author | trims |
Thu, 27 May 2010 19:08:38 -0700 | |
changeset 5547 | f4b087cbb361 |
parent 1 | 489c9b5090e2 |
child 7397 | 5b173b4ca846 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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// A KlassStream is an abstract stream for streaming over self, superclasses |
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// and (super)interfaces. Streaming is done in reverse order (subclasses first, |
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// interfaces last). |
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// |
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// for (KlassStream st(k, false, false); !st.eos(); st.next()) { |
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// klassOop k = st.klass(); |
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// ... |
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// } |
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class KlassStream VALUE_OBJ_CLASS_SPEC { |
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protected: |
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instanceKlassHandle _klass; // current klass/interface iterated over |
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objArrayHandle _interfaces; // transitive interfaces for initial class |
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int _interface_index; // current interface being processed |
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bool _local_only; // process initial class/interface only |
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bool _classes_only; // process classes only (no interfaces) |
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int _index; |
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virtual int length() const = 0; |
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public: |
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// constructor |
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KlassStream(instanceKlassHandle klass, bool local_only, bool classes_only); |
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// testing |
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bool eos(); |
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// iterating |
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virtual void next() = 0; |
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// accessors |
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instanceKlassHandle klass() const { return _klass; } |
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int index() const { return _index; } |
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}; |
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// A MethodStream streams over all methods in a class, superclasses and (super)interfaces. |
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// Streaming is done in reverse order (subclasses first, methods in reverse order) |
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// Usage: |
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// |
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// for (MethodStream st(k, false, false); !st.eos(); st.next()) { |
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// methodOop m = st.method(); |
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// ... |
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// } |
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class MethodStream : public KlassStream { |
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private: |
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int length() const { return methods()->length(); } |
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objArrayOop methods() const { return _klass->methods(); } |
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public: |
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MethodStream(instanceKlassHandle klass, bool local_only, bool classes_only) |
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: KlassStream(klass, local_only, classes_only) { |
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_index = length(); |
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next(); |
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} |
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void next() { _index--; } |
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methodOop method() const { return methodOop(methods()->obj_at(index())); } |
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}; |
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// A FieldStream streams over all fields in a class, superclasses and (super)interfaces. |
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// Streaming is done in reverse order (subclasses first, fields in reverse order) |
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// Usage: |
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// |
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// for (FieldStream st(k, false, false); !st.eos(); st.next()) { |
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// symbolOop field_name = st.name(); |
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// ... |
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// } |
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class FieldStream : public KlassStream { |
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private: |
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int length() const { return fields()->length(); } |
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constantPoolOop constants() const { return _klass->constants(); } |
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protected: |
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typeArrayOop fields() const { return _klass->fields(); } |
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public: |
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FieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) |
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: KlassStream(klass, local_only, classes_only) { |
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_index = length(); |
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next(); |
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} |
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void next() { _index -= instanceKlass::next_offset; } |
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// Accessors for current field |
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AccessFlags access_flags() const { |
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AccessFlags flags; |
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flags.set_flags(fields()->ushort_at(index() + instanceKlass::access_flags_offset)); |
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return flags; |
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} |
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symbolOop name() const { |
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int name_index = fields()->ushort_at(index() + instanceKlass::name_index_offset); |
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return constants()->symbol_at(name_index); |
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} |
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symbolOop signature() const { |
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int signature_index = fields()->ushort_at(index() + |
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instanceKlass::signature_index_offset); |
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return constants()->symbol_at(signature_index); |
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} |
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// missing: initval() |
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int offset() const { |
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return _klass->offset_from_fields( index() ); |
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} |
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}; |
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class FilteredField { |
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private: |
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klassOop _klass; |
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int _field_offset; |
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public: |
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FilteredField(klassOop klass, int field_offset) { |
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_klass = klass; |
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_field_offset = field_offset; |
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} |
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klassOop klass() { return _klass; } |
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oop* klass_addr() { return (oop*) &_klass; } |
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int field_offset() { return _field_offset; } |
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}; |
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class FilteredFieldsMap : AllStatic { |
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private: |
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static GrowableArray<FilteredField *> *_filtered_fields; |
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public: |
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static void initialize(); |
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static bool is_filtered_field(klassOop klass, int field_offset) { |
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for (int i=0; i < _filtered_fields->length(); i++) { |
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if (klass == _filtered_fields->at(i)->klass() && |
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field_offset == _filtered_fields->at(i)->field_offset()) { |
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return true; |
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} |
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} |
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return false; |
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} |
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static int filtered_fields_count(klassOop klass, bool local_only) { |
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int nflds = 0; |
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for (int i=0; i < _filtered_fields->length(); i++) { |
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if (local_only && klass == _filtered_fields->at(i)->klass()) { |
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nflds++; |
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} else if (klass->klass_part()->is_subtype_of(_filtered_fields->at(i)->klass())) { |
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nflds++; |
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} |
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} |
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return nflds; |
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} |
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// GC support. |
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static void klasses_oops_do(OopClosure* f) { |
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for (int i = 0; i < _filtered_fields->length(); i++) { |
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f->do_oop((oop*)_filtered_fields->at(i)->klass_addr()); |
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} |
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} |
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}; |
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// A FilteredFieldStream streams over all fields in a class, superclasses and |
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// (super)interfaces. Streaming is done in reverse order (subclasses first, |
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// fields in reverse order) |
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// |
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// Usage: |
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// |
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// for (FilteredFieldStream st(k, false, false); !st.eos(); st.next()) { |
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// symbolOop field_name = st.name(); |
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// ... |
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// } |
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class FilteredFieldStream : public FieldStream { |
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private: |
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int _filtered_fields_count; |
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bool has_filtered_field() { return (_filtered_fields_count > 0); } |
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public: |
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FilteredFieldStream(instanceKlassHandle klass, bool local_only, bool classes_only) |
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: FieldStream(klass, local_only, classes_only) { |
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_filtered_fields_count = FilteredFieldsMap::filtered_fields_count((klassOop)klass(), local_only); |
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} |
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int field_count(); |
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void next() { |
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_index -= instanceKlass::next_offset; |
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if (has_filtered_field()) { |
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while (_index >=0 && FilteredFieldsMap::is_filtered_field((klassOop)_klass(), offset())) { |
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_index -= instanceKlass::next_offset; |
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} |
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} |
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} |
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}; |