package lombok.javac.apt;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URI;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.tools.FileObject;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.JavaFileObject.Kind;
import com.sun.tools.javac.file.BaseFileManager;
import lombok.core.DiagnosticsReceiver;
import lombok.permit.Permit;
final class LombokFileObjects {
interface Compiler {
Compiler JAVAC6 = new Compiler() {
private Method decoderMethod = null;
private final AtomicBoolean decoderIsSet = new AtomicBoolean();
@Override public JavaFileObject wrap(LombokFileObject fileObject) {
return new Javac6BaseFileObjectWrapper(fileObject);
}
@Override public Method getDecoderMethod() {
synchronized (decoderIsSet) {
if (decoderIsSet.get()) return decoderMethod;
decoderMethod = LombokFileObjects.getDecoderMethod("com.sun.tools.javac.util.BaseFileObject");
decoderIsSet.set(true);
return decoderMethod;
}
}
};
Compiler JAVAC7 = new Compiler() {
private Method decoderMethod = null;
private final AtomicBoolean decoderIsSet = new AtomicBoolean();
@Override public JavaFileObject wrap(LombokFileObject fileObject) {
return new Javac7BaseFileObjectWrapper(fileObject);
}
@Override public Method getDecoderMethod() {
synchronized (decoderIsSet) {
if (decoderIsSet.get()) return decoderMethod;
decoderMethod = LombokFileObjects.getDecoderMethod("com.sun.tools.javac.file.BaseFileObject");
decoderIsSet.set(true);
return decoderMethod;
}
}
};
JavaFileObject wrap(LombokFileObject fileObject);
Method getDecoderMethod();
}
static Method getDecoderMethod(String className) {
try {
return Permit.getMethod(Class.forName(className), "getDecoder", boolean.class);
} catch (NoSuchMethodException e) {
} catch (ClassNotFoundException e) {
}
return null;
}
private LombokFileObjects() {}
private static final List<String> KNOWN_JAVA9_FILE_MANAGERS = Arrays.asList(
"com.google.errorprone.MaskedClassLoader$MaskedFileManager",
"com.google.devtools.build.buildjar.javac.BlazeJavacMain$ClassloaderMaskingFileManager",
"com.google.devtools.build.java.turbine.javac.JavacTurbineCompiler$ClassloaderMaskingFileManager",
"org.netbeans.modules.java.source.parsing.ProxyFileManager",
"com.sun.tools.javac.api.ClientCodeWrapper$WrappedStandardJavaFileManager",
"com.sun.tools.javac.main.DelegatingJavaFileManager$DelegatingSJFM"
);
static Compiler getCompiler(JavaFileManager jfm) {
String jfmClassName = jfm != null ? jfm.getClass().getName() : "null";
if (jfmClassName.equals("com.sun.tools.javac.util.DefaultFileManager")) return Compiler.JAVAC6;
if (jfmClassName.equals("com.sun.tools.javac.util.JavacFileManager")) return Compiler.JAVAC6;
if (jfmClassName.equals("com.sun.tools.javac.file.JavacFileManager")) {
try {
Class<?> superType = Class.forName("com.sun.tools.javac.file.BaseFileManager");
if (superType.isInstance(jfm)) {
return new Java9Compiler(jfm);
}
}
catch (Throwable e) {}
return Compiler.JAVAC7;
}
if (KNOWN_JAVA9_FILE_MANAGERS.contains(jfmClassName)) {
try {
return new Java9Compiler(jfm);
}
catch (Throwable e) {}
}
try {
if (Class.forName("com.sun.tools.javac.file.PathFileObject") == null) throw new NullPointerException();
return new Java9Compiler(jfm);
} catch (Throwable e) {}
try {
if (Class.forName("com.sun.tools.javac.file.BaseFileObject") == null) throw new NullPointerException();
return Compiler.JAVAC7;
} catch (Throwable e) {}
try {
if (Class.forName("com.sun.tools.javac.util.BaseFileObject") == null) throw new NullPointerException();
return Compiler.JAVAC6;
} catch (Throwable e) {}
StringBuilder sb = new StringBuilder(jfmClassName);
if (jfm != null) {
sb.append(" extends ").append(jfm.getClass().getSuperclass().getName());
for (Class<?> cls : jfm.getClass().getInterfaces()) {
sb.append(" implements ").append(cls.getName());
}
}
throw new IllegalArgumentException(sb.toString());
}
static JavaFileObject createIntercepting(Compiler compiler, JavaFileObject delegate, String fileName, DiagnosticsReceiver diagnostics) {
return compiler.wrap(new InterceptingJavaFileObject(delegate, fileName, diagnostics, compiler.getDecoderMethod()));
}
static class Java9Compiler implements Compiler {
private final BaseFileManager fileManager;
public Java9Compiler(JavaFileManager jfm) {
fileManager = asBaseFileManager(jfm);
}
@Override public JavaFileObject wrap(LombokFileObject fileObject) {
Path p; try {
p = toPath(fileObject);
} catch (Exception e) {
p = null;
}
if (p != null) return new Javac9BaseFileObjectWrapper(fileManager, p, fileObject);
return new Javac9JavaFileObjectWrapper(fileObject);
}
@Override public Method getDecoderMethod() {
return null;
}
private static Path toPath(LombokFileObject fileObject) {
URI uri = fileObject.toUri();
if (uri.getScheme() == null) {
uri = URI.create("file:///" + uri);
}
try {
return Paths.get(uri);
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException("Problems in URI '" + uri + "' (" + fileObject.toUri() + ")", e);
}
}
private static BaseFileManager asBaseFileManager(JavaFileManager jfm) {
if (jfm instanceof BaseFileManager) {
return (BaseFileManager) jfm;
}
return new FileManagerWrapper(jfm);
}
static class FileManagerWrapper extends BaseFileManager {
JavaFileManager manager;
public FileManagerWrapper(JavaFileManager manager) {
super(null);
this.manager = manager;
}
@Override
public int isSupportedOption(String option) {
return manager.isSupportedOption(option);
}
@Override
public ClassLoader getClassLoader(Location location) {
return manager.getClassLoader(location);
}
@Override
public Iterable<JavaFileObject> list(Location location, String packageName, Set<Kind> kinds, boolean recurse) throws IOException {
return manager.list(location, packageName, kinds, recurse);
}
@Override
public String inferBinaryName(Location location, JavaFileObject file) {
return manager.inferBinaryName(location, file);
}
@Override
public boolean isSameFile(FileObject a, FileObject b) {
return manager.isSameFile(a, b);
}
@Override
public boolean handleOption(String current, Iterator<String> remaining) {
return manager.handleOption(current, remaining);
}
@Override
public boolean hasLocation(Location location) {
return manager.hasLocation(location);
}
@Override
public JavaFileObject getJavaFileForInput(Location location, String className, Kind kind) throws IOException {
return manager.getJavaFileForInput(location, className, kind);
}
@Override
public JavaFileObject getJavaFileForOutput(Location location, String className, Kind kind, FileObject sibling) throws IOException {
return manager.getJavaFileForOutput(location, className, kind, sibling);
}
@Override
public FileObject getFileForInput(Location location, String packageName, String relativeName) throws IOException {
return manager.getFileForInput(location, packageName, relativeName);
}
@Override
public FileObject getFileForOutput(Location location, String packageName, String relativeName, FileObject sibling) throws IOException {
return manager.getFileForOutput(location, packageName, relativeName, sibling);
}
@Override
public void flush() throws IOException {
manager.flush();
}
@Override
public void close() throws IOException {
manager.close();
}
}
}
}