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A repackaged copy of javac for Error Prone to depend on
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/*
* Copyright (c) 2016, 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.PrintWriter;
import java.lang.module.ModuleDescriptor;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static com.sun.tools.jdeps.Analyzer.NOT_FOUND;
/**
* Analyze module dependences and any reference to JDK internal APIs.
* It can apply transition reduction on the resulting module graph.
*
* The result prints one line per module it depends on
* one line per JDK internal API package it references:
* $MODULE[/$PACKAGE]
*
*/
public class ModuleExportsAnalyzer extends DepsAnalyzer {
// source archive to its dependences and JDK internal APIs it references
private final Map>> deps = new HashMap<>();
private final boolean reduced;
private final PrintWriter writer;
public ModuleExportsAnalyzer(JdepsConfiguration config,
JdepsFilter filter,
boolean reduced,
PrintWriter writer) {
super(config, filter, null,
Analyzer.Type.PACKAGE,
false /* all classes */);
this.reduced = reduced;
this.writer = writer;
}
@Override
public boolean run() throws IOException {
// analyze dependences
boolean rc = super.run();
// A visitor to record the module-level dependences as well as
// use of JDK internal APIs
Analyzer.Visitor visitor = (origin, originArchive, target, targetArchive) -> {
Set jdkInternals =
deps.computeIfAbsent(originArchive, _k -> new HashMap<>())
.computeIfAbsent(targetArchive, _k -> new HashSet<>());
Module module = targetArchive.getModule();
if (originArchive.getModule() != module &&
module.isJDK() && !module.isExported(target)) {
// use of JDK internal APIs
jdkInternals.add(target);
}
};
// visit the dependences
archives.stream()
.filter(analyzer::hasDependences)
.sorted(Comparator.comparing(Archive::getName))
.forEach(archive -> analyzer.visitDependences(archive, visitor));
// print the dependences on named modules
printDependences();
// print the dependences on unnamed module
deps.values().stream()
.flatMap(map -> map.keySet().stream())
.filter(archive -> !archive.getModule().isNamed())
.map(archive -> archive != NOT_FOUND
? "unnamed module: " + archive.getPathName()
: archive.getPathName())
.distinct()
.sorted()
.forEach(archive -> writer.format(" %s%n", archive));
return rc;
}
private void printDependences() {
// find use of JDK internals
Map> jdkinternals = new HashMap<>();
dependenceStream()
.flatMap(map -> map.entrySet().stream())
.filter(e -> e.getValue().size() > 0)
.forEach(e -> jdkinternals.computeIfAbsent(e.getKey().getModule(),
_k -> new HashSet<>())
.addAll(e.getValue()));
// build module graph
ModuleGraphBuilder builder = new ModuleGraphBuilder(configuration);
Module root = new RootModule("root");
builder.addModule(root);
// find named module dependences
dependenceStream()
.flatMap(map -> map.keySet().stream())
.filter(m -> m.getModule().isNamed()
&& !configuration.rootModules().contains(m))
.map(Archive::getModule)
.forEach(m -> builder.addEdge(root, m));
// module dependences
Set modules = builder.build().adjacentNodes(root);
// if reduced is set, apply transition reduction
Set reducedSet;
if (reduced) {
Set nodes = builder.reduced().adjacentNodes(root);
if (nodes.size() == 1) {
// java.base only
reducedSet = nodes;
} else {
// java.base is mandated and can be excluded from the reduced graph
reducedSet = nodes.stream()
.filter(m -> !"java.base".equals(m.name()) ||
jdkinternals.containsKey("java.base"))
.collect(Collectors.toSet());
}
} else {
reducedSet = modules;
}
modules.stream()
.sorted(Comparator.comparing(Module::name))
.forEach(m -> {
if (jdkinternals.containsKey(m)) {
jdkinternals.get(m).stream()
.sorted()
.forEach(pn -> writer.format(" %s/%s%n", m, pn));
} else if (reducedSet.contains(m)){
// if the transition reduction is applied, show the reduced graph
writer.format(" %s%n", m);
}
});
}
/*
* Returns a stream of dependence map from an Archive to the set of JDK
* internal APIs being used.
*/
private Stream>> dependenceStream() {
return deps.keySet().stream()
.filter(source -> !source.getModule().isNamed()
|| configuration.rootModules().contains(source))
.map(deps::get);
}
private class RootModule extends Module {
final ModuleDescriptor descriptor;
RootModule(String name) {
super(name);
ModuleDescriptor.Builder builder = ModuleDescriptor.newModule(name);
this.descriptor = builder.build();
}
@Override
public ModuleDescriptor descriptor() {
return descriptor;
}
}
}