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package com.sun.jdo.api.persistence.enhancer.classfile;

import java.io.*;

/**
 * The abstract base class used to represent the various type of
 * references to members (fields/methods) within the constant pool. 
 */

public abstract class ConstBasicMemberRef extends ConstBasic {
  /* The name of the class on which the member is defined */
  protected ConstClass theClassName;

  /* The index of the class on which the member is defined
   *   - used temporarily while reading from a class file */
  protected int theClassNameIndex;

  /* The name and type of the member */
  protected ConstNameAndType theNameAndType;

  /* The index of the name and type of the member
   *   - used temporarily while reading from a class file */
  protected int theNameAndTypeIndex;

  /* public accessors */

  /**
   * Return the name of the class defining the member 
   */
  public ConstClass className() {
    return theClassName;
  }

  /**
   * Return the name and type of the member 
   */
  public ConstNameAndType nameAndType() {
    return theNameAndType;
  }

  public String toString () {
      return "className(" + theClassName.toString() + ")" +//NOI18N
          " nameAndType(" + theNameAndType.toString() + ")";//NOI18N
  }

  /* package local methods */

  /**
   * Constructor for "from scratch" creation
   */
  ConstBasicMemberRef (ConstClass cname, ConstNameAndType NT) {
    theClassName = cname;
    theNameAndType = NT;
  }

  /**
   * Constructor for reading from a class file
   */
  ConstBasicMemberRef (int cnameIndex, int NT_index) {
    theClassNameIndex = cnameIndex;
    theNameAndTypeIndex = NT_index;
  }

  void formatData (DataOutputStream b) throws IOException {
    b.writeShort(theClassName.getIndex());
    b.writeShort(theNameAndType.getIndex());
  }
  void resolve (ConstantPool p) {
    theClassName = (ConstClass) p.constantAt(theClassNameIndex);
    theNameAndType = (ConstNameAndType) p.constantAt(theNameAndTypeIndex);
  }
}