hirondelle.date4j.Util Maven / Gradle / Ivy
package hirondelle.date4j;
import java.lang.reflect.Array;
import java.util.logging.Logger;
final class Util {
static boolean textHasContent(String aText) {
return (aText != null) && (aText.trim().length() > 0);
}
static String quote(Object aObject){
return SINGLE_QUOTE + String.valueOf(aObject) + SINGLE_QUOTE;
}
static String getArrayAsString(Object aArray){
final String fSTART_CHAR = "[";
final String fEND_CHAR = "]";
final String fSEPARATOR = ", ";
final String fNULL = "null";
if ( aArray == null ) return fNULL;
checkObjectIsArray(aArray);
StringBuilder result = new StringBuilder( fSTART_CHAR );
int length = Array.getLength(aArray);
for ( int idx = 0 ; idx < length ; ++idx ) {
Object item = Array.get(aArray, idx);
if ( isNonNullArray(item) ){
//recursive call!
result.append( getArrayAsString(item) );
}
else{
result.append( item );
}
if ( ! isLastItem(idx, length) ) {
result.append(fSEPARATOR);
}
}
result.append(fEND_CHAR);
return result.toString();
}
static Logger getLogger(Class aClass){
return Logger.getLogger(aClass.getPackage().getName());
}
// PRIVATE
private static final String SINGLE_QUOTE = "'";
private static boolean isNonNullArray(Object aItem){
return aItem != null && aItem.getClass().isArray();
}
private static void checkObjectIsArray(Object aArray){
if ( ! aArray.getClass().isArray() ) {
throw new IllegalArgumentException("Object is not an array.");
}
}
private static boolean isLastItem(int aIdx, int aLength){
return (aIdx == aLength - 1);
}
}