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package bjc.utils.esodata;
import bjc.utils.funcdata.FunctionalMap;
import bjc.utils.funcdata.IMap;
/**
* Simple implementation of {@link Directory}.
*
* Has a unified 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 UnifiedDirectory<K, V> implements Directory<K, V> {
private IMap<K, Directory<K, V>> children;
private IMap<K, V> data;
/**
* Create a new directory.
*/
public UnifiedDirectory() {
children = new FunctionalMap<>();
data = new FunctionalMap<>();
}
@Override
public Directory<K, V> getSubdirectory(K key) {
return children.get(key);
}
@Override
public boolean hasSubdirectory(K key) {
return children.containsKey(key);
}
@Override
public Directory<K, V> putSubdirectory(K key, Directory<K, V> val) {
if(data.containsKey(key))
throw new IllegalArgumentException("Key " + key + " is already used for data.");
return children.put(key, val);
}
@Override
public boolean containsKey(K key) {
return data.containsKey(key);
}
@Override
public V getKey(K key) {
return data.get(key);
}
@Override
public V putKey(K key, V val) {
if(children.containsKey(key))
throw new IllegalArgumentException("Key " + key + " is already used for sub-directories.");
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(Object obj) {
if(this == obj) return true;
if(obj == null) return false;
if(getClass() != obj.getClass()) return false;
UnifiedDirectory<?, ?> other = (UnifiedDirectory<?, ?>) 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() {
StringBuilder builder = new StringBuilder();
builder.append("UnifiedDirectory [children=");
builder.append(children);
builder.append(", data=");
builder.append(data);
builder.append("]");
return builder.toString();
}
}
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