/*
* Copyright ( c ) 2012 , 2015 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* This code is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
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* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
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*/
/*
* @ test
* @ bug 8003280
* @ summary Add lambda tests
* Check that self / forward references from lambda expressions behave
* consistently w . r . t . local inner classes
* @ modules jdk . compiler
*/
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.StandardJavaFileManager;
import javax.tools.ToolProvider;
import com.sun.source.util.JavacTask;
public class TestSelfRef {
static int checkCount = 0 ;
enum RefKind {
SELF_LAMBDA("SAM s = x->{ System.out.println(s); };" , true , false ),
FORWARD_LAMBDA("SAM s = x->{ System.out.println(f); };\nObject f = null;" , false , true ),
SELF_ANON("Object s = new Object() { void test() { System.out.println(s); } };" , true , false ),
FORWARD_ANON("Object s = new Object() { void test() { System.out.println(f); } }; Object f = null;" , false , true );
String refStr;
boolean selfRef;
boolean forwardRef;
private RefKind(String refStr, boolean selfRef, boolean forwardRef) {
this .refStr = refStr;
this .selfRef = selfRef;
this .forwardRef = forwardRef;
}
}
enum EnclosingKind {
TOPLEVEL("class C { #S }" ),
MEMBER_INNER("class Outer { class C { #S } }" ),
NESTED_INNER("class Outer { static class C { #S } }" );
String enclStr;
private EnclosingKind(String enclStr) {
this .enclStr = enclStr;
}
}
enum InnerKind {
NONE("#R" ),
LOCAL_NONE("class Local { #R }" ),
LOCAL_MTH("class Local { void test() { #R } }" ),
ANON_NONE("new Object() { #R };" ),
ANON_MTH("new Object() { void test() { #R } };" );
String innerStr;
private InnerKind(String innerStr) {
this .innerStr = innerStr;
}
boolean inMethodContext(SiteKind sk) {
switch (this ) {
case LOCAL_MTH:
case ANON_MTH: return true ;
case NONE: return sk != SiteKind.NONE;
default :
return false ;
}
}
}
enum SiteKind {
NONE("#I" ),
STATIC_INIT("static { #I }" ),
INSTANCE_INIT("{ #I }" ),
CONSTRUCTOR("C() { #I }" ),
METHOD("void test() { #I }" );
String siteStr;
private SiteKind(String siteStr) {
this .siteStr = siteStr;
}
}
public static void main(String... args) throws Exception {
//create default shared JavaCompiler - reused across multiple compilations
JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
try (StandardJavaFileManager fm = comp.getStandardFileManager(null , null , null )) {
for (EnclosingKind ek : EnclosingKind.values()) {
for (SiteKind sk : SiteKind.values()) {
if (sk == SiteKind.STATIC_INIT && ek == EnclosingKind.MEMBER_INNER)
continue ;
for (InnerKind ik : InnerKind.values()) {
if (ik != InnerKind.NONE && sk == SiteKind.NONE)
break ;
for (RefKind rk : RefKind.values()) {
new TestSelfRef(ek, sk, ik, rk).run(comp, fm);
}
}
}
}
System.out.println("Total check executed: " + checkCount);
}
}
EnclosingKind ek;
SiteKind sk;
InnerKind ik;
RefKind rk;
JavaSource source;
DiagnosticChecker diagChecker;
TestSelfRef(EnclosingKind ek, SiteKind sk, InnerKind ik, RefKind rk) {
this .ek = ek;
this .sk = sk;
this .ik = ik;
this .rk = rk;
this .source = new JavaSource();
this .diagChecker = new DiagnosticChecker();
}
class JavaSource extends SimpleJavaFileObject {
String bodyTemplate = "interface SAM { void test(Object o); }\n#B" ;
String source;
public JavaSource() {
super (URI.create("myfo:/Test.java" ), JavaFileObject.Kind.SOURCE);
source = bodyTemplate.replace("#B" ,
ek.enclStr.replace("#S" , sk.siteStr.replace("#I" , ik.innerStr.replace("#R" , rk.refStr))));
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return source;
}
}
void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
JavacTask ct = (JavacTask)tool.getTask(null , fm, diagChecker,
null , null , Arrays.asList(source));
try {
ct.analyze();
} catch (Throwable ex) {
throw new AssertionError("Error thron when compiling the following code:\n" + source.getCharContent(true ));
}
check();
}
boolean isErrorExpected() {
//illegal forward ref
boolean result = ik.inMethodContext(sk) && (rk.selfRef || rk.forwardRef);
result |= (rk == RefKind.SELF_LAMBDA || rk == RefKind.FORWARD_LAMBDA);
return result;
}
void check() {
checkCount++;
boolean errorExpected = isErrorExpected();
if (diagChecker.errorFound != errorExpected) {
throw new Error("invalid diagnostics for source:\n" +
source.getCharContent(true ) +
"\nFound error: " + diagChecker.errorFound +
"\nExpected error: " + errorExpected);
}
}
static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
boolean errorFound;
public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
errorFound = true ;
}
}
}
}
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