fix: type parameter of search request is encoded incorrectly (#329)

Author: sonallux

spotify-web-api-java-generator/src/main/java/de/sonallux/spotify/generator/java/model/ApiEndpoint.java

@@ -70,13 +70,15 @@ public static class Parameter {
         private final String name;
         private final String javaName;
         private String type;
+        private boolean commaSeparatedListType;
         private String description;
         private String defaultValue;
 
         public Parameter(String name, String type, String description) {
             this.name = name;
             this.javaName = JavaUtils.escapeFieldName(name);
             this.type = type;
+            this.commaSeparatedListType = "java.util.List<String>".equals(type);
             this.description = Markdown2Html.convertToSingleLine(description);
             this.defaultValue = null;
         }

spotify-web-api-java-generator/src/main/resources/templates/request.mustache

@@ -40,7 +40,7 @@ public class {{className}} {
             .addPathParameter("{{name}}", String.valueOf({{javaName}}))
 {{/requiredPathParameters}}
 {{#requiredQueryParameters}}
-            .addQueryParameter("{{name}}", String.valueOf({{javaName}}))
+            .addQueryParameter("{{name}}", {{#commaSeparatedListType}}String.join(",", {{javaName}}){{/commaSeparatedListType}}{{^commaSeparatedListType}}String.valueOf({{javaName}}){{/commaSeparatedListType}})
 {{/requiredQueryParameters}}
 {{#requiredBodyParameters}}
             .addBodyParameter("{{name}}", {{javaName}})

spotify-web-api-java/src/main/generated/de/sonallux/spotify/api/apis/search/SearchRequest.java

@@ -27,7 +27,7 @@ public SearchRequest(ApiClient apiClient, String q, java.util.List<String> type)
         this.apiClient = apiClient;
         this.request = new Request("GET", "/search")
             .addQueryParameter("q", String.valueOf(q))
-            .addQueryParameter("type", String.valueOf(type))
+            .addQueryParameter("type", String.join(",", type))
         ;
     }