+ commit actual jboss adapter

org.springframework.context/src/main/java/org/springframework/instrument/classloading/jboss/JBossTranslatorAdapter.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2006-2009 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.instrument.classloading.jboss;
+
+import java.lang.instrument.ClassFileTransformer;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.security.ProtectionDomain;
+
+/**
+ * Adapter that implements JBoss Translator interface, delegating to a
+ * standard JDK {@link ClassFileTransformer} underneath.
+ * 
+ * <p>To avoid compile time checks again the vendor API, a dynamic proxy is
+ * being used.
+ * 
+ * @author Costin Leau
+ */
+class JBossTranslatorAdapter implements InvocationHandler {
+
+	private final ClassFileTransformer transformer;
+
+	/**
+	 * Creates a new {@link JBossTranslatorAdapter}.
+	 * @param transformer the {@link ClassFileTransformer} to be adapted (must
+	 * not be <code>null</code>)
+	 */
+	public JBossTranslatorAdapter(ClassFileTransformer transformer) {
+		this.transformer = transformer;
+	}
+
+	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+		String name = method.getName();
+
+		if ("equals".equals(name)) {
+			return (Boolean.valueOf(proxy == args[0]));
+		} else if ("hashCode".equals(name)) {
+			return hashCode();
+		} else if ("toString".equals(name)) {
+			return toString();
+		} else if ("transform".equals(name)) {
+			return transform((ClassLoader) args[0], (String) args[1], (Class<?>) args[2], (ProtectionDomain) args[3],
+					(byte[]) args[4]);
+		} else if ("unregisterClassLoader".equals(name)) {
+			unregisterClassLoader((ClassLoader) args[0]);
+			return null;
+
+		} else {
+			throw new IllegalArgumentException("Unknown method: " + method);
+		}
+	}
+
+	public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,
+			ProtectionDomain protectionDomain, byte[] classfileBuffer) throws Exception {
+		return transformer.transform(loader, className, classBeingRedefined, protectionDomain, classfileBuffer);
+	}
+
+	public void unregisterClassLoader(ClassLoader loader) {
+	}
+
+	@Override
+	public String toString() {
+		StringBuilder builder = new StringBuilder(getClass().getName());
+		builder.append(" for transformer: ");
+		builder.append(this.transformer);
+		return builder.toString();
+	}
+}