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SynchronizedMap.java
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SynchronizedMap.java
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package me.nallar.collections;
import java.util.AbstractSet;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class SynchronizedMap<K, V> extends HashMap<K, V> {
private KeySet ks;
public SynchronizedMap(final int initialCapacity, final float loadFactor) {
super(initialCapacity, loadFactor);
}
public SynchronizedMap(final int initialCapacity) {
super(initialCapacity);
}
public SynchronizedMap() {
super();
}
public SynchronizedMap(final Map<? extends K, ? extends V> m) {
super(m);
}
@Override
public boolean isEmpty() {
return super.isEmpty();
}
@Override
public V get(final Object key) {
return super.get(key);
}
@Override
public boolean containsKey(final Object key) {
return super.containsKey(key);
}
@Override
public V put(final K key, final V value) {
return super.put(key, value);
}
@Override
public void putAll(final Map<? extends K, ? extends V> m) {
super.putAll(m);
}
@Override
public V remove(final Object key) {
return super.remove(key);
}
@Override
public void clear() {
super.clear();
}
@Override
public boolean containsValue(final Object value) {
return super.containsValue(value);
}
@Override
public Object clone() {
return super.clone();
}
@Override
public Set<K> keySet() {
return ks == null ? (ks = new KeySet(super.keySet())) : ks;
}
@Override
public Collection<V> values() {
return super.values();
}
@Override
public Set<Map.Entry<K, V>> entrySet() {
return super.entrySet();
}
private final class KeySet extends AbstractSet<K> {
private final Set<K> realSet;
KeySet(final Set<K> realSet) {
this.realSet = realSet;
}
@Override
public Iterator<K> iterator() {
return realSet.iterator();
}
@Override
public int size() {
return SynchronizedMap.this.size();
}
@Override
public boolean contains(Object o) {
return containsKey(o);
}
@Override
public boolean remove(Object o) {
return SynchronizedMap.this.remove(o) != null;
}
@Override
public void clear() {
SynchronizedMap.this.clear();
}
}
}