289 lines
9.9 KiB
Java
289 lines
9.9 KiB
Java
/*
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* Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8003280
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* @summary Add lambda tests
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* Test SAM conversion of lambda expressions in combinations of different contexts,
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* lambda body types(statement/expression), explict/implicit target type etc, to verify
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* SAM conversion being conducted successfully as expected.
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* @modules jdk.compiler
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*/
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import com.sun.source.util.JavacTask;
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import java.net.URI;
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import java.util.Arrays;
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import javax.tools.Diagnostic;
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import javax.tools.JavaCompiler;
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import javax.tools.JavaFileManager;
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import javax.tools.JavaFileObject;
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import javax.tools.SimpleJavaFileObject;
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import javax.tools.ToolProvider;
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public class SamConversionComboTest {
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enum FInterface {
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A("A", "interface A { Integer m(int i); }"),
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B("B", "interface B { int m(Integer i); }"),
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C("C", "interface C { int m(Integer i) throws Exception; }");
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String interfaceType;
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String interfaceDef;
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FInterface(String interfaceType, String interfaceDef) {
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this.interfaceType = interfaceType;
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this.interfaceDef = interfaceDef;
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}
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String getParameterType() {
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switch(this) {
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case A:
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return "int";
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case B:
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case C:
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return "Integer";
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default:
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return null;
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}
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}
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}
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enum Context {
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ASSIGNMENT("#FType f = #LBody;"),
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METHOD_CALL("void method1(#FType f) { }\n" +
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" void method2() {\n" +
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" method1(#LBody);\n" +
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" }"),
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CONSTRUCTOR("X x = new X(#LBody);"),
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RETURN_OF_METHOD("#FType method1() {\n" +
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" return #LBody;\n" +
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"}"),
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ARRAY_INITIALIZER("Object[] oarray = {\"a\", 1, (#FType)#LBody};"),
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LAMBDA_BODY("#FType f = n -> ((#FType)#LBody).m(n);"),
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CAST("void test() throws Exception { int n = ((#FType)#LBody).m(1); }"),
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CONDITIONAL_EXPRESSION("#FType f = 2 > 1 ? #LBody : null;");
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String context;
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Context(String context) {
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this.context = context;
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}
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String getContext(FInterface f, LambdaKind lk, LambdaBody lb, ReturnValue rv) {
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return context.replace("#FType", f.interfaceType).replace("#LBody", lb.getLambdaBody(f, lk, rv));
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}
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}
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enum LambdaKind {
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EXPRESSION("#VAL"),
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STATEMENT("{return #VAL;}"),
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EXCEPTION_STMT("{throw new Exception();}");
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String stmt;
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LambdaKind(String stmt) {
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this.stmt = stmt;
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}
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}
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enum ReturnValue {
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INT("i + 1"),
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INTEGER("new Integer(i+1)"),
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INT2("i.intValue() + 1"),
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STRING("i + \"\""),
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DOUBLE("i * 1.0");
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String rValue;
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ReturnValue(String rValue) {
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this.rValue = rValue;
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}
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}
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enum LambdaBody {
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IMPLICIT("i -> #RET"),//type inferred
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EXPLICIT("(#Type i) -> #RET");//explicit type
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String bodyStr;
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LambdaBody(String bodyStr) {
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this.bodyStr = bodyStr;
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}
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String getLambdaBody(FInterface fi, LambdaKind lk, ReturnValue rv) {
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return bodyStr.replace("#Type", fi.getParameterType()).replace("#RET", lk.stmt.replace("#VAL", rv.rValue));
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}
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}
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boolean checkSamConversion() {
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if(lambdaKind != LambdaKind.EXCEPTION_STMT && (returnValue == ReturnValue.DOUBLE || returnValue == ReturnValue.STRING)) //return type mismatch
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return false;
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if(context != Context.CONSTRUCTOR) {//context other than construcotr argument
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if(fInterface != FInterface.C && lambdaKind == LambdaKind.EXCEPTION_STMT)
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return false;
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if(fInterface == FInterface.A && returnValue == ReturnValue.INT2)
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return false;
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}
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else { //constructor argument context
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//match X(A a) or X(B b) or X(C c)
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if (lambdaKind == LambdaKind.EXCEPTION_STMT) {
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return false; //ambiguous target type
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}
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else if(lambdaBody == LambdaBody.IMPLICIT) {
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return false;
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}
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else { //explicit parameter type
