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A repackaged copy of javac for Error Prone to depend on
/*
* 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 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 load(InputStream in) throws XMLStreamException, IOException {
Set 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 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);
}
}