INT-1214 added DefaultHttpHeaderMapper

spring-integration-http/src/main/java/org/springframework/integration/http/DefaultHttpHeaderMapper.java

@@ -0,0 +1,60 @@
+/*
+ * 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.http;
+
+import java.util.Map;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.integration.core.MessageHeaders;
+import org.springframework.integration.message.HeaderMapper;
+
+/**
+ * Default {@link HeaderMapper} implementation for HTTP.
+ * 
+ * @author Mark Fisher
+ * @since 2.0
+ */
+public class DefaultHttpHeaderMapper implements HeaderMapper<HttpHeaders> {
+
+	public void fromHeaders(MessageHeaders headers, HttpHeaders target) {
+		for (String name : headers.keySet()) {
+			if (!name.startsWith(MessageHeaders.PREFIX)) {
+				Object value = headers.get(name);
+				if (value instanceof String) {
+					target.add(name, (String) value);
+				}
+				else if (value instanceof String[]) {
+					for (String next : (String[]) value) {
+						target.add(name, next);
+					}
+				}
+				else if (value instanceof Iterable<?>) {
+					for (Object next : (Iterable<?>) value) {
+						if (next instanceof String) {
+							target.add(name, (String) next);
+						}
+					}
+				}
+			}
+		}
+	}
+
+	public Map<String, ?> toHeaders(HttpHeaders source) {
+		return source;
+	}
+
+}