victools · CarstenWickner · Mar 2, 2020 · Mar 1, 2020 · Mar 1, 2020 · Mar 2, 2020
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,13 +5,18 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Enable declaration of subtypes through `withSubtypeResolver(SubtypeResolver)` on `forTypesInGeneral()` (#24)
+
+### Changed
+- Move custom definitions and type attribute overrides into `forTypesInGeneral()` (while preserving delegate setters on config builder)
 
 ## [4.3.0] - 2020-02-28
 ### Changed
-- limit collected type attributes by declared "type" (prior to any `TypeAttributeOverride`!)
+- Limit collected type attributes by declared "type" (prior to any `TypeAttributeOverride`!)
 
 ### Fixed
-- not declare any "type" for `Object.class` by default
+- Not declare any "type" for `Object.class` by default
 
 ## [4.2.0] - 2020-02-27
 ### Added
@@ -25,15 +30,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [4.1.0] - 2020-02-18
 ### Added
-- new `Option.FLATTENED_ENUMS_FROM_TOSTRING`, using `toString()` instead of `name()` as per `Option.FLATTENED_ENUMS`
+- New `Option.FLATTENED_ENUMS_FROM_TOSTRING`, using `toString()` instead of `name()` as per `Option.FLATTENED_ENUMS`
 
 ## [4.0.2] - 2020-01-30
 ### Fixed
-- avoid further characters in definition keys that are not URI-compatible (#19)
+- Avoid further characters in definition keys that are not URI-compatible (#19)
 
