Portal example

Portal.java

package com.blueapron.service.cache;

import com.blueapron.service.models.NetworkModel;
import com.blueapron.service.models.network.JsonModelConverter;

import java.io.Closeable;
import java.util.Collection;
import java.util.List;

import io.realm.Realm;
import io.realm.RealmModel;
import io.realm.RealmQuery;

/**
 * Helper class to wrap a Realm object. This allows us to mock methods of the Realm to stub out
 * functionality as necessary.
 */
public class Portal implements Closeable {

    private final Realm mRealm;

    public Portal(Realm realm) {
        mRealm = realm;
    }

    public void beginTransaction() {
        mRealm.beginTransaction();
    }

    public void commitTransaction() {
        mRealm.commitTransaction();
    }

    public <T extends RealmModel> PortalQuery<T> where(Class<T> clazz) {
        return new PortalQuery<T>(mRealm.where(clazz));
    }

    public void insertOrUpdate(RealmModel object) {
        mRealm.insertOrUpdate(object);
    }
  
    public void insertOrUpdate(Collection<? extends RealmModel> objects) {
        mRealm.insertOrUpdate(objects);
    }

    public <T extends RealmModel> T copyOrUpdate(T object) {
        return mRealm.copyToRealmOrUpdate(object);
    }

    @Override
    public void close() {
        mRealm.close();
    }

    public static class PortalQuery<T extends RealmModel> {
        private final RealmQuery<T> mQuery;

        PortalQuery(RealmQuery<T> query) {
            mQuery = query;
        }

        public PortalQuery<T> equalTo(String key, String value) {
            mQuery.equalTo(key, value);
            return this;
        }

        public PortalQuery<T> equalTo(String key, boolean value) {
            mQuery.equalTo(key, value);
            return this;
        }

        public PortalQuery<T> equalTo(String key, int value) {
            mQuery.equalTo(key, value);
            return this;
        }

        public PortalQuery<T> in(String key, String[] values) {
            mQuery.in(key, values);
            return this;
        }

        public T findFirst() {
            return mQuery.findFirst();
        }
      
        public void findAndDeleteAll() {
            mQuery.findAll().deleteAllFromRealm();
        }

        // TODO - these should really return RealmResults, but using List makes it mockable.
        public List<T> findAll() {
            return mQuery.findAll();
        }

        public List<T> findAllSorted(String fieldName) {
            return mQuery.findAllSorted(fieldName);
        }
    }
}