test/jdk/java/beans/Introspector/Test8005065.java

/*
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 * 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.
 */

/*
 * @test
 * @bug 8005065
 * @summary Tests that all arrays in JavaBeans are guarded
 * @author Sergey Malenkov
 */

import java.beans.DefaultPersistenceDelegate;
import java.beans.Encoder;
import java.beans.EventSetDescriptor;
import java.beans.ExceptionListener;
import java.beans.Expression;
import java.beans.Statement;
import java.beans.MethodDescriptor;
import java.beans.ParameterDescriptor;

public class Test8005065 {

    public static void main(String[] args) {
        testDefaultPersistenceDelegate();
        testEventSetDescriptor();
        testMethodDescriptor();
        testStatement();
    }

    private static void testDefaultPersistenceDelegate() {
        Encoder encoder = new Encoder();
        String[] array = { "array" };
        MyDPD dpd = new MyDPD(array);
        dpd.instantiate(dpd, encoder);
        array[0] = null;
        dpd.instantiate(dpd, encoder);
    }

    private static void testEventSetDescriptor() {
        try {
            MethodDescriptor[] array = { new MethodDescriptor(MyDPD.class.getMethod("getArray")) };
            EventSetDescriptor descriptor = new EventSetDescriptor(null, null, array, null, null);
            test(descriptor.getListenerMethodDescriptors());
            array[0] = null;
            test(descriptor.getListenerMethodDescriptors());
            descriptor.getListenerMethodDescriptors()[0] = null;
            test(descriptor.getListenerMethodDescriptors());
        }
        catch (Exception exception) {
            throw new Error("unexpected error", exception);
        }
    }

    private static void testMethodDescriptor() {
        try {
            ParameterDescriptor[] array = { new ParameterDescriptor() };
            MethodDescriptor descriptor = new MethodDescriptor(MyDPD.class.getMethod("getArray"), array);
            test(descriptor.getParameterDescriptors());
            array[0] = null;
            test(descriptor.getParameterDescriptors());
            descriptor.getParameterDescriptors()[0] = null;
            test(descriptor.getParameterDescriptors());
        }
        catch (Exception exception) {
            throw new Error("unexpected error", exception);
        }
    }

    private static void testStatement() {
        Object[] array = { new Object() };
        Statement statement = new Statement(null, null, array);
        test(statement.getArguments());
        array[0] = null;
        test(statement.getArguments());
        statement.getArguments()[0] = null;
        test(statement.getArguments());
    }

    private static <T> void test(T[] array) {
        if (array.length != 1) {
            throw new Error("unexpected array length");
        }
        if (array[0] == null) {
            throw new Error("unexpected array content");
        }
    }

    public static class MyDPD
            extends DefaultPersistenceDelegate
            implements ExceptionListener {

        private final String[] array;

        public MyDPD(String[] array) {
            super(array);
            this.array = array;
        }

        public Expression instantiate(Object instance, Encoder encoder) {
            encoder.setExceptionListener(this);
            return super.instantiate(instance, encoder);
        }

        public String[] getArray() {
            return this.array;
        }

        public void exceptionThrown(Exception exception) {
            throw new Error("unexpected error", exception);
        }
    }
}