Package serp.bytecode

Class Instruction

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void acceptVisit​(BCVisitor visit)
      Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.
      boolean equalsInstruction​(Instruction other)
      Instructions are equal if their opcodes are the same.
      int getByteIndex()
      Return the index in the method code byte block at which this opcode starts.
      java.lang.ClassLoader getClassLoader()
      Return the class loader to use when loading related classes.
      Code getCode()
      Return the code block that owns this instruction.
      LineNumber getLineNumber()
      Return the line number of this instruction, or null if none.
      int getLogicalStackChange()
      Return the logical number of stack positions changed by this instruction.
      java.lang.String getName()
      Return the name of this instruction.
      int getOpcode()
      Return the opcode this instruction represents.
      ConstantPool getPool()
      Return the constant pool of the current class.
      Project getProject()
      Return the project of the current class.
      int getStackChange()
      Return the number of stack positions this instruction pushes or pops during its execution.
      boolean isValid()
      Return false if this entity has been removed from its parent; in this case the results of any operations on the entity are undefined.

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • getCode

        public Code getCode()
        Return the code block that owns this instruction.

      • getName

        public java.lang.String getName()
        Return the name of this instruction.

      • getOpcode

        public int getOpcode()
        Return the opcode this instruction represents.

      • getByteIndex

        public int getByteIndex()
        Return the index in the method code byte block at which this opcode starts. Note that this information may be out of date if the code block has been modified since last read/written.

      • getLogicalStackChange

        public int getLogicalStackChange()
        Return the logical number of stack positions changed by this instruction. In other words, ignore weirdness with longs and doubles taking two stack positions.

      • getStackChange

        public int getStackChange()
        Return the number of stack positions this instruction pushes or pops during its execution.
        Returns:
        0 if the stack is not affected by this instruction, a positive number if it pushes onto the stack, and a negative number if it pops from the stack

      • equalsInstruction

        public boolean equalsInstruction​(Instruction other)
        Instructions are equal if their opcodes are the same. Subclasses should override this method to perform a template comparison: instructions should compare equal to other instructions of the same type where the data is either the same or the data is unset.

      • getProject

        public Project getProject()
        Description copied from interface: BCEntity
        Return the project of the current class.
        Specified by:
        getProject in interface BCEntity

      • getPool

        public ConstantPool getPool()
        Description copied from interface: BCEntity
        Return the constant pool of the current class.
        Specified by:
        getPool in interface BCEntity

      • getClassLoader

        public java.lang.ClassLoader getClassLoader()
        Description copied from interface: BCEntity
        Return the class loader to use when loading related classes.
        Specified by:
        getClassLoader in interface BCEntity

      • isValid

        public boolean isValid()
        Description copied from interface: BCEntity
        Return false if this entity has been removed from its parent; in this case the results of any operations on the entity are undefined.
        Specified by:
        isValid in interface BCEntity

      • acceptVisit

        public void acceptVisit​(BCVisitor visit)
        Description copied from interface: VisitAcceptor
        Accept a visit from a BCVisitor, calling the appropriate methods to notify the visitor that it has entered this entity, and to provide it with the proper callbacks for each sub-entity owned by this one.
        Specified by:
        acceptVisit in interface VisitAcceptor