/*

 * 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.

 *

 */

/*

 * @test 6716452

 * @summary need a method to get an index of an attribute

 */

import java.io.*;

import com.sun.tools.classfile.*;

public class T6716452 {

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

        new T6716452().run();

    }

    public void run() throws Exception {

        File javaFile = writeTestFile();

        File classFile = compileTestFile(javaFile);

        ClassFile cf = ClassFile.read(classFile);

        for (Method m: cf.methods) {

            test(cf, m);

        }

        if (errors > 0)

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

    }

    void test(ClassFile cf, Method m) {

        test(cf, m, Attribute.Code, Code_attribute.class);

        test(cf, m, Attribute.Exceptions, Exceptions_attribute.class);

    }

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

    // encoded in the method's name

    void test(ClassFile cf, Method m, String name, Class<?> c) {

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

        try {

            String m_name = m.getName(cf.constant_pool);

            System.err.println("Method " + m_name + " name:" + name + " index:" + index + " class: " + c);

            boolean expect = (m_name.equals("<init>") && name.equals("Code"))

                || (m_name.indexOf(name) != -1);

            boolean found = (index != -1);

            if (expect) {

                if (found) {

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

                    if (!c.isAssignableFrom(attr.getClass())) {

                        error(m + ": unexpected attribute found,"

                              + " expected " + c.getName()

                              + " found " + attr.getClass().getName());

                    }

                } else {

                    error(m + ": expected attribute " + name + " not found");

                }

            } else {

                if (found) {

                    error(m + ": unexpected attribute " + name);

                }

            }

        } catch (ConstantPoolException e) {

            error(m + ": " + e);

        }

    }

    File writeTestFile() throws IOException {

        File f = new File("Test.java");

        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));

        out.println("abstract class Test { ");

        out.println("  abstract void m();");

        out.println("  void m_Code() { }");

        out.println("  abstract void m_Exceptions() throws Exception;");

        out.println("  void m_Code_Exceptions() throws Exception { }");

        out.println("}");

        out.close();

        return f;

    }

    File compileTestFile(File f) {

        int rc = com.sun.tools.javac.Main.compile(new String[] { "-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 error(String msg) {

        System.err.println("error: " + msg);

        errors++;

    }

    int errors;

}