Examples of org.apache.commons.collections.map.MultiKeyMap

Package org.apache.commons.collections.map

Examples of org.apache.commons.collections.map.MultiKeyMap

org.apache.commons.collections.map.MultiKeyMap
A Map implementation that uses multiple keys to map the value.
This class is the most efficient way to uses multiple keys to map to a value. The best way to use this class is via the additional map-style methods. These provide get, containsKey, put and remove for individual keys which operate without extra object creation.
The additional methods are the main interface of this map. As such, you will not normally hold this map in a variable of type Map.
The normal map methods take in and return a {@link MultiKey}. If you try to use put() with any other object type a ClassCastException is thrown. If you try to use null as the key in put() a NullPointerException is thrown.
This map is implemented as a decorator of a AbstractHashedMap which enables extra behaviour to be added easily.
- MultiKeyMap.decorate(new LinkedMap()) creates an ordered map.
- MultiKeyMap.decorate(new LRUMap()) creates an least recently used map.
- MultiKeyMap.decorate(new ReferenceMap()) creates a garbage collector sensitive map.
Note that IdentityMap and ReferenceIdentityMap are unsuitable for use as the key comparison would work on the whole MultiKey, not the elements within.
As an example, consider a least recently used cache that uses a String airline code and a Locale to lookup the airline's name:
```
 private MultiKeyMap cache = MultiKeyMap.decorate(new LRUMap(50)); public String getAirlineName(String code, String locale) { String name = (String) cache.get(code, locale); if (name == null) { name = getAirlineNameFromDB(code, locale); cache.put(code, locale, name); } return name; } 
```
@since Commons Collections 3.1 @version $Revision: 1.3 $ $Date: 2004/06/07 21:00:58 $ @author Stephen Colebourne

        final QName service = (QName) map.get("service");
        final String port = (String) map.get("port");
        EndpointConfiguration endpointConfig = null;


        if (bpelPackageConfiguration != null) {
            MultiKeyMap endpointConfigs = bpelPackageConfiguration.getEndpoints();
            if (endpointConfigs.size() > 0) {
                endpointConfig = (EndpointConfiguration) endpointConfigs.get(service.getLocalPart(),
                                                            service.getNamespaceURI(), port);
                if (endpointConfig == null) {
                    endpointConfig = (EndpointConfiguration) endpointConfigs.get(
                            service.getLocalPart(), service.getNamespaceURI(), null);
                }
            }
        }
        return endpointConfig;

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   * la 86 chei pe row si 212 chei pe column am 18.232 (86 x 212) combinatii.
   * Daca in getValues se sta 3,25 ms (cum am obtinut) rezulta un total de 
   * 5576 ms. Cred ca ar trebuii sa parcurg o singura data inregistrarile din baza.
   */
  private MultiKeyMap getData(PivotField dataField) {
    MultiKeyMap data = new MultiKeyMap();
    List<List<Object>> rowKeys = getRowKeys();
    System.out.println("rowKeys.size() = " + rowKeys.size());
    List<List<Object>> columnKeys = getColumnKeys();
    System.out.println("columnKeys.size() = " + columnKeys.size());
    
    List<PivotField> rowFields = getFields(PivotField.Area.ROW);
    List<PivotField> columnFields = getFields(PivotField.Area.COLUMN);
    for (List<Object> rowKey : rowKeys) {
      for (List<Object> columnKey : columnKeys) {
        Map<Integer, Object> rowFilter = getFilter(rowFields, rowKey);
        Map<Integer, Object> columnFilter = getFilter(columnFields, columnKey);
        final Map<Integer, Object> filter = new HashMap<Integer, Object>(rowFilter);
        filter.putAll(columnFilter);        
        List<Object> values = getValues(dataField, filter);
        if (!CollectionUtils.isEmpty(values) || dataField.getFieldCalculation()!=null) {
          /*
          System.out.println("filter = " + filter);
          System.out.println("values = " + values);
          System.out.println(values.size());
          */
          Object summary = PivotUtils.getSummary(dataField, values, new FieldValueProvider() {            
            @Override
            public Object getFieldValue(PivotField field) {          
              List<Object> fieldValues = getValues(field, filter);
              return field.getAggregator().init().addAll(fieldValues).getResult();
            }
          });
//          System.out.println("summary = " + summary);
          data.put(rowKey, columnKey, summary);
        }
      }
    }
    
    return data;

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        if (cachedValues == null) {
            if ( value == null) {
                // nothing to cache and no cached values.
                return;
            }
            cachedValues = new MultiKeyMap();
            flowManagement.registerForCacheClearing();
        }
        if ( value == null ) {
            cachedValues.remove(namespace, key);
        } else {

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Related Classes of org.apache.commons.collections.map.MultiKeyMap

org.amplafi.flow.impl.FlowStateImpl

org.apache.commons.collections.keyvalue.MultiKey

org.apache.commons.collections.MapIterator

org.wso2.carbon.bpel.ode.integration.store.ProcessConfigurationImpl

ro.fortsoft.wicket.pivot.DefaultPivotModel

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