ObjectNameGetInstanceTest.java

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/*
 * @test
 * @bug 4894801
 * @summary Test that ObjectName.getInstance(ObjectName) preserves key order
 * @author Eamonn McManus
 * @modules java.management
 * @run clean ObjectNameGetInstanceTest
 * @run build ObjectNameGetInstanceTest
 * @run main ObjectNameGetInstanceTest
 */

import javax.management.*;

public class ObjectNameGetInstanceTest {
    public static void main(String[] args) throws Exception {
        System.out.println("Test that ObjectName.getInstance(ObjectName) " +
                           "preserves the order of keys in its input");

        final String nonCanonical = "d:x=y,a=b";
        ObjectName nice = new ObjectName(nonCanonical);

        // Check that we are in fact using an ObjectName whose canonical
        // form is not the same as the input
        if (nice.getCanonicalName().equals(nonCanonical)) {
            System.err.println("TEST IS BROKEN: INPUT ALREADY CANONICAL");
            System.exit(1);
        }

        ObjectName evil = new EvilObjectName(nonCanonical);
        ObjectName unEvil = ObjectName.getInstance(evil);
        if (unEvil instanceof EvilObjectName) {
            System.err.println("FAILS: getInstance did not banish evil");
            System.exit(1);
        }

        if (nice.equals(unEvil))
            System.out.println("Test passes: original key order preserved");
        else {
            System.out.println("FAILS: key order changed");
            System.exit(1);
        }
    }

    public static class EvilObjectName extends ObjectName {
        public EvilObjectName(String s) throws MalformedObjectNameException {
            super(s);
        }

        public String getCanonicalName() {
            return "bogus:canonical=name";
        }
    }
}