Keep unused MemorySafeUndeclaredThrowableStrategy around in deprecated form for the 4.0.x line

Issue: SPR-11782

Author: jhoeller

spring-core/src/main/java/org/springframework/cglib/transform/impl/MemorySafeUndeclaredThrowableStrategy.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2002-2014 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.springframework.cglib.transform.impl;
+
+import org.springframework.cglib.core.ClassGenerator;
+import org.springframework.cglib.core.DefaultGeneratorStrategy;
+import org.springframework.cglib.core.TypeUtils;
+import org.springframework.cglib.transform.ClassTransformer;
+import org.springframework.cglib.transform.MethodFilter;
+import org.springframework.cglib.transform.MethodFilterTransformer;
+import org.springframework.cglib.transform.TransformingClassGenerator;
+
+/**
+ * Memory-safe variant of {@link UndeclaredThrowableStrategy} ported from CGLIB 3.1,
+ * introduced for using it in Spring before it was officially released in CGLIB.
+ *
+ * @author Phillip Webb
+ * @since 3.2.4
+ * @deprecated as of Spring 4.0.2, in favor of CGLIB 3.1's default strategy.
+ * Kept around for external code depending on it; to be removed in Spring 4.1.
+ */
+@Deprecated
+public class MemorySafeUndeclaredThrowableStrategy extends DefaultGeneratorStrategy {
+
+	private static final MethodFilter TRANSFORM_FILTER = new MethodFilter() {
+		public boolean accept(int access, String name, String desc, String signature, String[] exceptions) {
+			return (!TypeUtils.isPrivate(access) && name.indexOf('$') < 0);
+		}
+	};
+
+
+	private Class<?> wrapper;
+
+
+	public MemorySafeUndeclaredThrowableStrategy(Class<?> wrapper) {
+		this.wrapper = wrapper;
+	}
+
+
+	protected ClassGenerator transform(ClassGenerator cg) throws Exception {
+		ClassTransformer tr = new UndeclaredThrowableTransformer(wrapper);
+		tr = new MethodFilterTransformer(TRANSFORM_FILTER, tr);
+		return new TransformingClassGenerator(cg, tr);
+	}
+
+}