IntelliJ IDEA toString templates for JSON with null checker

IntelliJ IDEA JSON toString template

public java.lang.String toString() {
final java.lang.StringBuilder sb = new java.lang.StringBuilder("{");
#set ($i = 0)
#foreach ($member in $members)
    #if ($member.string)
    if (org.apache.commons.lang3.StringUtils.isNotBlank(($member.accessor))) {
    #elseif ($member.date || $member.primitive || $member.numeric || $member.boolean)
    if (($member.accessor) != null) {
    #elseif (($member.stringArray))
    if (($member.accessor) != null && ($member.accessor).length > 0) {
    #elseif($member.list)
    if ($member.accessor != null && !($member.accessor).isEmpty()) {
    #end
    #if ($i == 0)
    sb.append("##
    #else
    sb.append(",##
    #end
    #if ($member.stringArray)
    \"$member.name\":");
    #elseif ($member.string || $member.date)
    \"$member.name\":\"")
    #elseif($member.map||$member.collection)
    \"$member.name\":");
    #else
    \"$member.name\":")
    #end
    #if ($member.stringArray)
    sb.append("[");
    final int stringArrayLength = ($member.accessor).length;
    for (int i = 0; i < stringArrayLength; i++) {
    sb.append("\"").append(($member.accessor)[i]).append("\"");
    if (i < stringArrayLength - 1) {
    sb.append(",");
    } else {
    sb.append("]");
    }
    }
    }
    #elseif ($member.primitiveArray || $member.objectArray)
    .append(java.util.Arrays.toString($member.accessor));
    #elseif ($member.string || $member.date)
    .append($member.accessor).append('\"'); }
    #elseif($member.list)
    sb.append("[");
    final int listSize = ($member.accessor).size();
    for (int i = 0; i < listSize; i++) {
    final Object listValue=($member.accessor).get(i);
    if (listValue instanceof CharSequence) {
    sb.append("\"").append(java.util.Objects.toString(listValue,"")).append("\"");
    } else {
    sb.append(java.util.Objects.toString(listValue,""));
    }
    if (i < listSize - 1) {
    sb.append(",");
    } else {
    sb.append("]");
    }
    }
    }
    #elseif($member.map)
    if (($member.accessor) != null && !($member.accessor).isEmpty()) {
    sb.append("{");
    final Set<?> mapKeySet=($member.accessor).keySet();
    for (java.lang.Object mapKey: mapKeySet) {
    final Object mapValue=($member.accessor).get(mapKey);
    sb.append("\"").append(mapKey).append("\":\"").append(java.util.Objects.toString(mapValue,"")).append("\",");
    }
    sb.replace(sb.length() - 1, sb.length(), "}");
    } else {
    sb.append("{}");
    }
    #elseif($member.collection)
    if (($member.accessor) != null && !($member.accessor).isEmpty()) {
    sb.append("[");
    for (java.lang.Object collectionValue: $member.accessor) {
    sb.append("\"").append(java.util.Objects.toString(collectionValue,"")).append("\",");
    }
    sb.replace(sb.length() - 1, sb.length(), "]");
    } else {
    sb.append("[]");
    }
    #else
    .append($member.accessor);
    #end
    #set ($i = $i + 1)
#end
sb.append('}');
return sb.toString();
}