1 cananian 1.1.2.2 // ConstantClass.java, created Mon Jan 18 22:44:36 1999 by cananian 2 cananian 1.1.2.1 // Copyright (C) 1998 C. Scott Ananian <cananian@alumni.princeton.edu> 3 cananian 1.1.2.1 // Licensed under the terms of the GNU GPL; see COPYING for details. 4 cananian 1.1.2.1 package harpoon.IR.RawClass; 5 cananian 1.1.2.1 6 cananian 1.1.2.1 /** 7 cananian 1.1.2.1 * The <code>CONSTANT_Class_info</code> structure is used to 8 cananian 1.1.2.1 * represent a class or an interface. 9 cananian 1.1.2.1 * 10 cananian 1.1.2.1 * @author C. Scott Ananian <cananian@alumni.princeton.edu> 11 cananian 1.2 * @version $Id: ConstantClass.java,v 1.2 2002/02/25 21:05:26 cananian Exp $ 12 cananian 1.1.2.1 * @see "The Java Virtual Machine Specification, section 4.4.1" 13 cananian 1.1.2.1 * @see Constant 14 cananian 1.1.2.1 */ 15 cananian 1.1.2.1 public class ConstantClass extends Constant { 16 cananian 1.1.2.1 /** The value of the <code>name_index</code> item must be a valid 17 cananian 1.1.2.1 index into the <code>constant_pool</code> table of 18 cananian 1.1.2.1 <code>parent</code>. The <code>constant_pool</code> entry at 19 cananian 1.1.2.1 that index must be a <code>CONSTANT_Utf8_info</code> structure 20 cananian 1.1.2.1 representing a valid fully qualified Java class name that has 21 cananian 1.1.2.1 been converted to the <code>class</code> file's internal form. */ 22 cananian 1.1.2.1 public int name_index; 23 cananian 1.1.2.1 24 cananian 1.1.2.1 /** Constructor. */ 25 cananian 1.1.2.1 ConstantClass(ClassFile parent, ClassDataInputStream in) 26 cananian 1.1.2.1 throws java.io.IOException 27 cananian 1.1.2.1 { 28 cananian 1.1.2.1 super(parent); 29 cananian 1.1.2.1 name_index = in.read_u2(); 30 cananian 1.1.2.1 } 31 cananian 1.1.2.1 /** Constructor. */ 32 cananian 1.1.2.1 public ConstantClass(ClassFile parent, int name_index) { 33 cananian 1.1.2.1 super(parent); 34 cananian 1.1.2.1 this.name_index = name_index; 35 cananian 1.1.2.1 } 36 cananian 1.1.2.1 37 cananian 1.1.2.1 /** Write to a bytecode file. */ 38 cananian 1.1.2.1 public void write(ClassDataOutputStream out) throws java.io.IOException { 39 cananian 1.1.2.1 out.write_u1(CONSTANT_Class); 40 cananian 1.1.2.1 out.write_u2(name_index); 41 cananian 1.1.2.1 } 42 cananian 1.1.2.1 43 cananian 1.1.2.1 // convenience. 44 cananian 1.1.2.1 public ConstantUtf8 name_index() 45 cananian 1.1.2.1 { return (ConstantUtf8) parent.constant_pool[name_index]; } 46 cananian 1.1.2.1 47 cananian 1.1.2.1 public String name() { return name_index().val; } 48 cananian 1.1.2.1 49 cananian 1.1.2.1 /** Create a human-readable representation of this constant. */ 50 cananian 1.1.2.1 public String toString() { 51 cananian 1.1.2.1 return "CONSTANT_Class: " + name() + " {"+name_index+"}"; 52 cananian 1.1.2.1 } 53 cananian 1.2 }