1 /* 2 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.debugger.cdbg; 26 27 import sun.jvm.hotspot.debugger.*; 28 29 /** Provides uniform visitation to primitive and compound objects. 30 Typically one will have an Address of an "object" (in the 31 idealistic C++ definition, including "primitive objects" like 32 ints) and a Type for that object. This visitor interface allows 33 one to either get the value of the object (if of primitive type) 34 or iterate through its fields, getting the value of each, in a 35 consistent fashion. Also supports iteration through arrays of 36 known length. */ 37 38 public interface ObjectVisitor { 39 /** This is called before beginning iterating through either the 40 fields declared in this compound type (not its superclasses) or 41 the elements of this array */ enterType(Type type, Address objectAddress)42 public void enterType(Type type, Address objectAddress); 43 44 /** This is called after finishing iterating through this compound 45 type */ exitType()46 public void exitType(); 47 48 /** Primitive field or object of integer bitfield 49 type. FieldIdentifier is null if not a field of an enclosing 50 object. */ doBit(FieldIdentifier f, long val)51 public void doBit(FieldIdentifier f, long val); 52 53 /** Primitive field or object of integer type. FieldIdentifier is 54 null if not a field of an enclosing object. */ doInt(FieldIdentifier f, long val)55 public void doInt(FieldIdentifier f, long val); 56 57 /** Primitive field or object of enumerated type type. 58 FieldIdentifier is null if not a field of an enclosing 59 object. */ doEnum(FieldIdentifier f, long val, String enumName)60 public void doEnum(FieldIdentifier f, long val, String enumName); 61 62 /** Primitive field or object of single-precision floating-point 63 type. FieldIdentifier is null if not a field of an enclosing 64 object. */ doFloat(FieldIdentifier f, float val)65 public void doFloat(FieldIdentifier f, float val); 66 67 /** Primitive field or object of double-precision floating-point 68 type. FieldIdentifier is null if not a field of an enclosing 69 object. */ doDouble(FieldIdentifier f, double val)70 public void doDouble(FieldIdentifier f, double val); 71 72 /** Primitive field or object of pointer type. FieldIdentifier is 73 null if not a field of an enclosing object. */ doPointer(FieldIdentifier f, Address val)74 public void doPointer(FieldIdentifier f, Address val); 75 76 /** Primitive field or object of array type. FieldIdentifier is null 77 if not a field of an enclosing object. */ doArray(FieldIdentifier f, Address val)78 public void doArray(FieldIdentifier f, Address val); 79 80 /** Primitive field or object of (C++) reference 81 type. FieldIdentifier is null if not a field of an enclosing 82 object. */ doRef(FieldIdentifier f, Address val)83 public void doRef(FieldIdentifier f, Address val); 84 85 /** Identifies embedded objects in compound objects. FieldIdentifier 86 is null if not a field of an enclosing object. */ doCompound(FieldIdentifier f, Address addressOfEmbeddedCompoundObject)87 public void doCompound(FieldIdentifier f, Address addressOfEmbeddedCompoundObject); 88 } 89