/*

 * Copyright (c) 2006, 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 6402516 8031569

 * @summary need Trees.getScope(TreePath)

 * @build Checker CheckLocalElements

 * @run main CheckLocalElements

 */

import java.io.IOException;

import java.util.*;

import java.util.regex.*;

import javax.lang.model.element.*;

import javax.lang.model.util.*;

import com.sun.source.tree.*;

import com.sun.source.util.*;

/*

 * Check the local elements of a scope against the contents of string literals and top-level comment.

 */

public class CheckLocalElements extends Checker {

    public static void main(String... args) throws Exception {

        Checker chk = new CheckLocalElements();

        chk.check("TestLocalElements.java");

    }

    @Override

    protected boolean checkLocal(Scope s, String ref) {

        Iterator<? extends Element> elemIter = s.getLocalElements().iterator();

        ref = ref.trim();

        String[] refs = ref.length() == 0 ? new String[0] : ref.split("[ ]*,[ ]*", -1);

        Iterator<String> refIter = Arrays.asList(refs).iterator();

        String r = null;

        nextElem:

        while (elemIter.hasNext()) {

            Element e = elemIter.next();

            try {

                if (r == null)

                    r = refIter.next();

                while (r.endsWith(".*")) {

                    String encl = getEnclosingName(e);

                    String rBase = r.substring(0, r.length() - 2);

                    if (encl.equals(rBase) || encl.startsWith(rBase + "."))

                        continue nextElem;

                    r = refIter.next();

                }

                if (r.equals("-") && (e.getSimpleName().length() == 0)

                    || e.getSimpleName().toString().equals(r)) {

                    r = null;

                    continue nextElem;

                }

                error(s, ref, "mismatch: " + e.getSimpleName() + " " + r);

                return false;

            } catch (NoSuchElementException ex) { // from refIter.next()

                error(s, null, "scope has unexpected entry: " + e.getSimpleName());

                return false;

            }

        }

        if (refIter.hasNext()) {

            error(s, ref, "scope is missing entry: " + refIter.next());

            return false;

        }

        return true;

    }

    @Override

    void additionalChecks(Trees trees, CompilationUnitTree topLevel) throws IOException {

        Matcher m = TOPLEVEL_SCOPE_DEF.matcher(topLevel.getSourceFile().getCharContent(false));

        if (!m.find())

            throw new AssertionError("Should have top-level scope def!");

        check(trees.getScope(new TreePath(topLevel)), m.group(1));

    }

    //where:

        Pattern TOPLEVEL_SCOPE_DEF = Pattern.compile("TOPLEVEL_SCOPE:(.*)");

    private String getEnclosingName(Element e) {

        Element encl = e.getEnclosingElement();

        return encl == null ? "" : encl.accept(qualNameVisitor, null);

    }

    private ElementVisitor<String,Void> qualNameVisitor = new SimpleElementVisitor9<String,Void>() {

        protected String defaultAction(Element e, Void ignore) {

            return "";

        }

        public String visitPackage(PackageElement e, Void ignore) {

            return e.getQualifiedName().toString();

        }

        public String visitType(TypeElement e, Void ignore) {

            return e.getQualifiedName().toString();

        }

    };

}