Java Utililty Methods Type Coalesce

List of utility methods to do Type Coalesce

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Description

The list of methods to do Type Coalesce are organized into topic(s).

Method

Stringcoalesce(Object... items)
Find first non-null and non-empty item 
if (items == null) {
    return "";
for (Object item : items) {
    if (item != null && ((String) item).length() > 0) {
        return item.toString();
return "";
Stringcoalesce(String str1, String str2)
coalesce 
if (str1 != null)
    return str1;
return str2;
Stringcoalesce(String... strings)
returns the first not empty string {Category} StringUtil {talendTypes} String {param} string("testMe1","testMe2") strings: String. 
for (String s : strings) {
    if (s != null) {
        s = s.trim();
        if (isEmpty(s) == false) {
            return s;
return null;
Stringcoalesce(String... strings)
Same as the SQL COALESCE. 
for (String s : strings) {
    if (!isEmpty(s)) {
        return s;
return "";
Stringcoalesce(String... vals)
Returns the first non-null value in the arguments. 
for (String str : vals) {
    if (str != null)
        return str;
return null;
Stringcoalesce(String[] values)
Returns first not null && not empty String from String[] 
for (String val : values)
    if (checkLen(val))
        return val;
return null;
Tcoalesce(T a, T b)
Return the first not null objects in the list of arguments 
return a == null ? b : a;
Tcoalesce(T o0, T o1)
coalesce 
return o0 != null ? o0 : o1;
Tcoalesce(T preferred, T alternative)
Checks whether a preferred value is valid and returns an alternative value if not. 
return (preferred != null ? preferred : alternative);
Tcoalesce(T value, T whenNullValue)
Devuelve el mismo valor que se pasa en value salvo si es null, en cuyo caso se devuelve whenNullValue. 
return value != null ? value : whenNullValue;