Method resolve

core/src/main/java/feign/RequestTemplate.java:182–262

Resolve all expressions using the variable value substitutions provided. Variable values will be pct-encoded, if they are not already. @param variables containing the variable values to use when resolving expressions. @return a new Request Template with all of the variables resolved.

(Map<String, ?> variables)

   * @return a new Request Template with all of the variables resolved.
   */
  public RequestTemplate resolve(Map<String, ?> variables) {

    StringBuilder uri = new StringBuilder();

    /* create a new template form this one, but explicitly */
    RequestTemplate resolved = RequestTemplate.from(this);

    if (this.uriTemplate == null) {
      /* create a new uri template using the default root */
      this.uriTemplate = UriTemplate.create("", !this.decodeSlash, this.charset);
    }

    String expanded = this.uriTemplate.expand(variables);
    if (expanded != null) {
      uri.append(expanded);
    }

    /*
     * for simplicity, combine the queries into the uri and use the resulting uri to seed the
     * resolved template.
     */
    if (!this.queries.isEmpty()) {
      /*
       * since we only want to keep resolved query values, reset any queries on the resolved copy
       */
      resolved.queries(Collections.emptyMap());
      StringBuilder query = new StringBuilder();
      Iterator<QueryTemplate> queryTemplates = this.queries.values().iterator();

      while (queryTemplates.hasNext()) {
        QueryTemplate queryTemplate = queryTemplates.next();
        String queryExpanded = queryTemplate.expand(variables);
        if (Util.isNotBlank(queryExpanded)) {
          query.append(queryExpanded);
          if (queryTemplates.hasNext()) {
            query.append("&");
          }
        }
      }

      String queryString = query.toString();
      if (!queryString.isEmpty()) {
        Matcher queryMatcher = QUERY_STRING_PATTERN.matcher(uri);
        if (queryMatcher.find()) {
          /* the uri already has a query, so any additional queries should be appended */
          uri.append("&");
        } else {
          uri.append("?");
        }
        uri.append(queryString);
      }
    }

    /* add the uri to result */
    resolved.uri(uri.toString());

    /* headers */
    if (!this.headers.isEmpty()) {