OListAdapter.java

/**
 * Odoo, Open Source Management Solution
 * Copyright (C) 2012-today Odoo SA (<http:www.odoo.com>)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http:www.gnu.org/licenses/>
 *
 * Created on 7/1/15 6:07 PM
 */
package com.odoo.core.support.list;

import android.content.Context;
import android.text.TextUtils;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.Filter;

import java.util.ArrayList;
import java.util.List;

public class OListAdapter extends ArrayAdapter<Object> {
    public static final String TAG = OListAdapter.class.getSimpleName();

    private Context mContext = null;
    private List<Object> mObjects = null;
    private List<Object> mAllObjects = null;
    private RowFilter mFilter = null;
    private int mResourceId = 0;
    private RowFilterTextListener mRowFilterTextListener = null;
    private OnSearchChange mOnSearchChange = null;

    public OListAdapter(Context context, int resource, List<Object> objects) {
        super(context, resource, objects);
        Log.d(TAG, "OListAdapter->constructor()");
        mContext = context;
        mObjects = new ArrayList<>(objects);
        mAllObjects = new ArrayList<>(objects);
        mResourceId = resource;
    }

    @Override
    public Filter getFilter() {
        if (mFilter == null) {
            mFilter = new RowFilter();
        }
        return mFilter;
    }

    public int getResource() {
        return mResourceId;
    }

    public void replaceObjectAtPosition(int position, Object object) {
        mAllObjects.remove(position);
        mAllObjects.add(position, object);
        mObjects.remove(position);
        mObjects.add(position, object);
    }

    public void notifiyDataChange(List<Object> objects) {
        Log.d(TAG, "OListAdapter->notifiyDataChange()");
        mAllObjects.clear();
        mObjects.clear();
        mAllObjects.addAll(objects);
        mObjects.addAll(objects);
        notifyDataSetChanged();
    }

    class RowFilter extends Filter {

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults result = new FilterResults();
            if (!TextUtils.isEmpty(constraint)) {
                String searchingStr = constraint.toString().toLowerCase();
                List<Object> filteredItems = new ArrayList<Object>();
                for (Object item : mAllObjects) {
                    String filterText = "";
                    if (mRowFilterTextListener != null) {
                        filterText = mRowFilterTextListener.filterCompareWith(
                                item).toLowerCase();
                    } else {
                        filterText = item.toString().toLowerCase();
                    }
                    if (filterText.contains(searchingStr)) {
                        filteredItems.add(item);
                    }
                }
                result.count = filteredItems.size();
                result.values = filteredItems;

            } else {
                synchronized (this) {
                    result.count = mAllObjects.size();
                    result.values = mAllObjects;
                }
            }
            return result;
        }

        @SuppressWarnings("unchecked")
        @Override
        protected void publishResults(CharSequence constraint,
                                      FilterResults results) {
            clear();
            mObjects = (List<Object>) results.values;
            addAll(mObjects);
            notifyDataSetChanged();
            if (mOnSearchChange != null) {
                mOnSearchChange.onSearchChange(mObjects);
            }
        }
    }

    public void setOnSearchChange(OnSearchChange callback) {
        mOnSearchChange = callback;
    }

    public void setRowFilterTextListener(RowFilterTextListener listener) {
        mRowFilterTextListener = listener;
    }

    public interface RowFilterTextListener {

        public String filterCompareWith(Object object);
    }

    public interface OnSearchChange {

        public void onSearchChange(List<Object> newRecords);
    }

}