net.n2oapp.framework.boot.graphql.GraphQlUtil Maven / Gradle / Ivy

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package net.n2oapp.framework.boot.graphql;

import java.math.BigDecimal;
import java.time.temporal.Temporal;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.StringJoiner;

/**
 * Утилитный класс для работы с GraphQl
 */
public class GraphQlUtil {

    /**
     * Преобразование структуры объекта в строку, корректную в GraphQl запросе
     *
     * @param obj Входящий объект
     * @return GraphQl строка
     */
    public static String toGraphQlString(Object obj) {
        if (obj == null)
            return null;

        if (obj instanceof Map) {
            StringJoiner joiner = new StringJoiner(", ", "{", "}");
            for (Map.Entry entry : ((Map) obj).entrySet())
                joiner.add(entry.getKey() + ": " + toGraphQlString(entry.getValue()));
            return joiner.toString();
        } else if (obj instanceof List) {
            StringJoiner joiner = new StringJoiner(", ", "[", "]");
            for (Object item : ((List) obj))
                joiner.add(toGraphQlString(item));
            return joiner.toString();
        } else if (obj instanceof Temporal || obj instanceof Date || obj instanceof BigDecimal) {
            return "\"" + obj + "\"";
        } else if (obj instanceof String) {
            return "\"" + escapeJson((String) obj) + "\"";
        } else
            return obj.toString();
    }


    public static String escapeJson(String raw) {
        String escaped = raw;
        escaped = escaped.replace("\\", "\\\\");
        escaped = escaped.replace("\"", "\\\"");
        escaped = escaped.replace("\b", "\\b");
        escaped = escaped.replace("\f", "\\f");
        escaped = escaped.replace("\n", "\\n");
        escaped = escaped.replace("\r", "\\r");
        escaped = escaped.replace("\t", "\\t");
        return escaped;
    }
}