[GROOVY-7330] Incorrect dynamic proxy creation from map when there are default methods

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.4.1
• Fix Version/s: 3.0.0-alpha-4, 2.5.3
• Component/s: groovy-runtime
• Labels: Java_8 default-methods
• Assignee: Paul King
• Reporter: Dmitry Ovchinnikov
• Created: 04/Mar/15 11:21
• Updated: 10/Aug/22 19:12
• Resolved: 19/Aug/18 07:02

Description

package org.dimitrovchi.groovybugs;

import groovy.lang.GroovyShell;
import org.codehaus.groovy.control.CompilerConfiguration;
import org.codehaus.groovy.runtime.DefaultGroovyMethods;
import org.junit.Assert;
import org.junit.Test;

import java.util.Map;

/**
 * @author Dmitry Ovchinnikov
 */
public class MapToProxyTest {

    private final GroovyShell shell;

    public MapToProxyTest() {
        final CompilerConfiguration cc = new CompilerConfiguration();
        cc.setTargetBytecode(CompilerConfiguration.JDK8);
        shell = new GroovyShell(cc);
    }

    @Test
    public void testMapToProxy() {
        final Map map = (Map) shell.evaluate("[x: {10}, y: {20}]");
        final SomeInterface si = DefaultGroovyMethods.asType(map, SomeInterface.class);
        Assert.assertEquals(20, si.y());
        Assert.assertEquals(10, si.x()); // assertion error: si.x() == 1
    }

    public interface SomeInterface {

        default int x() {
            return 1;
        }

        int y();
    }
}

JDK 1.8u31

Issue Links

• is duplicated by: GROOVY-7412 Map-to-interface cast: map method definition does not override the default method
• relates to: GROOVY-10717 Map to type coercion not working on abstract classes
• links to: GitHub Pull Request #785