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CreateSymbols.java
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CreateSymbols.java
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/*
* Copyright (c) 2006, 2021, 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 build.tools.symbolgenerator;
import build.tools.symbolgenerator.CreateSymbols
.ModuleHeaderDescription
.ProvidesDescription;
import build.tools.symbolgenerator.CreateSymbols
.ModuleHeaderDescription
.RequiresDescription;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.StringWriter;
import java.io.Writer;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.FileVisitResult;
import java.nio.file.FileVisitor;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.stream.Stream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.Set;
import java.util.TimeZone;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileManager.Location;
import javax.tools.JavaFileObject;
import javax.tools.JavaFileObject.Kind;
import javax.tools.StandardLocation;
import com.sun.source.util.JavacTask;
import com.sun.tools.classfile.AccessFlags;
import com.sun.tools.classfile.Annotation;
import com.sun.tools.classfile.Annotation.Annotation_element_value;
import com.sun.tools.classfile.Annotation.Array_element_value;
import com.sun.tools.classfile.Annotation.Class_element_value;
import com.sun.tools.classfile.Annotation.Enum_element_value;
import com.sun.tools.classfile.Annotation.Primitive_element_value;
import com.sun.tools.classfile.Annotation.element_value;
import com.sun.tools.classfile.Annotation.element_value_pair;
import com.sun.tools.classfile.AnnotationDefault_attribute;
import com.sun.tools.classfile.Attribute;
import com.sun.tools.classfile.Attributes;
import com.sun.tools.classfile.ClassFile;
import com.sun.tools.classfile.ClassWriter;
import com.sun.tools.classfile.ConstantPool;
import com.sun.tools.classfile.ConstantPool.CONSTANT_Class_info;
import com.sun.tools.classfile.ConstantPool.CONSTANT_Double_info;
import com.sun.tools.classfile.ConstantPool.CONSTANT_Float_info;
import com.sun.tools.classfile.ConstantPool.CONSTANT_Integer_info;
import com.sun.tools.classfile.ConstantPool.CONSTANT_Long_info;
import com.sun.tools.classfile.ConstantPool.CONSTANT_Module_info;
import com.sun.tools.classfile.ConstantPool.CONSTANT_Package_info;
import com.sun.tools.classfile.ConstantPool.CONSTANT_String_info;
import com.sun.tools.classfile.ConstantPool.CONSTANT_Utf8_info;
import com.sun.tools.classfile.ConstantPool.CPInfo;
import com.sun.tools.classfile.ConstantPool.InvalidIndex;
import com.sun.tools.classfile.ConstantPoolException;
import com.sun.tools.classfile.ConstantValue_attribute;
import com.sun.tools.classfile.Deprecated_attribute;
import com.sun.tools.classfile.Descriptor;
import com.sun.tools.classfile.Exceptions_attribute;
import com.sun.tools.classfile.Field;
import com.sun.tools.classfile.InnerClasses_attribute;
import com.sun.tools.classfile.InnerClasses_attribute.Info;
import com.sun.tools.classfile.Method;
import com.sun.tools.classfile.MethodParameters_attribute;
import com.sun.tools.classfile.ModuleResolution_attribute;
import com.sun.tools.classfile.ModuleTarget_attribute;
import com.sun.tools.classfile.Module_attribute;
import com.sun.tools.classfile.Module_attribute.ExportsEntry;
import com.sun.tools.classfile.Module_attribute.OpensEntry;
import com.sun.tools.classfile.Module_attribute.ProvidesEntry;
import com.sun.tools.classfile.Module_attribute.RequiresEntry;
import com.sun.tools.classfile.NestHost_attribute;
import com.sun.tools.classfile.NestMembers_attribute;
import com.sun.tools.classfile.PermittedSubclasses_attribute;
import com.sun.tools.classfile.Record_attribute;
import com.sun.tools.classfile.Record_attribute.ComponentInfo;
import com.sun.tools.classfile.RuntimeAnnotations_attribute;
import com.sun.tools.classfile.RuntimeInvisibleAnnotations_attribute;
import com.sun.tools.classfile.RuntimeInvisibleParameterAnnotations_attribute;
import com.sun.tools.classfile.RuntimeParameterAnnotations_attribute;
import com.sun.tools.classfile.RuntimeVisibleAnnotations_attribute;
import com.sun.tools.classfile.RuntimeVisibleParameterAnnotations_attribute;
import com.sun.tools.classfile.Signature_attribute;
import com.sun.tools.javac.api.JavacTool;
import com.sun.tools.javac.jvm.Target;
import com.sun.tools.javac.util.Assert;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.Pair;
import java.util.Optional;
/**
* A tool for processing the .sym.txt files.
