Java Utililty Methods Object NVL

List of utility methods to do Object NVL

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Description

The list of methods to do Object NVL are organized into topic(s).

Method

booleanisEmpty(Object obj)
Like the Groovy empty except doesn't consider empty 0 value numbers, false Boolean, etc; only null values, 0 length String (actually CharSequence to include GString, etc), and 0 size Collection/Map are considered empty. 
if (obj == null)
    return true;
if (obj instanceof CharSequence)
    return ((CharSequence) obj).length() == 0;
if (obj instanceof Collection)
    return ((Collection) obj).size() == 0;
return obj instanceof Map && ((Map) obj).size() == 0;
booleanisEmpty(Object value)
Check that value wasn't set by json parser. 
return (null == value) || (value.getClass().equals(Boolean.class) && !((Boolean) value))
        || (value.getClass().equals(Integer.class) && (Integer) value == 0)
        || (value.getClass().equals(Long.class) && (Long) value == 0)
        || (Collection.class.isAssignableFrom(value.getClass()) && ((Collection) value).isEmpty())
        || (Map.class.isAssignableFrom(value.getClass()) && ((Map) value).isEmpty())
        || (value.getClass().equals(Byte.class) && (Byte) value == 0)
        || (value.getClass().equals(Short.class) && (Short) value == 0)
        || (value.getClass().equals(Double.class) && (Double) value == 0)
...
booleanisEmpty(Object... obj)
is Empty 
return obj == null || obj.length == 0 ? true : false;
booleanisNotEmpty(Object object)
is Not Empty 
return isTrue(object);
booleanisNullOrEmpty(final Object obj)
is Null Or Empty 
if (obj == null) {
    return true;
if (obj.getClass().equals(Collection.class)) {
    return ((Collection) obj).size() == 0;
} else {
    if (obj.toString().trim().length() == 0) {
        return true;
...
booleanisNullOrEmpty(Object object, boolean zeroEqualsEmpty)
is Null Or Empty 
if (object == null)
    return true;
if (object instanceof Collection)
    return ((Collection) object).size() == 0;
else if (object instanceof Map)
    return ((Map) object).size() == 0;
else if (object.getClass().isArray())
    return ((Object[]) object).length == 0;
...
booleanisNullOrEmptyOrZero(Object object)
Returns true if the object specified is null or empty (e.g., an empty string, or an empty collection, or in this case a zero-valued number) 
return (isNullOrEmpty(object, true));
booleannvl(Boolean b, boolean defaultValue)
nvl 
if (b == null) {
    return defaultValue;
return b.booleanValue();
Stringnvl(CharSequence source)
nvl 
return nvl(source, "");
Envl(E expr1, E expr2)
Nvl function. 
return (null != expr1) ? expr1 : expr2;