/*

 * Copyright (c) 2015, 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.

 */

import com.sun.source.tree.CompilationUnitTree;

import com.sun.source.tree.Tree;

import com.sun.source.util.SourcePositions;

import com.sun.source.util.TreePath;

import com.sun.source.util.Trees;

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

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

import com.sun.tools.javac.util.Context;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Iterator;

import java.util.List;

import javax.lang.model.element.Element;

import javax.tools.Diagnostic;

import javax.tools.DiagnosticCollector;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileManager;

import javax.tools.JavaFileObject;

import javax.tools.ToolProvider;

import javax.tools.StandardJavaFileManager;

import com.sun.source.tree.ImportTree;

import java.util.Collections;

import java.io.PrintWriter;

import com.sun.source.tree.VariableTree;

import static javax.tools.StandardLocation.CLASS_OUTPUT;

/*

 * @test

 * @bug 8067384 8068488

 * @summary Verify that JavacParser can be extended

 */

public class JavacExtensionTest {

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

        PrintWriter pw = new PrintWriter("trialSource.java", "UTF-8");

        pw.println("int x = 9;");

        pw.close();

        List<? extends Tree> defs = parse("trialSource.java");

        if (defs.size() != 1) {

            throw new AssertionError("Expected only one def, got: " + defs.size());

        }

        Tree tree = defs.get(0);

        if (tree instanceof VariableTree) {

            System.out.println("Passes!  --- " + tree);

        } else {

            throw new AssertionError("Expected VariableTree, got: " + tree);

        }

    }

    static List<? extends Tree> parse(String srcfile) throws Exception {

        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

        StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);

        Iterable<? extends JavaFileObject> fileObjects = fileManager.getJavaFileObjects(srcfile);

        String classPath = System.getProperty("java.class.path");

        List<String> options = Arrays.asList("-classpath", classPath);

        DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();

        Context context = new Context();

        JavacTaskImpl task = (JavacTaskImpl) ((JavacTool) compiler).getTask(null, null,

                diagnostics, options, null, fileObjects, context);

        TrialParserFactory.instance(context);

        Iterable<? extends CompilationUnitTree> asts = task.parse();

        Iterator<? extends CompilationUnitTree> it = asts.iterator();

        if (it.hasNext()) {

            CompilationUnitTree cut = it.next();

            return cut.getTypeDecls();

        } else {

            throw new AssertionError("Expected compilation unit");

        }

    }

}