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 package com.sun.tools.jdeps;
26
27 import java.io.IOException;
28 import java.io.InputStream;
29 import java.util.HashSet;
30 import java.util.Set;
31 import javax.xml.namespace.QName;
32 import javax.xml.stream.XMLEventReader;
33 import javax.xml.stream.XMLInputFactory;
34 import javax.xml.stream.XMLStreamException;
35 import javax.xml.stream.events.Attribute;
36 import javax.xml.stream.events.XMLEvent;
37 import com.sun.tools.jdeps.ClassFileReader.ModuleClassReader;
38 import com.sun.tools.jdeps.PlatformClassPath.ImageHelper;
39
40 final class ModulesXmlReader {
41 public static Set<Module> load(ImageHelper helper,InputStream in)
42 throws IOException
43 {
44 try {
45 ModulesXmlReader reader = new ModulesXmlReader(helper);
46 return reader.load(in);
47 } catch (XMLStreamException e) {
48 throw new RuntimeException(e);
49 }
50 }
51
52 private static final String MODULES = "modules";
53 private static final String MODULE = "module";
54 private static final String NAME = "name";
55 private static final String DEPEND = "depend";
56 private static final String EXPORT = "export";
57 private static final String TO = "to";
58 private static final QName REEXPORTS = new QName("re-exports");
59 private final ImageHelper helper;
60 ModulesXmlReader(ImageHelper helper) {
61 this.helper = helper;
62 }
63
64 public Set<Module> load(InputStream in) throws XMLStreamException, IOException {
65 Set<Module> modules = new HashSet<>();
66 if (in == null) {
67 throw new RuntimeException("jdeps-modules.xml doesn't exist");
68 }
69 XMLInputFactory factory = XMLInputFactory.newInstance();
70 XMLEventReader reader = factory.createXMLEventReader(in, "UTF-8");
71 Module.Builder mb = null;
72 String modulename = null;
73 String exportedPackage = null;
74 Set<String> permits = new HashSet<>();
75 while (reader.hasNext()) {
76 XMLEvent event = reader.nextEvent();
77 if (event.isStartElement()) {
78 String startTag = event.asStartElement().getName().getLocalPart();
79 switch (startTag) {
80 case MODULES:
81 break;
82 case MODULE:
83 if (mb != null) {
84 throw new RuntimeException("end tag for module is missing");
85 }
86 modulename = getNextTag(reader, NAME);
87 mb = new Module.Builder();
88 mb.name(modulename);
89 break;
90 case NAME:
91 throw new RuntimeException(event.toString());
92 case DEPEND:
93 boolean reexports = false;
94 Attribute attr = event.asStartElement().getAttributeByName(REEXPORTS);
95 if (attr != null) {
96 String value = attr.getValue();
97 if (value.equals("true") || value.equals("false")) {
98 reexports = Boolean.parseBoolean(value);
99 } else {
100 throw new RuntimeException("unexpected attribute " + attr.toString());
101 }
102 }
103 mb.require(getData(reader), reexports);
104 break;
105 case EXPORT:
106 exportedPackage = getNextTag(reader, NAME);
107 break;
108 case TO:
109 permits.add(getData(reader));
110 break;
111 default:
112 throw new RuntimeException("invalid element: " + event);
113 }
114 } else if (event.isEndElement()) {
115 String endTag = event.asEndElement().getName().getLocalPart();
116 switch (endTag) {
117 case MODULE:
118 ModuleClassReader cfr = helper.getModuleClassReader(modulename);
119 mb.classes(cfr);
120 mb.packages(cfr.packages());
121 modules.add(mb.build());
122 mb = null;
123 break;
124 case EXPORT:
125 if (exportedPackage == null) {
126 throw new RuntimeException("export's name is missing");
127 }
128 mb.export(exportedPackage, permits);
129 exportedPackage = null;
130 permits.clear();
131 break;
132 default:
133 }
134 } else if (event.isCharacters()) {
135 String s = event.asCharacters().getData();
136 if (!s.trim().isEmpty()) {
137 throw new RuntimeException("export-to is malformed");
138 }
139 }
140 }
141 return modules;
142 }
143 private String getData(XMLEventReader reader) throws XMLStreamException {
144 XMLEvent e = reader.nextEvent();
145 if (e.isCharacters()) {
146 return e.asCharacters().getData();
147 }
148 throw new RuntimeException(e.toString());
149 }
150
151 private String getNextTag(XMLEventReader reader, String tag) throws XMLStreamException {
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 }