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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12.  
  13.  
  14. 		List<SupportedProduct> configuredProducts = buildProducts();
  15.  
  16. //		2wheeler will return [oil]
  17. //		4wheeler will return [tires, oil]
  18. 		List<String> productNames = getProductNames(configuredProducts, "4wheeler");
  19.  
  20. 		System.out.println(productNames);
  21.  
  22. 	}
  23.  
  24. 	private static List<SupportedProduct> buildProducts() {
  25. 		CategoryDetails c1 = new CategoryDetails("cars", null);
  26. 		SupportedProduct p1 = new SupportedProduct("tires", c1);
  27.  
  28. 		CategoryDetails c2 = new CategoryDetails(null, Arrays.asList(new Category("cars"), new Category("bikes")));
  29. 		SupportedProduct p2 = new SupportedProduct("oil", c2);
  30.  
  31. 		return Arrays.asList(p1, p2);
  32.  
  33. 	}
  34.  
  35. 	private static List<String> getProductNames(List<SupportedProduct> configuredProducts, String requestedGroup) {
  36.  
  37. 		List<String> productNames = new ArrayList<>();
  38.  
  39. 		for (SupportedProduct supportedProduct : configuredProducts) {
  40. 			List<String> categoryNameList = new ArrayList<>();
  41. 			String activeCategoryName = supportedProduct.getCategoryDetails().getActiveCategoryName();
  42. 			if (activeCategoryName == null) {
  43. 				Optional.ofNullable(supportedProduct.getCategoryDetails().getCategories())
  44. 						.orElse(Collections.emptyList()).forEach(category -> categoryNameList.add(category.getName()));
  45. 			} else {
  46. 				categoryNameList.add(activeCategoryName);
  47. 			}
  48. 			for (String catName : categoryNameList) {
  49. 				Division division = DivisionRepo.getDivisionByCatName(catName);
  50. 				if (division != null && division.getGroup() == requestedGroup) {
  51. 					productNames.add(supportedProduct.getProductName());
  52. 				}
  53. 			}
  54. 		}
  55.  
  56. 		return productNames;
  57. 	}
  58. }
  59.  
  60. class SupportedProduct {
  61.  
  62. 	String productName;
  63. 	CategoryDetails categoryDetails;
  64.  
  65. 	public SupportedProduct(String productName, CategoryDetails categoryDetails) {
  66. 		this.productName = productName;
  67. 		this.categoryDetails = categoryDetails;
  68. 	}
  69.  
  70. 	public String getProductName() {
  71. 		return productName;
  72. 	}
  73.  
  74. 	public CategoryDetails getCategoryDetails() {
  75. 		return categoryDetails;
  76. 	}
  77.  
  78. }
  79.  
  80. class CategoryDetails {
  81.  
  82. 	String activeCategoryName;
  83. 	List<Category> categories;
  84.  
  85. 	public CategoryDetails(String activeCategoryName, List<Category> categories) {
  86. 		this.activeCategoryName = activeCategoryName;
  87. 		this.categories = categories;
  88. 	}
  89.  
  90. 	public String getActiveCategoryName() {
  91. 		return activeCategoryName;
  92. 	}
  93.  
  94. 	public List<Category> getCategories() {
  95. 		return categories;
  96. 	}
  97. }
  98.  
  99. class Category {
  100. 	String name;
  101.  
  102. 	public Category(String name) {
  103. 		this.name = name;
  104. 	}
  105.  
  106. 	public String getName() {
  107. 		return name;
  108. 	}
  109. }
  110.  
  111. class Division {
  112.  
  113. 	String group;
  114.  
  115. 	public Division(String group) {
  116. 		this.group = group;
  117. 	}
  118.  
  119. 	public String getGroup() {
  120. 		return group;
  121. 	}
  122.  
  123. }
  124.  
  125. class DivisionRepo {
  126.  
  127. 	static Division getDivisionByCatName(String catName) {
  128. 		if (catName.equals("cars")) {
  129. 			return new Division("4wheeler");
  130. 		} else if (catName.equals("bikes")) {
  131. 			return new Division("2wheeler");
  132. 		}
  133. 		return null;
  134. 	}
  135. }
  136.  
Success #stdin #stdout 0.09s 33436KB
comments (?)
stdin 
Standard input is empty
stdout 
[tires, oil]
https://ideone.com/eImjyb
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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