PagedCursorAdapter.java

/* 
 * Copyright (C) 2008 Torgny Bjers
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.xorcode.andtweet.data;

import java.util.Arrays;

import com.xorcode.andtweet.AndTweetService;

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

/**
 * @author torgny.bjers
 *
 */
public class PagedCursorAdapter extends SimpleCursorAdapter implements FilterQueryProvider {

    private static final String TAG = PagedCursorAdapter.class.getSimpleName();

	private ContentResolver mContentResolver;
	private String[] mProjection;
	private Uri mUri;
	private String mSortOrder;

	/**
	 * 
	 * @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 (Log.isLoggable(AndTweetService.APPTAG, Log.VERBOSE)) {
		    Log.v(TAG, "runQuery, mUri=" + mUri + "; mProjection=" + Arrays.toString(mProjection) + "; mSortOrder=" + mSortOrder + ";");
		}
		return mContentResolver.query(mUri, mProjection, null, null, mSortOrder);
	}
}