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/*
* Copyright (C) 2010-2011 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.javac.apt;
import java.lang.reflect.Method;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.JavaFileObject.Kind;
import lombok.core.DiagnosticsReceiver;
//Can't use SimpleJavaFileObject so we copy/paste most of its content here, because javac doesn't follow the interface,
//and casts to its own BaseFileObject type. D'oh!
final class LombokFileObjects {
enum Compiler {
JAVAC6 {
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 = getDecoderMethod("com.sun.tools.javac.util.BaseFileObject");
decoderIsSet.set(true);
return decoderMethod;
}
}
},
JAVAC7 {
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 = getDecoderMethod("com.sun.tools.javac.file.BaseFileObject");
decoderIsSet.set(true);
return decoderMethod;
}
}
};
static Method getDecoderMethod(String className) {
Method m = null;
try {
m = Class.forName(className).getDeclaredMethod("getDecoder", boolean.class);
m.setAccessible(true);
} catch (NoSuchMethodException e) {
// Intentional fallthrough - getDecoder(boolean) is not always present.
} catch (ClassNotFoundException e) {
// Intentional fallthrough - getDecoder(boolean) is not always present.
}
return m;
}
abstract JavaFileObject wrap(LombokFileObject fileObject);
abstract Method getDecoderMethod();
}
private LombokFileObjects() {}
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")) return Compiler.JAVAC7;
try {
if (Class.forName("com.sun.tools.javac.file.BaseFileObject") == null) throw new NullPointerException();
return Compiler.JAVAC7;
} catch (Exception e) {}
try {
if (Class.forName("com.sun.tools.javac.util.BaseFileObject") == null) throw new NullPointerException();
return Compiler.JAVAC6;
} catch (Exception e) {}
return null;
}
static JavaFileObject createEmpty(Compiler compiler, String name, Kind kind) {
return compiler.wrap(new EmptyLombokFileObject(name, kind));
}
static JavaFileObject createIntercepting(Compiler compiler, JavaFileObject delegate, String fileName, DiagnosticsReceiver diagnostics) {
return compiler.wrap(new InterceptingJavaFileObject(delegate, fileName, diagnostics, compiler.getDecoderMethod()));
}
}
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