feat(schema): Add primitive Schema records

Author: thced

src/main/java/com/retailsvc/http/spec/schema/IntegerSchema.java

@@ -0,0 +1,13 @@
+package com.retailsvc.http.spec.schema;
+
+import java.util.Set;
+
+public record IntegerSchema(
+    Set<TypeName> types,
+    Long minimum,
+    Long maximum,
+    Long exclusiveMinimum,
+    Long exclusiveMaximum,
+    Long multipleOf,
+    String format)
+    implements Schema {}

src/main/java/com/retailsvc/http/spec/schema/NullSchema.java

@@ -0,0 +1,10 @@
+package com.retailsvc.http.spec.schema;
+
+import java.util.Set;
+
+public record NullSchema() implements Schema {
+  @Override
+  public Set<TypeName> types() {
+    return Set.of(TypeName.NULL);
+  }
+}

src/main/java/com/retailsvc/http/spec/schema/NumberSchema.java

@@ -0,0 +1,13 @@
+package com.retailsvc.http.spec.schema;
+
+import java.util.Set;
+
+public record NumberSchema(
+    Set<TypeName> types,
+    Number minimum,
+    Number maximum,
+    Number exclusiveMinimum,
+    Number exclusiveMaximum,
+    Number multipleOf,
+    String format)
+    implements Schema {}

src/main/java/com/retailsvc/http/spec/schema/RefSchema.java

@@ -0,0 +1,10 @@
+package com.retailsvc.http.spec.schema;
+
+import java.util.Set;
+
+public record RefSchema(String pointer) implements Schema {
+  @Override
+  public Set<TypeName> types() {
+    return Set.of();
+  }
+}

src/main/java/com/retailsvc/http/spec/schema/Schema.java

@@ -2,6 +2,7 @@
 
 import java.util.Set;
 
-public sealed interface Schema permits BooleanSchema {
+public sealed interface Schema
+    permits StringSchema, NumberSchema, IntegerSchema, BooleanSchema, NullSchema, RefSchema {
   Set<TypeName> types();
 }

src/main/java/com/retailsvc/http/spec/schema/StringSchema.java

@@ -0,0 +1,13 @@
+package com.retailsvc.http.spec.schema;
+
+import java.util.List;
+import java.util.Set;
+
+public record StringSchema(
+    Set<TypeName> types,
+    String pattern,
+    Integer minLength,
+    Integer maxLength,
+    String format,
+    List<String> enumValues)
+    implements Schema {}

src/test/java/com/retailsvc/http/spec/schema/PrimitiveSchemasTest.java

@@ -0,0 +1,49 @@
+package com.retailsvc.http.spec.schema;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.List;
+import java.util.Set;
+import org.junit.jupiter.api.Test;
+
+class PrimitiveSchemasTest {
+  @Test
+  void stringSchemaCarriesAllStringFields() {
+    StringSchema s =
+        new StringSchema(Set.of(TypeName.STRING), "^x.*$", 1, 64, "uuid", List.of("a", "b"));
+    assertThat(s.pattern()).isEqualTo("^x.*$");
+    assertThat(s.minLength()).isEqualTo(1);
+    assertThat(s.maxLength()).isEqualTo(64);
+    assertThat(s.format()).isEqualTo("uuid");
+    assertThat(s.enumValues()).containsExactly("a", "b");
+  }
+
+  @Test
+  void numberSchemaCarriesAllNumericConstraints() {
+    NumberSchema n = new NumberSchema(Set.of(TypeName.NUMBER), 0, 100, null, 100, 5, "double");
+    assertThat(n.minimum()).isEqualTo(0);
+    assertThat(n.maximum()).isEqualTo(100);
+    assertThat(n.exclusiveMaximum()).isEqualTo(100);
+    assertThat(n.multipleOf()).isEqualTo(5);
+  }
+
+  @Test
+  void integerSchemaUsesLongConstraints() {
+    IntegerSchema i =
+        new IntegerSchema(Set.of(TypeName.INTEGER), 1L, 2_000_000_000L, null, null, null, "int64");
+    assertThat(i.maximum()).isEqualTo(2_000_000_000L);
+    assertThat(i.format()).isEqualTo("int64");
+  }
+
+  @Test
+  void nullSchemaTypesIsAlwaysNull() {
+    assertThat(new NullSchema().types()).containsExactly(TypeName.NULL);
+  }
+
+  @Test
+  void refSchemaTypesIsEmpty() {
+    RefSchema r = new RefSchema("#/components/schemas/User");
+    assertThat(r.pointer()).isEqualTo("#/components/schemas/User");
+    assertThat(r.types()).isEmpty();
+  }
+}