Examples of org.apache.commons.collections.MultiHashMap

org.apache.commons.collections.MultiHashMap
MultiHashMap is the default implementation of the {@link org.apache.commons.collections.MultiMap MultiMap} interface.
A MultiMap is a Map with slightly different semantics. Putting a value into the map will add the value to a Collection at that key. Getting a value will return a Collection, holding all the values put to that key.
This implementation uses an ArrayList as the collection. The internal storage list is made available without cloning via the get(Object) and entrySet() methods. The implementation returns null when there are no values mapped to a key.
For example:
```
 MultiMap mhm = new MultiHashMap(); mhm.put(key, "A"); mhm.put(key, "B"); mhm.put(key, "C"); List list = (List) mhm.get(key);
```
list will be a list containing "A", "B", "C". @since Commons Collections 2.0 @version $Revision: 1.20 $ $Date: 2004/06/09 22:11:54 $ @author Christopher Berry @author James Strachan @author Steve Downey @author Stephen Colebourne @author Julien Buret @author Serhiy Yevtushenko

            }
        }


        public Object unmarshal(HierarchicalStreamReader reader,
                UnmarshallingContext context) {
            MultiHashMap map = new MultiHashMap();
            
            while( reader.hasMoreChildren() ) {
                reader.moveDown();
                
                Object o = 0;
                if ( "dataStore".equals( reader.getNodeName() ) ) {
                    o = context.convertAnother( map, DataStoreInfoImpl.class );
                }
                else {
                    o = context.convertAnother( map, CoverageStoreInfoImpl.class );
                }
                map.put( o.getClass(), o );
                
                reader.moveUp();
            }
            
            return map;

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    private void addFieldsToParsedObject(Document doc, ParsedObject o)
    {
        try
        {
            MultiMap multiKeywords = new MultiHashMap();
            MultiMap multiFields = new MultiHashMap();
            HashMap fieldMap = new HashMap();
            
            Field classNameField = doc.getField(ParsedObject.FIELDNAME_CLASSNAME);
            if(classNameField != null)
            {

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            result.setClassName(pd.getClass().getName());
            result.setKey(KEY_PREFIX + pd.getUniqueName());
            result.setType(ParsedObject.OBJECT_TYPE_PORTLET);
            
            //TODO: this is common to PAs as well, possible refactor
            MultiHashMap fieldMap = new MultiHashMap();
            fieldMap.put(ParsedObject.ID, pd.getPortletName());
            
            PortletApplication pa = (PortletApplication)pd.getApplication();
            fieldMap.put(PORTLET_APPLICATION, pa.getName()); 
            
            Collection mdFields = pd.getMetadata().getFields();
            for (Iterator fieldIter = mdFields.iterator(); fieldIter.hasNext();)
            {
                LocalizedField field = (LocalizedField) fieldIter.next();                
                fieldMap.put(field.getName(), field.getValue());
            }
            
            //Handle descriptions
            for (Description d : pd.getDescriptions())
            {
                fieldMap.put(ParsedObject.FIELDNAME_DESCRIPTION, d.getDescription());
            }
            
            //Handle keywords and titles
            for (DisplayName d : pd.getDisplayNames())
            {
                fieldMap.put(ParsedObject.FIELDNAME_TITLE, d.getDisplayName());
            }
            
            HashSet keywordSet = new HashSet();
            
            for (Language lang : pd.getLanguages())
            {
                fieldMap.put(ParsedObject.FIELDNAME_TITLE, lang.getTitle());
                fieldMap.put(ParsedObject.FIELDNAME_TITLE, lang.getShortTitle());
                for (String keyword : lang.getKeywordList())
                {
                    keywordSet.add(keyword);
                }
            }

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          result.setTitle(pa.getName());
          result.setKey(KEY_PREFIX + pa.getName());
          result.setType(ParsedObject.OBJECT_TYPE_PORTLET_APPLICATION);
          result.setClassName(pa.getClass().getName());
          
          MultiHashMap fieldMap = new MultiHashMap();
          fieldMap.put(ParsedObject.ID, pa.getName());
          
          Collection fields = pa.getMetadata().getFields();
          for (Iterator fieldIter = fields.iterator(); fieldIter.hasNext();)
            {
                LocalizedField field = (LocalizedField) fieldIter.next();
                fieldMap.put(field.getName(), field.getValue());
                //this.fields.add(field.getName());
            }
          
          result.setFields(fieldMap);
        }

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        GetFeatureRequest gft = GetFeatureRequest.adapt(getFeature.getParameters()[0]);
        
        List featureCollections = results.getFeature();


        //round up the info objects for each feature collection
        MultiHashMap ns2metas = new MultiHashMap();
        
        for (Iterator fc = featureCollections.iterator(); fc.hasNext();) {
            SimpleFeatureCollection features = (SimpleFeatureCollection) fc.next();
            SimpleFeatureType featureType = features.getSchema();


            //load the metadata for the feature type
            String namespaceURI = featureType.getName().getNamespaceURI();
            FeatureTypeInfo meta = catalog.getFeatureTypeByName( namespaceURI, featureType.getTypeName() );
            if(meta == null)
                throw new WFSException(gft, "Could not find feature type " + namespaceURI + ":" 
                    + featureType.getTypeName() + " in the GeoServer catalog");


            NamespaceInfo ns = catalog.getNamespaceByURI( namespaceURI );
            ns2metas.put( ns, meta );
        }


        Collection<FeatureTypeInfo> featureTypes = ns2metas.values();
        
