rename ProductState to State

src/model/Product.java

 package model;
 
 import com.google.gson.annotations.SerializedName;
-import models.ProductState;
+import models.State;
 import models.StockState;
 
 public class Product {
@@ -10,7 +10,7 @@ public class Product {
     private double price;
     @SerializedName("init_price")
     private double initPrice;
-    private ProductState state;
+    private State state;
     @SerializedName("honorary_code")
     private String honoraryCode;
 
@@ -56,11 +56,11 @@ public class Product {
         this.price = price;
     }
 
-    public ProductState getState() {
+    public State getState() {
         return state;
     }
 
-    public void setState(ProductState state) {
+    public void setState(State state) {
         this.state = state;
     }
 

src/models/SaleState.java

@@ -3,7 +3,7 @@ package models;
 import services.CodeGenerator;
 import model.Product;
 
-public class SaleState extends ProductState {
+public class SaleState extends State {
     public SaleState() {
         super("for_sale");
     }

src/models/SoldState.java

@@ -2,7 +2,7 @@ package models;
 
 import model.Product;
 
-public class SoldState extends ProductState{
+public class SoldState extends State {
 
     public SoldState() {
         super("sold");

src/models/ProductState.java → src/models/State.java

@@ -2,10 +2,10 @@ package models;
 
 import model.Product;
 
-public abstract class ProductState {
+public abstract class State {
     private final String title;
 
-    protected ProductState(String title) {
+    protected State(String title) {
         this.title = title;
     }
 

src/models/StockState.java

@@ -2,7 +2,7 @@ package models;
 
 import model.Product;
 
-public class StockState extends ProductState{
+public class StockState extends State {
     public StockState() {
         super("in_stock");
     }

src/repositories/ProductRepository.java

@@ -6,7 +6,7 @@ import application.utils.FileReader;
 import application.utils.FileWriter;
 import model.Product;
 import models.ProductCollection;
-import models.ProductState;
+import models.State;
 
 import java.io.IOException;
 import java.nio.file.Files;
@@ -15,8 +15,8 @@ import java.nio.file.Paths;
 
 public class ProductRepository {
     private final Gson gson = new GsonBuilder()
-            .registerTypeAdapter(ProductState.class, new ProductStateDeserialize())
-            .registerTypeAdapter(ProductState.class, new ProductStateSerialize())
+            .registerTypeAdapter(State.class, new ProductStateDeserialize())
+            .registerTypeAdapter(State.class, new ProductStateSerialize())
             .setPrettyPrinting()
             .create();
 

src/repositories/ProductStateDeserialize.java

@@ -5,14 +5,14 @@ import com.google.gson.JsonDeserializer;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonParseException;
 import models.SaleState;
-import models.ProductState;
+import models.State;
 import models.SoldState;
 import models.StockState;
 
 import java.lang.reflect.Type;
 
-public class ProductStateDeserialize implements JsonDeserializer<ProductState> {
-    public ProductState deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
+public class ProductStateDeserialize implements JsonDeserializer<State> {
+    public State deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
             throws JsonParseException {
         String type = json.getAsString();
         switch (type){

src/repositories/ProductStateSerialize.java

@@ -4,12 +4,12 @@ import com.google.gson.JsonElement;
 import com.google.gson.JsonPrimitive;
 import com.google.gson.JsonSerializationContext;
 import com.google.gson.JsonSerializer;
-import models.ProductState;
+import models.State;
 
 import java.lang.reflect.Type;
 
-public class ProductStateSerialize implements JsonSerializer<ProductState> {
-    public JsonElement serialize(ProductState src, Type typeOfSrc, JsonSerializationContext context) {
+public class ProductStateSerialize implements JsonSerializer<State> {
+    public JsonElement serialize(State src, Type typeOfSrc, JsonSerializationContext context) {
         return new JsonPrimitive(src.getTitle());
     }
 }