diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaInflectorServerCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaInflectorServerCodegen.java
index a7612638255d..01ca02f185d9 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaInflectorServerCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaInflectorServerCodegen.java
@@ -73,6 +73,8 @@ public class JavaInflectorServerCodegen extends JavaClientCodegen implements Cod
                         "src/main/swagger",
                         "swagger.yaml")
         );
+        supportingFiles.add(new SupportingFile("StringUtil.mustache",
+                (sourceFolder + '/' + invokerPackage).replace(".", "/"), "StringUtil.java"));
     }
 
     @Override
@@ -118,22 +120,6 @@ public class JavaInflectorServerCodegen extends JavaClientCodegen implements Cod
         co.baseName = basePath;
     }
 
-    @Override
-    public Map<String, Object> postProcessModels(Map<String, Object> objs) {
-        List<Object> models = (List<Object>) objs.get("models");
-        for (Object _mo : models) {
-            Map<String, Object> mo = (Map<String, Object>) _mo;
-            CodegenModel cm = (CodegenModel) mo.get("model");
-            for (CodegenProperty var : cm.vars) {
-                // handle default value for enum, e.g. available => StatusEnum.available
-                if (var.isEnum && var.defaultValue != null && !"null".equals(var.defaultValue)) {
-                    var.defaultValue = var.datatypeWithEnum + "." + var.defaultValue;
-                }
-            }
-        }
-        return objs;
-    }
-
     @Override
     public Map<String, Object> postProcessOperations(Map<String, Object> objs) {
         Map<String, Object> operations = (Map<String, Object>) objs.get("operations");
diff --git a/modules/swagger-codegen/src/main/resources/JavaInflector/StringUtil.mustache b/modules/swagger-codegen/src/main/resources/JavaInflector/StringUtil.mustache
new file mode 100644
index 000000000000..073966b0c217
--- /dev/null
+++ b/modules/swagger-codegen/src/main/resources/JavaInflector/StringUtil.mustache
@@ -0,0 +1,42 @@
+package {{invokerPackage}};
+
+{{>generatedAnnotation}}
+public class StringUtil {
+  /**
+   * Check if the given array contains the given value (with case-insensitive comparison).
+   *
+   * @param array The array
+   * @param value The value to search
+   * @return true if the array contains the value
+   */
+  public static boolean containsIgnoreCase(String[] array, String value) {
+    for (String str : array) {
+      if (value == null && str == null) return true;
+      if (value != null && value.equalsIgnoreCase(str)) return true;
+    }
+    return false;
+  }
+
+  /**
+   * Join an array of strings with the given separator.
+   * <p>
+   * Note: This might be replaced by utility method from commons-lang or guava someday
+   * if one of those libraries is added as dependency.
+   * </p>
+   *
+   * @param array     The array of strings
+   * @param separator The separator
+   * @return the resulting string
+   */
+  public static String join(String[] array, String separator) {
+    int len = array.length;
+    if (len == 0) return "";
+
+    StringBuilder out = new StringBuilder();
+    out.append(array[0]);
+    for (int i = 1; i < len; i++) {
+      out.append(separator).append(array[i]);
+    }
+    return out.toString();
+  }
+}
diff --git a/modules/swagger-codegen/src/main/resources/JavaInflector/enumClass.mustache b/modules/swagger-codegen/src/main/resources/JavaInflector/enumClass.mustache
new file mode 100644
index 000000000000..6010e26704f5
--- /dev/null
+++ b/modules/swagger-codegen/src/main/resources/JavaInflector/enumClass.mustache
@@ -0,0 +1,17 @@
+
+  public enum {{{datatypeWithEnum}}} {
+    {{#allowableValues}}{{#enumVars}}{{{name}}}("{{{value}}}"){{^-last}},
+    {{/-last}}{{#-last}};{{/-last}}{{/enumVars}}{{/allowableValues}}
+
+    private String value;
+
+    {{{datatypeWithEnum}}}(String value) {
+      this.value = value;
+    }
+
+    @Override
+    @JsonValue
+    public String toString() {
+      return value;
+    }
+  }
diff --git a/modules/swagger-codegen/src/main/resources/JavaInflector/enumOuterClass.mustache b/modules/swagger-codegen/src/main/resources/JavaInflector/enumOuterClass.mustache
new file mode 100644
index 000000000000..7aea7b92f22f
--- /dev/null
+++ b/modules/swagger-codegen/src/main/resources/JavaInflector/enumOuterClass.mustache
@@ -0,0 +1,3 @@
+public enum {{classname}} {
+    {{#allowableValues}}{{.}}{{^-last}}, {{/-last}}{{/allowableValues}}
+}
\ No newline at end of file
diff --git a/modules/swagger-codegen/src/main/resources/JavaInflector/model.mustache b/modules/swagger-codegen/src/main/resources/JavaInflector/model.mustache
index 39f0f0b6fa12..005d63991daf 100644
--- a/modules/swagger-codegen/src/main/resources/JavaInflector/model.mustache
+++ b/modules/swagger-codegen/src/main/resources/JavaInflector/model.mustache
@@ -3,50 +3,13 @@ package {{package}};
 {{#imports}}import {{import}};
 {{/imports}}
 
