[core] cleanup: remove OpenAPI parameter from CodegenConfig methods (OpenAPITools#1953)

* Add OpenAPI parameter to DefaultCodegen#toDefaultValue(..)

* Remove CodegenConfig#fromOperation()

* Remove allDefinitions parameter from fromModel(..)

* Remove definitions parameter from CodegenConfig#fromOperation(..)

* remove schemas parameter from DefaultCodegen#fromRequestBody(..)

* remove schemas parameter from DefaultCodegen#fromCallback(..)

* Remove openAPI parameter from CodegenConfig#fromModel(..)

* Remove openAPI parameter from CodegenConfig#fromOperation(..)

* Remove openAPI parameter from DefaultCodegen#fromProperty(..)

* Remove openAPI parameter from DefaultCodegen#fromParameter(..)

* Remove OpenAPI parameter from several methods

* Use ModelUtils.getReferencedParameter(..)

* Remove unused variable

* Remove openAPI parameter from DefaultCodegen#fromResponse(..)

* Remove openAPI parameter from DefaultCodegen#addHeaders(..)

* Remove from addConsumesInfo(..)/addProducesInfo(..)

* Improve test: add property to prevent Pet from being a free-form object

* remove globalSchemas Map<String, Schema>

* remove deprecated method: postProcessOperations()

* Remove 'Map<String, Schema> allSchemas' from addProperties(..)

* Remove 'Map<String, Schema> allDefinitions' from createDiscriminator(..)

* Remove 'Map<String, Schema> allSchemas' from unaliasPropertySchema(..)

* Rename globalOpenAPI to openAPI

* Update documentation

* Run “Optimize import” in IntelliJ IDEA

Author: jmini

docs/migration-guide.adoc

@@ -22,6 +22,24 @@ The option is replaced with `-g` (`--generator-name`).
 * `-g` allows the same values as `-l`
 * See `list` command for the list of generator name
 
+==== Access OpenAPI instance as member and not as parameter
+
+If you are creating or extending a generator (programmatically), you might have use one of the following parameters: `OpenAPI openAPI` or `Map<String, Schema> allDefinitions` or `Map<String, Schema> allSchemas`. Example methods:
+
+* `CodegenConfig#fromOperation(String, String, Operation, Map<String, Schema>, OpenAPI)`
+* `CodegenConfig#fromModel(String, Schema, Map<String, Schema>)`
+* `DefaultCodegen#fromResponse(OpenAPI, String, ApiResponse)`
+* `DefaultCodegen#DefaultCodegen.fromRequestBody(RequestBody, Map<String, Schema>, Set<String>, String)`
+* `DefaultCodegen#createDiscriminator(String, Schema, Map<String, Schema>)`
+* ...
+
+The parameters (`openAPI`, `allDefinitions`, `allSchemas` ...) are now removed from the methods.
+
+To access the current OpenAPI instance, if you are extending `DefaultCodegen` you can use the protected `openAPI` member.
+
+If you are creating your own generator by implementing `CodegenConfig`, then the setter `CodegenConfig.setOpenAPI(OpenAPI)` will be called.
+You can keep a reference on the `OpenAPI` instance.
+
 === From 3.1.x to 3.2.0
 
 Version `3.2.0` is a minor version of OpenAPI-Generator, in comparison to `3.1.x` it contains some breaking changes, but with the possibility to fallback to the old behavior.

modules/openapi-generator/src/main/java/config/ConfigParser.java

@@ -19,14 +19,13 @@
 
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.File;
 import java.util.Iterator;
 import java.util.Map;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 public class ConfigParser {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(ConfigParser.class);

modules/openapi-generator/src/main/java/org/openapitools/codegen/AbstractGenerator.java

@@ -17,24 +17,15 @@
 
 package org.openapitools.codegen;
 
-import java.io.BufferedWriter;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.OutputStreamWriter;
-import java.io.Reader;
-import java.io.Writer;
-import java.nio.file.Paths;
-import java.util.Scanner;
-import java.util.regex.Pattern;
-
 import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.io.*;
+import java.nio.file.Paths;
+import java.util.Scanner;
+import java.util.regex.Pattern;
+
 public abstract class AbstractGenerator {
     private static final Logger LOGGER = LoggerFactory.getLogger(AbstractGenerator.class);
 

modules/openapi-generator/src/main/java/org/openapitools/codegen/CliOption.java

@@ -18,7 +18,6 @@
 package org.openapitools.codegen;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
-
 import io.swagger.v3.parser.util.SchemaTypeUtil;
 
 import java.util.LinkedHashMap;

modules/openapi-generator/src/main/java/org/openapitools/codegen/ClientOptInput.java

