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Java Source Code / Java Documentation » Aspect oriented » aspectwerkz 2.0 » org.codehaus.aspectwerkz.definition 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.codehaus.aspectwerkz.definition.DescriptorUtil

DescriptorUtil
public class DescriptorUtil (Code)
The signature of a method that is available from the BCEL library uses descriptors as defined in Section 4.3 of the Java Virtual Machine specificaiton. Javadoc and Java do not use signatures in this same format. This class converts the Javadoc/Java signature format to that used by the JVM spec. To summarize the descriptors A method descriptor represents the parameters that the method takes and the value that it returns:

MethodDescriptor: ( ParameterDescriptor* ) ReturnDescriptor

A parameter descriptor represents a parameter passed to a method:

ParameterDescriptor: FieldType

A return descriptor represents the type of the value returned from a method. It is a series of characters generated by the grammar:

ReturnDescriptor: FieldType V

The character V indicates that the method returns no value (its return type is void).

A field descriptor represents the type of a class, instance, or local variable. It is a series of characters generated by the grammar:

FieldDescriptor: FieldType

ComponentType: FieldType

FieldType: BaseType ObjectType ArrayType

BaseType: B C D F I J S Z

ObjectType: L ;

ArrayType: [ ComponentType

The characters of BaseType, the L and ; of ObjectType, and the [ of ArrayType are all ASCII characters. The represents a fully qualified class or interface name. For historical reasons it is encoded in internal form (4.2). The interpretation of the field types is as shown in Table 4.2.

BaseType Character Type Interpretation ---------------------------------------------- B byte signed byte C char Unicode character D double double-precision floating-point value F float single-precision floating-point value I int integer J long long integer L; reference an instance of class S short signed short Z boolean true or false [ reference one array dimension
author:
   Mark Pollack





Method Summary
public static  Stringconvert(String javadocSig, String javadocReturnType)
     Converts from the Java/Javadoc method signature the JVM spec format.
Parameters:
  javadocSig - method signature as returned via Javadoc API.
Parameters:
  javadocReturnType - return type as returned via Javadoc API.
public static  String[]getParameters(String jvmSignature)
     Convert a JVM signature as defined in the JVM spec to that used in the Java.
Parameters:
  jvmSignature - The JVM format signature.



Method Detail
convert
public static String convert(String javadocSig, String javadocReturnType)(Code)
Converts from the Java/Javadoc method signature the JVM spec format.
Parameters:
  javadocSig - method signature as returned via Javadoc API.
Parameters:
  javadocReturnType - return type as returned via Javadoc API. mtehod signature as defined in the JVM spec.



getParameters
public static String[] getParameters(String jvmSignature)(Code)
Convert a JVM signature as defined in the JVM spec to that used in the Java.
Parameters:
  jvmSignature - The JVM format signature. a String[] containing the method parameter as elements of the array.



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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