1 /*
2 * Copyright (c) 2014, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package build.tools.module;
27
28 import javax.xml.namespace.QName;
29 import javax.xml.stream.XMLEventReader;
30 import javax.xml.stream.XMLInputFactory;
31 import javax.xml.stream.XMLStreamException;
32 import javax.xml.stream.events.Attribute;
33 import javax.xml.stream.events.XMLEvent;
34 import java.io.BufferedInputStream;
35 import java.io.IOException;
36 import java.io.InputStream;
37 import java.nio.file.Files;
38 import java.nio.file.Path;
39 import java.util.HashSet;
40 import java.util.Set;
41
42 public class ModulesXmlReader {
43
44 private ModulesXmlReader() {}
45
46 public static Set<Module> readModules(Path modulesXml)
47 throws XMLStreamException, IOException
48 {
49 Set<Module> modules = new HashSet<>();
50 try (InputStream in = new BufferedInputStream(Files.newInputStream(modulesXml))) {
51 Set<Module> mods = ModulesXmlReader.load(in);
52 modules.addAll(mods);
53 }
54 return modules;
55 }
56
57 private static final String MODULES = "modules";
58 private static final String MODULE = "module";
59 private static final String NAME = "name";
60 private static final String DEPEND = "depend";
61 private static final String EXPORT = "export";
62 private static final String TO = "to";
63 private static final QName REEXPORTS = new QName("re-exports");
64 private static Set<Module> load(InputStream in)
65 throws XMLStreamException, IOException
66 {
67 Set<Module> modules = new HashSet<>();
68 XMLInputFactory factory = XMLInputFactory.newInstance();
69 XMLEventReader stream = factory.createXMLEventReader(in);
70 Module.Builder mb = null;
71 String modulename = null;
72 String pkg = null;
73 Set<String> permits = new HashSet<>();
74 while (stream.hasNext()) {
75 XMLEvent event = stream.nextEvent();
76 if (event.isStartElement()) {
77 String startTag = event.asStartElement().getName().getLocalPart();
78 switch (startTag) {
79 case MODULES:
80 break;
81 case MODULE:
82 if (mb != null) {
83 throw new RuntimeException("end tag for module is missing");
84 }
85 modulename = getNextTag(stream, NAME);
86 mb = new Module.Builder();
87 mb.name(modulename);
88 break;
89 case NAME:
90 throw new RuntimeException(event.toString());
91 case DEPEND:
92 boolean reexports = false;
93 Attribute attr = event.asStartElement().getAttributeByName(REEXPORTS);
94 if (attr != null) {
95 String value = attr.getValue();
96 if (value.equals("true") || value.equals("false")) {
97 reexports = Boolean.parseBoolean(value);
98 } else {
99 throw new RuntimeException("unexpected attribute " + attr.toString());
100 }
101 }
102 mb.require(getData(stream), reexports);
103 break;
104 case EXPORT:
105 pkg = getNextTag(stream, NAME);
106 break;
107 case TO:
108 permits.add(getData(stream));
109 break;
110 default:
111 }
112 } else if (event.isEndElement()) {
113 String endTag = event.asEndElement().getName().getLocalPart();
114 switch (endTag) {
115 case MODULE:
116 modules.add(mb.build());
117 mb = null;
118 break;
119 case EXPORT:
120 if (pkg == null) {
121 throw new RuntimeException("export-to is malformed");
122 }
123 mb.exportTo(pkg, permits);
124 pkg = null;
125 permits.clear();
126 break;
127 default:
128 }
129 } else if (event.isCharacters()) {
130 String s = event.asCharacters().getData();
131 if (!s.trim().isEmpty()) {
132 throw new RuntimeException("export-to is malformed");
133 }
134 }
135 }
136 return modules;
137 }
138
139 private static String getData(XMLEventReader reader)
140 throws XMLStreamException
141 {
142 XMLEvent e = reader.nextEvent();
143 if (e.isCharacters())
144 return e.asCharacters().getData();
145
146 throw new RuntimeException(e.toString());
147 }
148
149 private static String getNextTag(XMLEventReader reader, String tag)
150 throws XMLStreamException
151 {
152 XMLEvent e = reader.nextTag();
153 if (e.isStartElement()) {
154 String t = e.asStartElement().getName().getLocalPart();
155 if (!tag.equals(t)) {
156 throw new RuntimeException(e + " expected: " + tag);
157 }
158 return getData(reader);
159 }
160 throw new RuntimeException("export-to name is missing:" + e);
161 }
162 }