Re: ConstantNameAndType...how do get the type?

"Dean Hiller" <[email protected]>
Newsgroups gmane.comp.jakarta.bcel.user
Message-ID <[email protected]> 
Actually after the -g option is added, it works great, but I am confused now
and this is more just for my knowledge.

The one thing I don't get is I have a case statement for all the Constants
in the ConstantPool

Notice this one case statement....(My question is in the comments in the
below code...)

     byte tag = c.getTag();
     switch(tag) {
     case Constants.CONSTANT_Class:
          ///some stuff....
     break;
     case Constants.CONSTANT_Fieldref:
         //some stuff
     break;
     case Constants.CONSTANT_NameAndType:
          //Here I seem to be getting field signatures and method signatures
          //ie. I can use getReturnTypes but it will throw an exception on
some and on others I can use the code you gave me previously.
          // How do I tell if it is a field signature or method signature???
     break;

thanks,
dean


----- Original Message ----- 
From: "Dave Brosius" <[email protected]>
To: "BCEL Users List" <[email protected]>
Sent: Thursday, January 13, 2005 8:50 AM
Subject: Re: ConstantNameAndType...how do get the type?


> Oh, ()V is a method signature.
>
> Use
>
> Type getReturnType(String signature)
> or
> Type[] getArgumentTypes(String signature)
>
>
> ----- Original Message ----- 
> From: "Dean Hiller" <[email protected]>
> To: "BCEL Users List" <[email protected]>
> Sent: Thursday, January 13, 2005 9:53 AM
> Subject: Re: ConstantNameAndType...how do get the type?
>
>
> > thanks much for the hint, though that didn't seem to work as other
> > constants
> > then caused what looks like the same exception even though the code is
> > different.
> >
> > Here is the code with line numbers...
> >
> > 193      String sig5 = ((ConstantNameAndType)c).getSignature(pool);
> > 194      log("type="+Type.getType(sig5));
> >
> > Here is the exception...notice the exception coming out of line
194....(Is
> > there some way to prevent this?  This looks like the same exception I
got
> > with my previous code)
> >
> > 1)
> >
testLocalVarDepend(net.sf.antcontrib.design.VerifyDesignTest)C:\ROOT\views\s
> > fviews\ant-contrib2\test\resources\design\verifydesign.xml:102:
> > org.apache.bcel.classfile.ClassFormatException: Invalid method
signature:
> > ()V
> >
> > at org.apache.tools.ant.Task.perform(Task.java:373)
> >
> > at org.apache.tools.ant.Target.execute(Target.java:341)
> >
> > at org.apache.tools.ant.Target.performTasks(Target.java:369)
> >
> > at org.apache.tools.ant.Project.executeTarget(Project.java:1214)
> >
> > at
> > org.apache.tools.ant.BuildFileTest.executeTarget(BuildFileTest.java:232)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesignTest.testLocalVarDepend(VerifyDesignTes
> > t.java:116)
> >
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >
> > at
> >
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
> > )
> >
> > at
> >
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
> > .java:25)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesignTest.main(VerifyDesignTest.java:205)
> >
> > Caused by: org.apache.bcel.classfile.ClassFormatException: Invalid
method
> > signature: ()V
> >
> > at org.apache.bcel.classfile.Utility.typeOfSignature(Utility.java:1024)
> >
> > at org.apache.bcel.generic.Type.getType(Type.java:158)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesign.processConstant(VerifyDesign.java:194)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesign.processConstantPool(VerifyDesign.java:
> > 152)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesign.verifyClassAdheresToDesign(VerifyDesig
