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/*
* Copyright (c) 2010, 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.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 6449781 6930508
* @summary Test that reported names of anonymous classes are non-null.
* @author Joseph D. Darcy
* @library /tools/javac/lib
* @modules jdk.compiler
* @build JavacTestingAbstractProcessor TestAnonSourceNames
* @compile -processor TestAnonSourceNames TestAnonClassNames.java
* @run main TestAnonClassNames
*/
/*
* This test operates in phases to test retrieving the qualified name
* of anonymous classes from type elements modeling the anonymous
* class. The type elements are generated using both source files and
* class files as the basis of constructing the elements.
*
* Source files will be tested by the @compile line which runs
* TestAnonSourceNames as an annotation processor over this file.
*
* Class files are tested by the @run command on this type. This
* class gets the names of classes with different nesting kinds,
* including anonymous classes, and then invokes the compiler with an
* annotation processor having the class files names as inputs. The
* compiler is invoked via the javax.tools mechanism.
*/
import java.lang.annotation.*;
import javax.lang.model.element.*;
import javax.annotation.processing.*;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.*;
import javax.lang.model.util.*;
import javax.tools.*;
import java.util.*;
import static java.lang.annotation.RetentionPolicy.*;
import static javax.lang.model.element.NestingKind.*;
import static javax.lang.model.util.ElementFilter.*;
import static javax.tools.Diagnostic.Kind.*;
import static javax.tools.StandardLocation.*;
@Nesting(TOP_LEVEL)
public class TestAnonClassNames {
@Nesting(MEMBER)
static class MemberClass1{}
@Nesting(MEMBER)
class MemberClass2{}
@Nesting(MEMBER)
class Win$$AtVegas { } // Class with funny name.
public static void main(String... argv) {
@Nesting(LOCAL)
class LocalClass{};
Object o = new @Nesting(ANONYMOUS) Object() { // An anonymous annotated class
public String toString() {
return "I have no name!";
}
};
Class<?>[] classes = {
MemberClass1.class,
MemberClass2.class,
LocalClass.class,
Win$$AtVegas.class,
o.getClass(),
TestAnonClassNames.class,
};
List<String> names = new ArrayList<String>();
for(Class<?> clazz : classes) {
String name = clazz.getName();
Nesting annotation = clazz.getAnnotation(Nesting.class);
NestingKind expected = annotation == null ?
NestingKind.ANONYMOUS : annotation.value();
System.out.format("%s is %s%n", name, expected);
testClassName(name);
names.add(name);
}
// test all names together
testClassNames(names);
if (errors > 0)
throw new RuntimeException(errors + " errors occurred");
}
/**
* Perform annotation processing on the class file name and verify
* the existence of different flavors of class names when the
* input classes are modeled as elements.
*/
static void testClassName(String className) {
testClassNames(Arrays.asList(className));
}
/**
* Perform annotation processing on a list of class file names and verify
* the existence of different flavors of class names when the
* input classes are modeled as elements.
*/
static void testClassNames(List<String> classNames) {
System.out.println("test: " + classNames);
List<String> options = new ArrayList<String>();
options.add("-proc:only");
options.add("-classpath");
options.add(System.getProperty("test.classes"));
JavaCompiler javaCompiler = ToolProvider.getSystemJavaCompiler();
JavaCompiler.CompilationTask compileTask =
javaCompiler.getTask(null, // Output
null, // File manager
null, // Diagnostics
options,
classNames,
null); // Sources
List<Processor> processors = new ArrayList<Processor>();
processors.add(new ClassNameProber());
compileTask.setProcessors(processors);
Boolean goodResult = compileTask.call();
if (!goodResult) {
error("Errors found during compile.");
}
}
static int errors = 0;
static void error(String msg) {
System.out.println("Error: " + msg);
errors++;
}
}
@Target({ElementType.TYPE, ElementType.TYPE_USE})
@Retention(RUNTIME)
@interface Nesting {
NestingKind value();
}
/**
* Probe at the various kinds of names of a type element.
*/
class ClassNameProber extends JavacTestingAbstractProcessor {
public ClassNameProber(){super();}
private boolean classesFound=false;
public boolean process(Set<? extends TypeElement> annotations,
RoundEnvironment roundEnv) {
if (!roundEnv.processingOver()) {
for(TypeElement typeElt : typesIn(roundEnv.getRootElements())) {
classesFound = true;
// Verify different names are non-null; an NPE will
// result in failed compile status being reported.
NestingKind nestingKind = typeElt.getNestingKind();
System.out.printf("\tSimple name: ''%s''\tQualified Name: ''%s''\tKind ''%s''\tNesting ''%s''%n",
typeElt.getSimpleName().toString(),
typeElt.getQualifiedName().toString(),
typeElt.getKind().toString(),
nestingKind.toString());
Nesting annotation = typeElt.getAnnotation(Nesting.class);
NestingKind expected = annotation == null ?
NestingKind.ANONYMOUS : annotation.value();
if (expected != nestingKind) {
throw new RuntimeException("Mismatch of expected and reported nesting kind.");
}
}
}
if (!classesFound) {
throw new RuntimeException("Error: no classes processed.");
}
return true;
}
}
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