INT-1135 added HeaderFilter

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

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2002-2010 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 org.springframework.integration.core.Message;
+import org.springframework.integration.message.MessageBuilder;
+import org.springframework.util.Assert;
+
+/**
+ * Transformer that removes Message headers.
+ * 
+ * @author Mark Fisher
+ * @since 2.0
+ */
+public class HeaderFilter implements Transformer {
+
+	private final String[] headersToRemove;
+
+
+	public HeaderFilter(String... headersToRemove) {
+		Assert.notEmpty(headersToRemove, "At least one header name to remove is required.");
+		this.headersToRemove = headersToRemove;
+	}
+
+
+	public Message<?> transform(Message<?> message) {
+		MessageBuilder<?> builder = MessageBuilder.fromMessage(message);
+		for (String headerName : headersToRemove) {
+			builder.removeHeader(headerName);
+		}
+		return builder.build();
+	}
+
+}