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 *

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

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import java.awt.datatransfer.DataFlavor;

/**

 * @test

 * @bug 8038999

 * @summary DataFlavor.equals is not symmetric

 * @author Petr Pchelko <petr.pchelko@oracle.com>

 */

public class EqualsHashCodeSymmetryTest {

    private static final DataFlavor[] dataFlavors = {

            DataFlavor.stringFlavor,

            DataFlavor.imageFlavor,

            DataFlavor.javaFileListFlavor,

            DataFlavor.allHtmlFlavor,

            DataFlavor.selectionHtmlFlavor,

            DataFlavor.fragmentHtmlFlavor,

            createFlavor("text/html; class=java.lang.String"),

            new DataFlavor(String.class, "My test flavor number 1"),

            new DataFlavor(String.class, "My test flavor number 2"),

            new DataFlavor(StringBuilder.class, "My test flavor number 1")

    };

    public static void main(String[] args) {

        testEqualsSymmetry();

        testEqualsHashCodeConsistency();

        testSimpleCollision();

    }

    private static void testEqualsSymmetry() {

        for (DataFlavor flavor1 : dataFlavors) {

            for (DataFlavor flavor2 : dataFlavors) {

                if (flavor1.equals(flavor2) != flavor2.equals(flavor1)) {

                    throw new RuntimeException(

                            String.format("Equals is not symmetric for %s and %s", flavor1, flavor2));

                }

            }

        }

    }

    private static void testEqualsHashCodeConsistency() {

        for (DataFlavor flavor1 : dataFlavors) {

            for (DataFlavor flavor2 : dataFlavors) {

                if ((flavor1.equals(flavor2) && flavor1.hashCode() != flavor2.hashCode())) {

                    throw new RuntimeException(

                            String.format("Equals and hash code not consistent for %s and %s", flavor1, flavor2));

                }

            }

        }

    }

    private static void testSimpleCollision() {

        if (createFlavor("text/html; class=java.lang.String").hashCode() == DataFlavor.allHtmlFlavor.hashCode()) {

            throw new RuntimeException("HashCode collision because the document parameter is not used");

        }

    }

    private static DataFlavor createFlavor(String mime) {

        try {

            return new DataFlavor(mime);

        } catch (ClassNotFoundException e) {

            throw new RuntimeException(e);

        }

    }

}