/*

 * 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 java.io.*;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.net.URL;

import java.util.List;

import com.sun.tools.classfile.*;

/*

 * @test NoTargetAnnotations

 * @summary test that annotations with no Target meta type is emitted

 *          only once as declaration annotation

 */

public class NoTargetAnnotations {

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

        new NoTargetAnnotations().run();

    }

    public void run() throws Exception {

        ClassFile cf = getClassFile("NoTargetAnnotations$Test.class");

        for (Field f : cf.fields) {

            test(cf, f);

            testDeclaration(cf, f);

        }

        for (Method m: cf.methods) {

            test(cf, m);

            testDeclaration(cf, m);

        }

        countAnnotations();

        if (errors > 0)

            throw new Exception(errors + " errors found");

        System.out.println("PASSED");

    }

    ClassFile getClassFile(String name) throws IOException, ConstantPoolException {

        URL url = getClass().getResource(name);

        InputStream in = url.openStream();

        try {

            return ClassFile.read(in);

        } finally {

            in.close();

        }

    }

    /************ Helper annotations counting methods ******************/

    void test(ClassFile cf, Method m) {

        test(cf, m, Attribute.RuntimeVisibleTypeAnnotations, true);

        test(cf, m, Attribute.RuntimeInvisibleTypeAnnotations, false);

    }

    void test(ClassFile cf, Field m) {

        test(cf, m, Attribute.RuntimeVisibleTypeAnnotations, true);

        test(cf, m, Attribute.RuntimeInvisibleTypeAnnotations, false);

    }

    void testDeclaration(ClassFile cf, Method m) {

        testDecl(cf, m, Attribute.RuntimeVisibleAnnotations, true);

        testDecl(cf, m, Attribute.RuntimeInvisibleAnnotations, false);

    }

    void testDeclaration(ClassFile cf, Field m) {

        testDecl(cf, m, Attribute.RuntimeVisibleAnnotations, true);

        testDecl(cf, m, Attribute.RuntimeInvisibleAnnotations, false);

    }

    // test the result of Attributes.getIndex according to expectations

    // encoded in the method's name

    void test(ClassFile cf, Method m, String name, boolean visible) {

        int index = m.attributes.getIndex(cf.constant_pool, name);

        if (index != -1) {

            Attribute attr = m.attributes.get(index);

            assert attr instanceof RuntimeTypeAnnotations_attribute;

            RuntimeTypeAnnotations_attribute tAttr = (RuntimeTypeAnnotations_attribute)attr;

            all += tAttr.annotations.length;

            if (visible)

                visibles += tAttr.annotations.length;

            else

                invisibles += tAttr.annotations.length;

        }

    }

    // test the result of Attributes.getIndex according to expectations

    // encoded in the method's name

    void test(ClassFile cf, Field m, String name, boolean visible) {

        int index = m.attributes.getIndex(cf.constant_pool, name);

        if (index != -1) {

            Attribute attr = m.attributes.get(index);

            assert attr instanceof RuntimeTypeAnnotations_attribute;

            RuntimeTypeAnnotations_attribute tAttr = (RuntimeTypeAnnotations_attribute)attr;

            all += tAttr.annotations.length;

            if (visible)

                visibles += tAttr.annotations.length;

            else

                invisibles += tAttr.annotations.length;

        }

    }

    // test the result of Attributes.getIndex according to expectations

    // encoded in the method's name

    void testDecl(ClassFile cf, Method m, String name, boolean visible) {

        int index = m.attributes.getIndex(cf.constant_pool, name);

        if (index != -1) {

            Attribute attr = m.attributes.get(index);

            assert attr instanceof RuntimeAnnotations_attribute;

            RuntimeAnnotations_attribute tAttr = (RuntimeAnnotations_attribute)attr;

            this.declAnnotations += tAttr.annotations.length;

        }

    }

    // test the result of Attributes.getIndex according to expectations

    // encoded in the method's name

    void testDecl(ClassFile cf, Field m, String name, boolean visible) {

        int index = m.attributes.getIndex(cf.constant_pool, name);

        if (index != -1) {

            Attribute attr = m.attributes.get(index);

            assert attr instanceof RuntimeAnnotations_attribute;

            RuntimeAnnotations_attribute tAttr = (RuntimeAnnotations_attribute)attr;

            this.declAnnotations += tAttr.annotations.length;

        }

    }

    File compileTestFile(File f) {

        int rc = com.sun.tools.javac.Main.compile(new String[] { "-XDTA:writer", "-g", f.getPath() });

        if (rc != 0)

            throw new Error("compilation failed. rc=" + rc);

        String path = f.getPath();

        return new File(path.substring(0, path.length() - 5) + ".class");

    }

    void countAnnotations() {

        int expected_all = expected_visibles + expected_invisibles;

        if (expected_all != all) {

            errors++;

            System.err.println("expected " + expected_all

                    + " annotations but found " + all);

        }

        if (expected_visibles != visibles) {

            errors++;

            System.err.println("expected " + expected_visibles

                    + " visibles annotations but found " + visibles);

        }

        if (expected_invisibles != invisibles) {

            errors++;

            System.err.println("expected " + expected_invisibles

                    + " invisibles annotations but found " + invisibles);

        }

        if (expected_decl != declAnnotations) {

            errors++;

            System.err.println("expected " + expected_decl

                    + " declaration annotations but found " + declAnnotations);

        }

    }

    int errors;

    int all;

    int visibles;

    int invisibles;

    int declAnnotations;

    /*********************** Test class *************************/

    static int expected_invisibles = 0;

    static int expected_visibles = 0;

    static int expected_decl = 1;

    static class Test {

        @Retention(RetentionPolicy.RUNTIME)

        @interface A {}

        @A String method() {

            return null;

        }

    }

}