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/*
* Copyright (C) 2011-2021 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.java8;
import java.nio.Buffer;
import java.nio.CharBuffer;
import com.sun.tools.javac.parser.Scanner;
import com.sun.tools.javac.parser.ScannerFactory;
import com.sun.tools.javac.util.Context;
public class CommentCollectingScannerFactory extends ScannerFactory {
public static boolean findTextBlocks;
@SuppressWarnings("all")
public static void preRegister(final Context context) {
if (context.get(scannerFactoryKey) == null) {
// Careful! There is voodoo magic here!
//
// Context.Factory is parameterized. make() is for javac6 and below; make(Context) is for javac7 and up.
// this anonymous inner class definition is intentionally 'raw' - the return type of both 'make' methods is 'T',
// which means the compiler will only generate the correct "real" override method (with returntype Object, which is
// the lower bound for T, as a synthetic accessor for the make with returntype ScannerFactory) for that make method which
// is actually on the classpath (either make() for javac6-, or make(Context) for javac7+).
//
// We normally solve this issue via src/stubs, with BOTH make methods listed, but for some reason the presence of a stubbed out
// Context (or even a complete copy, it doesn't matter) results in a really strange eclipse bug, where any mention of any kind
// of com.sun.tools.javac.tree.TreeMaker in a source file disables ALL usage of 'go to declaration' and auto-complete in the entire
// source file.
//
// Thus, in short:
// * Do NOT parameterize the anonymous inner class literal.
// * Leave the return types as 'j.l.Object'.
// * Leave both make methods intact; deleting one has no effect on javac6- / javac7+, but breaks the other. Hard to test for.
// * Do not stub com.sun.tools.javac.util.Context or any of its inner types, like Factory.
@SuppressWarnings("all")
class MyFactory implements Context.Factory {
// This overrides the javac6- version of make.
public Object make() {
return new CommentCollectingScannerFactory(context);
}
// This overrides the javac7+ version.
public Object make(Context c) {
return new CommentCollectingScannerFactory(c);
}
}
@SuppressWarnings("unchecked") Context.Factory<ScannerFactory> factory = new MyFactory();
context.put(scannerFactoryKey, factory);
}
}
/** Create a new scanner factory. */
protected CommentCollectingScannerFactory(Context context) {
super(context);
}
@SuppressWarnings("all")
@Override
public Scanner newScanner(CharSequence input, boolean keepDocComments) {
char[] array;
int limit;
if (input instanceof CharBuffer && ((CharBuffer) input).hasArray()) {
CharBuffer cb = (CharBuffer) input;
((Buffer)cb.compact()).flip();
array = cb.array();
limit = cb.limit();
} else {
array = input.toString().toCharArray();
limit = array.length;
}
if (array.length == limit) {
// work around a bug where the last comment in a file falls away in this case.
char[] d = new char[limit + 1];
System.arraycopy(array, 0, d, 0, limit);
array = d;
}
return newScanner(array, limit, keepDocComments);
}
@Override
public Scanner newScanner(char[] input, int inputLength, boolean keepDocComments) {
return new CommentCollectingScanner(this, CommentCollectingTokenizer.create(this, input, inputLength, findTextBlocks));
}
}
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