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package bjc.esodata;
import bjc.funcdata.FunctionalMap;
import bjc.funcdata.MapEx;
/**
* Simple implementation of {@link Directory}.
*
* Has a split namespace for data and children.
*
* @author EVE
*
* @param <K>
* The key type of the directory.
*
* @param <V>
* The value type of the directory.
*/
public class SimpleDirectory<K, V> implements Directory<K, V> {
/* Our sub-directories. */
private final MapEx<K, Directory<K, V>> children;
/* Our data. */
private final MapEx<K, V> data;
/** Create a new directory. */
public SimpleDirectory() {
children = new FunctionalMap<>();
data = new FunctionalMap<>();
}
@Override
public Directory<K, V> getSubdirectory(final K key) {
return children.get(key).orElse(null);
}
@Override
public boolean hasSubdirectory(final K key) {
return children.containsKey(key);
}
@Override
public Directory<K, V> putSubdirectory(final K key, final Directory<K, V> val) {
return children.put(key, val);
}
@Override
public boolean containsKey(final K key) {
return data.containsKey(key);
}
@Override
public V getKey(final K key) {
return data.get(key).orElse(null);
}
@Override
public V putKey(final K key, final V val) {
return data.put(key, val);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + (children == null ? 0 : children.hashCode());
result = prime * result + (data == null ? 0 : data.hashCode());
return result;
}
@Override
public boolean equals(final Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (!(obj instanceof SimpleDirectory<?, ?>)) return false;
final SimpleDirectory<?, ?> other = (SimpleDirectory<?, ?>) obj;
if (children == null) {
if (other.children != null) return false;
} else if (!children.equals(other.children)) {
return false;
}
if (data == null) {
if (other.data != null) return false;
} else if (!data.equals(other.data)) {
return false;
}
return true;
}
@Override
public String toString() {
return String.format("SimpleDirectory [children=%s, data=%s]", children, data);
}
}
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