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if(fInterface.getParameterType().equals("Integer")) //ambiguous target type
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//e.g. X x = new X((Integer i) -> i + 1);
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return false;
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if(returnValue == ReturnValue.INT2)
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//e.g. X x = new X(int i -> i.intValue() + 1);
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return false;
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}
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}
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return true;
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}
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SourceFile samSourceFile = new SourceFile("FInterface.java", "#C") {
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public String toString() {
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String interfaces = "";
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for(FInterface fi : FInterface.values())
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interfaces += fi.interfaceDef + "\n";
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return template.replace("#C", interfaces);
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}
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};
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String clientTemplate = "class Client {\n" +
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" #Context\n" +
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"}\n\n" +
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"class X {\n" +
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" int value = 0;\n\n" +
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" X(A a) {\n" +
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" value = a.m(6);\n" +
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" }\n\n" +
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" X(B b) {\n" +
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" value = b.m(7);\n" +
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" }\n\n" +
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" X(C c) {\n" +
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" try {\n" +
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" value = c.m(8);\n" +
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" } catch (Exception e){}\n" +
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" }\n" +
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"}";
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SourceFile clientSourceFile = new SourceFile("Client.java", clientTemplate) {
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public String toString() {
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return template.replace("#Context", context.getContext(fInterface, lambdaKind, lambdaBody, returnValue));
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}
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};
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void test() throws Exception {
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System.out.println("\n====================================");
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System.out.println(fInterface + ", " + context + ", " + lambdaKind + ", " + lambdaBody + ", " + returnValue);
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System.out.println(samSourceFile + "\n");
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String clientFileStr = clientSourceFile.toString();
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System.out.println(clientFileStr.substring(0, clientFileStr.indexOf("\n\n")));
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DiagnosticChecker dc = new DiagnosticChecker();
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JavacTask ct = (JavacTask)comp.getTask(null, fm, dc, null, null, Arrays.asList(samSourceFile, clientSourceFile));
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try {
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ct.analyze();
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} catch (Exception e) {
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throw new AssertionError("failing SAM source file \n" + samSourceFile + "\n\n" + "failing client source file \n"+ clientSourceFile);
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}
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if (dc.errorFound == checkSamConversion()) {
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throw new AssertionError(samSourceFile + "\n\n" + clientSourceFile);
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}
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count++;
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}
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abstract class SourceFile extends SimpleJavaFileObject {
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protected String template;
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public SourceFile(String filename, String template) {
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super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE);
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this.template = template;
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}
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@Override
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public CharSequence getCharContent(boolean ignoreEncodingErrors) {
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return toString();
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}
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public abstract String toString();
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}
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static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
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boolean errorFound = false;
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public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
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if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
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errorFound = true;
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}
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}
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}
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FInterface fInterface;
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Context context;
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LambdaBody lambdaBody;
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LambdaKind lambdaKind;
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ReturnValue returnValue;
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static int count = 0;
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static JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
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static JavaFileManager fm = comp.getStandardFileManager(null, null, null);
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SamConversionComboTest(FInterface f, Context c, LambdaBody lb, LambdaKind lk, ReturnValue rv) {
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fInterface = f;
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context = c;
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lambdaKind = lk;
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lambdaBody = lb;
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returnValue = rv;
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}
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public static void main(String[] args) throws Exception {
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try {
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for(Context ct : Context.values()) {
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for (FInterface fi : FInterface.values()) {
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for (LambdaKind lk: LambdaKind.values()) {
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for (LambdaBody lb : LambdaBody.values()) {
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for(ReturnValue rv : ReturnValue.values()) {
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new SamConversionComboTest(fi, ct, lb, lk, rv).test();
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}
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}
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}
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}
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}
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System.out.println("total tests: " + count);
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} finally {
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fm.close();
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}
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}
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}
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