implement config priorities

Author: frantuma

modules/swagger-codegen/src/main/java/io/swagger/codegen/Codegen.java

@@ -122,11 +122,20 @@ public static void main(String[] args) {
 
     public static List<CodegenConfig> getExtensions() {
         ServiceLoader<CodegenConfig> loader = ServiceLoader.load(CodegenConfig.class);
-        List<CodegenConfig> output = new ArrayList<CodegenConfig>();
-        for (CodegenConfig aLoader : loader) {
-            output.add(aLoader);
+        Map<String, CodegenConfig> output = new HashMap<>();
+
+        for (CodegenConfig config : loader) {
+            if (output.get(config.getName()) == null) {
+                output.put(config.getName(), config);
+            } else if (config.isPrivileged() && !output.get(config.getName()).isPrivileged()) {
+                output.put(config.getName(), config);
+            } else if (output.get(config.getName()).isPrivileged() && !config.isPrivileged()) {
+                // skip
+            } else if (config.getPriority() > output.get(config.getName()).getPriority()) {
+                output.put(config.getName(), config);
+            }
         }
-        return output;
+        return new ArrayList<>(output.values());
     }
 
     static void usage(Options options) {

modules/swagger-codegen/src/main/java/io/swagger/codegen/CodegenConfig.java

@@ -239,4 +239,16 @@ public interface CodegenConfig {
     boolean defaultIgnoreImportMappingOption();
 
     boolean isUsingFlattenSpec();
+
+    default boolean isPrivileged() {
+        return false;
+    }
+
+    default int getPriority() {
+        return Integer.MIN_VALUE;
+    }
+
+    default String getCodeName() {
+        return getName();
+    }
 }

modules/swagger-codegen/src/main/java/io/swagger/codegen/CodegenConfigLoader.java

@@ -15,14 +15,25 @@ public static CodegenConfig forName(String name) {
         ServiceLoader<CodegenConfig> loader = load(CodegenConfig.class);
 
         StringBuilder availableConfigs = new StringBuilder();
-
+        CodegenConfig current = null;
         for (CodegenConfig config : loader) {
+
             if (config.getName().equals(name)) {
-                return config;
+                if (current == null) {
+                    current = config;
+                } else if (config.isPrivileged() && !current.isPrivileged()) {
+                    current = config;
+                } else if (current.isPrivileged() && !config.isPrivileged()) {
+                    // skip
+                } else if (config.getPriority() > current.getPriority()) {
+                    current = config;
+                }
             }
-
             availableConfigs.append(config.getName()).append("\n");
         }
+        if (current != null) {
+            return current;
+        }
 
         // else try to load directly
         try {

modules/swagger-codegen/src/main/java/io/swagger/codegen/MetaGenerator.java

@@ -39,11 +39,20 @@ public static void main(String[] args) {
 
     public static List<CodegenConfig> getExtensions() {
         ServiceLoader<CodegenConfig> loader = ServiceLoader.load(CodegenConfig.class);
-        List<CodegenConfig> output = new ArrayList<CodegenConfig>();
+        Map<String, CodegenConfig> output = new HashMap<>();
+
         for (CodegenConfig config : loader) {
-            output.add(config);
+            if (output.get(config.getName()) == null) {
+                output.put(config.getName(), config);
+            } else if (config.isPrivileged() && !output.get(config.getName()).isPrivileged()) {
+                output.put(config.getName(), config);
+            } else if (output.get(config.getName()).isPrivileged() && !config.isPrivileged()) {
+                // skip
+            } else if (config.getPriority() > output.get(config.getName()).getPriority()) {
+                output.put(config.getName(), config);
+            }
         }
-        return output;
+        return new ArrayList<>(output.values());
     }
 
     static void usage(Options options) {

pom.xml

@@ -1058,7 +1058,7 @@
     </repositories>
     <properties>
         <maven.compiler.release>8</maven.compiler.release>
-        <swagger-parser-version>1.0.70</swagger-parser-version>
+        <swagger-parser-version>1.0.71</swagger-parser-version>
         <scala-version>2.11.1</scala-version>
         <felix-version>3.3.0</felix-version>
         <swagger-core-version>1.6.14</swagger-core-version>
@@ -1075,7 +1075,7 @@
         Codegen support of Java 8 should be removed if updating to 1.16+
          -->
         <jmustache-version>1.15</jmustache-version>
-        <testng-version>7.10.1</testng-version>
+        <testng-version>7.10.2</testng-version>
         <surefire-version>3.0.0</surefire-version>
         <jmockit-version>1.49</jmockit-version>
         <mockito-version>5.11.0</mockito-version>