Add "equals" and "hashCode" methods to Java clients

Added for the default, "jersey2" and "okhttp-gson" clients

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Category.java

@@ -5,6 +5,7 @@ import io.swagger.client.StringUtil;
 import com.google.gson.annotations.SerializedName;
 
 
+import java.util.Objects;
 
 import io.swagger.annotations.*;
 
@@ -44,6 +45,20 @@ public class Category   {
 
   
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    Category category = (Category) o;
+    return Objects.equals(id, category.id) &&
+        Objects.equals(name, category.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
+
   @Override
   public String toString()  {
     StringBuilder sb = new StringBuilder();

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Order.java

@@ -6,6 +6,7 @@ import java.util.Date;
 import com.google.gson.annotations.SerializedName;
 
 
+import java.util.Objects;
 
 import io.swagger.annotations.*;
 
@@ -125,6 +126,24 @@ public enum StatusEnum {
 
   
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    Order order = (Order) o;
+    return Objects.equals(id, order.id) &&
+        Objects.equals(petId, order.petId) &&
+        Objects.equals(quantity, order.quantity) &&
+        Objects.equals(shipDate, order.shipDate) &&
+        Objects.equals(status, order.status) &&
+        Objects.equals(complete, order.complete);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, petId, quantity, shipDate, status, complete);
+  }
+
   @Override
   public String toString()  {
     StringBuilder sb = new StringBuilder();

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Pet.java

@@ -2,12 +2,13 @@ package io.swagger.client.model;
 
 import io.swagger.client.StringUtil;
 import io.swagger.client.model.Category;
-import io.swagger.client.model.Tag;
 import java.util.*;
+import io.swagger.client.model.Tag;
 
 import com.google.gson.annotations.SerializedName;
 
 
+import java.util.Objects;
 
 import io.swagger.annotations.*;
 
@@ -127,6 +128,24 @@ public enum StatusEnum {
 
   
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    Pet pet = (Pet) o;
+    return Objects.equals(id, pet.id) &&
+        Objects.equals(category, pet.category) &&
+        Objects.equals(name, pet.name) &&
+        Objects.equals(photoUrls, pet.photoUrls) &&
+        Objects.equals(tags, pet.tags) &&
+        Objects.equals(status, pet.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, category, name, photoUrls, tags, status);
+  }
+
   @Override
   public String toString()  {
     StringBuilder sb = new StringBuilder();

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Tag.java

@@ -5,6 +5,7 @@ import io.swagger.client.StringUtil;
 import com.google.gson.annotations.SerializedName;
 
 
+import java.util.Objects;
 
 import io.swagger.annotations.*;
 
@@ -44,6 +45,20 @@ public class Tag   {
 
   
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    Tag tag = (Tag) o;
+    return Objects.equals(id, tag.id) &&
+        Objects.equals(name, tag.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
+
   @Override
   public String toString()  {
     StringBuilder sb = new StringBuilder();

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/User.java

@@ -5,6 +5,7 @@ import io.swagger.client.StringUtil;
 import com.google.gson.annotations.SerializedName;
 
 
+import java.util.Objects;
 
 import io.swagger.annotations.*;
 
@@ -129,6 +130,26 @@ public class User   {
 
   
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) return true;
+    if (o == null || getClass() != o.getClass()) return false;
+    User user = (User) o;
+    return Objects.equals(id, user.id) &&
+        Objects.equals(username, user.username) &&
+        Objects.equals(firstName, user.firstName) &&
+        Objects.equals(lastName, user.lastName) &&
+        Objects.equals(email, user.email) &&
+        Objects.equals(password, user.password) &&
+        Objects.equals(phone, user.phone) &&
+        Objects.equals(userStatus, user.userStatus);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, username, firstName, lastName, email, password, phone, userStatus);
+  }
+
   @Override
   public String toString()  {
     StringBuilder sb = new StringBuilder();

samples/client/petstore/java/okhttp-gson/src/test/java/io/swagger/petstore/test/PetApiTest.java

@@ -272,6 +272,27 @@ public class PetApiTest {
         api.uploadFile(pet.getId(), "a test file", new File(file.getAbsolutePath()));
     }
 
+    @Test
+    public void testEqualsAndHashCode() {
+        Pet pet1 = new Pet();
+        Pet pet2 = new Pet();
+        assertTrue(pet1.equals(pet2));
+        assertTrue(pet1.equals(pet2));
+        assertTrue(pet1.hashCode() == pet1.hashCode());
+
+        pet2.setName("really-happy");
+        pet2.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
+        assertFalse(pet1.equals(pet2));
+        assertFalse(pet1.equals(pet2));
+        assertFalse(pet1.hashCode() == (pet2.hashCode()));
+
+        pet1.setName("really-happy");
+        pet1.setPhotoUrls(Arrays.asList(new String[]{"http://foo.bar.com/1", "http://foo.bar.com/2"}));
+        assertTrue(pet1.equals(pet2));
+        assertTrue(pet1.equals(pet2));
+        assertTrue(pet1.hashCode() == pet1.hashCode());
+    }
+
     private Pet createRandomPet() {
         Pet pet = new Pet();
         pet.setId(System.currentTimeMillis());