*
* To add historical data for JDK N, N >= 11, do the following:
* * cd <open-jdk-checkout>/make/data/symbols
* * <jdk-N>/bin/java --add-exports jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED \
* --add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED \
* --add-exports jdk.compiler/com.sun.tools.javac.jvm=ALL-UNNAMED \
* --add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED \
* --add-modules jdk.jdeps \
* ../../../make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java \
* build-description-incremental symbols include.list
* * sanity-check the new and updates files in make/data/symbols and commit them
*
* The tools allows to:
* * convert the .sym.txt into class/sig files for ct.sym
* * in cooperation with the adjacent history Probe, construct .sym.txt files for previous platforms
* * enhance existing .sym.txt files with a a new set .sym.txt for the current platform
*
* To convert the .sym.txt files to class/sig files from ct.sym, run:
* java build.tool.symbolgenerator.CreateSymbols build-ctsym <platform-description-file> <target-directory>
*
* The <platform-description-file> is a file of this format:
* generate platforms <platform-ids-to-generate separate with ':'>
* platform version <platform-id1> files <.sym.txt files containing history data for given platform, separate with ':'>
* platform version <platform-id2> base <base-platform-id> files <.sym.txt files containing history data for given platform, separate with ':'>
*
* The content of platform "<base-platform-id>" is also automatically added to the content of
* platform "<platform-id2>", unless explicitly excluded in "<platform-id2>"'s .sym.txt files.
*
* To create the .sym.txt files, first run the history Probe for all the previous platforms:
* <jdk-N>/bin/java build.tools.symbolgenerator.Probe <classes-for-N>
*
* Where <classes-for-N> is a name of a file into which the classes from the bootclasspath of <jdk-N>
* will be written.
*
* Then create the <platform-description-file> file and the .sym.txt files like this:
* java build.tools.symbolgenerator.CreateSymbols build-description <target-directory> <path-to-a-JDK-root> <include-list-file>
* <platform-id1> <target-file-for-platform1> "<none>"
* <platform-id2> <target-file-for-platform2> <diff-against-platform2>
* <platform-id3> <target-file-for-platform3> <diff-against-platform3>
* ...
*
* The <include-list-file> is a file that specifies classes that should be included/excluded.
* Lines that start with '+' represent class or package that should be included, '-' class or package
* that should be excluded. '/' should be used as package name delimiter, packages should end with '/'.
* Several include list files may be specified, separated by File.pathSeparator.
*
* When <diff-against-platformN> is specified, the .sym.txt files for platform N will only contain
* differences between platform N and the specified platform. The first platform (denoted F further)
* that is specified should use literal value "<none>", to have all the APIs of the platform written to
* the .sym.txt files. If there is an existing platform with full .sym.txt files in the repository,
* that platform should be used as the first platform to avoid unnecessary changes to the .sym.txt
* files. The <diff-against-platformN> for platform N should be determined as follows: if N < F, then
* <diff-against-platformN> should be N + 1. If F < N, then <diff-against-platformN> should be N - 1.
* If N is a custom/specialized sub-version of another platform N', then <diff-against-platformN> should be N'.
*
* To generate the .sym.txt files for OpenJDK 7 and 8:
* <jdk-7>/bin/java build.tools.symbolgenerator.Probe OpenJDK7.classes
* <jdk-8>/bin/java build.tools.symbolgenerator.Probe OpenJDK8.classes
* java build.tools.symbolgenerator.CreateSymbols build-description make/data/symbols $TOPDIR make/data/symbols/include.list
* 8 OpenJDK8.classes '<none>'
* 7 OpenJDK7.classes 8
*
* Note: the versions are expected to be a single character.
*
*/
public class CreateSymbols {
//<editor-fold defaultstate="collapsed" desc="ct.sym construction">
/**Create sig files for ct.sym reading the classes description from the directory that contains
* {@code ctDescriptionFile}, using the file as a recipe to create the sigfiles.