 ## [4.0.1] - 2020-01-29
 ### Fixed
-- avoid white-spaces in definition keys
+- Avoid white-spaces in definition keys
 
 ## [4.0.0] - 2020-01-03
 ### Added

diff --git a/README.md b/README.md
@@ -151,29 +151,30 @@ configBuilder.forTypesInGeneral()
 |    1 | `$schema` | Fixed to "http://json-schema.org/draft-07/schema#" – can be toggled on/off via `Option.SCHEMA_VERSION_INDICATOR`. |
 |    2 | `definitions` | Filled with sub-schemas to support circular references – via `Option.DEFINITIONS_FOR_ALL_OBJECTS` it can be configured whether only sub-schemas appearing more than once are included or all. |
 |    3 | `$ref` | Used with relative references to sub-schemas in `definitions`. |
-|    4 | `type` | Differentiating between `boolean`/`string`/`integer`/`number` for primitive/known types. `null` is added if a property is deemed nullable according to configuration (`SchemaGeneratorConfigPart.withNullableCheck()`). Arrays and sub-types of `Collection<?>` are treated as `array`, everything else as `object`. A declared type may be interpreted as another type according to configuration (`SchemaGeneratorConfigPart.withTargetTypeOverrideResolver()`). |
+|    4 | `type` | Differentiating between `boolean`/`string`/`integer`/`number` for primitive/known types. `null` is added if a property is deemed nullable according to configuration (`SchemaGeneratorConfigPart.withNullableCheck()`). Arrays and subtypes of `Collection<?>` are treated as `array`, everything else as `object`. A declared type may be interpreted as another type according to configuration (`SchemaGeneratorConfigPart.withTargetTypeOverrideResolver()`). |
 |    5 | `properties` | Listing all detected fields and/or methods in an `object`. Which ones are being included can be steered by various `Option`s or via one of the provided `OptionPreset`s as well as by ignoring individual ones via configuration (`SchemaGeneratorConfigPart.withIgnoreCheck()`). Names can be altered via configuration (`SchemaGeneratorConfigPart.withPropertyNameOverrideResolver()`). |
 |    6 | `items` | Indicating the type of `array`/`Collection` elements. |
 |    7 | `required` | Listing the names of fields/methods that are deemed mandatory according to configuration (`SchemaGeneratorConfigPart.withRequiredCheck()`). |
 |    8 | `allOf` | Used to combine general attributes derived from the type itself with attributes collected in the respective context of the associated field/method. |
-|    9 | `oneOf` | Used to indicate when a particular field/method can be of `type` `null`. |
-|   10 | `title` | Collected value according to configuration (`SchemaGeneratorConfigPart.withTitleResolver()`). |
-|   11 | `description` | Collected value according to configuration (`SchemaGeneratorConfigPart.withDescriptionResolver()`). |
-|   12 | `const` | Collected value according to configuration (`SchemaGeneratorConfigPart.withEnumResolver()`) if only a single value was found. |
-|   13 | `enum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withEnumResolver()`) if multiple values were found. |
-|   14 | `default` | Collected value according to configuration (`SchemaGeneratorConfigPart.withDefaultResolver()`). |
-|   15 | `additionalProperties` | Collected value according to configuration (`SchemaGeneratorConfigPart.withAdditionalPropertiesResolver()`). |
-|   16 | `patternProperties` | Collected value(s) according to configuration (`SchemaGeneratorConfigPart.withPatternPropertiesResolver()`). |
-|   17 | `minLength` | Collected value according to configuration (`SchemaGeneratorConfigPart.withStringMinLengthResolver()`). |
-|   18 | `maxLength` | Collected value according to configuration (`SchemaGeneratorConfigPart.withStringMaxLengthResolver()`). |
-|   19 | `format` | Collected value according to configuration (`SchemaGeneratorConfigPart.withStringFormatResolver()`). |
-|   20 | `pattern` | Collected value according to configuration (`SchemaGeneratorConfigPart.withStringPatternResolver()`). |
-|   21 | `minimum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberInclusiveMinimumResolver()`). |
-|   22 | `exclusiveMinimum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberExclusiveMinimumResolver()`). |
-|   23 | `maximum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberInclusiveMaximumResolver()`). |
-|   24 | `exclusiveMaximum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberExclusiveMaximumResolver()`). |
-|   25 | `multipleOf` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberMultipleOfResolver()`). |
-|   26 | `minItems` | Collected value according to configuration (`SchemaGeneratorConfigPart.withArrayMinItemsResolver()`). |
-|   27 | `maxItems` | Collected value according to configuration (`SchemaGeneratorConfigPart.withArrayMaxItemsResolver()`). |
-|   28 | `uniqueItems` | Collected value according to configuration (`SchemaGeneratorConfigPart.withArrayUniqueItemsResolver()`). |
-|   29 | any other | You can directly manipulate the generated `ObjectNode` of a sub-schema – e.g. setting additional attributes – via configuration based on a given type in general (`SchemaGeneratorConfigBuilder.with(TypeAttributeOverride)`) and/or in the context of a particular field/method (`SchemaGeneratorConfigPart.withInstanceAttributeOverride()`). |
+|    9 | `anyOf` | Used to list alternatives according to configuration (`SchemaGeneratorGeneralConfigPart.withSubtypeResolver()`). |
+|   10 | `oneOf` | Used to indicate when a particular field/method can be of `type` `null`. |
+|   11 | `title` | Collected value according to configuration (`SchemaGeneratorConfigPart.withTitleResolver()`). |
+|   12 | `description` | Collected value according to configuration (`SchemaGeneratorConfigPart.withDescriptionResolver()`). |
+|   13 | `const` | Collected value according to configuration (`SchemaGeneratorConfigPart.withEnumResolver()`) if only a single value was found. |
+|   14 | `enum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withEnumResolver()`) if multiple values were found. |
+|   15 | `default` | Collected value according to configuration (`SchemaGeneratorConfigPart.withDefaultResolver()`). |
+|   16 | `additionalProperties` | Collected value according to configuration (`SchemaGeneratorConfigPart.withAdditionalPropertiesResolver()`). |
+|   17 | `patternProperties` | Collected value(s) according to configuration (`SchemaGeneratorConfigPart.withPatternPropertiesResolver()`). |
+|   18 | `minLength` | Collected value according to configuration (`SchemaGeneratorConfigPart.withStringMinLengthResolver()`). |
+|   19 | `maxLength` | Collected value according to configuration (`SchemaGeneratorConfigPart.withStringMaxLengthResolver()`). |
+|   20 | `format` | Collected value according to configuration (`SchemaGeneratorConfigPart.withStringFormatResolver()`). |
+|   21 | `pattern` | Collected value according to configuration (`SchemaGeneratorConfigPart.withStringPatternResolver()`). |
+|   22 | `minimum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberInclusiveMinimumResolver()`). |
+|   23 | `exclusiveMinimum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberExclusiveMinimumResolver()`). |
+|   24 | `maximum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberInclusiveMaximumResolver()`). |
+|   25 | `exclusiveMaximum` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberExclusiveMaximumResolver()`). |
+|   26 | `multipleOf` | Collected value according to configuration (`SchemaGeneratorConfigPart.withNumberMultipleOfResolver()`). |
+|   27 | `minItems` | Collected value according to configuration (`SchemaGeneratorConfigPart.withArrayMinItemsResolver()`). |
+|   28 | `maxItems` | Collected value according to configuration (`SchemaGeneratorConfigPart.withArrayMaxItemsResolver()`). |
+|   29 | `uniqueItems` | Collected value according to configuration (`SchemaGeneratorConfigPart.withArrayUniqueItemsResolver()`). |
+|   30 | any other | You can directly manipulate the generated `ObjectNode` of a sub-schema – e.g. setting additional attributes – via configuration based on a given type in general (`SchemaGeneratorConfigBuilder.with(TypeAttributeOverride)`) and/or in the context of a particular field/method (`SchemaGeneratorConfigPart.withInstanceAttributeOverride()`). |
diff --git a/pom.xml b/pom.xml
@@ -8,7 +8,7 @@
 
