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mapping data into a collection or data structure (easy)

Posted on 2004-10-14
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Last Modified: 2010-03-31
i have data like below:

licNo                 cusRef          cusName
1                         "005"             "gdgd"
2                         "006"             "llkm"
3                          "007"               "lkjlk"

i need to map this data into a structure where i can access each element data through the licNo
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Question by:kullyN
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12 Comments
 
LVL 86

Accepted Solution

by:
CEHJ earned 250 total points
ID: 12306798
Map m = new HashMap();
CustomerData cd = new CustomerData("005", "gdgd", 1);
m.put(cd.getLicenceNumber(), cd);


...


CustomerData x = (CustomerData)m.get(new Integer(1));
// 'x' now holds 'cd'




............


class CustomerData {
      private String reference;
      private String name;
      private Integer licenceNumber;
      
      public CustomerData(String reference, String name, int licenceNumber) {
            this.reference = reference;
            this.name = name;
            this.licenceNumber = new Integer(licenceNumber);
      }

      public void setLicenceNumber(Integer licenceNumber) {
            this.licenceNumber = licenceNumber;
      }

      public Integer getLicenceNumber() {
            return licenceNumber;
      }


      public void setReference(String reference) {
            this.reference = reference;
      }

      public String getReference() {
            return reference;
      }

      public void setName(String name) {
            this.name = name;
      }

      public String getName() {
            return name;
      }

}
0
 

Author Comment

by:kullyN
ID: 12306907
I have a java class Customer already but this does not include the licNo attribute - the LicNo belongs to Licences class (table in  DB)
In the Object Relational Mapping the Licences are linked to the Customer through the attribute cusRef

im making a copy of data from the DB and then testing a function which retrieves customer via parsing in the licNo.

thus i need this testData structure to check the values retrived from the test
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12306941
OK - just omit the key from the class then. My code will still work - it's just that you won't hold the licNo in the class itself
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Author Comment

by:kullyN
ID: 12307117
how will i be able to map the licNo to the newly created Customer in the map.

at runtime i will run a test which will retrun a set of customer with licNo's
i then need to do a quick check to see which of the licNo match with the data i have and then from there retrieve the results map linked to the licNo

does this make sense?
0
 

Author Comment

by:kullyN
ID: 12307128
what i have so far

                     Map testData = new HashMap();
                Address add1 = new Address(80005023, "UK");
                Customer cus1 = new Customer("0044234", "academics", 9905504, "N", "CNV", add1, null);
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12307207
Not sure what you're posting now kullyN - that's just creating two different objects that don't seem to be related
0
 

Author Comment

by:kullyN
ID: 12307257
is this any better?                  

  Map testData = new HashMap();
               
                Object[] cus1 = {"81","0044234", "academics", "9905504", "N", "CNV", null, null};      // customer 1
                Object[] cus2 = {"1","0044234", "academics", "9905504", "N", "CNV", null, null};        // customer 2
               
                Collection coll = new ArrayList();
                coll.add(cus1);
                coll.add(cus2);
               
                testData.put(CommonConstants.PARAM_RESULTS, coll);
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 12310889
Your customer should be represented by its own abstraction (class)
0
 
LVL 92

Expert Comment

by:objects
ID: 12313557
 testData.put(cus1licNo, cus1);
  testData.put(cus2licNo, cus2);
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