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* 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
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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*/
/*
* @test
* @bug 6334663
* @summary Test that TabularDataSupport preserves the order elements were added
* @author Eamonn McManus
*/
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.management.JMX;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.openmbean.CompositeType;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.OpenType;
import javax.management.openmbean.SimpleType;
import javax.management.openmbean.TabularData;
import javax.management.openmbean.TabularDataSupport;
import javax.management.openmbean.TabularType;
public class TabularDataOrderTest {
private static String failure;
private static final String COMPAT_PROP_NAME = "jmx.tabular.data.hash.map";
private static final String[] intNames = {
"unus", "duo", "tres", "quatuor", "quinque", "sex", "septem",
"octo", "novem", "decim",
};
private static final Map<String, Integer> stringToValue =
new LinkedHashMap<String, Integer>();
static {
for (int i = 0; i < intNames.length; i++)
stringToValue.put(intNames[i], i + 1);
}
public static interface TestMXBean {
public Map<String, Integer> getMap();
}
public static class TestImpl implements TestMXBean {
public Map<String, Integer> getMap() {
return stringToValue;
}
}
private static final CompositeType ct;
private static final TabularType tt;
static {
try {
ct = new CompositeType(
"a.b.c", "name and int",
new String[] {"name", "int"},
new String[] {"name of integer", "value of integer"},
new OpenType<?>[] {SimpleType.STRING, SimpleType.INTEGER});
tt = new TabularType(
"d.e.f", "name and int indexed by name", ct,
new String[] {"name"});
} catch (OpenDataException e) {
throw new AssertionError(e);
}
}
private static TabularData makeTable() throws OpenDataException {
TabularData td = new TabularDataSupport(tt);
for (Map.Entry<String, Integer> entry : stringToValue.entrySet()) {
CompositeData cd = new CompositeDataSupport(
ct,
new String[] {"name", "int"},
new Object[] {entry.getKey(), entry.getValue()});
td.put(cd);
}
return td;
}
public static void main(String[] args) throws Exception {
System.out.println("Testing standard behaviour");
TabularData td = makeTable();
System.out.println(td);
// Test that a default TabularData has the order keys were added in
int last = 0;
boolean ordered = true;
for (Object x : td.values()) {
CompositeData cd = (CompositeData) x;
String name = (String) cd.get("name");
int value = (Integer) cd.get("int");
System.out.println(name + " = " + value);
if (last + 1 != value)
ordered = false;
last = value;
}
if (!ordered)
fail("Order not preserved");
// Now test the undocumented property that causes HashMap to be used
// instead of LinkedHashMap, in case serializing to a 1.3 client.
// We serialize and deserialize in case the implementation handles
// this at serialization time. Then we look at object fields; that's
// not guaranteed to work but at worst it will fail spuriously and
// we'll have to update the test.
System.out.println("Testing compatible behaviour");
System.setProperty(COMPAT_PROP_NAME, "true");
td = makeTable();
System.out.println(td);
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(bout);
oout.writeObject(td);
oout.close();
byte[] bytes = bout.toByteArray();
ByteArrayInputStream bin = new ByteArrayInputStream(bytes);
ObjectInputStream oin = new ObjectInputStream(bin);
td = (TabularData) oin.readObject();
boolean found = false;
for (Field f : td.getClass().getDeclaredFields()) {
if (Modifier.isStatic(f.getModifiers()))
continue;
f.setAccessible(true);
Object x = f.get(td);
if (x != null && x.getClass() == HashMap.class) {
found = true;
System.out.println(
x.getClass().getName() + " TabularDataSupport." +
f.getName() + " = " + x);
break;
}
}
if (!found) {
fail("TabularDataSupport does not contain HashMap though " +
COMPAT_PROP_NAME + "=true");
}
System.clearProperty(COMPAT_PROP_NAME);
System.out.println("Testing MXBean behaviour");
MBeanServer mbs = MBeanServerFactory.newMBeanServer();
ObjectName name = new ObjectName("a:b=c");
mbs.registerMBean(new TestImpl(), name);
TestMXBean proxy = JMX.newMXBeanProxy(mbs, name, TestMXBean.class);
Map<String, Integer> map = proxy.getMap();
List<String> origNames = new ArrayList<String>(stringToValue.keySet());
List<String> proxyNames = new ArrayList<String>(map.keySet());
if (!origNames.equals(proxyNames))
fail("Order mangled after passage through MXBean: " + proxyNames);
if (failure == null)
System.out.println("TEST PASSED");
else
throw new Exception("TEST FAILED: " + failure);
}
private static void fail(String why) {
System.out.println("FAILED: " + why);
failure = why;
}
}