Added PayloadSerializingTransformer and PayloadDeserializingTransformer (INT-513).

org.springframework.integration/src/main/java/org/springframework/integration/transformer/PayloadDeserializingTransformer.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2002-2008 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.integration.transformer;
+
+import java.io.ByteArrayInputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectStreamException;
+
+/**
+ * Transformer that deserializes the inbound byte array payload to an object.
+ * <p>The byte array payload must be a result of serialization.
+ * 
+ * @author Mark Fisher
+ * @since 1.0.1
+ */
+public class PayloadDeserializingTransformer extends AbstractPayloadTransformer<byte[], Object> {
+
+	@Override
+	protected Object transformPayload(byte[] payload) throws Exception {
+		ByteArrayInputStream byteStream = new ByteArrayInputStream(payload);
+		ObjectInputStream objectStream = null;
+		try {
+			objectStream = new ObjectInputStream(byteStream);
+			return objectStream.readObject();
+		}
+		catch (ObjectStreamException e) {
+			throw new IllegalArgumentException(
+					"Failed to deserialize payload. Is the byte array a result of Object serialization?", e);
+		}
+		finally {
+			try {
+				objectStream.close();
+			}
+			catch (Exception e) {
+				// ignore
+			}
+		}
+	}
+
+}

org.springframework.integration/src/main/java/org/springframework/integration/transformer/PayloadSerializingTransformer.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2002-2008 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.integration.transformer;
+
+import java.io.ByteArrayOutputStream;
+import java.io.ObjectOutputStream;
+import java.io.Serializable;
+
+import org.springframework.util.Assert;
+
+/**
+ * Transformer that serializes the inbound payload into a byte array.
+ * <p>The payload instance must be Serializable.
+ * 
+ * @author Mark Fisher
+ * @since 1.0.1
+ */
+public class PayloadSerializingTransformer extends AbstractPayloadTransformer<Object, byte[]> {
+
+	@Override
+	protected byte[] transformPayload(Object payload) throws Exception {
+		Assert.isTrue(payload instanceof Serializable, this.getClass().getName()
+				+ " requires a Serializable payload, but received [" + payload.getClass().getName() + "]");
+		ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
+		ObjectOutputStream objectStream = new ObjectOutputStream(byteStream);
+		objectStream.writeObject(payload);
+		objectStream.flush();
+		objectStream.close();
+		return byteStream.toByteArray();
+	}
+
+}