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package com.jdroid.java.collections;
import java.util.Collection;
/**
* A set of useful functions used against a Collection
*/
public abstract class CollectionUtils {
protected CollectionUtils() {
// Helper class
}
/**
* Null-safe check if the specified collection is empty.
*
* Null returns true.
*
* @param coll the collection to check, may be null
* @return true if empty or null
*/
public static boolean isEmpty(Collection coll) {
return (coll == null) || coll.isEmpty();
}
public static boolean isEmptyCollection(Object object) {
if (object instanceof Collection) {
Collection collection = (Collection)object;
return isEmpty(collection);
} else {
return false;
}
}
/**
* Null-safe check if the specified collection is not empty.
*
* Null returns false.
*
* @param coll the collection to check, may be null
* @return true if non-null and non-empty
*/
public static boolean isNotEmpty(Collection coll) {
return !CollectionUtils.isEmpty(coll);
}
}