replaceAll("#C", samKind.getSam(samMeth.getMethod(retType, argType, thrownType)));
1.184 + }
1.185 + };
1.186 +
1.187 + SourceFile pkgClassSourceFile = new SourceFile("PackageClass.java",
1.188 + "#P\n #M class PackageClass extends Exception { }") {
1.189 + public String toString() {
1.190 + return template.replaceAll("#P", samPkg.getPkgDecl()).
1.191 + replaceAll("#M", modKind.modifier_str);
1.192 + }
1.193 + };
1.194 +
1.195 + SourceFile clientSourceFile = new SourceFile("Client.java",
1.196 + "#I\n abstract class Client { \n" +
1.197 + " Sam s = #E;\n" +
1.198 + " #M \n }") {
1.199 + public String toString() {
1.200 + return template.replaceAll("#I", samPkg.getImportStat())
1.201 + .replaceAll("#E", exprKind.exprStr)
1.202 + .replaceAll("#M", clientMeth.getMethod(retType, argType, thrownType));
1.203 + }
1.204 + };
1.205 +
1.206 + FunctionalInterfaceConversionTest(PackageKind samPkg, ModifierKind modKind, SamKind samKind,
1.207 + MethodKind samMeth, MethodKind clientMeth, TypeKind retType, TypeKind argType,
1.208 + TypeKind thrownType, ExprKind exprKind) {
1.209 + this.samPkg = samPkg;
1.210 + this.modKind = modKind;
1.211 + this.samKind = samKind;
1.212 + this.samMeth = samMeth;
1.213 + this.clientMeth = clientMeth;
1.214 + this.retType = retType;
1.215 + this.argType = argType;
1.216 + this.thrownType = thrownType;
1.217 + this.exprKind = exprKind;
1.218 + this.dc = new DiagnosticChecker();
1.219 + }
1.220 +
1.221 + void test(JavaCompiler comp, StandardJavaFileManager fm) throws Exception {
1.222 + JavacTask ct = (JavacTask)comp.getTask(null, fm, dc,
1.223 + null, null, Arrays.asList(samSourceFile, pkgClassSourceFile, clientSourceFile));
1.224 + ct.analyze();
1.225 + if (dc.errorFound == checkSamConversion()) {
1.226 + throw new AssertionError(samSourceFile + "\n\n" + pkgClassSourceFile + "\n\n" + clientSourceFile);
1.227 + }
1.228 + }
1.229 +
1.230 + boolean checkSamConversion() {
1.231 + if (samKind != SamKind.INTERFACE) {
1.232 + //sam type must be an interface
1.233 + return false;
1.234 + } else if (samMeth == MethodKind.NONE) {
1.235 + //interface must have at least a method
1.236 + return false;
1.237 + } else if (exprKind == ExprKind.LAMBDA &&
1.238 + samMeth != MethodKind.NON_GENERIC) {
1.239 + //target method for lambda must be non-generic
1.240 + return false;
1.241 + } else if (exprKind == ExprKind.MREF &&
1.242 + clientMeth == MethodKind.NONE) {
1.243 + return false;
1.244 + } else if (samPkg != PackageKind.NO_PKG &&
1.245 + modKind != ModifierKind.PUBLIC &&
1.246 + (retType == TypeKind.PKG_CLASS ||
1.247 + argType == TypeKind.PKG_CLASS ||
1.248 + thrownType == TypeKind.PKG_CLASS)) {
1.249 + //target must not contain inaccessible types
1.250 + return false;
1.251 + } else {
1.252 + return true;
1.253 + }
1.254 + }
1.255 +
1.256 + abstract class SourceFile extends SimpleJavaFileObject {
1.257 +
1.258 + protected String template;
1.259 +
1.260 + public SourceFile(String filename, String template) {
1.261 + super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE);
1.262 + this.template = template;
1.263 + }
1.264 +
1.265 + @Override
1.266 + public CharSequence getCharContent(boolean ignoreEncodingErrors) {
1.267 + return toString();
1.268 + }
1.269 +
1.270 + public abstract String toString();
1.271 + }
1.272 +
1.273 + static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
1.274 +
1.275 + boolean errorFound = false;
1.276 +
1.277 + public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
1.278 + if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
1.279 + errorFound = true;
1.280 + }
1.281 + }
1.282 + }
1.283 +}
