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

"Dave Brosius" <[email protected]>
Newsgroups gmane.comp.jakarta.bcel.user
Message-ID <00b901c4f9c8$aa7fe3a0$387596d1@MBFG> 
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]
>>> >>
>>> >
>>> >
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>>> >
>>> >
>>>
>>>
>>>
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>>
>>
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>>
>
>
>
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