[JBoss JIRA] (JASSIST-167) GenericSignatureFormatError when calling Field.getDeclaredAnnotations() on javassist field/annotation
2:17 p.m.
Jeffrey Selk created JASSIST-167:
------------------------------------
Summary: GenericSignatureFormatError when calling
Field.getDeclaredAnnotations() on javassist field/annotation
Key: JASSIST-167
URL: https://issues.jboss.org/browse/JASSIST-167
Project: Javassist
Issue Type: Bug
Affects Versions: 3.12.0.GA
Environment: CentOS release 6.2 x64
Linux tucker 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011 x86_64 x86_64 x86_64
GNU/Linux
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b04)
Java HotSpot(TM) Server VM (build 20.6-b01, mixed mode)
Reporter: Jeffrey Selk
Assignee: Shigeru Chiba
Using javassist to create a Field with an Annotation on it, and the Annotation contains a
member that is an Enumeration, after the class is created a GenericSignatureFormatError is
thrown when trying to introspect the Field.
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5:59 a.m.
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https://issues.jboss.org/browse/JASSIST-167?page=com.atlassian.jira.plugi...
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Shigeru Chiba commented on JASSIST-167:
---------------------------------------
@Retention(value=RetentionPolicy.RUNTIME) is available only for annotations.
But you added this annotation to a field.
Isn't this a reason of your problem?
GenericSignatureFormatError when calling
Field.getDeclaredAnnotations() on javassist field/annotation
-----------------------------------------------------------------------------------------------------
Key: JASSIST-167
URL: https://issues.jboss.org/browse/JASSIST-167
Project: Javassist
Issue Type: Bug
Affects Versions: 3.12.0.GA
Environment: CentOS release 6.2 x64
Linux tucker 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011 x86_64 x86_64
x86_64 GNU/Linux
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b04)
Java HotSpot(TM) Server VM (build 20.6-b01, mixed mode)
Reporter: Jeffrey Selk
Assignee: Shigeru Chiba
Using javassist to create a Field with an Annotation on it, and the Annotation contains a
member that is an Enumeration, after the class is created a GenericSignatureFormatError is
thrown when trying to introspect the Field.
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9:20 a.m.
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https://issues.jboss.org/browse/JASSIST-167?page=com.atlassian.jira.plugi...
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Jeffrey Selk commented on JASSIST-167:
--------------------------------------
I chose to use Retention and RentionPolicy because they were built-in java types but since
it doesn't apply to Fields this was a bad example. Here's a better one using an
Enum I define:
{code:title=MyUnit.java|borderStyle=solid}
// ENUM DEFINITION
package com.mytestcase
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.concurrent.TimeUnit;
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER })
public @interface MyUnit {
TimeUnit unit();
}
{code}
{code:title=MyTest.java|borderStyle=solid}
// JAVA ASSIST CODE
try {
ClassPool pool = ClassPool.getDefault();
CtClass bean = pool.makeClass("com.mytestcase.test.TestClass");
String fieldCode = "private java.lang.String myString;";
CtField field = CtField.make(fieldCode, bean);
bean.addField(field);
ConstPool constPool = field.getFieldInfo().getConstPool();
AnnotationsAttribute annoAttr = new AnnotationsAttribute(constPool,
AnnotationsAttribute.visibleTag);
javassist.bytecode.annotation.Annotation annot = new
javassist.bytecode.annotation.Annotation(
com.mytestcase.MyUnit.class.getName(), constPool);
EnumMemberValue e = new EnumMemberValue(constPool);
e.setType(java.util.concurrent.TimeUnit.class.toString());
e.setValue("DAYS");
annot.addMemberValue("unit", e);
field.getFieldInfo().addAttribute(annoAttr);
annoAttr.addAnnotation(annot);
Class<?> builtClass = bean.toClass();
builtClass.getDeclaredFields()[0].getDeclaredAnnotations(); // throws
// Exception
} catch (CannotCompileException e) {
e.printStackTrace();
}
{code}
GenericSignatureFormatError when calling
Field.getDeclaredAnnotations() on javassist field/annotation
-----------------------------------------------------------------------------------------------------
Key: JASSIST-167
URL: https://issues.jboss.org/browse/JASSIST-167
Project: Javassist
Issue Type: Bug
Affects Versions: 3.12.0.GA
Environment: CentOS release 6.2 x64
Linux tucker 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011 x86_64 x86_64
x86_64 GNU/Linux
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b04)
Java HotSpot(TM) Server VM (build 20.6-b01, mixed mode)
Reporter: Jeffrey Selk
Assignee: Shigeru Chiba
Using javassist to create a Field with an Annotation on it, and the Annotation contains a
member that is an Enumeration, after the class is created a GenericSignatureFormatError is
thrown when trying to introspect the Field.
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9:22 a.m.
