poussecafe.injector.DependencyInjector Maven / Gradle / Ivy
package poussecafe.injector;
import java.util.Map;
import java.util.Objects;
public abstract class DependencyInjector {
private Map, Object> injectableServices;
protected DependencyInjector(Map, Object> injectableServices) {
setInjectableServices(injectableServices);
}
private void setInjectableServices(Map, Object> injectableServices) {
Objects.requireNonNull(injectableServices, "Injectable services cannot be null");
this.injectableServices = injectableServices;
}
public void trySettingDependency() {
if (isValidTarget()) {
setDependencyIfResolved();
}
}
protected abstract boolean isValidTarget();
private void setDependencyIfResolved() {
Class dependencyType = getTargetType();
Object dependency = injectableServices.get(dependencyType);
if (dependency != null) {
setResolvedDependency(dependency);
}
}
protected abstract Class getTargetType();
protected abstract void setResolvedDependency(Object dependency);
}