JDK14/Java14源码在线阅读
/*
* Copyright (c) 2012, 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.
*
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package com.sun.tools.sjavac;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.net.URI;
import java.nio.file.NoSuchFileException;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import com.sun.tools.sjavac.comp.CompilationService;
import com.sun.tools.sjavac.options.Options;
import com.sun.tools.sjavac.pubapi.PubApi;
/**
* The javac state class maintains the previous (prev) and the current (now)
* build states and everything else that goes into the javac_state file.
*
* <p><b>This is NOT part of any supported API.
* If you write code that depends on this, you do so at your own risk.
* This code and its internal interfaces are subject to change or
* deletion without notice.</b>
*/
public class JavacState {
// The arguments to the compile. If not identical, then it cannot
// be an incremental build!
String theArgs;
// The number of cores limits how many threads are used for heavy concurrent work.
int numCores;
// The bin_dir/javac_state
private File javacState;
// The previous build state is loaded from javac_state
private BuildState prev;
// The current build state is constructed during the build,
// then saved as the new javac_state.
private BuildState now;
// Something has changed in the javac_state. It needs to be saved!
private boolean needsSaving;
// If this is a new javac_state file, then do not print unnecessary messages.
private boolean newJavacState;
// These are packages where something has changed and the package
// needs to be recompiled. Actions that trigger recompilation:
// * source belonging to the package has changed
// * artifact belonging to the package is lost, or its timestamp has been changed.
// * an unknown artifact has appeared, we simply delete it, but we also trigger a recompilation.
// * a package that is tainted, taints all packages that depend on it.
private Set<String> taintedPackages;
// After a compile, the pubapis are compared with the pubapis stored in the javac state file.
// Any packages where the pubapi differ are added to this set.
// Later we use this set and the dependency information to taint dependent packages.
private Set<String> packagesWithChangedPublicApis;
// When a module-info.java file is changed, taint the module,
// then taint all modules that depend on that that module.
// A module dependency can occur directly through a require, or
// indirectly through a module that does a public export for the first tainted module.
// When all modules are tainted, then taint all packages belonging to these modules.
// Then rebuild. It is perhaps possible (and valuable?) to do a more finegrained examination of the
// change in module-info.java, but that will have to wait.
private Set<String> taintedModules;
// The set of all packages that has been recompiled.
// Copy over the javac_state for the packages that did not need recompilation,
// verbatim from the previous (prev) to the new (now) build state.
private Set<String> recompiledPackages;
// The output directories filled with tasty artifacts.
private File binDir, gensrcDir, headerDir, stateDir;
// The current status of the file system.
private Set<File> binArtifacts;
private Set<File> gensrcArtifacts;
private Set<File> headerArtifacts;
// The status of the sources.
Set<Source> removedSources = null;
Set<Source> addedSources = null;
Set<Source> modifiedSources = null;
// Visible sources for linking. These are the only
// ones that -sourcepath is allowed to see.
Set<URI> visibleSrcs;
// Setup transform that always exist.
private CompileJavaPackages compileJavaPackages = new CompileJavaPackages();
// Command line options.
private Options options;
JavacState(Options op, boolean removeJavacState) {
options = op;
numCores = options.getNumCores();
theArgs = options.getStateArgsString();
binDir = Util.pathToFile(options.getDestDir());
gensrcDir = Util.pathToFile(options.getGenSrcDir());
headerDir = Util.pathToFile(options.getHeaderDir());
stateDir = Util.pathToFile(options.getStateDir());
javacState = new File(stateDir, "javac_state");
if (removeJavacState && javacState.exists()) {
javacState.delete();
}
newJavacState = false;
if (!javacState.exists()) {
newJavacState = true;
// If there is no javac_state then delete the contents of all the artifact dirs!
// We do not want to risk building a broken incremental build.
