PagedCursorAdapter.java

/** 
 ** Copyright (c) 2010 Ushahidi Inc
 ** All rights reserved
 ** Contact: team@ushahidi.com
 ** Website: http://www.ushahidi.com
 ** 
 ** GNU Lesser General Public License Usage
 ** This file may be used under the terms of the GNU Lesser
 ** General Public License version 3 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL included in the
 ** packaging of this file. Please review the following information to
 ** ensure the GNU Lesser General Public License version 3 requirements
 ** will be met: http://www.gnu.org/licenses/lgpl.html.	
 **	
 **
 ** If you have questions regarding the use of this file, please contact
 ** Ushahidi developers at team@ushahidi.com.
 ** 
 **/

package com.ushahidi.android.app.data;

import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FilterQueryProvider;
import android.widget.SimpleCursorAdapter;

public class PagedCursorAdapter extends SimpleCursorAdapter implements FilterQueryProvider {

    private ContentResolver mContentResolver;

    private String[] mProjection;

    private Uri mUri;

    private String mSortOrder;

    private Cursor mCursor;

    // private LayoutInflater mInflater;

    /**
     * @param context
     * @param layout
     * @param c
     * @param from
     * @param to
     */
    public PagedCursorAdapter(Context context, int layout, Cursor c, String[] from, int[] to,
            Uri uri, String[] projection, String sortOrder) {
        super(context, layout, c, from, to);
        mContentResolver = context.getContentResolver();
        mProjection = projection;
        mUri = uri;
        mSortOrder = sortOrder;
        setFilterQueryProvider(this);
        // mInflater = LayoutInflater.from(context);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        return super.getView(position, convertView, parent);
    }

    public Cursor runQuery(CharSequence constraint) {
        if (constraint != null) {
            if (mSortOrder.indexOf("LIMIT 0,") > 0) {
                String newSortOrder = mSortOrder.substring(0, mSortOrder.indexOf("LIMIT 0,"));
                mSortOrder = newSortOrder;
            }
            mSortOrder += " " + constraint.toString().trim();
        }
        if (mCursor != null && !mCursor.isClosed())
            mCursor.close();
        return mContentResolver.query(mUri, mProjection, null, null, mSortOrder);
    }
}