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*
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* 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).
*
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* 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;
}
}
}
}