/*

 * @test  /nodynamiccopyright/

 * @bug 6406771

 * @summary CompilationUnitTree needs access to a line map

 */

// WARNING: White-space and layout is important in this file, especially tab characters.

import java.io.*;

import java.util.*;

import javax.annotation.processing.*;

import javax.lang.model.*;

import javax.lang.model.element.*;

import javax.tools.*;

import com.sun.tools.javac.api.*;

import com.sun.source.tree.*;

import com.sun.source.util.*;

import com.sun.tools.javac.tree.JCTree;

@SupportedAnnotationTypes("*")

public class T6406771 extends AbstractProcessor {

    String[] tests = {

//       1         2         3         4         5         6

//3456789012345678901234567890123456789012345678901234567890

      "col:7", "col:16", "col:26",                 // this line uses spaces

        "col:9",        "col:25",       "col:41",  // this line uses tabs

                   "col:20",              "col:43" // this line uses a mixture

    };

    // White-space after this point does not matter

    public static void main(String[] args) throws IOException {

        String self = T6406771.class.getName();

        String testSrc = System.getProperty("test.src");

        String testClasses = System.getProperty("test.classes");

        JavacTool tool = JavacTool.create();

        try (StandardJavaFileManager fm = tool.getStandardFileManager(null, null, null)) {

            JavaFileObject f = fm.getJavaFileObjectsFromFiles(Arrays.asList(new File(testSrc, self+".java"))).iterator().next();

            List<String> opts = Arrays.asList("-d", ".", "-processorpath", testClasses, "-processor", self, "-proc:only");

            JavacTask task = tool.getTask(null, fm, null, opts, null, Arrays.asList(f));

            if (!task.call())

                throw new AssertionError("failed");

        }

    }

    public boolean process(Set<? extends TypeElement> elems, RoundEnvironment rEnv) {

        final String LINE = "line" + ':';   // avoid matching this string

        final String COLUMN  = "col" + ':';

        final Messager messager = processingEnv.getMessager();

        final Trees trees = Trees.instance(processingEnv);

        TreeScanner<Void,LineMap> s = new  TreeScanner<Void,LineMap>() {

            public Void visitLiteral(LiteralTree tree, LineMap lineMap) {

                if (tree.getKind() == Tree.Kind.STRING_LITERAL) {

                    String s = (String) tree.getValue();

                    int pos = ((JCTree) tree).pos; // can't get through public api, bug 6412669 filed

                    String prefix;

                    long found;

                    if (s.startsWith(LINE)) {

                        prefix = LINE;

                        found = lineMap.getLineNumber(pos);

                    }

                    else if (s.startsWith(COLUMN)) {

                        prefix = COLUMN;

                        found = lineMap.getColumnNumber(pos);

                    }

                    else

                        return null;

                    int expect = Integer.parseInt(s.substring(prefix.length()));

                    if (expect != found) {

                        messager.printMessage(Diagnostic.Kind.ERROR,

                                              "Error: " + prefix + " pos=" + pos

                                              + " expect=" + expect + " found=" + found);

                    }

                }

                return null;

            }

        };

        for (Element e: rEnv.getRootElements()) {

            System.err.println(e);

            Tree t = trees.getTree(e);

            TreePath p = trees.getPath(e);

            s.scan(p.getLeaf(), p.getCompilationUnit().getLineMap());

        }

        return true;

    }

    @Override

    public SourceVersion getSupportedSourceVersion() {

        return SourceVersion.latest();

    }

}