ProblemDetail with cause information as nested ProblemDetail

fix# jhipster/generator-jhipster#19991

jhipster-framework/src/main/java/tech/jhipster/web/rest/errors/ProblemDetailWithCause.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2016-2022 the original author or authors from the JHipster project.
+ *
+ * This file is part of the JHipster project, see https://www.jhipster.tech/
+ * for more information.
+ *
+ * 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 tech.jhipster.web.rest.errors;
+
+import java.net.URI;
+import java.util.HashMap;
+import java.util.Map;
+import org.springframework.http.ProblemDetail;
+
+/*
+ * Class that extends Spring's ProblemDetail and has a Builder implementation.
+ */
+public class ProblemDetailWithCause  extends ProblemDetail {
+	private ProblemDetailWithCause cause;
+
+	ProblemDetailWithCause(int rawStatus) {
+		super(rawStatus);
+	}
+
+    ProblemDetailWithCause(int rawStatus, ProblemDetailWithCause cause) {
+		super(rawStatus);
+        this.cause = cause;
+	}
+
+	public ProblemDetailWithCause getCause() {
+		return cause;
+	}
+
+	public void setCause(ProblemDetailWithCause cause) {
+		this.cause = cause;
+	}
+
+    // The missing builder from Spring
+    public static class ProblemDetailWithCauseBuilder {
+        private static final URI BLANK_TYPE = URI.create("about:blank");
+        // From Springs Problem Detail
+        private URI type = BLANK_TYPE;
+        private String title;
+        private int status;
+        private String detail;
+        private URI instance;
+        private Map<String, Object> properties = new HashMap<>();
+        private ProblemDetailWithCause cause;
+
+        public static ProblemDetailWithCauseBuilder instance(){
+            return new ProblemDetailWithCauseBuilder();
+        }
+
+        public ProblemDetailWithCauseBuilder withType(URI type) {
+            this.type = type;
+            return this;
+        }
+
+        public ProblemDetailWithCauseBuilder withTitle(String title) {
+            this.title = title;
+            return this;
+        }
+
+        public ProblemDetailWithCauseBuilder withStatus(int status) {
+            this.status = status;
+            return this;
+        }
+
+        public ProblemDetailWithCauseBuilder withDetail(String detail) {
+            this.detail = detail;
+            return this;
+        }
+
+        public ProblemDetailWithCauseBuilder withInstance(URI instance) {
+            this.instance = instance;
+            return this;
+        }
+
+        public ProblemDetailWithCauseBuilder withCause(ProblemDetailWithCause cause) {
+            this.cause = cause;
+            return this;
+        }
+
+        public ProblemDetailWithCauseBuilder withProperties(Map<String, Object> properties) {
+            this.properties = properties;
+            return this;
+        }
+
+        public ProblemDetailWithCauseBuilder withProperty(String key, Object value) {
+            this.properties.put(key, value);
+            return this;
+        }
+
+        public ProblemDetailWithCause build() {
+            ProblemDetailWithCause cause = new ProblemDetailWithCause(this.status);
+            cause.setType(this.type);
+            cause.setTitle(this.title);
+            cause.setDetail(this.detail);
+            cause.setInstance(this.instance);
+            this.properties.forEach(cause::setProperty);
+            cause.setCause(this.cause);
+            return cause;
+        }
+    }
+}