Package org.apache.bcel.generic

Class InvokeInstruction

java.lang.Object
org.apache.bcel.generic.Instruction
org.apache.bcel.generic.CPInstruction
org.apache.bcel.generic.FieldOrMethod
org.apache.bcel.generic.InvokeInstruction
All Implemented Interfaces:
Cloneable, ExceptionThrower, IndexedInstruction, LoadClass, StackConsumer, StackProducer, TypedInstruction
Direct Known Subclasses:
INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL
public abstract class InvokeInstruction extends FieldOrMethod implements ExceptionThrower, StackConsumer, StackProducer
Super class for the INVOKExxx family of instructions.

  • Constructor Details

    • InvokeInstruction

      protected InvokeInstruction(short opcode, int index)
      Parameters:
      index - to constant pool

  • Method Details

    • toString

      public String toString(ConstantPool cp)
      Overrides:
      toString in class CPInstruction
      Returns:
      mnemonic for instruction with symbolic references resolved

    • consumeStack

      public int consumeStack(ConstantPoolGen cpg)
      Also works for instructions whose stack effect depends on the constant pool entry they reference.
      Specified by:
      consumeStack in interface StackConsumer
      Overrides:
      consumeStack in class Instruction
      Returns:
      Number of words consumed from stack by this instruction

    • produceStack

      public int produceStack(ConstantPoolGen cpg)
      Also works for instructions whose stack effect depends on the constant pool entry they reference.
      Specified by:
      produceStack in interface StackProducer
      Overrides:
      produceStack in class Instruction
      Returns:
      Number of words produced onto stack by this instruction

    • getClassName

      public String getClassName(ConstantPoolGen cpg)
      This overrides the deprecated version as we know here that the referenced class may legally be an array.
      Overrides:
      getClassName in class FieldOrMethod
      Returns:
      name of the referenced class/interface
      Throws:
      IllegalArgumentException - if the referenced class is an array (this should not happen)

    • getType

      public Type getType(ConstantPoolGen cpg)
      Description copied from interface: LoadClass
      Returns the type associated with this instruction. LoadClass instances are always typed, but this type does not always refer to the type of the class or interface that it possibly forces to load. For example, GETFIELD would return the type of the field and not the type of the class where the field is defined. If no class is forced to be loaded, null is returned. An example for this is an ANEWARRAY instruction that creates an int[][].
      Specified by:
      getType in interface LoadClass
      Specified by:
      getType in interface TypedInstruction
      Overrides:
      getType in class CPInstruction
      Returns:
      return type of referenced method.
      See Also:

    • getMethodName

      public String getMethodName(ConstantPoolGen cpg)
      Returns:
      name of referenced method.

    • getReturnType

      public Type getReturnType(ConstantPoolGen cpg)
      Returns:
      return type of referenced method.

    • getArgumentTypes

      public Type[] getArgumentTypes(ConstantPoolGen cpg)
      Returns:
      argument types of referenced method.