1/*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "talk/xmllite/xmlbuilder.h"
29
30#include <vector>
31#include <set>
32#include "talk/base/common.h"
33#include "talk/xmllite/xmlconstants.h"
34#include "talk/xmllite/xmlelement.h"
35
36namespace buzz {
37
38XmlBuilder::XmlBuilder() :
39  pelCurrent_(NULL),
40  pelRoot_(),
41  pvParents_(new std::vector<XmlElement *>()) {
42}
43
44void
45XmlBuilder::Reset() {
46  pelRoot_.reset();
47  pelCurrent_ = NULL;
48  pvParents_->clear();
49}
50
51XmlElement *
52XmlBuilder::BuildElement(XmlParseContext * pctx,
53                              const char * name, const char ** atts) {
54  QName tagName(pctx->ResolveQName(name, false));
55  if (tagName.IsEmpty())
56    return NULL;
57
58  XmlElement * pelNew = new XmlElement(tagName);
59
60  if (!*atts)
61    return pelNew;
62
63  std::set<QName> seenNonlocalAtts;
64
65  while (*atts) {
66    QName attName(pctx->ResolveQName(*atts, true));
67    if (attName.IsEmpty()) {
68      delete pelNew;
69      return NULL;
70    }
71
72    // verify that namespaced names are unique
73    if (!attName.Namespace().empty()) {
74      if (seenNonlocalAtts.count(attName)) {
75        delete pelNew;
76        return NULL;
77      }
78      seenNonlocalAtts.insert(attName);
79    }
80
81    pelNew->AddAttr(attName, std::string(*(atts + 1)));
82    atts += 2;
83  }
84
85  return pelNew;
86}
87
88void
89XmlBuilder::StartElement(XmlParseContext * pctx,
90                              const char * name, const char ** atts) {
91  XmlElement * pelNew = BuildElement(pctx, name, atts);
92  if (pelNew == NULL) {
93    pctx->RaiseError(XML_ERROR_SYNTAX);
94    return;
95  }
96
97  if (!pelCurrent_) {
98    pelCurrent_ = pelNew;
99    pelRoot_.reset(pelNew);
100    pvParents_->push_back(NULL);
101  } else {
102    pelCurrent_->AddElement(pelNew);
103    pvParents_->push_back(pelCurrent_);
104    pelCurrent_ = pelNew;
105  }
106}
107
108void
109XmlBuilder::EndElement(XmlParseContext * pctx, const char * name) {
110  UNUSED(pctx);
111  UNUSED(name);
112  pelCurrent_ = pvParents_->back();
113  pvParents_->pop_back();
114}
115
116void
117XmlBuilder::CharacterData(XmlParseContext * pctx,
118                               const char * text, int len) {
119  UNUSED(pctx);
120  if (pelCurrent_) {
121    pelCurrent_->AddParsedText(text, len);
122  }
123}
124
125void
126XmlBuilder::Error(XmlParseContext * pctx, XML_Error err) {
127  UNUSED(pctx);
128  UNUSED(err);
129  pelRoot_.reset(NULL);
130  pelCurrent_ = NULL;
131  pvParents_->clear();
132}
133
134XmlElement *
135XmlBuilder::CreateElement() {
136  return pelRoot_.release();
137}
138
139XmlElement *
140XmlBuilder::BuiltElement() {
141  return pelRoot_.get();
142}
143
144XmlBuilder::~XmlBuilder() {
145}
146
147}  // namespace buzz
148