*/
@SuppressWarnings("unchecked")
public void createSymbols(String ctDescriptionFileExtra, String ctDescriptionFile, String ctSymLocation,
long timestamp, String currentVersion, String systemModules) throws IOException {
LoadDescriptions data = load(ctDescriptionFileExtra != null ? Paths.get(ctDescriptionFileExtra)
: null,
Paths.get(ctDescriptionFile));
stripNonExistentAnnotations(data);
splitHeaders(data.classes);
Map<String, Map<Character, String>> package2Version2Module = new HashMap<>();
Map<String, Set<FileData>> directory2FileData = new TreeMap<>();
for (ModuleDescription md : data.modules.values()) {
for (ModuleHeaderDescription mhd : md.header) {
List<String> versionsList =
Collections.singletonList(mhd.versions);
writeModulesForVersions(directory2FileData,
md,
mhd,
versionsList);
mhd.exports.stream().forEach(pkg -> {
for (char v : mhd.versions.toCharArray()) {
package2Version2Module.computeIfAbsent(pkg, dummy -> new HashMap<>()).put(v, md.name);
}
});
}
}
for (ClassDescription classDescription : data.classes) {
Map<Character, String> version2Module = package2Version2Module.getOrDefault(classDescription.packge().replace('.', '/'), Collections.emptyMap());
for (ClassHeaderDescription header : classDescription.header) {
Set<String> jointVersions = new HashSet<>();
jointVersions.add(header.versions);
limitJointVersion(jointVersions, classDescription.fields);
limitJointVersion(jointVersions, classDescription.methods);
Map<String, StringBuilder> module2Versions = new HashMap<>();
for (char v : header.versions.toCharArray()) {
String module = version2Module.get(v);
if (module == null) {
if (v >= '9') {
throw new AssertionError("No module for " + classDescription.name +
" and version " + v);
}
module = version2Module.get('9');
if (module == null) {
module = "java.base";
}
}
module2Versions.computeIfAbsent(module, dummy -> new StringBuilder()).append(v);
}
for (Entry<String, StringBuilder> e : module2Versions.entrySet()) {
Set<String> currentVersions = new HashSet<>(jointVersions);
limitJointVersion(currentVersions, e.getValue().toString());
currentVersions = currentVersions.stream().filter(vers -> !disjoint(vers, e.getValue().toString())).collect(Collectors.toSet());
writeClassesForVersions(directory2FileData, classDescription, header, e.getKey(), currentVersions);
}
}
}
currentVersion = Integer.toString(Integer.parseInt(currentVersion), Character.MAX_RADIX);
currentVersion = currentVersion.toUpperCase(Locale.ROOT);
openDirectory(directory2FileData, currentVersion + "/")
.add(new FileData(currentVersion + "/system-modules",
Files.readAllBytes(Paths.get(systemModules))));
try (OutputStream fos = new FileOutputStream(ctSymLocation);
OutputStream bos = new BufferedOutputStream(fos);
ZipOutputStream jos = new ZipOutputStream(bos)) {
for (Entry<String, Set<FileData>> e : directory2FileData.entrySet()) {
jos.putNextEntry(createZipEntry(e.getKey(), timestamp));
for (FileData fd : e.getValue()) {
jos.putNextEntry(createZipEntry(fd.fileName, timestamp));
jos.write(fd.fileData);
}
}
}
}
private static final String PREVIEW_FEATURE_ANNOTATION_OLD =
"Ljdk/internal/PreviewFeature;";
private static final String PREVIEW_FEATURE_ANNOTATION_NEW =
"Ljdk/internal/javac/PreviewFeature;";
private static final String PREVIEW_FEATURE_ANNOTATION_INTERNAL =
"Ljdk/internal/PreviewFeature+Annotation;";
private static final String VALUE_BASED_ANNOTATION =
"Ljdk/internal/ValueBased;";
private static final String VALUE_BASED_ANNOTATION_INTERNAL =
"Ljdk/internal/ValueBased+Annotation;";
public static final Set<String> HARDCODED_ANNOTATIONS = new HashSet<>(
List.of("Ljdk/Profile+Annotation;",
"Lsun/Proprietary+Annotation;",
PREVIEW_FEATURE_ANNOTATION_OLD,
PREVIEW_FEATURE_ANNOTATION_NEW,
VALUE_BASED_ANNOTATION));
private void stripNonExistentAnnotations(LoadDescriptions data) {
Set<String> allClasses = data.classes.name2Class.keySet();
data.modules.values().forEach(mod -> {
stripNonExistentAnnotations(allClasses, mod.header);
});
data.classes.classes.forEach(clazz -> {
stripNonExistentAnnotations(allClasses, clazz.header);
stripNonExistentAnnotations(allClasses, clazz.fields);
stripNonExistentAnnotations(allClasses, clazz.methods);
});
}