// BUT since the makefiles still copy things straight into the bin_dir et al,
// we avoid deleting files here, if the option --permit-unidentified-classes was supplied.
if (!options.areUnidentifiedArtifactsPermitted()) {
deleteContents(binDir);
deleteContents(gensrcDir);
deleteContents(headerDir);
}
needsSaving = true;
}
prev = new BuildState();
now = new BuildState();
taintedPackages = new HashSet<>();
recompiledPackages = new HashSet<>();
packagesWithChangedPublicApis = new HashSet<>();
}
public BuildState prev() { return prev; }
public BuildState now() { return now; }
/**
* Remove args not affecting the state.
*/
static String[] removeArgsNotAffectingState(String[] args) {
String[] out = new String[args.length];
int j = 0;
for (int i = 0; i<args.length; ++i) {
if (args[i].equals("-j")) {
// Just skip it and skip following value
i++;
} else if (args[i].startsWith("--server:")) {
// Just skip it.
} else if (args[i].startsWith("--log=")) {
// Just skip it.
} else if (args[i].equals("--compare-found-sources")) {
// Just skip it and skip verify file name
i++;
} else {
// Copy argument.
out[j] = args[i];
j++;
}
}
String[] ret = new String[j];
System.arraycopy(out, 0, ret, 0, j);
return ret;
}
/**
* Specify which sources are visible to the compiler through -sourcepath.
*/
public void setVisibleSources(Map<String,Source> vs) {
visibleSrcs = new HashSet<>();
for (String s : vs.keySet()) {
Source src = vs.get(s);
visibleSrcs.add(src.file().toURI());
}
}
/**
* Returns true if this is an incremental build.
*/
public boolean isIncremental() {
return !prev.sources().isEmpty();
}
/**
* Find all artifacts that exists on disk.
*/
public void findAllArtifacts() {
binArtifacts = findAllFiles(binDir);
gensrcArtifacts = findAllFiles(gensrcDir);
headerArtifacts = findAllFiles(headerDir);
}
/**
* Lookup the artifacts generated for this package in the previous build.
*/
private Map<String,File> fetchPrevArtifacts(String pkg) {
Package p = prev.packages().get(pkg);
if (p != null) {
return p.artifacts();
}
return new HashMap<>();
}
/**
* Delete all prev artifacts in the currently tainted packages.
*/
public void deleteClassArtifactsInTaintedPackages() {
for (String pkg : taintedPackages) {
Map<String,File> arts = fetchPrevArtifacts(pkg);
for (File f : arts.values()) {
if (f.exists() && f.getName().endsWith(".class")) {
f.delete();
}
}
}
}
/**
* Mark the javac_state file to be in need of saving and as a side effect,
* it gets a new timestamp.
*/
private void needsSaving() {
needsSaving = true;
}
/**
* Save the javac_state file.
*/
public void save() throws IOException {
if (!needsSaving)
return;
try (FileWriter out = new FileWriter(javacState)) {
StringBuilder b = new StringBuilder();
long millisNow = System.currentTimeMillis();
Date d = new Date(millisNow);
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");
b.append("# javac_state ver 0.4 generated "+millisNow+" "+df.format(d)+"\n");
b.append("# This format might change at any time. Please do not depend on it.\n");
b.append("# R arguments\n");
b.append("# M module\n");
b.append("# P package\n");
b.append("# S C source_tobe_compiled timestamp\n");
b.append("# S L link_only_source timestamp\n");
b.append("# G C generated_source timestamp\n");
b.append("# A artifact timestamp\n");
b.append("# D S dependant -> source dependency\n");
b.append("# D C dependant -> classpath dependency\n");
b.append("# I pubapi\n");
b.append("R ").append(theArgs).append("\n");
// Copy over the javac_state for the packages that did not need recompilation.
now.copyPackagesExcept(prev, recompiledPackages, new HashSet<String>());
// Save the packages, ie package names, dependencies, pubapis and artifacts!
// I.e. the lot.
Module.saveModules(now.modules(), b);
String s = b.toString();
out.write(s, 0, s.length());
}
}
/**
* Load a javac_state file.