     <groupId>com.github.victools</groupId>
     <artifactId>jsonschema-generator</artifactId>
-    <version>4.3.1-SNAPSHOT</version>
+    <version>4.4.0-SNAPSHOT</version>
     <packaging>jar</packaging>
 
     <licenses>

diff --git a/src/main/java/com/github/victools/jsonschema/generator/SchemaGenerationContext.java b/src/main/java/com/github/victools/jsonschema/generator/SchemaGenerationContext.java
@@ -24,6 +24,13 @@
  */
 public interface SchemaGenerationContext {
 
+    /**
+     * Getter for the applicable configuration.
+     *
+     * @return configuration defined for this context
+     */
+    SchemaGeneratorConfig getGeneratorConfig();
+
     /**
      * Getter for the type resolution/introspection context in use.
      *

diff --git a/src/main/java/com/github/victools/jsonschema/generator/SchemaGeneratorConfig.java b/src/main/java/com/github/victools/jsonschema/generator/SchemaGeneratorConfig.java
@@ -95,6 +95,15 @@ public interface SchemaGeneratorConfig {
     CustomDefinition getCustomDefinition(ResolvedType javaType, SchemaGenerationContext context,
             CustomDefinitionProviderV2 ignoredDefinitionProvider);
 
+    /**
+     * Look-up a declared type's subtypes in order to list those specifically (in an "{@value SchemaConstants#TAG_ANYOF}").
+     *
+     * @param javaType declared type to look-up subtypes for
+     * @param context generation context (including a reference to the {@code TypeContext} for deriving a {@link ResolvedType} from a {@link Class})
+     * @return subtypes to list as possible alternatives for the declared type (may be empty)
+     */
+    List<ResolvedType> resolveSubtypes(ResolvedType javaType, SchemaGenerationContext context);
+
     /**
      * Getter for the applicable type attribute overrides.
      *