private void stripNonExistentAnnotations(Set<String> allClasses, Iterable<? extends FeatureDescription> descs) {
descs.forEach(d -> stripNonExistentAnnotations(allClasses, d));
}
private void stripNonExistentAnnotations(Set<String> allClasses, FeatureDescription d) {
stripNonExistentAnnotations(allClasses, d.classAnnotations);
stripNonExistentAnnotations(allClasses, d.runtimeAnnotations);
}
private void stripNonExistentAnnotations(Set<String> allClasses, List<AnnotationDescription> annotations) {
if (annotations != null)
annotations.removeIf(ann -> !HARDCODED_ANNOTATIONS.contains(ann.annotationType) &&
!allClasses.contains(ann.annotationType.substring(1, ann.annotationType.length() - 1)));
}
private ZipEntry createZipEntry(String name, long timestamp) {
ZipEntry ze = new ZipEntry(name);
ze.setTime(timestamp);
return ze;
}
public static String EXTENSION = ".sig";
LoadDescriptions load(Path ctDescriptionWithExtraContent, Path ctDescriptionOpen) throws IOException {
Map<String, PlatformInput> platforms = new LinkedHashMap<>();
if (ctDescriptionWithExtraContent != null && Files.isRegularFile(ctDescriptionWithExtraContent)) {
try (LineBasedReader reader = new LineBasedReader(ctDescriptionWithExtraContent)) {
while (reader.hasNext()) {
switch (reader.lineKey) {
case "generate":
//ignore
reader.moveNext();
break;
case "platform":
PlatformInput platform = PlatformInput.load(ctDescriptionWithExtraContent,
reader);
platforms.put(platform.version, platform);
reader.moveNext();
break;
default:
throw new IllegalStateException("Unknown key: " + reader.lineKey);
}
}
}
}
Set<String> generatePlatforms = null;
try (LineBasedReader reader = new LineBasedReader(ctDescriptionOpen)) {
while (reader.hasNext()) {
switch (reader.lineKey) {
case "generate":
String[] platformsAttr = reader.attributes.get("platforms").split(":");
generatePlatforms = new HashSet<>(List.of(platformsAttr));
reader.moveNext();
break;
case "platform":
PlatformInput platform = PlatformInput.load(ctDescriptionOpen, reader);
if (!platforms.containsKey(platform.version))
platforms.put(platform.version, platform);
reader.moveNext();
break;
default:
throw new IllegalStateException("Unknown key: " + reader.lineKey);
}
}
}
Map<String, ClassDescription> classes = new LinkedHashMap<>();
Map<String, ModuleDescription> modules = new LinkedHashMap<>();
for (PlatformInput platform : platforms.values()) {
for (ClassDescription cd : classes.values()) {
addNewVersion(cd.header, platform.basePlatform, platform.version);
addNewVersion(cd.fields, platform.basePlatform, platform.version);
addNewVersion(cd.methods, platform.basePlatform, platform.version);
}
for (ModuleDescription md : modules.values()) {
addNewVersion(md.header, platform.basePlatform, platform.version);
}
for (String input : platform.files) {
Path inputFile = platform.ctDescription.getParent().resolve(input);
try (LineBasedReader reader = new LineBasedReader(inputFile)) {
while (reader.hasNext()) {
String nameAttr = reader.attributes.get("name");
switch (reader.lineKey) {
case "class": case "-class":
ClassDescription cd =
classes.computeIfAbsent(nameAttr,
n -> new ClassDescription());
if ("-class".equals(reader.lineKey)) {
removeVersion(cd.header, h -> true,
platform.version);
reader.moveNext();
continue;
}
cd.read(reader, platform.basePlatform,
platform.version);
break;
case "module": {
ModuleDescription md =
modules.computeIfAbsent(nameAttr,
n -> new ModuleDescription());
md.read(reader, platform.basePlatform,
platform.version);
break;
}
case "-module": {
ModuleDescription md =
modules.computeIfAbsent(nameAttr,
n -> new ModuleDescription());
removeVersion(md.header, h -> true,
platform.version);
reader.moveNext();
break;
}
}
}
}
}
}
ClassList result = new ClassList();
classes.values().forEach(result::add);
return new LoadDescriptions(result,
modules,
new ArrayList<>(platforms.values()));
}
private static void removeVersion(LoadDescriptions load, String deletePlatform) {
for (Iterator<ClassDescription> it = load.classes.iterator(); it.hasNext();) {
ClassDescription desc = it.next();
Iterator<ClassHeaderDescription> chdIt = desc.header.iterator();
while (chdIt.hasNext()) {
ClassHeaderDescription chd = chdIt.next();
chd.versions = removeVersion(chd.versions, deletePlatform);
if (chd.versions.isEmpty()) {
