Added SimpleHeaderEnricherParser.

org.springframework.integration/src/main/java/org/springframework/integration/transformer/config/SimpleHeaderEnricherParser.java

@@ -0,0 +1,85 @@
+/*
+ * 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.config;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.w3c.dom.Element;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+
+import org.springframework.beans.factory.support.BeanDefinitionBuilder;
+import org.springframework.beans.factory.xml.ParserContext;
+import org.springframework.integration.transformer.HeaderEnricher;
+import org.springframework.integration.transformer.Transformer;
+import org.springframework.util.ObjectUtils;
+
+/**
+ * @author Mark Fisher
+ */
+public class SimpleHeaderEnricherParser extends AbstractTransformerParser {
+
+	private static String[] ineligibleHeaderNames = new String[] {
+		"id", "input-channel", "output-channel", "overwrite"
+	};
+
+
+	private final String prefix;
+
+
+	public SimpleHeaderEnricherParser() {
+		this(null);
+	}
+
+	public SimpleHeaderEnricherParser(String prefix) {
+		this.prefix = prefix;
+	}
+
+
+	@Override
+	protected Class<? extends Transformer> getTransformerClass() {
+		return HeaderEnricher.class;
+	}
+
+	protected boolean isEligibleHeaderName(String headerName) {
+		return !(ObjectUtils.containsElement(ineligibleHeaderNames, headerName));
+	}
+
+	protected boolean shouldOverwrite(Element element) {
+		return "true".equals(element.getAttribute("overwrite").toLowerCase());
+	}
+
+	@Override
+	protected void parseTransformer(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
+		Map<String, Object> headersToAdd = new HashMap<String, Object>();
+		NamedNodeMap nodeMap = element.getAttributes();
+		for (int i = 0; i < nodeMap.getLength(); i++) {
+			Node node = nodeMap.item(i);
+			String name = node.getNodeName();
+			if (this.isEligibleHeaderName(name)) {
+				headersToAdd.put(name, node.getNodeValue());				
+			}
+		}
+		builder.addConstructorArgValue(headersToAdd);
+		builder.addPropertyValue("overwrite", this.shouldOverwrite(element));
+		if (this.prefix != null) {
+			builder.addPropertyValue("prefix", this.prefix);
+		}
+	}
+
+}