org.springframework.asm

Class Label

  • java.lang.Object
    • org.springframework.asm.Label


  • public class Label
    extends java.lang.Object
    A position in the bytecode of a method. Labels are used for jump, goto, and switch instructions, and for try catch blocks. A label designates the instruction that is just after. Note however that there can be other elements between a label and the instruction it designates (such as other labels, stack map frames, line numbers, etc.).
    Author:
    Eric Bruneton
    • Field Summary

      Fields 
      Modifier and Type Field and Description
      java.lang.Object info
      A user managed state associated with this label.
    • Constructor Summary

      Constructors 
      Constructor and Description
      Label()
      Constructs a new label.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method and Description
      int getOffset()
      Returns the bytecode offset corresponding to this label.
      java.lang.String toString()
      Returns a string representation of this label.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
    • Field Detail

      • info

        public java.lang.Object info
        A user managed state associated with this label. Warning: this field is used by the ASM tree package. In order to use it with the ASM tree package you must override the getLabelNode method in MethodNode.
    • Constructor Detail

      • Label

        public Label()
        Constructs a new label.
    • Method Detail

      • getOffset

        public int getOffset()
        Returns the bytecode offset corresponding to this label. This offset is computed from the start of the method's bytecode. This method is intended for Attribute sub classes, and is normally not needed by class generators or adapters.
        Returns:
        the bytecode offset corresponding to this label.
        Throws:
        java.lang.IllegalStateException - if this label is not resolved yet.
      • toString

        public java.lang.String toString()
        Returns a string representation of this label.
        Overrides:
        toString in class java.lang.Object
        Returns:
        a string representation of this label.