48 lines
822 B
Java
48 lines
822 B
Java
package org.apache.jdbm;
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import java.util.AbstractSet;
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import java.util.Iterator;
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/**
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* Wrapper for HTree to implement java.util.Map interface
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*/
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class HTreeSet<E> extends AbstractSet<E> {
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final HTree<E, Object> map;
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HTreeSet(HTree map) {
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this.map = map;
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}
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public Iterator<E> iterator() {
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return map.keySet().iterator();
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}
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public int size() {
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return map.size();
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}
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public boolean isEmpty() {
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return map.isEmpty();
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}
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public boolean contains(Object o) {
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return map.containsKey(o);
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}
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public boolean add(E e) {
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return map.put(e, Utils.EMPTY_STRING) == null;
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}
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public boolean remove(Object o) {
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return map.remove(o) == Utils.EMPTY_STRING;
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}
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public void clear() {
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map.clear();
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}
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}
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