-import io.swagger.annotations.*;
-import com.fasterxml.jackson.annotation.JsonProperty;
+{{#serializableModel}}import java.io.Serializable;{{/serializableModel}}
 {{#models}}
-
 {{#model}}{{#description}}
 /**
  * {{description}}
  **/{{/description}}
-@ApiModel(description = "{{{description}}}")
-{{>generatedAnnotation}}
-public class {{classname}} {{#parent}}extends {{{parent}}}{{/parent}} {
-  {{#vars}}{{#isEnum}}
-  public enum {{datatypeWithEnum}} {
-    {{#allowableValues}}{{#values}} {{.}}, {{/values}}{{/allowableValues}}
-  };
-  private {{{datatypeWithEnum}}} {{name}} = {{{defaultValue}}};{{/isEnum}}{{^isEnum}}
-  private {{{datatype}}} {{name}} = {{{defaultValue}}};{{/isEnum}}{{/vars}}
-
-  {{#vars}}
-  /**{{#description}}
-   * {{{description}}}{{/description}}{{#minimum}}
-   * minimum: {{minimum}}{{/minimum}}{{#maximum}}
-   * maximum: {{maximum}}{{/maximum}}
-   **/
-  @ApiModelProperty({{#required}}required = {{required}}, {{/required}}value = "{{{description}}}")
-  @JsonProperty("{{baseName}}")
-  public {{{datatypeWithEnum}}} {{getter}}() {
-    return {{name}};
-  }
-  public void {{setter}}({{{datatypeWithEnum}}} {{name}}) {
-    this.{{name}} = {{name}};
-  }
-
-  {{/vars}}
-
-  @Override
-  public String toString()  {
-    StringBuilder sb = new StringBuilder();
-    sb.append("class {{classname}} {\n");
-    {{#parent}}sb.append("  " + super.toString()).append("\n");{{/parent}}
-    {{#vars}}sb.append("  {{name}}: ").append({{name}}).append("\n");
-    {{/vars}}sb.append("}\n");
-    return sb.toString();
-  }
-}
+{{#isEnum}}{{>enumOuterClass}}{{/isEnum}}
+{{^isEnum}}{{>pojo}}{{/isEnum}}
 {{/model}}
 {{/models}}
diff --git a/modules/swagger-codegen/src/main/resources/JavaInflector/pojo.mustache b/modules/swagger-codegen/src/main/resources/JavaInflector/pojo.mustache
new file mode 100644
index 000000000000..eea33d346d4d
--- /dev/null
+++ b/modules/swagger-codegen/src/main/resources/JavaInflector/pojo.mustache
@@ -0,0 +1,68 @@
+{{#description}}@ApiModel(description = "{{{description}}}"){{/description}}
+{{>generatedAnnotation}}
+public class {{classname}} {{#parent}}extends {{{parent}}}{{/parent}} {{#serializableModel}}implements Serializable{{/serializableModel}} {
+  {{#vars}}{{#isEnum}}
+
+{{>enumClass}}{{/isEnum}}{{#items.isEnum}}{{#items}}
+
+{{>enumClass}}{{/items}}{{/items.isEnum}}
+  private {{{datatypeWithEnum}}} {{name}} = {{{defaultValue}}};{{/vars}}
+
+  {{#vars}}
+  /**{{#description}}
+   * {{{description}}}{{/description}}{{#minimum}}
+   * minimum: {{minimum}}{{/minimum}}{{#maximum}}
+   * maximum: {{maximum}}{{/maximum}}
+   **/
+  {{#vendorExtensions.extraAnnotation}}{{vendorExtensions.extraAnnotation}}{{/vendorExtensions.extraAnnotation}}
+  @ApiModelProperty({{#required}}required = {{required}}, {{/required}}value = "{{{description}}}")
+  @JsonProperty("{{baseName}}")
+  public {{{datatypeWithEnum}}} {{getter}}() {
+    return {{name}};
+  }
+  public void {{setter}}({{{datatypeWithEnum}}} {{name}}) {
+    this.{{name}} = {{name}};
+  }
+
+  {{/vars}}
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    {{classname}} {{classVarName}} = ({{classname}}) o;{{#hasVars}}
+    return {{#vars}}Objects.equals({{name}}, {{classVarName}}.{{name}}){{#hasMore}} &&
+        {{/hasMore}}{{^hasMore}};{{/hasMore}}{{/vars}}{{/hasVars}}{{^hasVars}}
+    return true;{{/hasVars}}
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash({{#vars}}{{name}}{{#hasMore}}, {{/hasMore}}{{/vars}});
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class {{classname}} {\n");
+    {{#parent}}sb.append("    ").append(toIndentedString(super.toString())).append("\n");{{/parent}}
+    {{#vars}}sb.append("    {{name}}: ").append(toIndentedString({{name}})).append("\n");
+    {{/vars}}sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+}