*/
public static JavacState load(Options options) {
JavacState db = new JavacState(options, false);
Module lastModule = null;
Package lastPackage = null;
Source lastSource = null;
boolean noFileFound = false;
boolean foundCorrectVerNr = false;
boolean newCommandLine = false;
boolean syntaxError = false;
Log.debug("Loading javac state file: " + db.javacState);
try (BufferedReader in = new BufferedReader(new FileReader(db.javacState))) {
for (;;) {
String l = in.readLine();
if (l==null) break;
if (l.length()>=3 && l.charAt(1) == ' ') {
char c = l.charAt(0);
if (c == 'M') {
lastModule = db.prev.loadModule(l);
} else
if (c == 'P') {
if (lastModule == null) { syntaxError = true; break; }
lastPackage = db.prev.loadPackage(lastModule, l);
} else
if (c == 'D') {
if (lastModule == null || lastPackage == null) { syntaxError = true; break; }
char depType = l.charAt(2);
if (depType != 'S' && depType != 'C')
throw new RuntimeException("Bad dependency string: " + l);
lastPackage.parseAndAddDependency(l.substring(4), depType == 'C');
} else
if (c == 'I') {
if (lastModule == null || lastPackage == null) { syntaxError = true; break; }
lastPackage.getPubApi().appendItem(l.substring(2)); // Strip "I "
} else
if (c == 'A') {
if (lastModule == null || lastPackage == null) { syntaxError = true; break; }
lastPackage.loadArtifact(l);
} else
if (c == 'S') {
if (lastModule == null || lastPackage == null) { syntaxError = true; break; }
lastSource = db.prev.loadSource(lastPackage, l, false);
} else
if (c == 'G') {
if (lastModule == null || lastPackage == null) { syntaxError = true; break; }
lastSource = db.prev.loadSource(lastPackage, l, true);
} else
if (c == 'R') {
String ncmdl = "R "+db.theArgs;
if (!l.equals(ncmdl)) {
newCommandLine = true;
}
} else
if (c == '#') {
if (l.startsWith("# javac_state ver ")) {
int sp = l.indexOf(" ", 18);
if (sp != -1) {
String ver = l.substring(18,sp);
if (!ver.equals("0.4")) {
break;
}
foundCorrectVerNr = true;
}
}
}
}
}
} catch (FileNotFoundException | NoSuchFileException e) {
// Silently create a new javac_state file.
noFileFound = true;
} catch (IOException e) {
Log.warn("Dropping old javac_state because of errors when reading it.");
db = new JavacState(options, true);
foundCorrectVerNr = true;
newCommandLine = false;
syntaxError = false;
}
if (foundCorrectVerNr == false && !noFileFound) {
Log.debug("Dropping old javac_state since it is of an old version.");
db = new JavacState(options, true);
} else
if (newCommandLine == true && !noFileFound) {
Log.debug("Dropping old javac_state since a new command line is used!");
db = new JavacState(options, true);
} else
if (syntaxError == true) {
Log.warn("Dropping old javac_state since it contains syntax errors.");
db = new JavacState(options, true);
}
db.prev.calculateDependents();
return db;
}
/**
* Mark a java package as tainted, ie it needs recompilation.
*/
public void taintPackage(String name, String because) {
if (!taintedPackages.contains(name)) {
if (because != null) Log.debug("Tainting "+Util.justPackageName(name)+" because "+because);
// It has not been tainted before.
taintedPackages.add(name);
needsSaving();
Package nowp = now.packages().get(name);
if (nowp != null) {
for (String d : nowp.dependents()) {
taintPackage(d, because);
}
}
}
}
/**
* This packages need recompilation.
*/
public Set<String> taintedPackages() {
return taintedPackages;
}
/**
* Clean out the tainted package set, used after the first round of compiles,
* prior to propagating dependencies.
*/
public void clearTaintedPackages() {
taintedPackages = new HashSet<>();
}
/**
* Go through all sources and check which have been removed, added or modified
* and taint the corresponding packages.
