org.jvnet.hk2.annotations.Inject Maven / Gradle / Ivy
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package org.jvnet.hk2.annotations;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
/**
* Annotation to define a required resource for a component.
* The HK2 runtime injects all instance variables annotated with
* @Inject as well as setter methods.
* Examples:
@Inject("GlassfishMBeanServer")
MBeanServer mbeanserver;
@Inject // unnamed
MBeanServer mbeanserver;
*
* @see org.jvnet.hk2.component.Habitat
*
* @author Jerome Dochez
*/
@Retention(RUNTIME)
@Target({METHOD,FIELD})
public @interface Inject {
/**
* Returns the name.
* @return name of the resource
*/
public String name() default "";
/**
* When true, it is not an error if not present.
* When false, a failure occurs when not present.
@return true if optional, false otherwise
*/
public boolean optional() default false;
}