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/*
* Copyright (C) 2011-2014 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;
import java.lang.reflect.InvocationTargetException;
import java.util.Collections;
import java.util.List;
import lombok.core.ReferenceFieldAugment;
import com.sun.tools.javac.main.JavaCompiler;
import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
import com.sun.tools.javac.util.Context;
public class CommentCatcher {
private final JavaCompiler compiler;
private final ReferenceFieldAugment<JCCompilationUnit, List<CommentInfo>> commentsField;
public static CommentCatcher create(Context context) {
registerCommentsCollectingScannerFactory(context);
JavaCompiler compiler = new JavaCompiler(context);
ReferenceFieldAugment<JCCompilationUnit, List<CommentInfo>> comments = ReferenceFieldAugment.augment(JCCompilationUnit.class, List.class, "lombok$comments");
setInCompiler(compiler, context, comments);
compiler.keepComments = true;
compiler.genEndPos = true;
return new CommentCatcher(compiler, comments);
}
private CommentCatcher(JavaCompiler compiler, ReferenceFieldAugment<JCCompilationUnit, List<CommentInfo>> commentsField) {
this.compiler = compiler;
this.commentsField = commentsField;
}
public JavaCompiler getCompiler() {
return compiler;
}
public void setComments(JCCompilationUnit ast, List<CommentInfo> comments) {
if (comments != null) {
commentsField.set(ast, comments);
} else {
commentsField.clear(ast);
}
}
public List<CommentInfo> getComments(JCCompilationUnit ast) {
List<CommentInfo> list = commentsField.get(ast);
return list == null ? Collections.<CommentInfo>emptyList() : list;
}
private static void registerCommentsCollectingScannerFactory(Context context) {
try {
Class<?> scannerFactory;
int javaCompilerVersion = Javac.getJavaCompilerVersion();
if (javaCompilerVersion <= 6) {
scannerFactory = Class.forName("lombok.javac.java6.CommentCollectingScannerFactory");
} else if (javaCompilerVersion == 7) {
scannerFactory = Class.forName("lombok.javac.java7.CommentCollectingScannerFactory");
} else {
scannerFactory = Class.forName("lombok.javac.java8.CommentCollectingScannerFactory");
}
scannerFactory.getMethod("preRegister", Context.class).invoke(null, context);
} catch (InvocationTargetException e) {
throw Javac.sneakyThrow(e.getCause());
} catch (Exception e) {
throw Javac.sneakyThrow(e);
}
}
private static void setInCompiler(JavaCompiler compiler, Context context, ReferenceFieldAugment<JCCompilationUnit, List<CommentInfo>> commentsField) {
try {
Class<?> parserFactory;
int javaCompilerVersion = Javac.getJavaCompilerVersion();
if (javaCompilerVersion <= 6) {
parserFactory = Class.forName("lombok.javac.java6.CommentCollectingParserFactory");
} else if (javaCompilerVersion == 7) {
parserFactory = Class.forName("lombok.javac.java7.CommentCollectingParserFactory");
} else {
parserFactory = Class.forName("lombok.javac.java8.CommentCollectingParserFactory");
}
parserFactory.getMethod("setInCompiler", JavaCompiler.class, Context.class, ReferenceFieldAugment.class).invoke(null, compiler, context, commentsField);
} catch (InvocationTargetException e) {
throw Javac.sneakyThrow(e.getCause());
} catch (Exception e) {
throw Javac.sneakyThrow(e);
}
}
}
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