reflectionUtils.cpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 1999, 2006, 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#include "incls/_precompiled.incl" 26#include "incls/_reflectionUtils.cpp.incl" 27 28KlassStream::KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only) { 29 _klass = klass; 30 if (classes_only) { 31 _interfaces = Universe::the_empty_system_obj_array(); 32 } else { 33 _interfaces = klass->transitive_interfaces(); 34 } 35 _interface_index = _interfaces->length(); 36 _local_only = local_only; 37 _classes_only = classes_only; 38} 39 40bool KlassStream::eos() { 41 if (index() >= 0) return false; 42 if (_local_only) return true; 43 if (!_klass->is_interface() && _klass->super() != NULL) { 44 // go up superclass chain (not for interfaces) 45 _klass = _klass->super(); 46 } else { 47 if (_interface_index > 0) { 48 _klass = klassOop(_interfaces->obj_at(--_interface_index)); 49 } else { 50 return true; 51 } 52 } 53 _index = length(); 54 next(); 55 return eos(); 56} 57 58 59GrowableArray<FilteredField*> *FilteredFieldsMap::_filtered_fields = 60 new (ResourceObj::C_HEAP) GrowableArray<FilteredField*>(3,true); 61 62 63void FilteredFieldsMap::initialize() { 64 int offset; 65 offset = java_lang_Throwable::get_backtrace_offset(); 66 _filtered_fields->append(new FilteredField(SystemDictionary::Throwable_klass(), offset)); 67 // The latest version of vm may be used with old jdk. 68 if (JDK_Version::is_gte_jdk16x_version()) { 69 // The following class fields do not exist in 70 // previous version of jdk. 71 offset = sun_reflect_ConstantPool::cp_oop_offset(); 72 _filtered_fields->append(new FilteredField(SystemDictionary::reflect_ConstantPool_klass(), offset)); 73 offset = sun_reflect_UnsafeStaticFieldAccessorImpl::base_offset(); 74 _filtered_fields->append(new FilteredField(SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(), offset)); 75 } 76} 77 78int FilteredFieldStream::field_count() { 79 int numflds = 0; 80 for (;!eos(); next()) { 81 numflds++; 82 } 83 return numflds; 84} 85