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package eu.dnetlib.enabling.is.sn.resourcestate;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Map;
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/**
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*
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* dummy implementation of the resource state subscription DAO layer, using an in-memory map.
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*
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* @author marko
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*
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*/
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public class MemoryResourceStateSubscriptionDAOImpl implements ResourceStateSubscriptionDAO {
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/**
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* by id.
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*/
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private Map<String, ResourceStateSubscription> byId = new HashMap<String, ResourceStateSubscription>();
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/**
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* groups subscriptions with the same prefix and type.
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*/
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private Map<String, Collection<ResourceStateSubscription>> byPrefixAndType = new HashMap<String, Collection<ResourceStateSubscription>>();
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/**
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* {@inheritDoc}
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*
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* @see eu.dnetlib.enabling.is.sn.resourcestate.ResourceStateSubscriptionDAO#listSubscriptions(java.lang.String,
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* java.lang.String, java.lang.String)
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*/
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@Override
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public Collection<ResourceStateSubscription> listSubscriptions(final String prefix, final String resourceType, final String resourceId) {
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return orDefault(getByPrefixAndType().get(prefix + "/" + resourceType + "/" + resourceId));
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}
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/**
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* {@inheritDoc}
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*
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* @see eu.dnetlib.enabling.is.sn.SubscriptionDAO#addSubscription(java.lang.Object)
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*/
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@Override
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public void addSubscription(final ResourceStateSubscription subscription) {
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getById().put(subscription.getSubscriptionId(), subscription);
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final String key = subscription.getPrefix() + "/" + subscription.getType() + "/" + subscription.getResourceId();
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final Collection<ResourceStateSubscription> prefTypeList = getByPrefixAndType().get(key);
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if (prefTypeList == null)
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getByPrefixAndType().put(key, new ArrayList<ResourceStateSubscription>());
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getByPrefixAndType().get(key).add(subscription);
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}
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/**
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* {@inheritDoc}
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*
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* @see eu.dnetlib.enabling.is.sn.SubscriptionDAO#getSubscription(java.lang.String)
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*/
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@Override
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public ResourceStateSubscription getSubscription(final String subscriptionId) {
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return getById().get(subscriptionId);
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}
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/**
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* {@inheritDoc}
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*
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* @see eu.dnetlib.enabling.is.sn.SubscriptionDAO#listSubscriptions()
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*/
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@Override
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public Collection<ResourceStateSubscription> listSubscriptions() {
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return orDefault(getById().values());
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}
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/**
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* {@inheritDoc}
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*
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* @see eu.dnetlib.enabling.is.sn.SubscriptionDAO#listSubscriptions(java.lang.String)
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*/
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@Override
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public Collection<ResourceStateSubscription> listSubscriptions(final String prefix) {
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return listSubscriptions(prefix, "*", "*");
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}
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/**
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* {@inheritDoc}
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*
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* @see eu.dnetlib.enabling.is.sn.SubscriptionDAO#removeSubscription(java.lang.String)
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*/
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@Override
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public boolean removeSubscription(final String subscriptionId) {
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final ResourceStateSubscription subscription = getSubscription(subscriptionId);
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if (subscription == null)
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return false;
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final String key = subscription.getPrefix() + "/" + subscription.getType() + "/" + subscription.getResourceId();
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final Collection<ResourceStateSubscription> prefTypeList = getByPrefixAndType().get(key);
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prefTypeList.remove(subscription);
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getById().remove(subscriptionId);
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return true;
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}
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/**
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* inner helper method. returns an empty collection instead of a null.
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*
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* @param collection
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* some collection
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* @return input collection or empty collection
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*/
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private Collection<ResourceStateSubscription> orDefault(final Collection<ResourceStateSubscription> collection) {
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if (collection == null)
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return new ArrayList<ResourceStateSubscription>();
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return collection;
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}
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public Map<String, ResourceStateSubscription> getById() {
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return byId;
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}
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public void setById(final Map<String, ResourceStateSubscription> byId) {
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this.byId = byId;
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}
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public Map<String, Collection<ResourceStateSubscription>> getByPrefixAndType() {
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return byPrefixAndType;
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}
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public void setByPrefixAndType(final Map<String, Collection<ResourceStateSubscription>> byPrefixAndType) {
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this.byPrefixAndType = byPrefixAndType;
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}
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}
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