@@ -19,9 +19,10 @@
 
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.parser.core.models.AuthorizationValue;
-import java.util.List;
 import org.openapitools.codegen.auth.AuthParser;
 
+import java.util.List;
+
 public class ClientOptInput {
     private CodegenConfig config;
     private ClientOpts opts;

modules/openapi-generator/src/main/java/org/openapitools/codegen/ClientOpts.java

@@ -17,11 +17,11 @@
 
 package org.openapitools.codegen;
 
+import org.openapitools.codegen.auth.AuthMethod;
+
 import java.util.HashMap;
 import java.util.Map;
 
-import org.openapitools.codegen.auth.AuthMethod;
-
 public class ClientOpts {
     protected String uri;
     protected String target;

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenConfig.java

@@ -18,7 +18,6 @@
 package org.openapitools.codegen;
 
 import com.samskivert.mustache.Mustache.Compiler;
-
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.media.Schema;
@@ -27,7 +26,6 @@
 import io.swagger.v3.oas.models.servers.ServerVariable;
 
 import java.io.File;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -111,11 +109,9 @@ public interface CodegenConfig {
 
     void setOutputDir(String dir);
 
-    CodegenModel fromModel(String name, Schema schema, Map<String, Schema> allDefinitions);
-
-    CodegenOperation fromOperation(String resourcePath, String httpMethod, Operation operation, Map<String, Schema> definitions, OpenAPI openAPI);
+    CodegenModel fromModel(String name, Schema schema);
 
-    CodegenOperation fromOperation(String resourcePath, String httpMethod, Operation operation, Map<String, Schema> definitions);
+    CodegenOperation fromOperation(String resourcePath, String httpMethod, Operation operation);
 
     List<CodegenSecurity> fromSecurity(Map<String, SecurityScheme> schemas);
 
@@ -179,14 +175,6 @@ public interface CodegenConfig {
 
     Map<String, Object> postProcessModels(Map<String, Object> objs);
 
-    /**
-     * @deprecated use {@link #postProcessOperationsWithModels(Map, List)} instead. This method will be removed
-     * @param objs the objects map that will be passed to the templating engine
-     * @return the the objects map instance.
-     */
-    @Deprecated
-    Map<String, Object> postProcessOperations(Map<String, Object> objs);
-
     Map<String, Object> postProcessOperationsWithModels(Map<String, Object> objs, List<Object> allModels);
 
     Map<String, Object> postProcessSupportingFileData(Map<String, Object> objs);
@@ -266,9 +254,10 @@ public interface CodegenConfig {
 
     void setEnablePostProcessFile(boolean isEnablePostProcessFile);
 
-    // set OpenAPI and schemas
-    void setGlobalOpenAPI(OpenAPI openAPI);
-
-    void setGlobalSchemas(OpenAPI openAPI);
+    /**
+     * Set the OpenAPI instance. This method needs to be called right after the instantiation of the Codegen class.
+     * @param openAPI specification being generated
+     */
+    void setOpenAPI(OpenAPI openAPI);
 
 }

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenConfigLoader.java

@@ -17,12 +17,12 @@
 
 package org.openapitools.codegen;
 
-import static java.util.ServiceLoader.load;
-
 import java.util.ArrayList;
 import java.util.List;
 import java.util.ServiceLoader;
 
+import static java.util.ServiceLoader.load;
+
 public class CodegenConfigLoader {
     /**
      * Tries to load config class with SPI first, then with class name directly from classpath

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenDiscriminator.java

@@ -2,7 +2,10 @@
 
 import org.apache.commons.lang3.builder.ToStringBuilder;
 
-import java.util.*;
+import java.util.LinkedHashSet;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
 
 public class CodegenDiscriminator {
     private String propertyName;

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenModel.java

@@ -17,13 +17,12 @@
 
 package org.openapitools.codegen;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import io.swagger.v3.oas.models.ExternalDocumentation;
+import org.apache.commons.lang3.builder.ToStringBuilder;
 
 import java.util.*;
 
-import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
-import org.apache.commons.lang3.builder.ToStringBuilder;
-
 @JsonIgnoreProperties({"parentModel", "interfaceModels"})
 public class CodegenModel {
     public String parent, parentSchema;

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenOperation.java

@@ -20,14 +20,7 @@
 import io.swagger.v3.oas.models.ExternalDocumentation;
 import io.swagger.v3.oas.models.tags.Tag;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.Set;
+import java.util.*;
 
 public class CodegenOperation {
     public final List<CodegenProperty> responseHeaders = new ArrayList<CodegenProperty>();

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenSecurity.java

@@ -17,8 +17,6 @@
 
 package org.openapitools.codegen;
 
-import io.swagger.v3.oas.models.security.Scopes;
-
 import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;