Displaying Hashmap keys and values in a primefaces DataTable

Question

I\'m trying to display a Hashmap in a DataTable, here\'s what i\'m trying to do : I\'ll have a select menu of some products, and an input text for quantity, an \"ajaxified\"

Answer 1

You create Class like this:

public class Product{
    private int id;
    private String productName;
    private int quantitiy;

    // add getters setters here
}

// add product id to map key
Map<Integer,Product> myMap = new HashMap<Integer,Product>();

public Map<Integer,Product> getProductMap() {
   return myMap;
}


public List<Product> getProducts() {
   return new ArrayList<Product>(myMap.values()_;
}

Add datatable value to getProducts() List

Otherwise, product as a map key then,

Map<Product,Integer> myMap = new HashMap<Product,Integer>();

public List<Map.Entry<Product, Integer>> getProducts() {
    Set<Map.Entry<Product, Integer>> productSet = 
                     myMap.entrySet();
    return new ArrayList<Map.Entry<Product, Integer>>(productSet);
}

write primeface page like this way,

<p:dataTable value="#{productBean.products}" var="productEntry">
   <p:column>
      <h:outputText value="#{productEntry.key.productName}" />
   </p:column>
   <p:column>
       <h:outputText value="#{productEntry.value}" />
   </p:column>
</p:dataTable>