*/
public void checkSourceStatus(boolean check_gensrc) {
removedSources = calculateRemovedSources();
for (Source s : removedSources) {
if (!s.isGenerated() || check_gensrc) {
taintPackage(s.pkg().name(), "source "+s.name()+" was removed");
}
}
addedSources = calculateAddedSources();
for (Source s : addedSources) {
String msg = null;
if (isIncremental()) {
// When building from scratch, there is no point
// printing "was added" for every file since all files are added.
// However for an incremental build it makes sense.
msg = "source "+s.name()+" was added";
}
if (!s.isGenerated() || check_gensrc) {
taintPackage(s.pkg().name(), msg);
}
}
modifiedSources = calculateModifiedSources();
for (Source s : modifiedSources) {
if (!s.isGenerated() || check_gensrc) {
taintPackage(s.pkg().name(), "source "+s.name()+" was modified");
}
}
}
/**
* Acquire the compile_java_packages suffix rule for .java files.
*/
public Map<String,Transformer> getJavaSuffixRule() {
Map<String,Transformer> sr = new HashMap<>();
sr.put(".java", compileJavaPackages);
return sr;
}
/**
* If artifacts have gone missing, force a recompile of the packages
* they belong to.
*/
public void taintPackagesThatMissArtifacts() {
for (Package pkg : prev.packages().values()) {
for (File f : pkg.artifacts().values()) {
if (!f.exists()) {
// Hmm, the artifact on disk does not exist! Someone has removed it....
// Lets rebuild the package.
taintPackage(pkg.name(), ""+f+" is missing.");
}
}
}
}
/**
* Propagate recompilation through the dependency chains.
* Avoid re-tainting packages that have already been compiled.
*/
public void taintPackagesDependingOnChangedPackages(Set<String> pkgsWithChangedPubApi, Set<String> recentlyCompiled) {
// For each to-be-recompiled-candidates...
for (Package pkg : new HashSet<>(prev.packages().values())) {
// Find out what it depends upon...
Set<String> deps = pkg.typeDependencies()
.values()
.stream()
.flatMap(Collection::stream)
.collect(Collectors.toSet());
for (String dep : deps) {
String depPkg = ":" + dep.substring(0, dep.lastIndexOf('.'));
if (depPkg.equals(pkg.name()))
continue;
// Checking if that dependency has changed
if (pkgsWithChangedPubApi.contains(depPkg) && !recentlyCompiled.contains(pkg.name())) {
taintPackage(pkg.name(), "its depending on " + depPkg);
}
}
}
}
/**
* Compare the javac_state recorded public apis of packages on the classpath
* with the actual public apis on the classpath.
*/
public void taintPackagesDependingOnChangedClasspathPackages() throws IOException {
// 1. Collect fully qualified names of all interesting classpath dependencies
Set<String> fqDependencies = new HashSet<>();
for (Package pkg : prev.packages().values()) {
// Check if this package was compiled. If it's presence is recorded
// because it was on the class path and we needed to save it's
// public api, it's not a candidate for tainting.
if (pkg.sources().isEmpty())
continue;
pkg.typeClasspathDependencies().values().forEach(fqDependencies::addAll);
}
// 2. Extract the public APIs from the on disk .class files
// (Reason for doing step 1 in a separate phase is to avoid extracting
// public APIs of the same class twice.)
PubApiExtractor pubApiExtractor = new PubApiExtractor(options);
Map<String, PubApi> onDiskPubApi = new HashMap<>();
for (String cpDep : fqDependencies) {
onDiskPubApi.put(cpDep, pubApiExtractor.getPubApi(cpDep));
}
pubApiExtractor.close();
// 3. Compare them with the public APIs as of last compilation (loaded from javac_state)
nextPkg:
for (Package pkg : prev.packages().values()) {
// Check if this package was compiled. If it's presence is recorded
// because it was on the class path and we needed to save it's
// public api, it's not a candidate for tainting.
if (pkg.sources().isEmpty())
continue;
Set<String> cpDepsOfThisPkg = new HashSet<>();
for (Set<String> cpDeps : pkg.typeClasspathDependencies().values())
cpDepsOfThisPkg.addAll(cpDeps);
for (String fqDep : cpDepsOfThisPkg) {
String depPkg = ":" + fqDep.substring(0, fqDep.lastIndexOf('.'));
PubApi prevPkgApi = prev.packages().get(depPkg).getPubApi();
// This PubApi directly lists the members of the class,
// i.e. [ MEMBER1, MEMBER2, ... ]
PubApi prevDepApi = prevPkgApi.types.get(fqDep).pubApi;
// In order to dive *into* the class, we need to add
// .types.get(fqDep).pubApi below.
