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Eclipse Compiler for Java(TM)
package org.eclipse.jdt.internal.compiler.batch;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.nio.file.DirectoryStream;
import java.nio.file.FileSystemAlreadyExistsException;
import java.nio.file.FileSystems;
import java.nio.file.FileVisitResult;
import java.nio.file.FileVisitor;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.zip.ZipEntry;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException;
import org.eclipse.jdt.internal.compiler.classfmt.ExternalAnnotationDecorator;
import org.eclipse.jdt.internal.compiler.env.AccessRuleSet;
import org.eclipse.jdt.internal.compiler.env.IBinaryType;
import org.eclipse.jdt.internal.compiler.env.NameEnvironmentAnswer;
import org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.ExternalAnnotationStatus;
import org.eclipse.jdt.internal.compiler.util.SuffixConstants;
import org.eclipse.jdt.internal.compiler.util.Util;
public class ClasspathMultiReleaseJar extends ClasspathJar {
private java.nio.file.FileSystem fs = null;
Path releasePath = null;
String compliance = null;
public ClasspathMultiReleaseJar(File file, boolean closeZipFileAtEnd,
AccessRuleSet accessRuleSet, String destinationPath, String compliance) {
super(file, closeZipFileAtEnd, accessRuleSet, destinationPath);
this.compliance = compliance;
}
@Override
public void initialize() throws IOException {
super.initialize();
URI t = this.file.toURI();
if (this.file.exists()) {
URI uri = URI.create("jar:file:" + t.getRawPath()); //$NON-NLS-1$
try {
HashMap env = new HashMap<>();
this.fs = FileSystems.newFileSystem(uri, env);
} catch (FileSystemAlreadyExistsException e) {
this.fs = FileSystems.getFileSystem(uri);
}
this.releasePath = this.fs.getPath("/", "META-INF", "versions", this.compliance); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
if (!Files.exists(this.releasePath)) {
this.releasePath = null;
}
}
}
@SuppressWarnings("rawtypes")
@Override
public synchronized char[][] getModulesDeclaringPackage(String qualifiedPackageName, String moduleName) {
if (this.releasePath == null) {
return super.getModulesDeclaringPackage(qualifiedPackageName, moduleName);
}
if (this.packageCache != null)
return singletonModuleNameIf(this.packageCache.contains(qualifiedPackageName));
this.packageCache = new HashSet<>(41);
this.packageCache.add(Util.EMPTY_STRING);
for (Enumeration e = this.zipFile.entries(); e.hasMoreElements(); ) {
String fileName = ((ZipEntry) e.nextElement()).getName();
addToPackageCache(fileName, false);
}
try {
if (this.releasePath != null && Files.exists(this.releasePath)) {
// go through the packages
try (DirectoryStream stream = Files.newDirectoryStream(this.releasePath)) {
for (final java.nio.file.Path subdir: stream) {
Files.walkFileTree(subdir, new FileVisitor() {
@Override
public FileVisitResult preVisitDirectory(java.nio.file.Path dir, BasicFileAttributes attrs)
throws IOException {
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult visitFile(java.nio.file.Path f, BasicFileAttributes attrs)
throws IOException {
Path p = ClasspathMultiReleaseJar.this.releasePath.relativize(f);
addToPackageCache(p.toString(), false);
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult visitFileFailed(java.nio.file.Path f, IOException exc) throws IOException {
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult postVisitDirectory(java.nio.file.Path dir, IOException exc)
throws IOException {
return FileVisitResult.CONTINUE;
}
});
}
}
}
} catch (Exception e) {
e.printStackTrace();
// move on;
}
return singletonModuleNameIf(this.packageCache.contains(qualifiedPackageName));
}
@Override
public NameEnvironmentAnswer findClass(char[] binaryFileName, String qualifiedPackageName, String moduleName, String qualifiedBinaryFileName, boolean asBinaryOnly) {
if (!isPackage(qualifiedPackageName, moduleName)) return null; // most common case
if (this.releasePath != null) {
try {
Path p = this.releasePath.resolve(qualifiedBinaryFileName);
byte[] content = Files.readAllBytes(p);
IBinaryType reader = null;
if (content != null) {
reader = new ClassFileReader(content, qualifiedBinaryFileName.toCharArray());
}
if (reader != null) {
char[] modName = this.module == null ? null : this.module.name();
if (reader instanceof ClassFileReader) {
ClassFileReader classReader = (ClassFileReader) reader;
if (classReader.moduleName == null)
classReader.moduleName = modName;
else
modName = classReader.moduleName;
}
String fileNameWithoutExtension = qualifiedBinaryFileName.substring(0, qualifiedBinaryFileName.length() - SuffixConstants.SUFFIX_CLASS.length);
searchPaths:
if (this.annotationPaths != null) {
String qualifiedClassName = qualifiedBinaryFileName.substring(0, qualifiedBinaryFileName.length()-SuffixConstants.EXTENSION_CLASS.length()-1);
for (String annotationPath : this.annotationPaths) {
try {
if (this.annotationZipFile == null) {
this.annotationZipFile = ExternalAnnotationDecorator.getAnnotationZipFile(annotationPath, null);
}
reader = ExternalAnnotationDecorator.create(reader, annotationPath, qualifiedClassName, this.annotationZipFile);
if (reader.getExternalAnnotationStatus() == ExternalAnnotationStatus.TYPE_IS_ANNOTATED) {
break searchPaths;
}
} catch (IOException e) {
// don't let error on annotations fail class reading
}
}
// location is configured for external annotations, but no .eea found, decorate in order to answer NO_EEA_FILE:
reader = new ExternalAnnotationDecorator(reader, null);
}
if (this.accessRuleSet == null)
return new NameEnvironmentAnswer(reader, null, modName);
return new NameEnvironmentAnswer(reader,
this.accessRuleSet.getViolatedRestriction(fileNameWithoutExtension.toCharArray()),
modName);
}
} catch (IOException | ClassFormatException e) {
// treat as if class file is missing
}
}
return super.findClass(binaryFileName, qualifiedPackageName, moduleName, qualifiedBinaryFileName, asBinaryOnly);
}
}