1 files changed, 53 insertions, 0 deletions
diff --git a/sdc-distribution-client/src/main/java/org/onap/sdc/utils/CaseInsensitiveMap.java b/sdc-distribution-client/src/main/java/org/onap/sdc/utils/CaseInsensitiveMap.java
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+++ b/sdc-distribution-client/src/main/java/org/onap/sdc/utils/CaseInsensitiveMap.java
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+/*-
+ * ============LICENSE_START=======================================================
+ * sdc-distribution-client
+ * ================================================================================
+ * Copyright (C) 2023 Deutsche Telekom Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.sdc.utils;
+
+import java.util.HashMap;
+
+/**
+ * A custom map implementation that allows case-insensitive key checks
+ *
+ * This is used for response/request headers that can be transformed to
+ * lowercase by the ingress/envoy sidecar.
+ * HTTP headers are case-insensitive according to RFC 2616
+ * 
+ * @author mszwalkiewicz
+ */
+public class CaseInsensitiveMap<K, V> extends HashMap<K, V> {
+
+    public boolean containsCaseInsensitiveKey(String key) {
+        for (K existingKey : keySet()) {
+            if (existingKey.toString().equalsIgnoreCase(key)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public V getCaseInsensitiveKey(String key) {
+        for (K existingKey : keySet()) {
+            if (existingKey.toString().equalsIgnoreCase(key)) {
+                return super.get(existingKey);
+            }
+        }
+        return null;
+    }
+}