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Java - writing a method

Posted on 2013-06-07
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Last Modified: 2013-06-17
I am trying to write a function but I am a beginner in JAVA.  I would like to pass into the method a Value Object.

DepartVO

Section    Count   Expectation  Status
A                11          12                  1
B                5            5                      0
C               21           20                 -1
D                7              6                  -1
E             18            17                -1
Department B
A               12            12                 0
B               22           22                 0
C               10             11               1
D               2                2                0
E              12             11              - 1

Write a method whose input parameters is a Value Object
I want to only adjust count values of Section A or C.

If there A status > 0 then
 if C count > expectation
    add C excess to A count
else
    if C status > 0 then
        if E count > expectation
           add E excess to C count
I only want to process under these conditions

How do I loop through the ValueObject and how do I do a lookup
for the specific section (i.e. Section A or C or E).  

Public string AddjustVal(DepartVO)
{
If section = A and status > 0  then
 // I need to find section C  -  how do I do this?
    If section C count > expectation then
           Add the excess to section count
Else
   If section C  status > 0 then
   // Find section E
  If section E count > expectation
    Add excess to Section C
}
  Return ‘Success’;
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Question by:cookiejar
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7 Comments
 
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Expert Comment

by:CEHJ
Comment Utility
You first need to get your containment right, since it looks like you have nesting. It looks like

class Department {
  private List<SectionInfo> sections;
}

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Expert Comment

by:Valeri
Comment Utility
check this:

import java.util.Map;
import java.util.HashMap;

public class Department {
    private String section;
    private int count;
    private int expectation;
    private int status;
    // create constructor in this way
    public Department(String section, int count, int expectation, int status) {
        this.section = section;
        this.count = count;
        this.expectation = expectation;
        this.status = status;
    }

     public static void main(String[] args) {
         Map<String, Department> departments = new HashMap<String, Department>();
         departments.put("A", new Department("A", 11, 12, 1));
         departments.put("B", new Department("B", 5, 5, 0));
         departments.put("C", new Department("C", 21, 20, -1));
         departments.put("D", new Department("D", 7, 6, -1));
         departments.put("E", new Department("E", 18, 17, -1));

         // departments.get("A") returns department A, departments.get("C") returns department "C"
         // take a look at Map implementations
         if (departments.get("A").getStatus() > 0) {
             if (departments.get("C").getCount() > departments.get("C").getExpectation()) {
                 System.out.println("C count > expectation");
             } else {
                if (departments.get("C").getCount() > 0) {
                    System.out.println("C count > 0");
                }
             }
         }
     } // end main method


    public String getSection() { return section; }
    public int getCount() { return count; }
    public int getExpectation() { return expectation; }
    public int getStatus() { return status; }
}
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Author Comment

by:cookiejar
Comment Utility
Map<String, Department> departments = new HashMap<String, Department>();
The VO is dynamic not set to only A thru E .

So how would the put statement be constructed for the dynamic DepartmentVO?
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Expert Comment

by:CEHJ
Comment Utility
The VO is dynamic not set to only A thru E .
How is that a problem?

In point of fact, 'A thru E' is not an attribute of Department, it's an attribute of 'Section' (or what i called above 'SectionInfo')
What IS an attribute of Department is a List<SectionInfo>, as i said above
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Author Comment

by:cookiejar
Comment Utility
As I've indicated, I am a java beginner,  My question is what is the correct syntax for the Map and Put referencing the SectionInfo List to get specific departments?  For example to get A C E?
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Accepted Solution

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CEHJ earned 500 total points
Comment Utility
afaics, you need something like this (of course you would NOT have a main method in Department but you can run this code as an app)

Section (maybe better than 'SectionInfo' [?])

public class Section {
    private String name;
    private int count;
    private int expectation;
    private int status;

    public Section() {
    }

    public Section(String name, int count, int expectation, int status) {
        this.name = name;
        this.count = count;
        this.expectation = expectation;
        this.status = status;
    }

    public String getName() {
        return this.name;
    }

    public int getCount() {
        return this.count;
    }

    public int getExpectation() {
        return this.expectation;
    }

    public int getStatus() {
        return this.status;
    }

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

    public void setCount(int count) {
        this.count = count;
    }

    public void setExpectation(int expectation) {
        this.expectation = expectation;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public String toString() {
        return String.format("%s=%s,%s=%d,%s=%d,%s=%d", "name", name, "count",
            count, "expectation", expectation, "status", status);
    }
}

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Department
import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.ArrayList;

public class Department {
    private List<Section> sections;

    public Department() {
	sections = new ArrayList<Section>();
    }

    public Department(List<Section> sections) {
	this();
        this.sections.addAll(sections);
    }

    public void addSection(Section section) {
	sections.add(section);
    }

    public List<Section> getSections() {
        return this.sections;
    }

    public void setSections(List<Section> sections) {
        this.sections = sections;
    }

    public String toString() {
        return String.format("%s=%s", "sections", sections);
    }

    public static void main(String[] args) {	
	// TESTING ONLY
	Section s = new Section("A", 11, 2, 1);
	Department d = new Department();
	Map<String, Department> sectionNameToDepartment = new HashMap<String, Department>();
	d.addSection(s);
	sectionNameToDepartment.put(s.getName(), d);
	System.out.println(sectionNameToDepartment.get("A"));
    }
}

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Expert Comment

by:CEHJ
Comment Utility
:)
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