[jboss-jira] [JBoss JIRA] (JASSIST-261) Issue with javassist on jdk 9b112
Steve Ebersole (JIRA)
issues at jboss.org
Thu Sep 29 10:01:00 EDT 2016
[ https://issues.jboss.org/browse/JASSIST-261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13300396#comment-13300396 ]
Steve Ebersole commented on JASSIST-261:
----------------------------------------
[~chiba] the jar [~smarlow] built for me that I used in testing Hibernate was Java 8 compatible (I was able to run the Hibernate tests fine using that SNAPSHOT and Java 8).
Do you mean that just the build is sensitive to the JDK used?
Not being able to work in both Java 8 and 9 at runtime is going to be a big headache.
> Issue with javassist on jdk 9b112
> ---------------------------------
>
> Key: JASSIST-261
> URL: https://issues.jboss.org/browse/JASSIST-261
> Project: Javassist
> Issue Type: Bug
> Affects Versions: 3.20.0-GA
> Environment: Javassist with jdk 9b112
> Reporter: Hoang Chuong Tran
> Assignee: Shigeru Chiba
>
> I am migrating a project to java 9, which also uses javassist to generate runtime code.
> One test of mine fails on jdk 9b112 while it passes on jdk 8u77.
> {noformat}
> import static javassist.CtClass.voidType;
> import java.lang.reflect.Method;
> import java.lang.reflect.Modifier;
> import java.util.HashMap;
> import java.util.Map;
> import org.junit.Test;
> import javassist.ClassClassPath;
> import javassist.ClassPool;
> import javassist.CtClass;
> import javassist.CtField;
> import javassist.CtMethod;
> import javassist.CtNewMethod;
> public class MyTests {
> public static class MyObject {
> protected Object field;
> Object getField() {return field;}
> public void setField(Object field) {}
> }
> @Test
> public void test() throws InstantiationException, IllegalAccessException {
> Class<? extends MyObject> clazz = compile(MyObject.class);
> clazz.newInstance().setField(null);
> }
> /** Compile a transfer class */
> public static synchronized Class<? extends MyObject> compile(Class<?> targetClass) {
> // Determine class setters
> Map<String, Method> setters = extractSetters(targetClass);
> ClassPool classPool = ClassPool.getDefault();
> classPool.insertClassPath(new ClassClassPath(targetClass));
> try {
> // Compile a new transfer class on the fly
> CtClass baseClass = classPool.get(MyObject.class.getName());
> CtClass proxyClass = classPool.makeClass(targetClass.getName() + "_Modified", baseClass);
> for(Method originalSetter : setters.values()) {
> // Create a field to hold the attribute
> Class<?> fieldClass = originalSetter.getParameterTypes()[0];
> CtClass fieldType = classPool.get(fieldClass.getName());
> String fieldName = originalSetter.getName().substring(3);
> CtField field = new CtField(fieldType, fieldName, proxyClass);
> proxyClass.addField(field);
> // Create a setter method to set that field
> CtClass[] parameters = new CtClass[] { fieldType };
> String setterBody = "{ System.out.println(\"Hello World\"); }";
> CtMethod setter = CtNewMethod.make(voidType, originalSetter.getName(), parameters, new CtClass[0], setterBody, proxyClass);
> proxyClass.addMethod(setter);
> }
> Class<? extends MyObject> javaClass = proxyClass.toClass(targetClass.getClassLoader(), targetClass.getProtectionDomain());
> return javaClass;
> } catch(Exception e) {
> throw new RuntimeException("Failure during transfer compilation for " + targetClass, e);
> }
> }
> /** Extract setter methods from a class */
> public static Map<String, Method> extractSetters(Class<?> cls) {
> Map<String, Method> setters = new HashMap<String, Method>();
> for(Method method : cls.getMethods()) {
> // Lookup setter methods
> if(method.getName().startsWith("set")) {
> // Only public setters
> int modifiers = method.getModifiers();
> if(Modifier.isPublic(modifiers)) {
> Class<?>[] exceptions = method.getExceptionTypes();
> Class<?>[] parameters = method.getParameterTypes();
> Class<?> returnType = method.getReturnType();
> if(exceptions.length <= 0 && parameters.length == 1 && "void".equals(returnType.getName())) {
> setters.put(method.getName(), method);
> }
> }
> }
> }
> return setters;
> }
> }
> {noformat}
> On jdk 8u77, the {{compile()}} function returns with success and "Hello world" is printed to the console.
> On jdk 9b112, I got the following exception
> {noformat}
> java.lang.RuntimeException: Failure during transfer compilation for class MyTests$MyObject
> at MyTests.compile(MyTests.java:68)
> at MyTests.test(MyTests.java:29)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(java.base at 9-ea/Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(java.base at 9-ea/NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(java.base at 9-ea/DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(java.base at 9-ea/Method.java:531)
> at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
> at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
> at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
> at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
> at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
> at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
> at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
> at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:670)
> at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
> at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
> Caused by: javassist.NotFoundException: java.lang.Object
> at javassist.ClassPool.get(ClassPool.java:450)
> at MyTests.compile(MyTests.java:51)
> ... 24 more
> {noformat}
> I suspect that is due to the jigsaw integration into the jdk.
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