--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2016-2018 Ericsson. 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.plugins.context.schema.avro;
+
+import java.util.Map.Entry;
+
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+
+/**
+ * This static final class contains utility methods for Avro schemas.
+ *
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public final class AvroSchemaKeyTranslationUtilities {
+ // Constants for key replacements
+ private static final String DOT_STRING = "\\.";
+ private static final String DOT_STRING_REPLACEMENT = "_DoT_";
+ private static final String DASH_STRING = "-";
+ private static final String DASH_STRING_REPLACEMENT = "_DasH_";
+
+ /**
+ * Default constructor to avoid subclassing.
+ */
+ private AvroSchemaKeyTranslationUtilities() {}
+
+ /**
+ * Translate characters in JSON keys to values that are legal in Avro. Avro names must start
+ * with [A-Za-z_] and subsequently contain only [A-Za-z0-9_]
+ *
+ * @param jsonString The JSON string to translate
+ * @param revert True if we want to revert the field names to their original values
+ * @return the translated JSON string
+ */
+ public static String translateIllegalKeys(final String jsonString, final boolean revert) {
+ if (jsonString == null) {
+ return jsonString;
+ }
+
+ // Create a JSON element for the incoming JSON string
+ final JsonElement jsonElement =
+ new GsonBuilder().serializeNulls().create().fromJson(jsonString, JsonElement.class);
+
+ final JsonElement translatedJsonElement = translateIllegalKeys(jsonElement, revert);
+
+ return new GsonBuilder().serializeNulls().create().toJson(translatedJsonElement);
+ }
+
+ /**
+ * Translate characters in JSON keys to values that are legal in Avro. Avro names must start
+ * with [A-Za-z_] and subsequently contain only [A-Za-z0-9_]
+ *
+ * @param jsonElement The JSON element to translate
+ * @param revert True if we want to revert the field names to their original values
+ * @return the translated JSON element
+ */
+ public static JsonElement translateIllegalKeys(final JsonElement jsonElement, final boolean revert) {
+ // We only act on JSON objects and arrays
+ if (jsonElement.isJsonObject()) {
+ return translateIllegalKeys(jsonElement.getAsJsonObject(), revert);
+ } else if (jsonElement.isJsonArray()) {
+ return translateIllegalKeys(jsonElement.getAsJsonArray(), revert);
+ } else {
+ return jsonElement;
+ }
+ }
+
+ /**
+ * Translate characters in JSON keys to values that are legal in Avro. Avro names must start
+ * with [A-Za-z_] and subsequently contain only [A-Za-z0-9_]
+ *
+ * @param jsonObject The JSON object to translate
+ * @param revert True if we want to revert the field names to their original values
+ * @return the translated JSON element
+ */
+ public static JsonElement translateIllegalKeys(final JsonObject jsonObject, final boolean revert) {
+ final JsonObject newJsonObject = new JsonObject();
+
+ for (final Entry<String, JsonElement> jsonObjectEntry : jsonObject.entrySet()) {
+ newJsonObject.add(translateIllegalKey(jsonObjectEntry.getKey(), revert),
+ translateIllegalKeys(jsonObjectEntry.getValue(), revert));
+ }
+
+ return newJsonObject;
+ }
+
+ /**
+ * Translate characters in JSON keys to values that are legal in Avro. Avro names must start
+ * with [A-Za-z_] and subsequently contain only [A-Za-z0-9_]
+ *
+ * @param jsonArray The JSON array to translate
+ * @param revert True if we want to revert the field names to their original values
+ * @return the translated JSON element
+ */
+ public static JsonElement translateIllegalKeys(final JsonArray jsonArray, final boolean revert) {
+ final JsonArray newJsonArray = new JsonArray();
+
+ for (int i = 0; i < jsonArray.size(); i++) {
+ newJsonArray.add(translateIllegalKeys(jsonArray.get(i), revert));
+ }
+
+ return newJsonArray;
+ }
+
+ /**
+ * Translate characters in a single JSON key to values that are legal in Avro. Avro names must
+ * start with [A-Za-z_] and subsequently contain only [A-Za-z0-9_]
+ *
+ * @param key The key to translate
+ * @param revert True if we want to revert the field names to their original values
+ * @return the translated key
+ */
+ private static String translateIllegalKey(final String key, final boolean revert) {
+ if (revert) {
+ return key.replaceAll(DOT_STRING_REPLACEMENT, DOT_STRING).replaceAll(DASH_STRING_REPLACEMENT, DASH_STRING);
+ } else {
+ return key.replaceAll(DOT_STRING, DOT_STRING_REPLACEMENT).replaceAll(DASH_STRING, DASH_STRING_REPLACEMENT);
+ }
+ }
+}
Code Review / policy / apex-pdp.git / blobdiff