/*

 * 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.

 *

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 */

/*

 * @test

 * @bug 6988836

 * @summary A new JavacElements is created for each round of annotation processing

 * @library /tools/javac/lib

 * @build JavacTestingAbstractProcessor TestContext

 * @compile/process -processor TestContext -XprintRounds TestContext

 */

import java.io.*;

import java.util.*;

import javax.annotation.processing.*;

import javax.lang.model.element.*;

import static javax.tools.Diagnostic.Kind.*;

import com.sun.source.util.Trees;

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

import com.sun.tools.javac.model.JavacElements;

import com.sun.tools.javac.model.JavacTypes;

import com.sun.tools.javac.processing.JavacProcessingEnvironment;

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

public class TestContext extends JavacTestingAbstractProcessor {

    Trees treeUtils;

    int round = 0;

    @Override

    public void init(ProcessingEnvironment pEnv) {

        super.init(pEnv);

        treeUtils = Trees.instance(processingEnv);

    }

    @Override

    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {

        round++;

        JavacProcessingEnvironment jpe = (JavacProcessingEnvironment) processingEnv;

        Context c = jpe.getContext();

        check(c.get(JavacElements.class), eltUtils);

        check(c.get(JavacTypes.class), typeUtils);

        check(c.get(JavacTrees.class), treeUtils);

        final int MAXROUNDS = 3;

        if (round < MAXROUNDS)

            generateSource("Gen" + round);

        return true;

    }

    <T> void check(T actual, T expected) {

//        messager.printMessage(NOTE, "expect: " + expected);

//        messager.printMessage(NOTE, "actual: " + actual);

        if (actual != expected) {

            messager.printMessage(ERROR,

                "round " + round + " unexpected value for " + expected.getClass().getName() + ": " + actual);

        }

    }

    void generateSource(String name) {

        String text = "class " + name + " { }\n";

        try (Writer out = filer.createSourceFile(name).openWriter()) {

                out.write(text);

        } catch (IOException e) {

            throw new Error(e);

        }

    }

}