PubApi currentDepApi = onDiskPubApi.get(fqDep).types.get(fqDep).pubApi;
if (!currentDepApi.isBackwardCompatibleWith(prevDepApi)) {
List<String> apiDiff = currentDepApi.diff(prevDepApi);
taintPackage(pkg.name(), "depends on classpath "
+ "package which has an updated package api: "
+ String.join("\n", apiDiff));
//Log.debug("========================================");
//Log.debug("------ PREV API ------------------------");
//prevDepApi.asListOfStrings().forEach(Log::debug);
//Log.debug("------ CURRENT API ---------------------");
//currentDepApi.asListOfStrings().forEach(Log::debug);
//Log.debug("========================================");
continue nextPkg;
}
}
}
}
/**
* Scan all output dirs for artifacts and remove those files (artifacts?)
* that are not recognized as such, in the javac_state file.
*/
public void removeUnidentifiedArtifacts() {
Set<File> allKnownArtifacts = new HashSet<>();
for (Package pkg : prev.packages().values()) {
for (File f : pkg.artifacts().values()) {
allKnownArtifacts.add(f);
}
}
// Do not forget about javac_state....
allKnownArtifacts.add(javacState);
for (File f : binArtifacts) {
if (!allKnownArtifacts.contains(f) &&
!options.isUnidentifiedArtifactPermitted(f.getAbsolutePath())) {
Log.debug("Removing "+f.getPath()+" since it is unknown to the javac_state.");
f.delete();
}
}
for (File f : headerArtifacts) {
if (!allKnownArtifacts.contains(f)) {
Log.debug("Removing "+f.getPath()+" since it is unknown to the javac_state.");
f.delete();
}
}
for (File f : gensrcArtifacts) {
if (!allKnownArtifacts.contains(f)) {
Log.debug("Removing "+f.getPath()+" since it is unknown to the javac_state.");
f.delete();
}
}
}
/**
* Remove artifacts that are no longer produced when compiling!
*/
public void removeSuperfluousArtifacts(Set<String> recentlyCompiled) {
// Nothing to do, if nothing was recompiled.
if (recentlyCompiled.size() == 0) return;
for (String pkg : now.packages().keySet()) {
// If this package has not been recompiled, skip the check.
if (!recentlyCompiled.contains(pkg)) continue;
Collection<File> arts = now.artifacts().values();
for (File f : fetchPrevArtifacts(pkg).values()) {
if (!arts.contains(f)) {
Log.debug("Removing "+f.getPath()+" since it is now superfluous!");
if (f.exists()) f.delete();
}
}
}
}
/**
* Return those files belonging to prev, but not now.
*/
private Set<Source> calculateRemovedSources() {
Set<Source> removed = new HashSet<>();
for (String src : prev.sources().keySet()) {
if (now.sources().get(src) == null) {
removed.add(prev.sources().get(src));
}
}
return removed;
}
/**
* Return those files belonging to now, but not prev.
*/
private Set<Source> calculateAddedSources() {
Set<Source> added = new HashSet<>();
for (String src : now.sources().keySet()) {
if (prev.sources().get(src) == null) {
added.add(now.sources().get(src));
}
}
return added;
}
/**
* Return those files where the timestamp is newer.
* If a source file timestamp suddenly is older than what is known
* about it in javac_state, then consider it modified, but print
* a warning!
