langtools/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModulesXmlReader.java
changeset 30846 2b3f379840f0
parent 27579 d1a63c99cdd5
child 34752 9c262a013456
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModulesXmlReader.java	Wed May 27 13:25:18 2015 -0700
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+package com.sun.tools.jdeps;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashSet;
+import java.util.Set;
+import javax.xml.namespace.QName;
+import javax.xml.stream.XMLEventReader;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.events.Attribute;
+import javax.xml.stream.events.XMLEvent;
+import com.sun.tools.jdeps.ClassFileReader.ModuleClassReader;
+import com.sun.tools.jdeps.PlatformClassPath.ImageHelper;
+
+final class ModulesXmlReader {
+    public static Set<Module> load(ImageHelper helper,InputStream in)
+        throws IOException
+    {
+        try {
+            ModulesXmlReader reader = new ModulesXmlReader(helper);
+            return reader.load(in);
+        } catch (XMLStreamException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static final String MODULES   = "modules";
+    private static final String MODULE    = "module";
+    private static final String NAME      = "name";
+    private static final String DEPEND    = "depend";
+    private static final String EXPORT    = "export";
+    private static final String TO        = "to";
+    private static final QName  REEXPORTS = new QName("re-exports");
+    private final ImageHelper helper;
+    ModulesXmlReader(ImageHelper helper) {
+        this.helper = helper;
+    }
+
+    public Set<Module> load(InputStream in) throws XMLStreamException, IOException {
+        Set<Module> modules = new HashSet<>();
+        if (in == null) {
+            throw new RuntimeException("jdeps-modules.xml doesn't exist");
+        }
+        XMLInputFactory factory = XMLInputFactory.newInstance();
+        XMLEventReader reader = factory.createXMLEventReader(in, "UTF-8");
+        Module.Builder mb = null;
+        String modulename = null;
+        String exportedPackage = null;
+        Set<String> permits = new HashSet<>();
+        while (reader.hasNext()) {
+            XMLEvent event = reader.nextEvent();
+            if (event.isStartElement()) {
+                String startTag = event.asStartElement().getName().getLocalPart();
+                switch (startTag) {
+                    case MODULES:
+                        break;
+                    case MODULE:
+                        if (mb != null) {
+                            throw new RuntimeException("end tag for module is missing");
+                        }
+                        modulename = getNextTag(reader, NAME);
+                        mb = new Module.Builder();
+                        mb.name(modulename);
+                        break;
+                    case NAME:
+                        throw new RuntimeException(event.toString());
+                    case DEPEND:
+                        boolean reexports = false;
+                        Attribute attr = event.asStartElement().getAttributeByName(REEXPORTS);
+                        if (attr != null) {
+                            String value = attr.getValue();
+                            if (value.equals("true") || value.equals("false")) {
+                                reexports = Boolean.parseBoolean(value);
+                            } else {
+                                throw new RuntimeException("unexpected attribute " + attr.toString());
+                            }
+                        }
+                        mb.require(getData(reader), reexports);
+                        break;
+                    case EXPORT:
+                        exportedPackage = getNextTag(reader, NAME);
+                        break;
+                    case TO:
+                        permits.add(getData(reader));
+                        break;
+                    default:
+                        throw new RuntimeException("invalid element: " + event);
+                }
+            } else if (event.isEndElement()) {
+                String endTag = event.asEndElement().getName().getLocalPart();
+                switch (endTag) {
+                    case MODULE:
+                        ModuleClassReader cfr = helper.getModuleClassReader(modulename);
+                        mb.classes(cfr);
+                        mb.packages(cfr.packages());
+                        modules.add(mb.build());
+                        mb = null;
+                        break;
+                    case EXPORT:
+                        if (exportedPackage == null) {
+                            throw new RuntimeException("export's name is missing");
+                        }
+                        mb.export(exportedPackage, permits);
+                        exportedPackage = null;
+                        permits.clear();
+                        break;
+                    default:
+                }
+            } else if (event.isCharacters()) {
+                String s = event.asCharacters().getData();
+                if (!s.trim().isEmpty()) {
+                    throw new RuntimeException("export-to is malformed");
+                }
+            }
+        }
+        return modules;
+    }
+    private String getData(XMLEventReader reader) throws XMLStreamException {
+        XMLEvent e = reader.nextEvent();
+        if (e.isCharacters()) {
+            return e.asCharacters().getData();
+        }
+        throw new RuntimeException(e.toString());
+    }
+
+    private String getNextTag(XMLEventReader reader, String tag) throws XMLStreamException {
+        XMLEvent e = reader.nextTag();
+        if (e.isStartElement()) {
+            String t = e.asStartElement().getName().getLocalPart();
+            if (!tag.equals(t)) {
+                throw new RuntimeException(e + " expected: " + tag);
+            }
+            return getData(reader);
+        }
+        throw new RuntimeException("export-to name is missing:" + e);
+    }
+}