Java AnnotatedCreatorCollector-class And Method Code Example
Here is an example of how to use the AnnotatedCreatorCollector class in the com.fasterxml.jackson.databind package to collect the constructor, factory method, and property-based creators annotated with JsonCreator annotation:
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.introspect.Annotated;
import com.fasterxml.jackson.databind.introspect.AnnotatedConstructor;
import com.fasterxml.jackson.databind.introspect.AnnotatedMethod;
import com.fasterxml.jackson.databind.introspect.AnnotatedParameter;
import com.fasterxml.jackson.annotation.JsonCreator;
public class Example {
public static void main(String[] args) throws Exception {
ObjectMapper mapper = new ObjectMapper();
Annotated annotated = mapper.getDeserializationConfig().introspect(Person.class);
AnnotatedCreatorCollector collector = new AnnotatedCreatorCollector(annotated);
// Collect all the constructor, factory method, and property-based creators annotated with @JsonCreator
collector.collectCreators(annotated, JsonCreator.class);
// Print the constructor, factory method, and property-based creators
System.out.println("Constructors:");
for (AnnotatedConstructor ctor : collector.getAnnotatedConstructors()) {
System.out.println("\t" + ctor);
}
System.out.println("Factory Methods:");
for (AnnotatedMethod factory : collector.getAnnotatedFactoryMethods()) {
System.out.println("\t" + factory);
}
System.out.println("Property-based creators:");
for (AnnotatedMethod creator : collector.getAnnotatedWithCreator()) {
System.out.println("\t" + creator);
}
}
}
class Person {
private String name;
private int age;
@JsonCreator
public Person(String name, int age) {
this.name = name;
this.age = age;
}
@JsonCreator
public static Person create(String name, int age) {
return new Person(name, age);
}
@JsonCreator
public void setData(String name, int age) {
this.name = name;
this.age = age;
}
// getters and setters
}
In this example, an instance of the ObjectMapper class is used to create an instance of AnnotatedCreatorCollector. The collectCreators() method is used to collect all the constructor, factory method, and property-based creators annotated with JsonCreator. The collected creators are then printed to the console.
It's important to notice that this is a basic example, and you may need to adapt it to your specific use case and configuration. Also, the AnnotatedCreatorCollector is not a class that you need to instantiate, it is used