chdIt.remove();
}
}
if (desc.header.isEmpty()) {
it.remove();
continue;
}
Iterator<MethodDescription> methodIt = desc.methods.iterator();
while (methodIt.hasNext()) {
MethodDescription method = methodIt.next();
method.versions = removeVersion(method.versions, deletePlatform);
if (method.versions.isEmpty())
methodIt.remove();
}
Iterator<FieldDescription> fieldIt = desc.fields.iterator();
while (fieldIt.hasNext()) {
FieldDescription field = fieldIt.next();
field.versions = removeVersion(field.versions, deletePlatform);
if (field.versions.isEmpty())
fieldIt.remove();
}
}
for (Iterator<ModuleDescription> it = load.modules.values().iterator(); it.hasNext();) {
ModuleDescription desc = it.next();
Iterator<ModuleHeaderDescription> mhdIt = desc.header.iterator();
while (mhdIt.hasNext()) {
ModuleHeaderDescription mhd = mhdIt.next();
mhd.versions = removeVersion(mhd.versions, deletePlatform);
if (mhd.versions.isEmpty())
mhdIt.remove();
}
if (desc.header.isEmpty()) {
it.remove();
continue;
}
}
}
static final class LoadDescriptions {
public final ClassList classes;
public final Map<String, ModuleDescription> modules;
public final List<PlatformInput> versions;
public LoadDescriptions(ClassList classes,
Map<String, ModuleDescription> modules,
List<PlatformInput> versions) {
this.classes = classes;
this.modules = modules;
this.versions = versions;
}
}
static final class LineBasedReader implements AutoCloseable {
private final BufferedReader input;
public String lineKey;
public Map<String, String> attributes = new HashMap<>();
public LineBasedReader(Path input) throws IOException {
this.input = Files.newBufferedReader(input);
moveNext();
}
public void moveNext() throws IOException {
String line = input.readLine();
if (line == null) {
lineKey = null;
return ;
}
if (line.trim().isEmpty() || line.startsWith("#")) {
moveNext();
return ;
}
String[] parts = line.split(" ");
lineKey = parts[0];
attributes.clear();
for (int i = 1; i < parts.length; i += 2) {
attributes.put(parts[i], unquote(parts[i + 1]));
}
}
public boolean hasNext() {
return lineKey != null;
}
@Override
public void close() throws IOException {
input.close();
}
}
private static String reduce(String original, String other) {
Set<String> otherSet = new HashSet<>();
for (char v : other.toCharArray()) {
otherSet.add("" + v);
}
return reduce(original, otherSet);
}
private static String reduce(String original, Set<String> generate) {
StringBuilder sb = new StringBuilder();
for (char v : original.toCharArray()) {
if (generate.contains("" + v)) {
sb.append(v);
}
}
return sb.toString();
}
private static String removeVersion(String original, String remove) {
StringBuilder sb = new StringBuilder();
for (char v : original.toCharArray()) {
if (v != remove.charAt(0)) {
sb.append(v);
}
}
return sb.toString();
}
private static class PlatformInput {
public final String version;
public final String basePlatform;
public final List<String> files;
public final Path ctDescription;
public PlatformInput(Path ctDescription, String version, String basePlatform, List<String> files) {
this.ctDescription = ctDescription;
this.version = version;
this.basePlatform = basePlatform;
this.files = files;
}
public static PlatformInput load(Path ctDescription, LineBasedReader in) throws IOException {
return new PlatformInput(ctDescription,
in.attributes.get("version"),
in.attributes.get("base"),
List.of(in.attributes.get("files").split(":")));
}
}
static void addNewVersion(Collection<? extends FeatureDescription> features,
String baselineVersion,
String version) {
features.stream()
.filter(f -> f.versions.contains(baselineVersion))
.forEach(f -> f.versions += version);
}
static <T extends FeatureDescription> void removeVersion(Collection<T> features,
Predicate<T> shouldRemove,
String version) {
for (T existing : features) {
if (shouldRemove.test(existing) && existing.versions.endsWith(version)) {
existing.versions = existing.versions.replace(version, "");
return;
}
}
}
/**Changes to class header of an outer class (like adding a new type parameter) may affect
* its innerclasses. So if the outer class's header is different for versions A and B, need to
* split its innerclasses headers to also be different for versions A and B.