*/
private Set<Source> calculateModifiedSources() {
Set<Source> modified = new HashSet<>();
for (String src : now.sources().keySet()) {
Source n = now.sources().get(src);
Source t = prev.sources().get(src);
if (prev.sources().get(src) != null) {
if (t != null) {
if (n.lastModified() > t.lastModified()) {
modified.add(n);
} else if (n.lastModified() < t.lastModified()) {
modified.add(n);
Log.warn("The source file "+n.name()+" timestamp has moved backwards in time.");
}
}
}
}
return modified;
}
/**
* Recursively delete a directory and all its contents.
*/
private void deleteContents(File dir) {
if (dir != null && dir.exists()) {
for (File f : dir.listFiles()) {
if (f.isDirectory()) {
deleteContents(f);
}
if (!options.isUnidentifiedArtifactPermitted(f.getAbsolutePath())) {
Log.debug("Removing "+f.getAbsolutePath());
f.delete();
}
}
}
}
/**
* Run the copy translator only.
*/
public void performCopying(File binDir, Map<String,Transformer> suffixRules) {
Map<String,Transformer> sr = new HashMap<>();
for (Map.Entry<String,Transformer> e : suffixRules.entrySet()) {
if (e.getValue().getClass().equals(CopyFile.class)) {
sr.put(e.getKey(), e.getValue());
}
}
perform(null, binDir, sr);
}
/**
* Run all the translators that translate into java source code.
* I.e. all translators that are not copy nor compile_java_source.
*/
public void performTranslation(File gensrcDir, Map<String,Transformer> suffixRules) {
Map<String,Transformer> sr = new HashMap<>();
for (Map.Entry<String,Transformer> e : suffixRules.entrySet()) {
Class<?> trClass = e.getValue().getClass();
if (trClass == CompileJavaPackages.class || trClass == CopyFile.class)
continue;
sr.put(e.getKey(), e.getValue());
}
perform(null, gensrcDir, sr);
}
/**
* Compile all the java sources. Return true, if it needs to be called again!
*/
public boolean performJavaCompilations(CompilationService sjavac,
Options args,
Set<String> recentlyCompiled,
boolean[] rcValue) {
Map<String,Transformer> suffixRules = new HashMap<>();
suffixRules.put(".java", compileJavaPackages);
compileJavaPackages.setExtra(args);
rcValue[0] = perform(sjavac, binDir, suffixRules);
recentlyCompiled.addAll(taintedPackages());
clearTaintedPackages();
boolean again = !packagesWithChangedPublicApis.isEmpty();
taintPackagesDependingOnChangedPackages(packagesWithChangedPublicApis, recentlyCompiled);
packagesWithChangedPublicApis = new HashSet<>();
return again && rcValue[0];
// TODO: Figure out why 'again' checks packagesWithChangedPublicAPis.
// (It shouldn't matter if packages had changed pub apis as long as no
// one depends on them. Wouldn't it make more sense to let 'again'
// depend on taintedPackages?)
}
/**
* Store the source into the set of sources belonging to the given transform.
*/
private void addFileToTransform(Map<Transformer,Map<String,Set<URI>>> gs, Transformer t, Source s) {
Map<String,Set<URI>> fs = gs.get(t);
if (fs == null) {
fs = new HashMap<>();
gs.put(t, fs);
}
Set<URI> ss = fs.get(s.pkg().name());
if (ss == null) {
ss = new HashSet<>();
fs.put(s.pkg().name(), ss);
}
ss.add(s.file().toURI());
}
/**
* For all packages, find all sources belonging to the package, group the sources
* based on their transformers and apply the transformers on each source code group.
*/
private boolean perform(CompilationService sjavac,
File outputDir,
Map<String,Transformer> suffixRules) {
boolean rc = true;
// Group sources based on transforms. A source file can only belong to a single transform.
Map<Transformer,Map<String,Set<URI>>> groupedSources = new HashMap<>();
for (Source src : now.sources().values()) {
Transformer t = suffixRules.get(src.suffix());
if (t != null) {
if (taintedPackages.contains(src.pkg().name()) && !src.isLinkedOnly()) {
addFileToTransform(groupedSources, t, src);
}
}
}
// Go through the transforms and transform them.
for (Map.Entry<Transformer, Map<String, Set<URI>>> e : groupedSources.entrySet()) {
Transformer t = e.getKey();
Map<String, Set<URI>> srcs = e.getValue();
// These maps need to be synchronized since multiple threads will be
// writing results into them.
