object schema property order

FasterXML#27

src/main/java/com/fasterxml/jackson/module/jsonSchema/types/ObjectSchema.java

@@ -1,7 +1,6 @@
 package com.fasterxml.jackson.module.jsonSchema.types;
 
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -12,6 +11,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatTypes;
 import com.fasterxml.jackson.module.jsonSchema.JsonSchema;
+import java.util.LinkedHashMap;
 
 /**
  * This type represents a {@link JsonSchema} as an object type
@@ -68,8 +68,8 @@ public class ObjectSchema extends ContainerTypeSchema
 	public ObjectSchema()
 	{
 		dependencies = new ArrayList<Dependency>();
-		patternProperties = new HashMap<String, JsonSchema>();
-		properties = new HashMap<String, JsonSchema>();
+		patternProperties = new LinkedHashMap<String, JsonSchema>();
+		properties = new LinkedHashMap<String, JsonSchema>();
 	}
 
 	public boolean addSchemaDependency(String depender, JsonSchema parentMustMatch) {

src/test/java/com/fasterxml/jackson/module/jsonSchema/TestPropertyOrderInSchema.java

@@ -0,0 +1,55 @@
+package com.fasterxml.jackson.module.jsonSchema;
+
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class TestPropertyOrderInSchema extends SchemaTestBase {
+
+    @JsonPropertyOrder({"a", "b", "c"})
+    static class Bean {
+
+        private int b;
+        private String c;
+        private String a;
+
+        public int getB() {
+            return b;
+        }
+
+        public void setB(int b) {
+            this.b = b;
+        }
+
+        public String getC() {
+            return c;
+        }
+
+        public void setC(String c) {
+            this.c = c;
+        }
+
+        public String getA() {
+            return a;
+        }
+
+        public void setA(String a) {
+            this.a = a;
+        }
+    }
+
+    /*
+     /**********************************************************
+     /* Unit tests
+     /**********************************************************
+     */
+    final ObjectMapper MAPPER = objectMapper();
+
+    public void testCorrectOrder() throws Exception {
+        JsonSchemaGenerator generator = new JsonSchemaGenerator(MAPPER);
+        JsonSchema jsonSchema = generator.generateSchema(Bean.class);
+        System.out.println(jsonSchema.asObjectSchema().getProperties().keySet());
+        assertEquals(jsonSchema.asObjectSchema().getProperties().keySet().toString(), "[a, b, c]");
+    }
+
+}