*/
static void splitHeaders(ClassList classes) {
Set<String> ctVersions = new HashSet<>();
for (ClassDescription cd : classes) {
for (ClassHeaderDescription header : cd.header) {
for (char c : header.versions.toCharArray()) {
ctVersions.add("" + c);
}
}
}
classes.sort();
for (ClassDescription cd : classes) {
Map<String, String> outerSignatures2Version = new HashMap<>();
for (String version : ctVersions) { //XXX
ClassDescription outer = cd;
String outerSignatures = "";
while ((outer = classes.enclosingClass(outer)) != null) {
for (ClassHeaderDescription outerHeader : outer.header) {
if (outerHeader.versions.contains(version)) {
outerSignatures += outerHeader.signature;
}
}
}
outerSignatures2Version.compute(outerSignatures,
(key, value) -> value != null ? value + version : version);
}
List<ClassHeaderDescription> newHeaders = new ArrayList<>();
HEADER_LOOP: for (ClassHeaderDescription header : cd.header) {
for (String versions : outerSignatures2Version.values()) {
if (containsAll(versions, header.versions)) {
newHeaders.add(header);
continue HEADER_LOOP;
}
if (disjoint(versions, header.versions)) {
continue;
}
ClassHeaderDescription newHeader = new ClassHeaderDescription();
newHeader.classAnnotations = header.classAnnotations;
newHeader.deprecated = header.deprecated;
newHeader.extendsAttr = header.extendsAttr;
newHeader.flags = header.flags;
newHeader.implementsAttr = header.implementsAttr;
newHeader.innerClasses = header.innerClasses;
newHeader.runtimeAnnotations = header.runtimeAnnotations;
newHeader.signature = header.signature;
newHeader.versions = reduce(header.versions, versions);
newHeaders.add(newHeader);
}
}
cd.header = newHeaders;
}
}
void limitJointVersion(Set<String> jointVersions, List<? extends FeatureDescription> features) {
for (FeatureDescription feature : features) {
limitJointVersion(jointVersions, feature.versions);
}
}
void limitJointVersion(Set<String> jointVersions, String versions) {
for (String version : jointVersions) {
if (!containsAll(versions, version) &&
!disjoint(versions, version)) {
StringBuilder featurePart = new StringBuilder();
StringBuilder otherPart = new StringBuilder();
for (char v : version.toCharArray()) {
if (versions.indexOf(v) != (-1)) {
featurePart.append(v);
} else {
otherPart.append(v);
}
}
jointVersions.remove(version);
if (featurePart.length() == 0 || otherPart.length() == 0) {
throw new AssertionError();
}
jointVersions.add(featurePart.toString());
jointVersions.add(otherPart.toString());
break;
}
}
}
private static boolean containsAll(String versions, String subVersions) {
for (char c : subVersions.toCharArray()) {
if (versions.indexOf(c) == (-1))
return false;
}
return true;
}
private static boolean disjoint(String version1, String version2) {
for (char c : version2.toCharArray()) {
if (version1.indexOf(c) != (-1))
return false;
}
return true;
}
void writeClassesForVersions(Map<String, Set<FileData>> directory2FileData,
ClassDescription classDescription,
ClassHeaderDescription header,
String module,
Iterable<String> versions)
throws IOException {
for (String ver : versions) {
writeClass(directory2FileData, classDescription, header, module, ver);
}
}
void writeModulesForVersions(Map<String, Set<FileData>> directory2FileData,
ModuleDescription moduleDescription,
ModuleHeaderDescription header,
Iterable<String> versions)
throws IOException {
for (String ver : versions) {
writeModule(directory2FileData, moduleDescription, header, ver);
}
}
//<editor-fold defaultstate="collapsed" desc="Class Writing">
void writeModule(Map<String, Set<FileData>> directory2FileData,
