package lombok.javac.apt;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
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 java9Compiler(jfm);
}
catch (Throwable e) {}
return Compiler.JAVAC7;
}
if (KNOWN_JAVA9_FILE_MANAGERS.contains(jfmClassName)) {
try {
return java9Compiler(jfm);
}
catch (Throwable e) {}
}
try {
if (Class.forName("com.sun.tools.javac.file.PathFileObject") == null) throw new NullPointerException();
return 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()));
}
private static Constructor<?> j9CompilerConstructor = null;
private static Compiler java9Compiler(JavaFileManager jfm) {
try {
if (j9CompilerConstructor == null) j9CompilerConstructor = Class.forName("lombok.javac.apt.Java9Compiler").getConstructor(JavaFileManager.class);
return (Compiler) j9CompilerConstructor.newInstance(jfm);
} catch (ClassNotFoundException e) {
return null;
} catch (NoSuchMethodException e) {
return null;
} catch (InvocationTargetException e) {
Throwable t = e.getCause();
if (t instanceof RuntimeException) throw (RuntimeException) t;
if (t instanceof Error) throw (Error) t;
throw new RuntimeException(t);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (InstantiationException e) {
throw new RuntimeException(e);
}
}
}