Android适配器之DataModifyHelper数据操作类的封装

/**
 * @Description:
 * @author: Xiaoxuan948
 * @date: 2016/7/20 20:39
 */
public interface INotifyAdapterDataSetChange {
    /**
     * 通知适配器更新
     */
    void notifyUnityAdapterDataChange();

    void notifyUnityAdapterDataInsert(int position);

    void notifyUnityAdapterDataUpdate(int position);

    void notifyUnityAdapterDataRemove(int position);
}

public abstract class AbsDataModifyHelper<T> implements IAdapterDataModifyHelper<T> {
    private final UtilsLog lg = UtilsLog.getLogger(AbsDataModifyHelper.class);
    protected List<T> mDataResources;
    protected INotifyAdapterDataSetChange INotifyDataSetChange;

    public AbsDataModifyHelper() {
        this.mDataResources = new ArrayList<>();
    }

    @Override
    public final void setNotifyAdapterDataSetChange(INotifyAdapterDataSetChange INotifyDataSetChange) {
        this.INotifyDataSetChange = INotifyDataSetChange;
    }

    @Override
    public final List<T> getDataResources() {
        return mDataResources;
    }
    //省略部分代码
}

/**
 * @Description:
 * @author: Xiaoxuan948
 * @date: 2016/8/26 10:04
 */
public class DataModifyHelper<T> extends AbsDataModifyHelper<T> {
    private final UtilsLog lg = UtilsLog.getLogger(DataModifyHelper.class);

    @Override
    public void setDataResource(List<? extends T> setDataResources) {
        /*针对集合空数据进行处理*/
        if (UtilsCollections.isCollectionNotEmpty(setDataResources) && setDataResources.contains(null)) {
            lg.e("setDataResource集合包含null数据");
            setDataResources = Lists.newArrayList(Collections2.filter(setDataResources, new Predicate<T>() {
                @Override
                public boolean apply(T input) {
                    return input != null;
                }
            }));
        }
        if (!UtilsCollections.isCollectionNotEmpty(setDataResources)) {
            return;
        }
        /*针对类型不匹配进行处理*/
        this.mDataResources = Lists.transform(setDataResources, new Function<Object, T>() {
            @Override
            public T apply(Object input) {
                return (T) input;
            }
        });
        INotifyDataSetChange.notifyUnityAdapterDataChange();
    }

    @Override
    public void addDataResource(int location, List<? extends T> addDataResources) {
        if (UtilsCollections.isCollectionNotEmpty(addDataResources) && addDataResources.contains(null)) {
            lg.e("addDataResource集合包含null数据");
            addDataResources = Lists.newArrayList(Collections2.filter(addDataResources, new Predicate<T>() {
                @Override
                public boolean apply(T input) {
                    return input != null;
                }
            }));
        }
        if (!UtilsCollections.isCollectionNotEmpty(addDataResources)) {
            lg.e("addDataResource:待加入的集合为空");
            return;
        }
        location = proofOperateDataLocation(location);
        this.mDataResources.addAll(location, addDataResources);
        INotifyDataSetChange.notifyUnityAdapterDataInsert(location);
    }

    @Override
    public void reviseDataResource(int position, T enity) {
        if (isOperateLocationRight(position)) {
            this.mDataResources.set(position, enity);
            INotifyDataSetChange.notifyUnityAdapterDataUpdate(position);
        } else {
            lg.e("reviseDataResource failed because position out of size " + this.mDataResources.size());
        }
    }

    @Override
    public void removeDataResourceOnPosition(int position) {
        this.mDataResources.remove(position);
        INotifyDataSetChange.notifyUnityAdapterDataRemove(position);
    }

    @Override
    public void clear() {
        this.mDataResources.clear();
        INotifyDataSetChange.notifyUnityAdapterDataChange();
    }
}