ModuleDescription moduleDescription,
ModuleHeaderDescription header,
String version) throws IOException {
List<CPInfo> constantPool = new ArrayList<>();
constantPool.add(null);
int currentClass = addClass(constantPool, "module-info");
int superclass = 0;
int[] interfaces = new int[0];
AccessFlags flags = new AccessFlags(header.flags);
Map<String, Attribute> attributesMap = new HashMap<>();
addAttributes(moduleDescription, header, constantPool, attributesMap);
Attributes attributes = new Attributes(attributesMap);
CPInfo[] cpData = constantPool.toArray(new CPInfo[constantPool.size()]);
ConstantPool cp = new ConstantPool(cpData);
ClassFile classFile = new ClassFile(0xCAFEBABE,
Target.DEFAULT.minorVersion,
Target.DEFAULT.majorVersion,
cp,
flags,
currentClass,
superclass,
interfaces,
new Field[0],
new Method[0],
attributes);
doWrite(directory2FileData, version, moduleDescription.name, "module-info" + EXTENSION, classFile);
}
void writeClass(Map<String, Set<FileData>> directory2FileData,
ClassDescription classDescription,
ClassHeaderDescription header,
String module,
String version) throws IOException {
List<CPInfo> constantPool = new ArrayList<>();
constantPool.add(null);
List<Method> methods = new ArrayList<>();
for (MethodDescription methDesc : classDescription.methods) {
if (disjoint(methDesc.versions, version))
continue;
Descriptor descriptor = new Descriptor(addString(constantPool, methDesc.descriptor));
//TODO: LinkedHashMap to avoid param annotations vs. Signature problem in javac's ClassReader:
Map<String, Attribute> attributesMap = new LinkedHashMap<>();
addAttributes(methDesc, constantPool, attributesMap);
Attributes attributes = new Attributes(attributesMap);
AccessFlags flags = new AccessFlags(methDesc.flags);
int nameString = addString(constantPool, methDesc.name);
methods.add(new Method(flags, nameString, descriptor, attributes));
}
List<Field> fields = new ArrayList<>();
for (FieldDescription fieldDesc : classDescription.fields) {
if (disjoint(fieldDesc.versions, version))
continue;
Descriptor descriptor = new Descriptor(addString(constantPool, fieldDesc.descriptor));
Map<String, Attribute> attributesMap = new HashMap<>();
addAttributes(fieldDesc, constantPool, attributesMap);
Attributes attributes = new Attributes(attributesMap);
AccessFlags flags = new AccessFlags(fieldDesc.flags);
int nameString = addString(constantPool, fieldDesc.name);
fields.add(new Field(flags, nameString, descriptor, attributes));
}
int currentClass = addClass(constantPool, classDescription.name);
int superclass = header.extendsAttr != null ? addClass(constantPool, header.extendsAttr) : 0;
int[] interfaces = new int[header.implementsAttr.size()];
int i = 0;
for (String intf : header.implementsAttr) {
interfaces[i++] = addClass(constantPool, intf);
}
AccessFlags flags = new AccessFlags(header.flags);
Map<String, Attribute> attributesMap = new HashMap<>();
addAttributes(header, constantPool, attributesMap);
Attributes attributes = new Attributes(attributesMap);
ConstantPool cp = new ConstantPool(constantPool.toArray(new CPInfo[constantPool.size()]));
ClassFile classFile = new ClassFile(0xCAFEBABE,
Target.DEFAULT.minorVersion,
Target.DEFAULT.majorVersion,
cp,
flags,
currentClass,
superclass,
interfaces,
fields.toArray(new Field[0]),
methods.toArray(new Method[0]),
attributes);
doWrite(directory2FileData, version, module, classDescription.name + EXTENSION, classFile);
}
private void doWrite(Map<String, Set<FileData>> directory2FileData,
String version,
String moduleName,
String fileName,
ClassFile classFile) throws IOException {