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Jeffrey Selk updated JASSIST-167:
---------------------------------
Steps to Reproduce:
{code:title=Example.java|borderStyle=solid}
try {
ClassPool pool = ClassPool.getDefault();
CtClass bean = pool.makeClass("com.mytestcase.test.TestClass");
String fieldCode = "private java.lang.String myString;";
CtField field = CtField.make(fieldCode, bean);
bean.addField(field);
ConstPool constPool = field.getFieldInfo().getConstPool();
AnnotationsAttribute annoAttr = new AnnotationsAttribute(constPool,
AnnotationsAttribute.visibleTag);
javassist.bytecode.annotation.Annotation annot = new
javassist.bytecode.annotation.Annotation(
java.lang.annotation.Retention.class.getName(), constPool);
EnumMemberValue e = new EnumMemberValue(constPool);
e.setType(java.lang.annotation.RetentionPolicy.class.toString());
e.setValue("RUNTIME");
annot.addMemberValue("value", e);
field.getFieldInfo().addAttribute(annoAttr);
annoAttr.addAnnotation(annot);
Class<?> builtClass = bean.toClass();
builtClass.getDeclaredFields()[0].getDeclaredAnnotations(); // throws
Exception
} catch (CannotCompileException e) {
e.printStackTrace();
}
{code}
was:
try {
ClassPool pool = ClassPool.getDefault();
CtClass bean = pool.makeClass("com.mytestcase.test.TestClass");
String fieldCode = "private java.lang.String myString;";
CtField field = CtField.make(fieldCode, bean);
bean.addField(field);
ConstPool constPool = field.getFieldInfo().getConstPool();
AnnotationsAttribute annoAttr = new AnnotationsAttribute(constPool,
AnnotationsAttribute.visibleTag);
javassist.bytecode.annotation.Annotation annot = new
javassist.bytecode.annotation.Annotation(
java.lang.annotation.Retention.class.getName(), constPool);
EnumMemberValue e = new EnumMemberValue(constPool);
e.setType(java.lang.annotation.RetentionPolicy.class.toString());
e.setValue("RUNTIME");
annot.addMemberValue("value", e);
field.getFieldInfo().addAttribute(annoAttr);
annoAttr.addAnnotation(annot);
Class<?> builtClass = bean.toClass();
builtClass.getDeclaredFields()[0].getDeclaredAnnotations(); // throws
Exception
} catch (CannotCompileException e) {
e.printStackTrace();
}
GenericSignatureFormatError when calling
Field.getDeclaredAnnotations() on javassist field/annotation
-----------------------------------------------------------------------------------------------------
Key: JASSIST-167
URL: https://issues.jboss.org/browse/JASSIST-167
Project: Javassist
Issue Type: Bug
Affects Versions: 3.12.0.GA
Environment: CentOS release 6.2 x64
Linux tucker 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011 x86_64 x86_64
x86_64 GNU/Linux
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b04)
Java HotSpot(TM) Server VM (build 20.6-b01, mixed mode)
Reporter: Jeffrey Selk
Assignee: Shigeru Chiba
Using javassist to create a Field with an Annotation on it, and the Annotation contains a
member that is an Enumeration, after the class is created a GenericSignatureFormatError is
thrown when trying to introspect the Field.
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9:49 a.m.
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Shigeru Chiba commented on JASSIST-167:
---------------------------------------
This statement is wrong.
e.setType(java.util.concurrent.TimeUnit.class.toString())
because TimeUnit.class.toString() returns "class java.util...TimeUnit". The
right one is:
e.setType(java.util.concurrent.TimeUnit.class.getName())
getName() returns "java.util...TimeUnit"; no "class " at the
beginning.
GenericSignatureFormatError when calling
Field.getDeclaredAnnotations() on javassist field/annotation
-----------------------------------------------------------------------------------------------------
Key: JASSIST-167
URL: https://issues.jboss.org/browse/JASSIST-167
Project: Javassist
Issue Type: Bug
Affects Versions: 3.12.0.GA
Environment: CentOS release 6.2 x64
Linux tucker 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011 x86_64 x86_64
x86_64 GNU/Linux
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b04)
Java HotSpot(TM) Server VM (build 20.6-b01, mixed mode)
Reporter: Jeffrey Selk
Assignee: Shigeru Chiba
Using javassist to create a Field with an Annotation on it, and the Annotation contains a
member that is an Enumeration, after the class is created a GenericSignatureFormatError is
thrown when trying to introspect the Field.
--
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10:08 a.m.
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https://issues.jboss.org/browse/JASSIST-167?page=com.atlassian.jira.plugi...
]
Jeffrey Selk closed JASSIST-167.
--------------------------------
Resolution: Rejected
No defect exists as there was an issue with my code as per Shigeru's last comment.
GenericSignatureFormatError when calling
Field.getDeclaredAnnotations() on javassist field/annotation
-----------------------------------------------------------------------------------------------------
Key: JASSIST-167
URL: https://issues.jboss.org/browse/JASSIST-167
Project: Javassist
Issue Type: Bug
Affects Versions: 3.12.0.GA
Environment: CentOS release 6.2 x64
Linux tucker 2.6.32-220.el6.x86_64 #1 SMP Tue Dec 6 19:48:22 GMT 2011 x86_64 x86_64
x86_64 GNU/Linux
java version "1.6.0_31"
Java(TM) SE Runtime Environment (build 1.6.0_31-b04)
Java HotSpot(TM) Server VM (build 20.6-b01, mixed mode)
Reporter: Jeffrey Selk
Assignee: Shigeru Chiba
Using javassist to create a Field with an Annotation on it, and the Annotation contains a
member that is an Enumeration, after the class is created a GenericSignatureFormatError is
thrown when trying to introspect the Field.
--
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If you think it was sent incorrectly, please contact your JIRA administrators:
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4622
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4627
days old
5 comments
2 participants
participants (2)
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Jeffrey Selk (JIRA) -
Shigeru Chiba (JIRA)