Helper MapHashWithImport

Jan Burse, created Sep 15. 2018
package matula.util.wire;
import matula.util.data.ListArray;
import matula.util.data.MapEntry;
import matula.util.data.MapHash;
/**
* <p>This class provides a map hash with import.</p>
* <p/>
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
public final class MapHashWithImport<K, V> extends MapHash<K, V> {
private ListArray<MapHash<K, V>> imports = new ListArray<MapHash<K, V>>();
/**
* <p>Add an import.</p>
*
* @param map The import.
*/
public void addImport(MapHash<K, V> map) {
if (map == null)
throw new NullPointerException("map missing");
imports.add(map);
}
/**
* <p>Find the entry in the map.</p>
*
* @param key The key.
* @return The entry, or null.
*/
public MapEntry<K, V> getEntry(K key) {
for (int i = 0; i < imports.size(); i++) {
MapEntry<K, V> res = imports.get(i).getEntry(key);
if (res != null)
return res;
}
return super.getEntry(key);
}
/***************************************************************/
/* Object Protocol */
/***************************************************************/
/**
* <p>Returns a string representation of this abstract map.</p>
*
* @return A string representation of this abstract map.
*/
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append(super.toString());
buf.append(imports.toString());
return buf.toString();
}
}

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