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* 2 along with this work; if not, write to the Free Software Foundation,
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/**
* @test
* @bug 8003280
* @summary Add lambda tests
* Test SAM conversion of method references in combinations of different contexts,
* lambda body types(statement/expression), boxing/unboxing etc, to verify
* SAM conversion being conducted successfully as expected.
* @modules jdk.compiler
*/
import com.sun.source.util.JavacTask;
import java.net.URI;
import java.util.Arrays;
import javax.tools.Diagnostic;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import javax.tools.ToolProvider;
import javax.tools.StandardJavaFileManager;
public class SamConversionComboTest {
enum FInterface {
A("A", "interface A { Integer m(int i); }"),
B("B", "interface B { int m(Integer i); }"),
C("C", "interface C { int m(int i) throws Exception; }");
String interfaceType;
String interfaceDef;
FInterface(String interfaceType, String interfaceDef) {
this.interfaceType = interfaceType;
this.interfaceDef = interfaceDef;
}
}
enum Context {
ASSIGNMENT("#FType f = #MR;"),
METHOD_CALL("void method1(#FType f) { }\n" +
"void method2() {\n" +
" method1(#MR);\n" +
"}"),
CONSTRUCTOR("X x = new X(#MR);"),
RETURN_OF_METHOD("#FType method1() {\n" +
" return #MR;\n" +
"}"),
ARRAY_INITIALIZER("#FType[] oarray = {#MR};"),
LAMBDA_BODY("#FType f = n -> ((#FType)#MR).m(n);"),
CAST("void test() throws Exception { int n = ((#FType)#MR).m(1); }"),
CONDITIONAL_EXPRESSION("#FType f = 2 > 1 ? #MR : null;");
String context;
Context(String context) {
this.context = context;
}
String getContext(FInterface f, MethodReference mr) {
return context.replace("#FType", f.interfaceType).replace("#MR", mr.mrValue);
}
}
enum MethodReference {
METHOD1("X::method1"),
METHOD2("new X()::method2"),
METHOD3("X::method3"),
METHOD4("new X()::method4"),
METHOD5("new X()::method5"),
METHOD6("X::method6"),
METHOD7("X::method7"),
METHOD8("X::method8");
String mrValue;
MethodReference(String mr) {
mrValue = mr;
}
}
enum MethodDef {
METHOD1(" static Integer method1(int n) {\n" +
" return n + 1;\n" +
" }\n", 0),
METHOD2(" int method2(Integer n) {\n" +
" return value == 0 ? n + 2 : n + value;\n" +
" }\n", 1),
METHOD3(" static int method3(int n) {\n" +
" return n + 3;\n" +
" }\n", 2),
METHOD4(" Integer method4(Integer n) {\n" +
" return value == 0 ? n + 4 : n + value;\n" +
" }\n", 3),
METHOD5(" Integer method5(Integer n) {\n" +
" return value == 0 ? new Integer(n + 5) : new Integer(n + value);\n" +
" }\n", 4),
METHOD6(" static int method6(Integer n) throws Exception{\n" +
" throw new Exception();\n" +
" }\n", 5),
METHOD7(" static int method7(String s){\n" +
" return s.length();\n" +
" }\n", 6),
METHOD8(" static String method8(Integer n){\n" +
" return n + \"\";\n" +
" }\n", 7);
String methodStr;
int index;
MethodDef(String ms, int i) {
methodStr = ms;
index = i;
}
MethodReference getMethodReference() {
return MethodReference.values()[index];
}
}
SourceFile samSourceFile = new SourceFile("FInterface.java", "#C") {
public String toString() {
String interfaces = "";
for(FInterface fi : FInterface.values())
interfaces += fi.interfaceDef + "\n";
return template.replace("#C", interfaces);
}
};
String clientTemplate = "class Client {\n" +
" #Context\n" +
"}\n\n" +
"class X {\n" +
" int value = 0;\n\n" +
" X() {\n" +
" }\n\n" +
" X(A a) {\n" +
" value = a.m(9);\n" +
" }\n\n" +
" X(B b) {\n" +
" value = b.m(9);\n" +
" }\n\n" +
" X(C c) {\n" +
" try {\n" +
" value = c.m(9);\n" +
" } catch (Exception e){}\n" +
" }\n\n" +
"#MethodDef" +
"}";
SourceFile clientSourceFile = new SourceFile("Client.java", clientTemplate) {
public String toString() {
return template.replace("#Context", context.getContext(fInterface, methodReference)).replace("#MethodDef", methodDef.methodStr);
}
};
boolean checkSamConversion() {
if(methodDef == MethodDef.METHOD7 || methodDef == MethodDef.METHOD8)//method signature mismatch
return false;
if(context != Context.CONSTRUCTOR && fInterface != FInterface.C && methodDef == MethodDef.METHOD6)
//method that throws exceptions not thrown by the interface method is a mismatch
return false;
if(context == Context.CONSTRUCTOR)
return false;
return true;
}
void test() throws Exception {
System.out.println("\n====================================");
System.out.println(fInterface + ", " + context + ", " + methodReference);
System.out.println(samSourceFile + "\n" + clientSourceFile);
DiagnosticChecker dc = new DiagnosticChecker();
JavacTask ct = (JavacTask)comp.getTask(null, fm, dc, null, null, Arrays.asList(samSourceFile, clientSourceFile));
ct.analyze();
if (dc.errorFound == checkSamConversion()) {
throw new AssertionError(samSourceFile + "\n\n" + clientSourceFile);
}
count++;
}
abstract class SourceFile extends SimpleJavaFileObject {
protected String template;
public SourceFile(String filename, String template) {
super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE);
this.template = template;
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return toString();
}
public abstract String toString();
}
static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
boolean errorFound = false;
public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
errorFound = true;
}
}
}
FInterface fInterface;
Context context;
MethodDef methodDef;
MethodReference methodReference;
static int count = 0;
static JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
static StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
SamConversionComboTest(FInterface f, Context c, MethodDef md) {
fInterface = f;
context = c;
methodDef = md;
methodReference = md.getMethodReference();
}
public static void main(String[] args) throws Exception {
try {
for(Context ct : Context.values()) {
for (FInterface fi : FInterface.values()) {
for (MethodDef md: MethodDef.values()) {
new SamConversionComboTest(fi, ct, md).test();
}
}
}
System.out.println("total tests: " + count);
} finally {
fm.close();
}
}
}