Java Object NVL nvl(String pArg1, String pArg2)

Description

Returns arg2 if arg1 is null or empty, or arg1 otherwise.

License

Open Source License

Parameter

Parameter	Description
pArg1	a parameter
pArg2	a parameter

Declaration

public static String nvl(String pArg1, String pArg2) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    /**/*  w ww .  j  a  v a 2 s. co  m*/
     * Returns arg2 if arg1 is null or empty, or arg1 otherwise.
     * @param pArg1
     * @param pArg2
     * @return
     */
    public static String nvl(String pArg1, String pArg2) {
        return !isNull(pArg1) ? pArg1 : pArg2;
    }

    /**
     * Returns arg2 if arg1 is null, or arg1 otherwise.
     * @param <T>
     * @param pArg1
     * @param pArg2
     * @return
     */
    public static <T> T nvl(T pArg1, T pArg2) {
        return pArg1 != null ? pArg1 : pArg2;
    }

    /**
     * Tests if a string is null or empty.
     * @param pArg1
     * @return True if null or empty.
     */
    public static boolean isNull(String pArg1) {
        return "".equals(pArg1 == null ? "" : pArg1);
    }
}

Related

1. nvl(Object value, String defaultValue)
2. nvl(Object value, String valueWhenNull)
3. nvl(S obj, U nullObject)
4. nvl(String instr, String defaultValue)
5. nvl(String instr, String defaultValue)
6. nvl(String pValue)
7. nvl(String s)
8. nvl(String s, String def)
9. NVL(String s, String valorPorDefecto)