FlipAdapter.java

package com.aincc.libtest.activity.flip;

import java.lang.ref.WeakReference;
import java.util.List;

import android.content.Context;
import android.os.Parcelable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.aincc.libtest.activity.flip.internal.FlipItem;

/**
 * 
 * <h3><b>FlipAdapter</b></h3></br>
 * 
 * 플립 어댑터
 * 
 * @author aincc@barusoft.com
 * @version 1.0.0
 * @since 1.0.0
 */
public abstract class FlipAdapter
{
	public static final int POSITION_UNCHANGED = -1;
	public static final int POSITION_NONE = -2;

	/**
	 * 레이아웃 뷰
	 */
	private WeakReference<View> view;

	/**
	 * 옵저버
	 */
	private DataSetObserver observer;

	/**
	 * 컨텍스트
	 */
	protected Context context;

	/**
	 * 플립리스트 데이터
	 */
	protected List<? extends FlipItem> listdata;

	/**
	 * 생성자
	 * 
	 * @since 1.0.0
	 * @param context
	 * @param listdata
	 */
	public FlipAdapter(Context context, List<? extends FlipItem> listdata)
	{
		super();
		this.context = context;
		this.listdata = listdata;
	}

	/**
	 * @since 1.0.0
	 * @return 플립아이템 개수
	 */
	protected int getCount()
	{
		if (null != listdata)
		{
			return listdata.size();
		}
		return 0;
	}

	/**
	 * 해당 위치의 플립뷰 생성
	 * 
	 * @since 1.0.0
	 * @param container
	 * @param position
	 * @return 생성한 플립뷰
	 */
	public Object instantiateItem(ViewGroup container, int position)
	{
		FlipItem item = listdata.get(position);
		view = new WeakReference<View>(LayoutInflater.from(context).inflate(item.getLayout(), null));
		container.addView(view.get(), 0);
		return view.get();
	}

	/**
	 * 해당 위치의 플립뷰 삭제
	 * 
	 * @since 1.0.0
	 * @param container
	 * @param position
	 * @param object
	 */
	public void destroyItem(ViewGroup container, int position, Object object)
	{
		((FlipViewGroup) container).removeView((View) object);
		object = null;
	}

	/**
	 * 
	 * @since 1.0.0
	 * @param view
	 * @param obj
	 * @return boolean
	 */
	public boolean isViewFromObject(View view, Object obj)
	{
		return view == obj;
	}

	/**
	 * 업데이트 시작시 처리
	 * 
	 * @param container
	 */
	public void startUpdate(View container)
	{
	}

	/**
	 * @param container
	 *            The containing View from which the page will be removed.
	 * @param position
	 *            The page position that is now the primary.
	 * @param object
	 *            The same object that was returned by {@link #instantiateItem(View, int)}.
	 */
	public void setPrimaryItem(View container, int position, Object object)
	{
	}

	/**
	 * 업데이트 종료시 처리
	 * 
	 * @param container
	 */
	public void finishUpdate(View container)
	{
	}

	/**
	 * 상태 저장
	 * 
	 * @since 1.0.0
	 * @return
	 */
	public Parcelable saveState()
	{
		return null;
	}

	/**
	 * 상태 복구
	 * 
	 * @since 1.0.0
	 * @param state
	 * @param loader
	 */
	public void restoreState(Parcelable state, ClassLoader loader)
	{
	}

	/**
	 * @param object
	 * @return
	 */
	public int getItemPosition(Object object)
	{
		return POSITION_UNCHANGED;
	}

	/**
	 * 갱신처리
	 */
	public void notifyDataSetChanged()
	{
		if (null != observer)
		{
			observer.onDataSetChanged();
		}
	}

	/**
	 * 옵저버 등록
	 * 
	 * @since 1.0.0
	 * @param observer
	 */
	void setDataSetObserver(DataSetObserver observer)
	{
		this.observer = observer;
	}

	/**
	 * 
	 * <h3><b>DataSetObserver</b></h3></br>
	 * 
	 * @author aincc@barusoft.com
	 * @version 1.0.0
	 * @since 1.0.0
	 */
	interface DataSetObserver
	{
		public void onDataSetChanged();
	}

}