Output warning when deserializing object stream with no JEP-290 filte…

…r defined

src/main/java/org/apache/ibatis/cache/decorators/SerializedCache.java

@@ -27,6 +27,7 @@
 import org.apache.ibatis.cache.Cache;
 import org.apache.ibatis.cache.CacheException;
 import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.io.SerialFilterChecker;
 
 /**
  * @author Clinton Begin
@@ -96,6 +97,7 @@ private byte[] serialize(Serializable value) {
   }
 
   private Serializable deserialize(byte[] value) {
+    SerialFilterChecker.check();
     Serializable result;
     try (ByteArrayInputStream bis = new ByteArrayInputStream(value);
         ObjectInputStream ois = new CustomObjectInputStream(bis)) {

src/main/java/org/apache/ibatis/executor/loader/AbstractSerialStateHolder.java

@@ -1,5 +1,5 @@
 /**
- *    Copyright 2009-2019 the original author or authors.
+ *    Copyright 2009-2020 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -19,20 +19,19 @@
 import java.io.ByteArrayOutputStream;
 import java.io.Externalizable;
 import java.io.IOException;
-import java.io.InputStream;
 import java.io.InvalidClassException;
 import java.io.ObjectInput;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutput;
 import java.io.ObjectOutputStream;
-import java.io.ObjectStreamClass;
 import java.io.ObjectStreamException;
 import java.io.StreamCorruptedException;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.ibatis.io.SerialFilterChecker;
 import org.apache.ibatis.reflection.factory.ObjectFactory;
 
 /**
@@ -108,8 +107,10 @@ protected final Object readResolve() throws ObjectStreamException {
       return this.userBean;
     }
 
+    SerialFilterChecker.check();
+
     /* First run */
-    try (ObjectInputStream in = new LookAheadObjectInputStream(new ByteArrayInputStream(this.userBeanBytes))) {
+    try (ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(this.userBeanBytes))) {
       this.userBean = in.readObject();
       this.unloadedProperties = (Map<String, ResultLoaderMap.LoadPair>) in.readObject();
       this.objectFactory = (ObjectFactory) in.readObject();
@@ -130,33 +131,4 @@ protected final Object readResolve() throws ObjectStreamException {
 
   protected abstract Object createDeserializationProxy(Object target, Map<String, ResultLoaderMap.LoadPair> unloadedProperties, ObjectFactory objectFactory,
           List<Class<?>> constructorArgTypes, List<Object> constructorArgs);
-
-  private static class LookAheadObjectInputStream extends ObjectInputStream {
-    private static final List<String> blacklist = Arrays.asList(
-        "org.apache.commons.beanutils.BeanComparator",
-        "org.apache.commons.collections.functors.InvokerTransformer",
-        "org.apache.commons.collections.functors.InstantiateTransformer",
-        "org.apache.commons.collections4.functors.InvokerTransformer",
-        "org.apache.commons.collections4.functors.InstantiateTransformer",
-        "org.codehaus.groovy.runtime.ConvertedClosure",
-        "org.codehaus.groovy.runtime.MethodClosure",
-        "org.springframework.beans.factory.ObjectFactory",
-        "org.springframework.transaction.jta.JtaTransactionManager",
-        "com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl");
-
-    public LookAheadObjectInputStream(InputStream in) throws IOException {
-      super(in);
-    }
-
-    @Override
-    protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
-      String className = desc.getName();
-      if (blacklist.contains(className)) {
-        throw new InvalidClassException(className, "Deserialization is not allowed for security reasons. "
-            + "It is strongly recommended to configure the deserialization filter provided by JDK. "
-            + "See http://openjdk.java.net/jeps/290 for the details.");
-      }
-      return super.resolveClass(desc);
-    }
-  }
 }

src/main/java/org/apache/ibatis/io/SerialFilterChecker.java

@@ -0,0 +1,54 @@
+/**
+ *    Copyright 2009-2020 the original author or authors.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+package org.apache.ibatis.io;
+
+import java.security.Security;
+
+import org.apache.ibatis.logging.Log;
+import org.apache.ibatis.logging.LogFactory;
+
+public final class SerialFilterChecker {
+  private static final Log log = LogFactory.getLog(SerialFilterChecker.class);
+  /* Property key for the JEP-290 serialization filters */
+  private static final String JDK_SERIAL_FILTER = "jdk.serialFilter";
+  private static final boolean SERIAL_FILTER_MISSING;
+  private static boolean firstInvocation = true;
+
+  static {
+    Object serialFilter;
+    try {
+      Class<?> objectFilterConfig = Class.forName("java.io.ObjectInputFilter$Config");
+      serialFilter = objectFilterConfig.getMethod("getSerialFilter").invoke(null);
+    } catch (ReflectiveOperationException e) {
+      // Java 1.8
+      serialFilter = System.getProperty(JDK_SERIAL_FILTER, Security.getProperty(JDK_SERIAL_FILTER));
+    }
+    SERIAL_FILTER_MISSING = serialFilter == null;
+  }
+
+  public static void check() {
+    if (firstInvocation && SERIAL_FILTER_MISSING) {
+      firstInvocation = false;
+      log.warn(
+          "As you are using functionality that deserializes object streams, it is recommended to define the JEP-290 serial filter. "
+              + "Please refer to https://docs.oracle.com/pls/topic/lookup?ctx=javase15&id=GUID-8296D8E8-2B93-4B9A-856E-0A65AF9B8C66");
+    }
+  }
+
+  private SerialFilterChecker() {
+  }
+}