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

Thu, 13 Jan 2005 15:36:05 -0800

Obviously, you can look for an open parenthesis in the Signature string to see if it's a method signature.

----- Original Message ----- From: "Dave Brosius" <[EMAIL PROTECTED]>
To: "BCEL Users List" <[email protected]>
Sent: Thursday, January 13, 2005 5:29 PM
Subject: Re: ConstantNameAndType...how do get the type?


Yes, i bleieve CONSTANT_NameAndType can signify fields or methods.
I'm not sure at this level (getTag), you can differentiate, but could be wrong.


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]
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
>
>



---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]



---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]





---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]





---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]

Reply via email to