Class LocalVariable

java.lang.Object
org.apache.bcel.classfile.LocalVariable
All Implemented Interfaces:
Cloneable, Node, Constants
public final class LocalVariable extends Object implements Cloneable, Node, Constants
This class represents a local variable within a method. It contains its scope, name, signature and index on the method's frame. It is used both to represent an element of the LocalVariableTable as well as an element of the LocalVariableTypeTable. The nomenclature used here may be a bit confusing; while the two items have the same layout in a class file, a LocalVariableTable attribute contains a descriptor_index, not a signatureIndex. The LocalVariableTypeTable attribute does have a signatureIndex.
See Also:

  • Constructor Details

    • LocalVariable

      public LocalVariable(int startPc, int length, int nameIndex, int signatureIndex, int index, ConstantPool constantPool)
      Constructs a LocalVariable.
      Parameters:
      startPc - Range in which the variable is valid.
      length - length of validity.
      nameIndex - Index in constant pool of variable name.
      signatureIndex - Index of variable's signature.
      index - Variable is 'index'th local variable on the method's frame.
      constantPool - Array of constants.

    • LocalVariable

      public LocalVariable(int startPc, int length, int nameIndex, int signatureIndex, int index, ConstantPool constantPool, int origIndex)
      Constructs a LocalVariable.
      Parameters:
      startPc - Range in which the variable is valid.
      length - length of validity.
      nameIndex - Index in constant pool of variable name.
      signatureIndex - Index of variable's signature.
      index - Variable is 'index'th local variable on the method's frame.
      constantPool - Array of constants.
      origIndex - Variable is 'index'th local variable on the method's frame prior to any changes.

    • LocalVariable

      public LocalVariable(LocalVariable localVariable)
      Initializes from another LocalVariable. Note that both objects use the same references (shallow copy). Use copy() for a physical copy.
      Parameters:
      localVariable - Another LocalVariable.

  • Method Details

    • accept

      public void accept(Visitor v)
      Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class. I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
      Specified by:
      accept in interface Node
      Parameters:
      v - Visitor object.

    • copy

      public LocalVariable copy()
      Creates a deep copy of this object.
      Returns:
      deep copy of this object.

    • dump

      public void dump(DataOutputStream dataOutputStream) throws IOException
      Dumps local variable to file stream in binary format.
      Parameters:
      dataOutputStream - Output file stream.
      Throws:
      IOException - if an I/O error occurs.
      See Also:

    • getConstantPool

      public ConstantPool getConstantPool()
      Gets the constant pool used by this object.
      Returns:
      Constant pool used by this object.

    • getIndex

      public int getIndex()
      Gets the index of register where variable is stored.
      Returns:
      index of register where variable is stored.

    • getLength

      public int getLength()
      Gets the length of validity.
      Returns:
      Variable is valid within getStartPC() .. getStartPC()+getLength().

    • getName

      public String getName()
      Gets the variable name.
      Returns:
      Variable name.

    • getNameIndex

      public int getNameIndex()
      Gets the index in constant pool of variable name.
      Returns:
      Index in constant pool of variable name.

    • getOrigIndex

      public int getOrigIndex()
      Gets the index of register where variable was originally stored.
      Returns:
      index of register where variable was originally stored.

    • getSignature

      public String getSignature()
      Gets the signature.
      Returns:
      Signature.

    • getSignatureIndex

      public int getSignatureIndex()
      Gets the index in constant pool of variable signature.
      Returns:
      Index in constant pool of variable signature.

    • getStartPC

      public int getStartPC()
      Gets the start of range where the variable is valid.
      Returns:
      Start of range where the variable is valid.

    • setConstantPool

      public void setConstantPool(ConstantPool constantPool)
      Sets the constant pool to be used for this object.
      Parameters:
      constantPool - Constant pool to be used for this object.

    • setIndex

      public void setIndex(int index)
      Sets the index in the local variable table of this variable.
      Parameters:
      index - the index in the local variable table of this variable.

    • setLength

      public void setLength(int length)
      Sets the length of this local variable.
      Parameters:
      length - the length of this local variable.

    • setNameIndex

      public void setNameIndex(int nameIndex)
      Sets the index into the constant pool for the name of this variable.
      Parameters:
      nameIndex - the index into the constant pool for the name of this variable.

    • setSignatureIndex

      public void setSignatureIndex(int signatureIndex)
      Sets the index into the constant pool for the signature of this variable.
      Parameters:
      signatureIndex - the index into the constant pool for the signature of this variable.

    • setStartPC

      public void setStartPC(int startPc)
      Sets the range where the local variable is valid.
      Parameters:
      startPc - Specify range where the local variable is valid.

    • toString

      public String toString()
      Gets the string representation.
      Overrides:
      toString in class Object
      Returns:
      string representation.