Package org.jrd.agent

Class Transformer

  • All Implemented Interfaces:
    java.lang.instrument.ClassFileTransformer
    public class Transformer
extends java.lang.Object
implements java.lang.instrument.ClassFileTransformer
    This class represent our transformer for retrieving bytecode.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private boolean allowToSaveBytecode  
      private java.util.Map<java.lang.String,​byte[]> overrides  
      private java.util.Map<java.lang.String,​byte[]> results  

    • Constructor Summary

      Constructors 
      Constructor Description
      Transformer()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void allowToSaveBytecode()
      This method allows saving of bytecode
      java.util.List<java.lang.String> cleanOverrides​(java.util.regex.Pattern cleanPattern)  
      void denyToSaveBytecode()
      This method denies the bytecode to be saved during transformation.
      java.util.List<java.lang.String> getOverriddenFqns()  
      byte[] getResult​(java.lang.String name)
      Returns bytecode of transformed class.
      (package private) void removeOverride​(java.lang.String clazz)  
      void resetLastValidResult()
      Resets the map with results to empty map
      void setOverride​(java.lang.String name, byte[] body)  
      byte[] transform​(java.lang.ClassLoader loader, java.lang.String className, java.lang.Class<?> clazz, java.security.ProtectionDomain domain, byte[] classfileBuffer)  

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

      • Methods inherited from interface java.lang.instrument.ClassFileTransformer

        transform

    • Field Detail

      • allowToSaveBytecode

        private boolean allowToSaveBytecode

      • results

        private java.util.Map<java.lang.String,​byte[]> results

      • overrides

        private java.util.Map<java.lang.String,​byte[]> overrides

    • Constructor Detail

      • Transformer

        public Transformer()

    • Method Detail

      • transform

        public byte[] transform​(java.lang.ClassLoader loader,
                        java.lang.String className,
                        java.lang.Class<?> clazz,
                        java.security.ProtectionDomain domain,
                        byte[] classfileBuffer)
                 throws java.lang.instrument.IllegalClassFormatException
        Specified by:
        transform in interface java.lang.instrument.ClassFileTransformer
        Throws:
        java.lang.instrument.IllegalClassFormatException

      • getResult

        public byte[] getResult​(java.lang.String name)
        Returns bytecode of transformed class.
        Parameters:
        name - name of class we want to get
        Returns:
        bytes of given class

      • setOverride

        public void setOverride​(java.lang.String name,
                        byte[] body)

      • getOverriddenFqns

        public java.util.List<java.lang.String> getOverriddenFqns()

      • resetLastValidResult

        public void resetLastValidResult()
        Resets the map with results to empty map

      • allowToSaveBytecode

        public void allowToSaveBytecode()
        This method allows saving of bytecode

      • denyToSaveBytecode

        public void denyToSaveBytecode()
        This method denies the bytecode to be saved during transformation.

      • removeOverride

        void removeOverride​(java.lang.String clazz)

      • cleanOverrides

        public java.util.List<java.lang.String> cleanOverrides​(java.util.regex.Pattern cleanPattern)