| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * 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 8041565 |
| * @summary Tests the limits imposed on the domain name part of an |
| * ObjectName instance |
| * @author Jaroslav Bachorik |
| * @modules java.management/javax.management:open |
| * @run main CompressedStorageTest |
| */ |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.function.Consumer; |
| import javax.management.MalformedObjectNameException; |
| import javax.management.ObjectName; |
| |
| public class CompressedStorageTest { |
| private static Method setDomainLengthM; |
| private static Field compressedStorageFld; |
| |
| private static int DOMAIN_PATTERN; |
| private static int PROPLIST_PATTERN; |
| private static int PROPVAL_PATTERN; |
| |
| private static Method setDomainPattern; |
| private static Method setPropertyListPattern; |
| private static Method setPropertyValuePattern; |
| |
| |
| static { |
| try { |
| Class<?> clz = ObjectName.class; |
| setDomainLengthM = clz.getDeclaredMethod("setDomainLength", int.class); |
| setDomainLengthM.setAccessible(true); |
| |
| compressedStorageFld = clz.getDeclaredField("_compressed_storage"); |
| compressedStorageFld.setAccessible(true); |
| |
| setDomainPattern = clz.getDeclaredMethod("setDomainPattern", boolean.class); |
| setDomainPattern.setAccessible(true); |
| setPropertyListPattern = clz.getDeclaredMethod("setPropertyListPattern", boolean.class); |
| setPropertyListPattern.setAccessible(true); |
| setPropertyValuePattern = clz.getDeclaredMethod("setPropertyValuePattern", boolean.class); |
| setPropertyValuePattern.setAccessible(true); |
| |
| DOMAIN_PATTERN = getStaticIntFld("DOMAIN_PATTERN"); |
| PROPLIST_PATTERN = getStaticIntFld("PROPLIST_PATTERN"); |
| PROPVAL_PATTERN = getStaticIntFld("PROPVAL_PATTERN"); |
| |
| } catch (Exception e) { |
| throw new Error(e); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| testZeroLength(); |
| testNegativeLength(); |
| testMaxLength(); |
| |
| testSetDomainPattern(); |
| testSetPropertyListPattern(); |
| testSetPropertyValuePattern(); |
| } |
| |
| private static ObjectName getObjectName() |
| throws MalformedObjectNameException { |
| return new ObjectName("domain", "key", "value"); |
| } |
| |
| /** |
| * Test for accepting 0 being passed as argument to |
| * {@linkplain ObjectName#setDomainLength(int)}. |
| * |
| */ |
| private static void testZeroLength() throws Exception { |
| setDomainNameLength(0); |
| } |
| |
| /** |
| * Test for rejecting negative value being passed as argument to |
| * {@linkplain ObjectName#setDomainLength(int)}. |
| */ |
| private static void testNegativeLength() throws Exception { |
| try { |
| setDomainNameLength(-1); |
| } catch (MalformedObjectNameException e) { |
| return; |
| } |
| fail("Allowing negative domain name length"); |
| } |
| |
| /** |
| * Test for rejecting value exceeding the maximum allowed length |
| * being passed as argument to {@linkplain ObjectName#setDomainLength(int)}. |
| */ |
| private static void testMaxLength() throws Exception { |
| try { |
| setDomainNameLength(Integer.MAX_VALUE / 4 + 1); |
| } catch (MalformedObjectNameException e) { |
| return; |
| } |
| fail("Maximum domain name length is not respected"); |
| } |
| |
| /** |
| * Tests that calling {@linkplain ObjectName#setDomainPattern(boolean)} |
| * results in setting correct bits in {@linkplain ObjectName#_compressed_storage}. |
| */ |
| private static void testSetDomainPattern() throws Exception { |
| ObjectName on = getObjectName(); |
| |
| checkMask(DOMAIN_PATTERN, setDomainPattern, on); |
| } |
| |
| /** |
| * Tests that calling {@linkplain ObjectName#setPropertyListPattern(boolean)} |
| * results in setting correct bits in {@linkplain ObjectName#_compressed_storage}. |
| */ |
| private static void testSetPropertyListPattern() throws Exception { |
| ObjectName on = getObjectName(); |
| |
| checkMask(PROPLIST_PATTERN, setPropertyListPattern, on); |
| } |
| |
| /** |
| * Tests that calling {@linkplain ObjectName#setPropertyValuePattern(boolean)} |
| * results in setting correct bits in {@linkplain ObjectName#_compressed_storage}. |
| */ |
| private static void testSetPropertyValuePattern() throws Exception { |
| ObjectName on = getObjectName(); |
| |
| checkMask(PROPVAL_PATTERN, setPropertyValuePattern, on); |
| } |
| |
| /** |
| * Helper method to call {@linkplain ObjectName#setDomainLength(int)} |
| * method via reflection. |
| * @param len The domain name length |
| * @throws MalformedObjectNameException Propagated from |
| * {@linkplain ObjectName#setDomainLength(int)} invocation. |
| */ |
| private static void setDomainNameLength(int len) |
| throws MalformedObjectNameException { |
| try { |
| setDomainLengthM.invoke(getObjectName(), len); |
| } catch (InvocationTargetException e) { |
| Throwable cause = e.getCause(); |
| if (cause instanceof MalformedObjectNameException) { |
| throw (MalformedObjectNameException)cause; |
| } |
| throw new Error(cause); |
| } catch (IllegalAccessException | IllegalArgumentException e) { |
| throw new Error(e); |
| } |
| } |
| |
| /** |
| * Helper method to assert that a particular boolean setter affects only |
| * a particular bit in the {@linkplain ObjectName#_compressed_storage} field. |
| * @param mask bitmask for storing the boolean value |
| * @param setter setter method reference |
| * @param on {@linkplain ObjectName} instance |
| */ |
| private static void checkMask(int mask, Method setter, ObjectName on) |
| throws Exception { |
| int valBefore = compressedStorageFld.getInt(on); |
| setter.invoke(on, true); |
| int valAfter = compressedStorageFld.getInt(on); |
| |
| checkMask(mask, valAfter ^ valBefore); |
| |
| valBefore = valAfter; |
| setter.invoke(on, false); |
| valAfter = compressedStorageFld.getInt(on); |
| |
| checkMask(mask, valAfter ^ valBefore); |
| } |
| |
| /** |
| * Compare the changed bits with the given mask. |
| * @param mask bitmask |
| * @param val the changed bits; may be 0 if there was no change |
| */ |
| private static void checkMask(int mask, int val) { |
| if (val != 0 && val != mask) { |
| fail("Invalid mask: expecting '" + |
| Integer.toBinaryString(mask) + "' , received '" + |
| Integer.toBinaryString(val) + "'"); |
| } |
| } |
| |
| /** |
| * Helper method to obtain the value of a static field via reflection. |
| * @param name static field name |
| * @return static field value |
| */ |
| private static int getStaticIntFld(String name) throws Exception { |
| Field fld = ObjectName.class.getDeclaredField(name); |
| fld.setAccessible(true); |
| |
| return fld.getInt(null); |
| } |
| |
| private static void fail(String msg) { |
| throw new Error(msg); |
| } |
| } |