> > n.java:136)
> >
> > at net.sf.antcontrib.design.VerifyDesign.execute(VerifyDesign.java:94)
> >
> > at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
> >
> > at org.apache.tools.ant.Task.perform(Task.java:364)
> >
> > ... 21 more
> >
> > --- Nested Exception ---
> >
> > org.apache.bcel.classfile.ClassFormatException: Invalid method
signature:
> > ()V
> >
> > at org.apache.bcel.classfile.Utility.typeOfSignature(Utility.java:1024)
> >
> > at org.apache.bcel.generic.Type.getType(Type.java:158)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesign.processConstant(VerifyDesign.java:194)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesign.processConstantPool(VerifyDesign.java:
> > 152)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesign.verifyClassAdheresToDesign(VerifyDesig
> > n.java:136)
> >
> > at net.sf.antcontrib.design.VerifyDesign.execute(VerifyDesign.java:94)
> >
> > at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
> >
> > at org.apache.tools.ant.Task.perform(Task.java:364)
> >
> > at org.apache.tools.ant.Target.execute(Target.java:341)
> >
> > at org.apache.tools.ant.Target.performTasks(Target.java:369)
> >
> > at org.apache.tools.ant.Project.executeTarget(Project.java:1214)
> >
> > at
> > org.apache.tools.ant.BuildFileTest.executeTarget(BuildFileTest.java:232)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesignTest.testLocalVarDepend(VerifyDesignTes
> > t.java:116)
> >
> > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >
> > at
> >
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
> > )
> >
> > at
> >
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
> > .java:25)
> >
> > at
> >
net.sf.antcontrib.design.VerifyDesignTest.main(VerifyDesignTest.java:205)
> >
> >
> > ----- Original Message ----- 
> > From: "Dave Brosius" <[email protected]>
> > To: "BCEL Users List" <[email protected]>
> > Sent: Wednesday, January 12, 2005 11:03 PM
> > Subject: Re: ConstantNameAndType...how do get the type?
> >
> >
> >> Can't you use
> >> ConstantNameAndType.getSignature(pool), and then
> >> Type getType(String signature)
> >>
> >>
> >>
> >>
> >> I am trying to get the type information out of of a
> >> ConstantNameAndType...
> >>
> >> here is my code so far
> >>       String temp =
> >> pool.constantToString(((ConstantNameAndType)c).getNameIndex(),
> >> Constants.CONSTANT_Utf8)
> >>         + " "
> >>      +
> >> pool.constantToString(((ConstantNameAndType)c).getSignatureIndex(),
> >> Constants.CONSTANT_Utf8);
> >>       log("temp="+temp);
> >>       String temp2 =
> >> pool.constantToString(((ConstantNameAndType)c).getSignatureIndex(),
> >> Constants.CONSTANT_Utf8);
> >>       log("temp2="+temp2);
> >>       //log("temp2a="+Utility.typeOfSignature(temp2));
> >>       log("temp3="+Utility.compactClassName(temp2));
> >>
> >> which prints the following.....
> >> const[18]=c Lmod/dummy/DummyClass;
> >> inst=org.apache.bcel.classfile.ConstantNameAndType
> >>
> >> temp=c Lmod/dummy/DummyClass;
> >>
> >> temp2=Lmod/dummy/DummyClass;
> >>
> >> temp3=Lmod.dummy.DummyClass;
> >>
> >> I am just trying to get the mod.dummy.DummyClass string.  how do I do
so?
> >> If I uncomment the temp2a above it breaks because of other
> >> ConstantNameAndTypes like the following message when I uncomment temp2a
> >> above.....
> >>
> >> const[18]=<init> ()V inst=org.apache.bcel.classfile.ConstantNameAndType
> >>
> >> temp=<init> ()V
> >>
> >> temp2=()V
> >>
> >> E
> >>
> >> Time: 2.244
> >>
> >> There was 1 error:
> >>
> >> 1)
> >>
> >
testLocalVarDepend(net.sf.antcontrib.design.VerifyDesignTest)C:\ROOT\views\s
