Merge pull request #1601 from wing328/csharp_obj_compare

[C#] Add Equal and GetHashCode to models

modules/swagger-codegen/src/main/resources/csharp/model.mustache

@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.IO;
 using System.Text;
 using System.Collections;
@@ -8,46 +9,103 @@ using Newtonsoft.Json;
 
 {{#models}}
 {{#model}}
-namespace {{packageName}}.Model {
-
-  /// <summary>
-  /// {{description}}
-  /// </summary>
-  [DataContract]
-  public class {{classname}}{{#parent}} : {{{parent}}}{{/parent}} {
-    {{#vars}}
-    /// <summary>
-    /// {{^description}}Gets or Sets {{{name}}}{{/description}}{{#description}}{{{description}}}{{/description}}
-    /// </summary>{{#description}}
-    /// <value>{{{description}}}</value>{{/description}}
-    [DataMember(Name="{{baseName}}", EmitDefaultValue=false)]
-    public {{{datatype}}} {{name}} { get; set; }
-
-    {{/vars}}
+namespace {{packageName}}.Model
+{
 
     /// <summary>
-    /// Get the string presentation of the object
+    /// {{description}}
     /// </summary>
-    /// <returns>String presentation of the object</returns>
-    public override string ToString()  {
-      var sb = new StringBuilder();
-      sb.Append("class {{classname}} {\n");
-      {{#vars}}
-      sb.Append("  {{name}}: ").Append({{name}}).Append("\n");
-      {{/vars}}
-      sb.Append("}\n");
-      return sb.ToString();
-    }
+    [DataContract]
+    public class {{classname}} : IEquatable<{{classname}}>{{#parent}}, {{{parent}}}{{/parent}}
+    {
+        {{#vars}}
+        /// <summary>
+        /// {{^description}}Gets or Sets {{{name}}}{{/description}}{{#description}}{{{description}}}{{/description}}
+        /// </summary>{{#description}}
+        /// <value>{{{description}}}</value>{{/description}}
+        [DataMember(Name="{{baseName}}", EmitDefaultValue=false)]
+        public {{{datatype}}} {{name}} { get; set; }
+  
+        {{/vars}}
+  
+        /// <summary>
+        /// Returns the string presentation of the object
+        /// </summary>
+        /// <returns>String presentation of the object</returns>
+        public override string ToString()
+        {
+            var sb = new StringBuilder();
+            sb.Append("class {{classname}} {\n");
+            {{#vars}}sb.Append("  {{name}}: ").Append({{name}}).Append("\n");
+            {{/vars}}
+            sb.Append("}\n");
+            return sb.ToString();
+        }
+  
+        /// <summary>
+        /// Returns the JSON string presentation of the object
+        /// </summary>
+        /// <returns>JSON string presentation of the object</returns>
+        public {{#parent}} new {{/parent}}string ToJson()
+        {
+            return JsonConvert.SerializeObject(this, Formatting.Indented);
+        }
 
-    /// <summary>
-    /// Get the JSON string presentation of the object
-    /// </summary>
-    /// <returns>JSON string presentation of the object</returns>
-    public {{#parent}} new {{/parent}}string ToJson() {
-      return JsonConvert.SerializeObject(this, Formatting.Indented);
-    }
+        /// <summary>
+        /// Returns true if objects are equal
+        /// </summary>
+        /// <param name="obj">Object to be compared</param>
+        /// <returns>Boolean</returns>
+        public override bool Equals(object obj)
+        {
+            // credit: http://stackoverflow.com/a/10454552/677735
+            return this.Equals(obj as {{classname}});
+        }
 
-}
+        /// <summary>
+        /// Returns true if {{classname}} instances are equal
+        /// </summary>
+        /// <param name="obj">Instance of {{classname}} to be compared</param>
+        /// <returns>Boolean</returns>
+        public bool Equals({{classname}} other)
+        {
+            // credit: http://stackoverflow.com/a/10454552/677735
+            if (other == null)
+                return false;
+
+            return {{#vars}}{{#isNotContainer}}
+                (
+                    this.{{name}} == other.{{name}} ||
+                    this.{{name}} != null &&
+                    this.{{name}}.Equals(other.{{name}})
+                ){{#hasMore}} && {{/hasMore}}{{/isNotContainer}}{{^isNotContainer}}
+                (
+                    this.{{name}} == other.{{name}} ||
+                    this.{{name}} != null &&
+                    this.{{name}}.SequenceEqual(other.{{name}})
+                ){{#hasMore}} && {{/hasMore}}{{/isNotContainer}}{{/vars}};
+        }
+
+        /// <summary>
+        /// Gets the hash code
+        /// </summary>
+        /// <returns>Hash code</returns>
+        public override int GetHashCode()
+        {
+            // credit: http://stackoverflow.com/a/263416/677735
+            unchecked // Overflow is fine, just wrap
+            {
+                int hash = 41;
+                // Suitable nullity checks etc, of course :)
+                {{#vars}}
+                if (this.{{name}} != null)
+                    hash = hash * 57 + this.{{name}}.GetHashCode();
+                {{/vars}}
+                return hash;
+            }
+        }
+
+    }
 {{/model}}
 {{/models}}
 }