Feature - Helidon CDI integration. #3649

redisson/src/main/java/org/redisson/config/PropertiesConvertor.java

+/**
+ * Copyright (c) 2013-2021 Nikita Koksharov
+ *
+ * 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 org.redisson.config;
+
+import java.util.*;
+import java.util.function.Function;
+
+/**
+ *
+ * @author Nikita Koksharov
+ *
+ */
+public class PropertiesConvertor {
+
+    public static String toYaml(String suffix, Iterable<String> propertyNames, Function<String, String> resolver) {
+        Map<String, Object> map = new HashMap<>();
+        for (String propertyName : propertyNames) {
+            if (!propertyName.startsWith(suffix)) {
+                continue;
+            }
+
+            List<String> pps = Arrays.asList(propertyName.replace(suffix, "").split("\\."));
+            String value = resolver.apply(propertyName);
+            if (pps.size() == 2) {
+                Map<String, Object> m = (Map<String, Object>) map.computeIfAbsent(pps.get(0), k -> new HashMap<String, Object>());
+                m.put(pps.get(1), value);
+            } else {
+                map.put(pps.get(0), value);
+            }
+        }
+
+        StringBuilder yaml = new StringBuilder();
+        for (Map.Entry<String, Object> entry : map.entrySet()) {
+            if (entry.getValue() instanceof Map) {
+                yaml.append(convertKey(entry.getKey())).append(":").append("\n");
+
+                Map<String, Object> m = (Map) entry.getValue();
+                for (Map.Entry<String, Object> subEntry : m.entrySet()) {
+                    yaml.append("  ").append(convertKey(subEntry.getKey())).append(": ");
+                    addValue(yaml, subEntry);
+                    yaml.append("\n");
+                }
+            } else {
+                yaml.append(convertKey(entry.getKey())).append(": ");
+                addValue(yaml, entry);
+                yaml.append("\n");
+            }
+        }
+        return yaml.toString();
+    }
+
+    private static String convertKey(String key) {
+        if (!key.contains("-")) {
+            return key;
+        }
+
+        String[] parts = key.split("-");
+        StringBuilder builder = new StringBuilder();
+        builder.append(parts[0]);
+        for (int i = 1; i < parts.length; i++) {
+            builder.append(parts[i].substring(0, 1).toUpperCase())
+                    .append(parts[i].substring(1));
+        }
+        return builder.toString();
+    }
+
+    private static void addValue(StringBuilder yaml, Map.Entry<String, Object> subEntry) {
+        String value = (String) subEntry.getValue();
+        if (value.contains(",")) {
+            for (String part : value.split(",")) {
+                yaml.append("\n  ").append("- \"").append(part.trim()).append("\"");
+            }
+            return;
+        }
+
+        if ("codec".equals(subEntry.getKey())
+                || "loadBalancer".equals(subEntry.getKey())) {
+            value = "!<" + value + "> {}";
+        } else {
+            try {
+                Long.parseLong(value);
+            } catch (NumberFormatException e) {
+                if (!Boolean.parseBoolean(value)
+                        && !"null".equals(value)) {
+                    value = "\"" + value + "\"";
+                }
+            }
+        }
+
+        yaml.append(value);
+    }
+
+}