> > fviews\ant-contrib2\test\resources\design\verifydesign.xml:102:
> >> org.apache.bcel.classfile.ClassFormatException: Invalid method
signature:
> >> ()V
> >>
> >> at org.apache.tools.ant.Task.perform(Task.java:373)
> >>
> >> at org.apache.tools.ant.Target.execute(Target.java:341)
> >>
> >> at org.apache.tools.ant.Target.performTasks(Target.java:369)
> >>
> >> at org.apache.tools.ant.Project.executeTarget(Project.java:1214)
> >>
> >> at
> > org.apache.tools.ant.BuildFileTest.executeTarget(BuildFileTest.java:232)
> >>
> >> at
> >>
> >
net.sf.antcontrib.design.VerifyDesignTest.testLocalVarDepend(VerifyDesignTes
> > t.java:116)
> >>
> >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >>
> >> at
> >>
> >
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
> > )
> >>
> >> at
> >>
> >
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
> > .java:25)
> >>
> >> at
> >
net.sf.antcontrib.design.VerifyDesignTest.main(VerifyDesignTest.java:205)
> >>
> >> Caused by: org.apache.bcel.classfile.ClassFormatException: Invalid
method
> >> signature: ()V
> >>
> >> at org.apache.bcel.classfile.Utility.typeOfSignature(Utility.java:1024)
> >>
> >> at
> >>
> >
net.sf.antcontrib.design.VerifyDesign.processConstant(VerifyDesign.java:189)
> >>
> >> at
> >>
> >
net.sf.antcontrib.design.VerifyDesign.processConstantPool(VerifyDesign.java:
> > 151)
> >>
> >> at
> >>
> >
net.sf.antcontrib.design.VerifyDesign.verifyClassAdheresToDesign(VerifyDesig
> > n.java:135)
> >>
> >> at net.sf.antcontrib.design.VerifyDesign.execute(VerifyDesign.java:93)
> >>
> >> at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
> >>
> >> at org.apache.tools.ant.Task.perform(Task.java:364)
> >>
> >> ... 21 more
> >>
> >> --- Nested Exception ---
> >>
> >> org.apache.bcel.classfile.ClassFormatException: Invalid method
signature:
> >> ()V
> >>
> >> at org.apache.bcel.classfile.Utility.typeOfSignature(Utility.java:1024)
> >>
> >> at
> >>
> >
net.sf.antcontrib.design.VerifyDesign.processConstant(VerifyDesign.java:189)
> >>
> >> at
> >>
> >
net.sf.antcontrib.design.VerifyDesign.processConstantPool(VerifyDesign.java:
> > 151)
> >>
> >> at
> >>
> >
net.sf.antcontrib.design.VerifyDesign.verifyClassAdheresToDesign(VerifyDesig
> > n.java:135)
> >>
> >> at net.sf.antcontrib.design.VerifyDesign.execute(VerifyDesign.java:93)
> >>
> >> at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
> >>
> >> at org.apache.tools.ant.Task.perform(Task.java:364)
> >>
> >> at org.apache.tools.ant.Target.execute(Target.java:341)
> >>
> >> at org.apache.tools.ant.Target.performTasks(Target.java:369)
> >>
> >> at org.apache.tools.ant.Project.executeTarget(Project.java:1214)
> >>
> >> at
> > org.apache.tools.ant.BuildFileTest.executeTarget(BuildFileTest.java:232)
> >>
> >> at
> >>
> >
net.sf.antcontrib.design.VerifyDesignTest.testLocalVarDepend(VerifyDesignTes
> > t.java:116)
> >>
> >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >>
> >> at
> >>
> >
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39
> > )
> >>
> >> at
> >>
> >
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
> > .java:25)
> >>
> >> at
> >
net.sf.antcontrib.design.VerifyDesignTest.main(VerifyDesignTest.java:205)
> >>
> >> thanks for any help,
> >>
> >> dean
> >>
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: [email protected]
> >> For additional commands, e-mail: [email protected]
> >>
> >
> >
> > ---------------------------------------------------------------------
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> > For additional commands, e-mail: [email protected]
> >
> >
>
>
>
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