1 files changed, 134 insertions, 0 deletions
diff --git a/search-data-service/src/main/java/org/onap/aai/sa/searchdbabstraction/util/DocumentSchemaUtil.java b/search-data-service/src/main/java/org/onap/aai/sa/searchdbabstraction/util/DocumentSchemaUtil.java
new file mode 100644
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--- /dev/null
+++ b/search-data-service/src/main/java/org/onap/aai/sa/searchdbabstraction/util/DocumentSchemaUtil.java
@@ -0,0 +1,134 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017-2018 Amdocs
+ * ================================================================================
+ * 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.aai.sa.searchdbabstraction.util;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
+import org.apache.commons.io.IOUtils;
+import org.onap.aai.sa.rest.DocumentFieldSchema;
+import org.onap.aai.sa.rest.DocumentSchema;
+
+public class DocumentSchemaUtil {
+
+    private static String dynamicCustomMapping = null;
+    private static final String DYNAMIC_CUSTOM_TEMPALTE_FILE =
+            System.getProperty("CONFIG_HOME") + File.separator + "dynamic-custom-template.json";
+
+    private DocumentSchemaUtil() { // Do not instantiate
+    }
+
+    public static String generateDocumentMappings(String documentSchema) throws IOException {
+        // Unmarshal the json content into a document schema object.
+        ObjectMapper mapper = new ObjectMapper();
+        DocumentSchema schema = mapper.readValue(documentSchema, DocumentSchema.class);
+        return generateDocumentMappings(schema);
+    }
+
+    public static String generateDocumentMappings(DocumentSchema schema) throws IOException {
+        // Adding dynamic template to add fielddata=true to dynamic fields of type "string"
+        // in order to avoid aggregation queries breaking in ESv6.1.2
+        if (dynamicCustomMapping == null) {
+            try {
+                dynamicCustomMapping = IOUtils.toString(new FileInputStream(DYNAMIC_CUSTOM_TEMPALTE_FILE), "UTF-8")
+                        .replaceAll("\\s+", "");
+            } catch (IOException e) {
+                throw new IOException(
+                        "Dynamic Custom template configuration went wrong! Please check for the correct template file.",
+                        e);
+            }
+        }
+
+        // Now, generate the Elastic Search mapping json and return it.
+        StringBuilder sb = new StringBuilder();
+        sb.append("{");
+        // Adding custom mapping which adds fielddata=true to dynamic fields of type "string"
+        sb.append(dynamicCustomMapping != null ? dynamicCustomMapping : "");
+        sb.append("\"properties\": {");
+
+        generateFieldMappings(schema.getFields(), sb);
+
+        sb.append("}");
+        sb.append("}");
+
+        return sb.toString();
+    }
+
+
+    private static void generateFieldMappings(List<DocumentFieldSchema> fields, StringBuilder sb) {
+
+        AtomicBoolean firstField = new AtomicBoolean(true);
+
+        for (DocumentFieldSchema field : fields) {
+
+            // If this isn't the first field in the list, prepend it with a ','
+            if (!firstField.compareAndSet(true, false)) {
+                sb.append(", ");
+            }
+
+            // Now, append the translated field contents.
+            generateFieldMapping(field, sb);
+        }
+    }
+
+    private static void generateFieldMapping(DocumentFieldSchema fieldSchema, StringBuilder sb) {
+
+        sb.append("\"").append(fieldSchema.getName()).append("\": {");
+
+        // The field type is mandatory.
+        sb.append("\"type\": \"").append(fieldSchema.getDataType()).append("\"");
+
+        // For date type fields we may optionally supply a format specifier.
+        if (fieldSchema.getDataType().equals("date") && fieldSchema.getFormat() != null) {
+            sb.append(", \"format\": \"").append(fieldSchema.getFormat()).append("\"");
+        }
+
+        // If the index field was specified, then append it.
+        if (fieldSchema.getSearchable() != null) {
+            sb.append(", \"index\": \"").append(fieldSchema.getSearchable() ? "analyzed" : "not_analyzed").append("\"");
+        }
+
+        // If a search analyzer was specified, then append it.
+        if (fieldSchema.getSearchAnalyzer() != null) {
+            sb.append(", \"search_analyzer\": \"").append(fieldSchema.getSearchAnalyzer()).append("\"");
+        }
+
+        // If an indexing analyzer was specified, then append it.
+        if (fieldSchema.getIndexAnalyzer() != null) {
+            sb.append(", \"analyzer\": \"").append(fieldSchema.getIndexAnalyzer()).append("\"");
+        }
+
+
+        if (fieldSchema.getDataType().equals("nested")) {
+
+            sb.append(", \"properties\": {");
+            generateFieldMappings(fieldSchema.getSubFields(), sb);
+            sb.append("}");
+        }
+
+        sb.append("}");
+    }
+
+}
+