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package net.sf.basedb.varsearch.util; |
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import java.util.Collection; |
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import java.util.TreeSet; |
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/** |
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Variant of a TreeSet that simply ignore null values instead of |
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throwing an exception. |
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@author nicklas |
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*/ |
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public class NullSafeTreeSet<E> |
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extends TreeSet<E> |
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{ |
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|
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private static final long serialVersionUID = 3606992818619812054L; |
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@Override |
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public boolean add(E e) |
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{ |
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return e == null ? false : super.add(e); |
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} |
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@Override |
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public boolean addAll(Collection<? extends E> c) |
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{ |
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if (c == null || c.isEmpty()) return false; |
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boolean modified = false; |
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for (E e : c) |
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{ |
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if (add(e)) modified = true; |
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} |
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return modified; |
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} |
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} |