public static Condition newRefererCondition(StringComparisonType comparisonType, String value) {
        return new StringCondition(comparisonType, REFERER_CONDITION_KEY, value);
    }
Constructs a new access control policy condition that tests the incoming
request's referer field against the specified value, using the specified
comparison type.

@param comparisonType
           The type of string comparison to perform when testing an
           incoming request's referer field with the specified value.
@param value
           The value against which to compare the incoming request's
           referer field.

@return A new access control policy condition that tests an incoming
        request's referer field.
aws-java-sdk-core/src/main/java/com/amazonaws/auth/policy/conditions/ConditionFactory.java