net.cassite.pure.ioc.handlers.ParamHandlerChain Maven / Gradle / Ivy

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Lightweight type and annotation based dependency injection framework

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package net.cassite.pure.ioc.handlers;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class ParamHandlerChain {

        private static final Logger LOGGER = LoggerFactory.getLogger(ParamHandlerChain.class);

        private final Iterator it;

        public ParamHandlerChain(List handlers, Annotation[] anns) {
                List list = new ArrayList<>();
                handlers.forEach(h -> {
                        if (h.canHandle(anns)) {
                                list.add(h);
                        }
                });
                list.add(EmptyHandler.getInstance());

                LOGGER.debug("Generate Param Chain with Handlers: {}", list);

                it = list.iterator();
        }

        public ParamAnnotationHandler next() {
                return it.next();
        }
}