ManifestClassGenerator.cpp revision d5083f6f6b9bc76bbe64052bcec639eee752a321 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "java/ManifestClassGenerator.h"
18
19#include <algorithm>
20
21#include "Source.h"
22#include "java/AnnotationProcessor.h"
23#include "java/ClassDefinition.h"
24#include "util/Maybe.h"
25#include "xml/XmlDom.h"
26
27using android::StringPiece;
28
29namespace aapt {
30
31static Maybe<StringPiece> ExtractJavaIdentifier(IDiagnostics* diag,
32                                                const Source& source,
33                                                const StringPiece& value) {
34  const StringPiece sep = ".";
35  auto iter = std::find_end(value.begin(), value.end(), sep.begin(), sep.end());
36
37  StringPiece result;
38  if (iter != value.end()) {
39    result.assign(iter + sep.size(), value.end() - (iter + sep.size()));
40  } else {
41    result = value;
42  }
43
44  if (result.empty()) {
45    diag->Error(DiagMessage(source) << "empty symbol");
46    return {};
47  }
48
49  iter = util::FindNonAlphaNumericAndNotInSet(result, "_");
50  if (iter != result.end()) {
51    diag->Error(DiagMessage(source) << "invalid character '"
52                                    << StringPiece(iter, 1) << "' in '"
53                                    << result << "'");
54    return {};
55  }
56
57  if (*result.begin() >= '0' && *result.begin() <= '9') {
58    diag->Error(DiagMessage(source) << "symbol can not start with a digit");
59    return {};
60  }
61
62  return result;
63}
64
65static bool WriteSymbol(const Source& source, IDiagnostics* diag,
66                        xml::Element* el, ClassDefinition* class_def) {
67  xml::Attribute* attr = el->FindAttribute(xml::kSchemaAndroid, "name");
68  if (!attr) {
69    diag->Error(DiagMessage(source) << "<" << el->name
70                                    << "> must define 'android:name'");
71    return false;
72  }
73
74  Maybe<StringPiece> result = ExtractJavaIdentifier(
75      diag, source.WithLine(el->line_number), attr->value);
76  if (!result) {
77    return false;
78  }
79
80  std::unique_ptr<StringMember> string_member =
81      util::make_unique<StringMember>(result.value(), attr->value);
82  string_member->GetCommentBuilder()->AppendComment(el->comment);
83
84  class_def->AddMember(std::move(string_member));
85  return true;
86}
87
88std::unique_ptr<ClassDefinition> GenerateManifestClass(IDiagnostics* diag,
89                                                       xml::XmlResource* res) {
90  xml::Element* el = xml::FindRootElement(res->root.get());
91  if (!el) {
92    diag->Error(DiagMessage(res->file.source) << "no root tag defined");
93    return {};
94  }
95
96  if (el->name != "manifest" && !el->namespace_uri.empty()) {
97    diag->Error(DiagMessage(res->file.source)
98                << "no <manifest> root tag defined");
99    return {};
100  }
101
102  std::unique_ptr<ClassDefinition> permission_class =
103      util::make_unique<ClassDefinition>("permission", ClassQualifier::Static,
104                                         false);
105  std::unique_ptr<ClassDefinition> permission_group_class =
106      util::make_unique<ClassDefinition>("permission_group",
107                                         ClassQualifier::Static, false);
108
109  bool error = false;
110  std::vector<xml::Element*> children = el->GetChildElements();
111  for (xml::Element* child_el : children) {
112    if (child_el->namespace_uri.empty()) {
113      if (child_el->name == "permission") {
114        error |= !WriteSymbol(res->file.source, diag, child_el,
115                              permission_class.get());
116      } else if (child_el->name == "permission-group") {
117        error |= !WriteSymbol(res->file.source, diag, child_el,
118                              permission_group_class.get());
119      }
120    }
121  }
122
123  if (error) {
124    return {};
125  }
126
127  std::unique_ptr<ClassDefinition> manifest_class =
128      util::make_unique<ClassDefinition>("Manifest", ClassQualifier::None,
129                                         false);
130  manifest_class->AddMember(std::move(permission_class));
131  manifest_class->AddMember(std::move(permission_group_class));
132  return manifest_class;
133}
134
135}  // namespace aapt
136