B4J Question xmlparsing with xml2map

Pedro Caldeira

Active Member
Licensed User
Hello,
I am trying to parse a xml file with the xm2map module

i get a map not initialized in the example code

B4X:
Sub GetElements (m As Map, key As String) As List
    Dim res As List
    If m.ContainsKey(key) = False Then <- line37
        res.Initialize
        Return res
    Else
        Dim value As Object = m.Get(key)
        If value Is List Then Return value
        res.Initialize
        res.Add(value)
        Return res
    End If
End Sub
Error:

Waiting for debugger to connect...
Program started.
Error occurred on line: 37 (Main)
java.lang.RuntimeException: Object should first be initialized (Map).
at anywheresoftware.b4a.AbsObjectWrapper.getObject(AbsObjectWrapper.java:32)
at anywheresoftware.b4a.objects.collections.Map.ContainsKey(Map.java:122)
at b4j.example.main._getelements(main.java:139)
at b4j.example.main._gomain(main.java:108)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:613)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:228)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:159)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:90)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:93)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:77)
at b4j.example.main.main(main.java:29)
 

Enrique Gonzalez R

Well-Known Member
Licensed User
The parameter m is not initialized, most likely your parsing went wrong or you are passing the wrong map to that function.
 

Pedro Caldeira

Active Member
Licensed User
i am using
B4X:
Dim rowset As Map = ParsedData.Get("rowset")
For Each row As Map In GetElements(rowset, "row")
      Dim description As String = row.Get("description")
      Log(description)
Next
file:
the row element repeats several times

B4X:
<table>
 <rowset>
    <row>
      <id>1794540415488854</id>
      <family_id>1794952732344400</family_id>
      <model_id>0</model_id>
      <code></code>
      <order_code>0</order_code>
      <description>So Gambas</description>
      <shortname>So Gambas</shortname>
      <button_name>So Gambas</button_name>
      <button_color>-1</button_color>
      <button_order>17</button_order>
      <productdiscount_id>0</productdiscount_id>
      <productcommission_id>0</productcommission_id>
      <print_sort_order>0</print_sort_order>
      <print_sort_doc>0</print_sort_doc>
      <printzone_id>1794952732344338</printzone_id>
      <taxgroup_id>1003002</taxgroup_id>
      <change_sale_price>0</change_sale_price>
      <weight>0</weight>
      <base_unit_id>11001</base_unit_id>
      <forsale>1</forsale>
      <forpurchase>0</forpurchase>
      <forproduction>0</forproduction>
      <generic_id>0</generic_id>
      <obs></obs>
      <stockconfig_id>7501</stockconfig_id>
      <setexpireday>0</setexpireday>
      <saleprice>0</saleprice>
      <purchaseprice>0</purchaseprice>
      <image_id>0</image_id>
      <default_sale_unit_id>11001</default_sale_unit_id>
      <default_purchase_unit_id>11001</default_purchase_unit_id>
      <default_stock_unit_id>11001</default_stock_unit_id>
      <label_unit_id>11001</label_unit_id>
      <markup>0</markup>
      <status>1</status>
      <product_type>3</product_type>
      <modelgridtype_id>0</modelgridtype_id>
      <default_supplier_id>0</default_supplier_id>
      <fixedsupplier>0</fixedsupplier>
      <creation_date>1485118508079399538</creation_date>
      <productcategory_id>0</productcategory_id>
      <deleted>0</deleted>
    </row>
 </rowset>
</table>
 

Enrique Gonzalez R

Well-Known Member
Licensed User
let me test it, but my guess is that rowset is not in the map you are looking for, probably one map below.
 

Enrique Gonzalez R

Well-Known Member
Licensed User
this code doesnt throw any error

B4X:
    Dim s As String = $"
        <table>
        <rowset>
            <row>
              <id>1794540415488854</id>
              <family_id>1794952732344400</family_id>
              <model_id>0</model_id>
              <code></code>
              <order_code>0</order_code>
              <description>So Gambas</description>
              <shortname>So Gambas</shortname>
              <button_name>So Gambas</button_name>
              <button_color>-1</button_color>
              <button_order>17</button_order>
              <productdiscount_id>0</productdiscount_id>
              <productcommission_id>0</productcommission_id>
              <print_sort_order>0</print_sort_order>
              <print_sort_doc>0</print_sort_doc>
              <printzone_id>1794952732344338</printzone_id>
              <taxgroup_id>1003002</taxgroup_id>
              <change_sale_price>0</change_sale_price>
              <weight>0</weight>
              <base_unit_id>11001</base_unit_id>
              <forsale>1</forsale>
              <forpurchase>0</forpurchase>
              <forproduction>0</forproduction>
              <generic_id>0</generic_id>
              <obs></obs>
              <stockconfig_id>7501</stockconfig_id>
              <setexpireday>0</setexpireday>
              <saleprice>0</saleprice>
              <purchaseprice>0</purchaseprice>
              <image_id>0</image_id>
              <default_sale_unit_id>11001</default_sale_unit_id>
              <default_purchase_unit_id>11001</default_purchase_unit_id>
              <default_stock_unit_id>11001</default_stock_unit_id>
              <label_unit_id>11001</label_unit_id>
              <markup>0</markup>
              <status>1</status>
              <product_type>3</product_type>
              <modelgridtype_id>0</modelgridtype_id>
              <default_supplier_id>0</default_supplier_id>
              <fixedsupplier>0</fixedsupplier>
              <creation_date>1485118508079399538</creation_date>
              <productcategory_id>0</productcategory_id>
              <deleted>0</deleted>
            </row>
        </rowset>
        </table>   
    "$   
       
    Dim xm As Xml2Map
    xm.Initialize
    Dim parseMap0 As Map = xm.Parse(s)
    Dim table As Map = parseMap0.Get("table")
    Dim rowSet As Map = table.Get("rowset")
   
    For Each row As Map In GetElements(rowSet, "row")
        Dim description As String = row.Get("description")
        Log(description)
    Next
 
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