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javajsfhashmapbigdecimal

Can't get value of Map<BigDecimal, String> by key

I have a map like 

Map<BigDecimal, String> functions = new HashMap<BigDecimal, String>();

When I try to access the value of map from a JSF page, it displays nothing. I checked the size of map and it returns a number, it seems not empty. Here is the JSF page code

<p:dataTable value="#{bean.permissions}" var="permission">  
    <p:column>
        #{bean.functions[permission.functionId]}   
    </p:column>                     
</p:dataTable>

How is this caused and how can I solve it?

Solution

  • BigDecimal is a bad key for HashMap, it uses the BigDecimals memory address as the key, so even if you have 2 equal values, its a different key, try using the toString() of the BigDecimal as the key