Inspired by JavaScript, extend.java is a small library for augmenting a JavaBean instance at runtime.
Extends a JavaBean
import static com.github.jknack.extend.Extend.*;
...
MyObject extended =
extend(object,
$("propertyA", value),
$("propertyB", value),
...
);Derived Properties
import static com.github.jknack.extend.Extend.*;
...
MyObject extended =
extend(object,
$("propertyA", new Function<MyObject, Integer>() {
public Integer apply(MyObject object) {
return ...;
}
})
);Convert a JavaBean to a Map
import static com.github.jknack.extend.Extend.*;
...
Map<String, Object> extended =
map(object,
$("propertyA", value)
);Generated objects (beans and maps) are immutable, so they can't be modified after creation.
- It removes some verbose practices/techniques like DTO creation or similar patterns.
- Help you to apply patterns and techniques like DTO, PresentationModel without frustration.
- If you expose Domain Object from an API you can easily augment the response per use case, security rules, etc.
- Beside you can't access to dynamically created properties: MVC Frameworks, Template Engines, Serializers can!! because they use reflection.
Stable version: 0.1.1
<dependency>
<groupId>com.github.jknack</groupId>
<artifactId>extend.java</artifactId>
<version>${extend.java-version}</version>
</dependency>Development version: 0.1.2-SNAPSHOT
SNAPSHOT versions are NOT synchronized to Central. If you want to use a snapshot version you need to add the https://oss.sonatype.org/content/repositories/snapshots/ repository to your pom.xml.
+- cglib:cglib-nodep:jar:2.2.2
+- org.apache.commons:commons-lang3:jar:3.1