NONRTRIC - Implement DMaaP mediator producer service in Java

[nonrtric.git] / dmaap-adaptor-java / src / main / java / org / oran / dmaapadapter / controllers / ErrorResponse.java

diff --git a/dmaap-adaptor-java/src/main/java/org/oran/dmaapadapter/controllers/ErrorResponse.java b/dmaap-adaptor-java/src/main/java/org/oran/dmaapadapter/controllers/ErrorResponse.java
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+/*-
+ * ========================LICENSE_START=================================
+ * O-RAN-SC
+ * %%
+ * Copyright (C) 2021 Nordix Foundation
+ * %%
+ * 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.oran.dmaapadapter.controllers;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.annotations.SerializedName;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+import org.oran.dmaapadapter.exceptions.ServiceException;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import reactor.core.publisher.Mono;
+
+public class ErrorResponse {
+    private static Gson gson = new GsonBuilder() //
+            .create(); //
+
+    // Returned as body for all failed REST calls
+    @Schema(name = "error_information", description = "Problem as defined in https://tools.ietf.org/html/rfc7807")
+    public static class ErrorInfo {
+        @SerializedName("type")
+        private String type = "about:blank";
+
+        @SerializedName("title")
+        private String title = null;
+
+        @SerializedName("status")
+        private final Integer status;
+
+        @SerializedName("detail")
+        private String detail = null;
+
+        @SerializedName("instance")
+        private String instance = null;
+
+        public ErrorInfo(String detail, Integer status) {
+            this.detail = detail;
+            this.status = status;
+        }
+
+        @Schema(example = "503",
+                description = "The HTTP status code generated by the origin server for this occurrence of the problem. ")
+        public Integer getStatus() {
+            return status;
+        }
+
+        @Schema(example = "Policy type not found",
+                description = " A human-readable explanation specific to this occurrence of the problem.")
+        public String getDetail() {
+            return this.detail;
+        }
+
+    }
+
+    @Schema(name = "message", description = "message")
+    public final String message;
+
+    ErrorResponse(String message) {
+        this.message = message;
+    }
+
+    static Mono<ResponseEntity<Object>> createMono(String text, HttpStatus code) {
+        return Mono.just(create(text, code));
+    }
+
+    static Mono<ResponseEntity<Object>> createMono(Exception e, HttpStatus code) {
+        return createMono(e.toString(), code);
+    }
+
+    public static ResponseEntity<Object> create(String text, HttpStatus code) {
+        ErrorInfo p = new ErrorInfo(text, code.value());
+        String json = gson.toJson(p);
+        HttpHeaders headers = new HttpHeaders();
+        headers.setContentType(MediaType.APPLICATION_PROBLEM_JSON);
+        return new ResponseEntity<>(json, headers, code);
+    }
+
+    public static ResponseEntity<Object> create(Throwable e, HttpStatus code) {
+        if (e instanceof RuntimeException) {
+            code = HttpStatus.INTERNAL_SERVER_ERROR;
+        } else if (e instanceof ServiceException) {
+            ServiceException se = (ServiceException) e;
+            if (se.getHttpStatus() != null) {
+                code = se.getHttpStatus();
+            }
+        }
+        return create(e.toString(), code);
+    }
+
+}