        //create the encoder
        ApplicationSchemaXSD xsd = new ApplicationSchemaXSD( null, catalog, gft.getBaseUrl(), 
            org.geotools.wfs.v1_0.WFS.getInstance(), featureTypes );
        Configuration configuration = new ApplicationSchemaConfiguration( xsd, new org.geotools.wfs.v1_0.WFSConfiguration() );
        
        Encoder encoder = new Encoder(configuration);
        //encoder.setEncoding(wfs.getCharSet());
        
       encoder.setSchemaLocation(org.geoserver.wfs.xml.v1_1_0.WFS.NAMESPACE,
               buildSchemaURL(gft.getBaseUrl(), "wfs/1.0.0/WFS-basic.xsd"));


        //declare application schema namespaces
        Map<String, String> params = params("service", "WFS", "version", "1.0.0", "request", "DescribeFeatureType");
        for (Iterator i = ns2metas.entrySet().iterator(); i.hasNext();) {
            Map.Entry entry = (Map.Entry) i.next();


            NamespaceInfo ns = (NamespaceInfo) entry.getKey();
            String namespaceURI = ns.getURI();

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            return MultiHashMap.class.equals(type);
        }


        public void marshal(Object source, HierarchicalStreamWriter writer,
                MarshallingContext context) {
            MultiHashMap map = (MultiHashMap) source;
            for (Object v : map.values()) {
                if (v instanceof DataStoreInfo) {
                    writer.startNode("dataStore");
                    context.convertAnother(v);
                    writer.endNode();
                }

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            }
        }


        public Object unmarshal(HierarchicalStreamReader reader,
                UnmarshallingContext context) {
            MultiHashMap map = new MultiHashMap();
            
            while( reader.hasMoreChildren() ) {
                reader.moveDown();
                
                Object o = 0;
                if ( "dataStore".equals( reader.getNodeName() ) ) {
                    o = context.convertAnother( map, DataStoreInfoImpl.class );
                }
                else {
                    o = context.convertAnother( map, CoverageStoreInfoImpl.class );
                }
                map.put( o.getClass(), o );
                
                reader.moveUp();
            }
            
            return map;

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            resolve(ns);
        }
        
        //stores
        if ( stores == null ) {
            stores = new MultiHashMap();
        }
        for ( Object o : stores.values() ) {
            resolve((StoreInfoImpl)o);
        }
        
        //styles
        if ( styles == null ) {
            styles = new ArrayList<StyleInfo>();
        }
        for ( StyleInfo s : styles ) {
            resolve(s);
        }
        
        //resources
        if ( resources == null ) {
            resources = new MultiHashMap();    
        }
        for( Object o : resources.values() ) {
            resolve((ResourceInfo)o);
        }

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  /*
   * Takes all the report's charts and inserts them in their corresponding bands
   */
  protected void layoutCharts() {
    //Pre-sort charts by group column
    MultiMap mmap = new MultiHashMap();
    for (Iterator iter = getReport().getCharts().iterator(); iter.hasNext();) {
      DJChart djChart = (DJChart) iter.next();
      mmap.put(djChart.getColumnsGroup(), djChart);
    }


    for (Iterator iterator = mmap.keySet().iterator(); iterator.hasNext();) {
      Object key =  iterator.next();
      Collection charts = (Collection) mmap.get(key);
      ArrayList l = new ArrayList(charts);
      //Reverse iteration of the charts to meet insertion order
      for (int i = l.size(); i > 0; i--) {
        DJChart djChart = (DJChart) l.get(i-1);
        JRDesignChart chart = createChart(djChart);


        //Charts has their own band, so they are added in the band at Y=0
        JRDesignBand band = createGroupForChartAndGetBand(djChart);
        band.addElement(chart);
      }
    }
    
    //Pre-sort charts by group column
    mmap = new MultiHashMap();
    for (Iterator iter = getReport().getNewCharts().iterator(); iter.hasNext();) {
      ar.com.fdvs.dj.domain.chart.DJChart djChart = (ar.com.fdvs.dj.domain.chart.DJChart) iter.next();
      mmap.put(djChart.getDataset().getColumnsGroup(), djChart);
    }


    for (Iterator iterator = mmap.keySet().iterator(); iterator.hasNext();) {
      Object key =  iterator.next();
      Collection charts = (Collection) mmap.get(key);
      ArrayList l = new ArrayList(charts);
      //Reverse iteration of the charts to meet insertion order
      for (int i = l.size(); i > 0; i--) {
        ar.com.fdvs.dj.domain.chart.DJChart djChart = (ar.com.fdvs.dj.domain.chart.DJChart) l.get(i-1);
        String name = "chart_" + (i-1);

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  /*
   * Takes all the report's charts and inserts them in their corresponding bands
   */
  protected void layoutCharts() {
    //Pre-sort charts by group column
    MultiMap mmap = new MultiHashMap();
    for (Iterator iter = getReport().getCharts().iterator(); iter.hasNext();) {
      DJChart djChart = (DJChart) iter.next();
      mmap.put(djChart.getColumnsGroup(), djChart);
    }


    for (Iterator iterator = mmap.keySet().iterator(); iterator.hasNext();) {
      Object key =  iterator.next();
      Collection charts = (Collection) mmap.get(key);
      ArrayList l = new ArrayList(charts);
      //Reverse iteration of the charts to meet insertion order
      for (int i = l.size(); i > 0; i--) {
        DJChart djChart = (DJChart) l.get(i-1);
        JRDesignChart chart = createChart(djChart);

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