In this post under Java Core, I will introduce you to newly added “Text Block” feature. This feature was added as part of Java 15. Pre Java 15, if we have to declare a multiline string we used to declare it as shown below String result = "Since Java 15, text blocks are \n" +…… Continue reading Text Block simple example
Using Comparable with multiple fields
In this post under Java Collections, I will show an example of how to use Comparable interface when we need to sort collections on multiple fields For our example, we will sort a collections of employee objects. I need to sort the collections of employee objects in ascending order first using there name and then…… Continue reading Using Comparable with multiple fields
Pattern matching with instanceof
Hi all, in this post under Java pattern matching section, I will introduce you to pattern matching and how to use it with instanceof operator. Please don’t confuse java pattern matching with regex pattern matching Regex pattern matching checks whether a given text matches a text pattern and may optionally extract parts of the text.…… Continue reading Pattern matching with instanceof
DictionaryRule with TernaryDictionary example
In this post under Passay, I will show with example, how to use “TernaryDictionary” with “DictionaryRule”. For recap, DictionaryRule will check whether the user inputed password matches a word amoung a dictionary of words. If it matches, the validation fails or else passes. The dictionary of words can be implemented in many ways but for…… Continue reading DictionaryRule with TernaryDictionary example
Passing context information to custom mapping method
In this post under MapStruct, I will explain with example how to pass context information to custom mapping methods. In the previous post, I have explained how to tell MapStruct which is the context information i.e., by annotating it with “@Context” annotation as shown below @Mapping(target = "addressDTO", source = "address") PersonDTO personToPersonDTO(Person person, @Context…… Continue reading Passing context information to custom mapping method
Passing context information to mapping method
In this post under MapStruct, I will show with example how to pass context information to the mapping methods. For our example, I will have “Person” entity and map it to “PersonDTO” entity. Below is the class structure of “Person” class Person package package34; public class Person { private int id; private String name; private…… Continue reading Passing context information to mapping method
CollectionUtils transform method
In this post under Apache Collections, I will show with example, how to use and purpose of “transform” static method in Apache Collections “CollectionUtils” class. The “transform” method can be used to transform each elements in a collection. The transformer logic is implemented by implementing the “Transformer” functional interface. Please note it doesn’t create a…… Continue reading CollectionUtils transform method
Using multiple source object in expressions
In previous posts under MapStruct, I introduced you guys to expressions and then I showed how we can use a source object in an expressions. Just to be thorough, in this post under MapStruct, I will show with example that we can refer multiple source objects in an expressions. For our example, we use below…… Continue reading Using multiple source object in expressions
Ordering multiple BeanPostProcessor implementations example
In this post under Spring Core, I will show with example how to order multiple “BeanPostProcessor” interface implementations. To order multiple “BeanPostProcessor” implementations, each implementations much implement “Ordered” interface and provide order number in the interface “getOrder” method. Note: Ordering of “BeanPostProcessor” implementations only work with “@Component” annotation and not with “@Bean” annotation. For our…… Continue reading Ordering multiple BeanPostProcessor implementations example
DictionaryRule with WordListDictionary example
In this post under Passay, I will show with example what is the purpose and how to use “DictionaryRule”. DictionaryRule will check whether the user inputed password matches a word amoung a dictionary of words. If it matches, the validation fails or else passes. The dictionary of words can be implemented in many ways but…… Continue reading DictionaryRule with WordListDictionary example
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