| /* |
| * Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_UTILITIES_XMLSTREAM_HPP |
| #define SHARE_VM_UTILITIES_XMLSTREAM_HPP |
| |
| #include "runtime/handles.hpp" |
| #include "utilities/ostream.hpp" |
| |
| class xmlStream; |
| class defaultStream; |
| |
| // Sub-stream for writing quoted text, as opposed to markup. |
| // Characters written to this stream are subject to quoting, |
| // as '<' => "<", etc. |
| class xmlTextStream : public outputStream { |
| friend class xmlStream; |
| friend class defaultStream; // tty |
| private: |
| |
| xmlStream* _outer_xmlStream; |
| |
| xmlTextStream() { _outer_xmlStream = NULL; } |
| |
| public: |
| virtual void flush(); // _outer.flush(); |
| virtual void write(const char* str, size_t len); // _outer->write_text() |
| }; |
| |
| |
| // Output stream for writing XML-structured logs. |
| // To write markup, use special calls elem, head/tail, etc. |
| // Use the xmlStream::text() stream to write unmarked text. |
| // Text written that way will be quoted as necessary using '<', etc. |
| // Characters written directly to an xmlStream via print_cr, etc., |
| // are directly written to the encapsulated stream, xmlStream::out(). |
| // This can be used to produce markup directly, character by character. |
| // (Such writes are not checked for markup syntax errors.) |
| |
| class xmlStream : public outputStream { |
| friend class defaultStream; // tty |
| public: |
| enum MarkupState { BODY, // after end_head() call, in text |
| HEAD, // after begin_head() call, in attrs |
| ELEM }; // after begin_elem() call, in attrs |
| |
| protected: |
| outputStream* _out; // file stream by which it goes |
| julong _last_flush; // last position of flush |
| MarkupState _markup_state; // where in the elem/head/tail dance |
| outputStream* _text; // text stream |
| xmlTextStream _text_init; |
| |
| // for subclasses |
| xmlStream() {} |
| void initialize(outputStream* out); |
| |
| // protect this from public use: |
| outputStream* out() { return _out; } |
| |
| // helpers for writing XML elements |
| void va_tag(bool push, const char* format, va_list ap) ATTRIBUTE_PRINTF(3, 0); |
| virtual void see_tag(const char* tag, bool push) NOT_DEBUG({}); |
| virtual void pop_tag(const char* tag) NOT_DEBUG({}); |
| |
| #ifdef ASSERT |
| // in debug mode, we verify matching of opening and closing tags |
| int _element_depth; // number of unfinished elements |
| char* _element_close_stack_high; // upper limit of down-growing stack |
| char* _element_close_stack_low; // upper limit of down-growing stack |
| char* _element_close_stack_ptr; // pointer of down-growing stack |
| #endif |
| |
| public: |
| // creation |
| xmlStream(outputStream* out) { initialize(out); } |
| DEBUG_ONLY(virtual ~xmlStream();) |
| |
| bool is_open() { return _out != NULL; } |
| |
| // text output |
| bool inside_attrs() { return _markup_state != BODY; } |
| |
| // flushing |
| virtual void flush(); // flushes out, sets _last_flush = count() |
| virtual void write(const char* s, size_t len); |
| void write_text(const char* s, size_t len); // used by xmlTextStream |
| int unflushed_count() { return (int)(out()->count() - _last_flush); } |
| |
| // writing complete XML elements |
| void elem(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); |
| void begin_elem(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); |
| void end_elem(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); |
| void end_elem(); |
| void head(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); |
| void begin_head(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); |
| void end_head(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); |
| void end_head(); |
| void done(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); // xxx_done event, plus tail |
| void done_raw(const char * kind); |
| void tail(const char* kind); |
| |
| // va_list versions |
| void va_elem(const char* format, va_list ap) ATTRIBUTE_PRINTF(2, 0); |
| void va_begin_elem(const char* format, va_list ap) ATTRIBUTE_PRINTF(2, 0); |
| void va_head(const char* format, va_list ap) ATTRIBUTE_PRINTF(2, 0); |
| void va_begin_head(const char* format, va_list ap) ATTRIBUTE_PRINTF(2, 0); |
| void va_done(const char* format, va_list ap) ATTRIBUTE_PRINTF(2, 0); |
| |
| // write text (with quoting of special XML characters <>&'" etc.) |
| outputStream* text() { return _text; } |
| void text(const char* format, ...) ATTRIBUTE_PRINTF(2, 3); |
| void va_text(const char* format, va_list ap) ATTRIBUTE_PRINTF(2, 0) { |
| text()->vprint(format, ap); |
| } |
| |
| // commonly used XML attributes |
| void stamp(); // stamp='1.234' |
| void method(methodHandle m); // method='k n s' ... |
| void klass(KlassHandle k); // klass='name' |
| void name(const Symbol* s); // name='name' |
| void object(const char* attr, Metadata* val); |
| void object(const char* attr, Handle val); |
| |
| // print the text alone (sans ''): |
| void method_text(methodHandle m); |
| void klass_text(KlassHandle k); // klass='name' |
| void name_text(const Symbol* s); // name='name' |
| void object_text(Metadata* x); |
| void object_text(Handle x); |
| |
| /* Example uses: |
| |
| // Empty element, simple case. |
| elem("X Y='Z'"); <X Y='Z'/> \n |
| |
| // Empty element, general case. |
| begin_elem("X Y='Z'"); <X Y='Z' |
| ...attrs... ...attrs... |
| end_elem(); /> |
| |
| // Compound element, simple case. |
| head("X Y='Z'"); <X Y='Z'> \n |
| ...body... ...body... |
| tail("X"); </X> \n |
| |
| // Compound element, general case. |
| begin_head("X Y='Z'"); <X Y='Z' |
| ...attrs... ...attrs... |
| end_head(); > \n |
| ...body... ...body... |
| tail("X"); </X> \n |
| |
| // Printf-style formatting: |
| elem("X Y='%s'", "Z"); <X Y='Z'/> \n |
| |
| */ |
| |
| }; |
| |
| // Standard log file, null if no logging is happening. |
| extern xmlStream* xtty; |
| |
| // Note: If ::xtty != NULL, ::tty == ::xtty->text(). |
| |
| #endif // SHARE_VM_UTILITIES_XMLSTREAM_HPP |