Map<String, Set<URI>> packageArtifacts = Collections.synchronizedMap(new HashMap<>());
Map<String, Map<String, Set<String>>> packageDependencies = Collections.synchronizedMap(new HashMap<>());
Map<String, Map<String, Set<String>>> packageCpDependencies = Collections.synchronizedMap(new HashMap<>());
Map<String, PubApi> packagePublicApis = Collections.synchronizedMap(new HashMap<>());
Map<String, PubApi> dependencyPublicApis = Collections.synchronizedMap(new HashMap<>());
boolean r = t.transform(sjavac,
srcs,
visibleSrcs,
prev.dependents(),
outputDir.toURI(),
packageArtifacts,
packageDependencies,
packageCpDependencies,
packagePublicApis,
dependencyPublicApis,
0,
isIncremental(),
numCores);
if (!r)
rc = false;
for (String p : srcs.keySet()) {
recompiledPackages.add(p);
}
// The transform is done! Extract all the artifacts and store the info into the Package objects.
for (Map.Entry<String, Set<URI>> a : packageArtifacts.entrySet()) {
Module mnow = now.findModuleFromPackageName(a.getKey());
mnow.addArtifacts(a.getKey(), a.getValue());
}
// Extract all the dependencies and store the info into the Package objects.
for (Map.Entry<String, Map<String, Set<String>>> a : packageDependencies.entrySet()) {
Map<String, Set<String>> deps = a.getValue();
Module mnow = now.findModuleFromPackageName(a.getKey());
mnow.setDependencies(a.getKey(), deps, false);
}
for (Map.Entry<String, Map<String, Set<String>>> a : packageCpDependencies.entrySet()) {
Map<String, Set<String>> deps = a.getValue();
Module mnow = now.findModuleFromPackageName(a.getKey());
mnow.setDependencies(a.getKey(), deps, true);
}
// This map contains the public api of the types that this
// compilation depended upon. This means that it may not contain
// full packages. In other words, we shouldn't remove knowledge of
// public apis but merge these with what we already have.
for (Map.Entry<String, PubApi> a : dependencyPublicApis.entrySet()) {
String pkg = a.getKey();
PubApi packagePartialPubApi = a.getValue();
Package pkgNow = now.findModuleFromPackageName(pkg).lookupPackage(pkg);
PubApi currentPubApi = pkgNow.getPubApi();
PubApi newPubApi = PubApi.mergeTypes(currentPubApi, packagePartialPubApi);
pkgNow.setPubapi(newPubApi);
// See JDK-8071904
if (now.packages().containsKey(pkg))
now.packages().get(pkg).setPubapi(newPubApi);
else
now.packages().put(pkg, pkgNow);
}
// The packagePublicApis cover entire packages (since sjavac compiles
// stuff on package level). This means that if a type is missing
// in the public api of a given package, it means that it has been
// removed. In other words, we should *set* the pubapi to whatever
// this map contains, and not merge it with what we already have.
for (Map.Entry<String, PubApi> a : packagePublicApis.entrySet()) {
String pkg = a.getKey();
PubApi newPubApi = a.getValue();
Module mprev = prev.findModuleFromPackageName(pkg);
Module mnow = now.findModuleFromPackageName(pkg);
mnow.setPubapi(pkg, newPubApi);
if (mprev.hasPubapiChanged(pkg, newPubApi)) {
// Aha! The pubapi of this package has changed!
// It can also be a new compile from scratch.
if (mprev.lookupPackage(pkg).existsInJavacState()) {
// This is an incremental compile! The pubapi
// did change. Trigger recompilation of dependents.
packagesWithChangedPublicApis.add(pkg);
Log.debug("The API of " + Util.justPackageName(pkg) + " has changed!");
}
}
}
}
return rc;
}
/**
/**代码未完, 请加载全部代码(NowJava.com).**/
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