diff --git a/src/main/java/com/github/victools/jsonschema/generator/SchemaGeneratorConfigBuilder.java b/src/main/java/com/github/victools/jsonschema/generator/SchemaGeneratorConfigBuilder.java
@@ -18,11 +18,9 @@
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.github.victools.jsonschema.generator.impl.SchemaGeneratorConfigImpl;
-import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
@@ -37,11 +35,9 @@ public class SchemaGeneratorConfigBuilder {
     private final OptionPreset preset;
 
     private final Map<Option, Boolean> options = new HashMap<>();
-    private final SchemaGeneratorTypeConfigPart<TypeScope> typesInGeneralConfigPart = new SchemaGeneratorTypeConfigPart<>();
+    private final SchemaGeneratorGeneralConfigPart typesInGeneralConfigPart = new SchemaGeneratorGeneralConfigPart();
     private final SchemaGeneratorConfigPart<FieldScope> fieldConfigPart = new SchemaGeneratorConfigPart<>();
     private final SchemaGeneratorConfigPart<MethodScope> methodConfigPart = new SchemaGeneratorConfigPart<>();
-    private final List<CustomDefinitionProviderV2> customDefinitions = new ArrayList<>();
-    private final List<TypeAttributeOverride> typeAttributeOverrides = new ArrayList<>();
 
     /**
      * Constructor of an empty configuration builder. This is equivalent to calling:<br>
@@ -91,17 +87,15 @@ public SchemaGeneratorConfig build() {
                 enabledOptions,
                 this.typesInGeneralConfigPart,
                 this.fieldConfigPart,
-                this.methodConfigPart,
-                this.customDefinitions,
-                this.typeAttributeOverrides);
+                this.methodConfigPart);
     }
 
     /**
      * Get the part of this configuration builder dedicated to custom attribute look-ups for types in general, independent of the declaration context.
      *
      * @return configuration part responsible for handling types regardless of their declaration context
      */
-    public SchemaGeneratorTypeConfigPart<TypeScope> forTypesInGeneral() {
+    public SchemaGeneratorGeneralConfigPart forTypesInGeneral() {
         return this.typesInGeneralConfigPart;
     }
 
@@ -166,7 +160,7 @@ public SchemaGeneratorConfigBuilder with(Module module) {
      * @return this builder instance (for chaining)
      */
     public SchemaGeneratorConfigBuilder with(CustomDefinitionProviderV2 definitionProvider) {
-        this.customDefinitions.add(definitionProvider);
+        this.typesInGeneralConfigPart.withCustomDefinitionProvider(definitionProvider);
         return this;
     }
 
@@ -177,7 +171,7 @@ public SchemaGeneratorConfigBuilder with(CustomDefinitionProviderV2 definitionPr
      * @return this builder instance (for chaining)
      */
     public SchemaGeneratorConfigBuilder with(TypeAttributeOverride override) {
-        this.typeAttributeOverrides.add(override);
+        this.typesInGeneralConfigPart.withTypeAttributeOverride(override);
         return this;
     }
 

diff --git a/src/main/java/com/github/victools/jsonschema/generator/SchemaGeneratorConfigPart.java b/src/main/java/com/github/victools/jsonschema/generator/SchemaGeneratorConfigPart.java
@@ -141,9 +141,13 @@ public Boolean isNullable(M member) {
 
     /**
      * Setter for target type resolver, expecting the respective member and the default type as inputs.
+     * <br>
+     * For generally replacing one type with one or multiple of its subtypes, you may want to consider adding a {@link SubtypeResolver} via
+     * {@link SchemaGeneratorConfigBuilder#forTypesInGeneral() forTypesInGeneral()} instead.
      *
      * @param resolver how to determine the alternative target type
      * @return this config part (for chaining)
+     * @see SchemaGeneratorGeneralConfigPart#withSubtypeResolver(SubtypeResolver)
      */
     public SchemaGeneratorConfigPart<M> withTargetTypeOverrideResolver(ConfigFunction<M, ResolvedType> resolver) {
         this.targetTypeOverrideResolvers.add(resolver);