resource-manager/resource-manager-api/src/main/java/de/nclazz/resources/ResourceRepository.java

package de.nclazz.resources;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

public class ResourceRepository {

    private Map<String, ResourceMapping> mappings = new HashMap<>();

    public Optional<ResourceMapping> getMapping(String key) {
        return Optional.ofNullable(this.mappings.get(key));
    }

    public ResourceRepository addMapping(String key, ResourceMapping mapping) {
        this.mappings.put(key, mapping);
        return this;
    }

    public Optional<Resource> getResource(String key) {
        return getMapping(key)
                .flatMap(ResourceMapping::fetchResource);
    }
}