int lastSlash = fileName.lastIndexOf('/');
String pack = lastSlash != (-1) ? fileName.substring(0, lastSlash + 1) : "/";
String directory = version + "/" + moduleName + "/" + pack;
String fullFileName = version + "/" + moduleName + "/" + fileName;
try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
ClassWriter w = new ClassWriter();
w.write(classFile, out);
openDirectory(directory2FileData, directory)
.add(new FileData(fullFileName, out.toByteArray()));
}
}
private Set<FileData> openDirectory(Map<String, Set<FileData>> directory2FileData,
String directory) {
Comparator<FileData> fileCompare = (fd1, fd2) -> fd1.fileName.compareTo(fd2.fileName);
return directory2FileData.computeIfAbsent(directory, d -> new TreeSet<>(fileCompare));
}
private static class FileData {
public final String fileName;
public final byte[] fileData;
public FileData(String fileName, byte[] fileData) {
this.fileName = fileName;
this.fileData = fileData;
}
}
private void addAttributes(ModuleDescription md,
ModuleHeaderDescription header,
List<CPInfo> cp,
Map<String, Attribute> attributes) {
addGenericAttributes(header, cp, attributes);
if (header.moduleResolution != null) {
int attrIdx = addString(cp, Attribute.ModuleResolution);
final ModuleResolution_attribute resIdx =
new ModuleResolution_attribute(attrIdx,
header.moduleResolution);
attributes.put(Attribute.ModuleResolution, resIdx);
}
if (header.moduleTarget != null) {
int attrIdx = addString(cp, Attribute.ModuleTarget);
int targetIdx = addString(cp, header.moduleTarget);
attributes.put(Attribute.ModuleTarget,
new ModuleTarget_attribute(attrIdx, targetIdx));
}
int attrIdx = addString(cp, Attribute.Module);
attributes.put(Attribute.Module,
new Module_attribute(attrIdx,
addModuleName(cp, md.name),
0,
0,
header.requires
.stream()
.map(r -> createRequiresEntry(cp, r))
.collect(Collectors.toList())
.toArray(new RequiresEntry[0]),
header.exports
.stream()
.map(e -> createExportsEntry(cp, e))
.collect(Collectors.toList())
.toArray(new ExportsEntry[0]),
header.opens
.stream()
.map(e -> createOpensEntry(cp, e))
.collect(Collectors.toList())
.toArray(new OpensEntry[0]),
header.uses
.stream()
.mapToInt(u -> addClassName(cp, u))
.toArray(),
header.provides
.stream()
.map(p -> createProvidesEntry(cp, p))
.collect(Collectors.toList())
.toArray(new ProvidesEntry[0])));
addInnerClassesAttribute(header, cp, attributes);
}
private static RequiresEntry createRequiresEntry(List<CPInfo> cp,
RequiresDescription r) {
final int idx = addModuleName(cp, r.moduleName);
return new RequiresEntry(idx,
r.flags,
r.version != null
? addInt(cp, r.version)
: 0);
}
private static ExportsEntry createExportsEntry(List<CPInfo> cp,
String e) {
return new ExportsEntry(addPackageName(cp, e), 0, new int[0]);
}
private static OpensEntry createOpensEntry(List<CPInfo> cp, String e) {
return new OpensEntry(addPackageName(cp, e), 0, new int[0]);
}
private static ProvidesEntry createProvidesEntry(List<CPInfo> cp,
ModuleHeaderDescription.ProvidesDescription p) {
final int idx = addClassName(cp, p.interfaceName);
return new ProvidesEntry(idx, p.implNames
.stream()
.mapToInt(i -> addClassName(cp, i))
.toArray());
}
private void addAttributes(ClassHeaderDescription header,
List<CPInfo> constantPool, Map<String, Attribute> attributes) {
addGenericAttributes(header, constantPool, attributes);
if (header.nestHost != null) {
int attributeString = addString(constantPool, Attribute.NestHost);
int nestHost = addClass(constantPool, header.nestHost);
attributes.put(Attribute.NestHost,
new NestHost_attribute(attributeString, nestHost));
}