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/*
 * Copyright (C) 2016 Singular Studios (a.k.a Atom Tecnologia) - www.opensingular.com
 *
 * 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 org.opensingular.lib.wicket.util.datatable;

import java.io.Serializable;
import java.util.Iterator;
import java.util.List;

import org.apache.wicket.extensions.markup.html.repeater.data.sort.SortOrder;
import org.apache.wicket.extensions.markup.html.repeater.util.SortParam;
import org.apache.wicket.extensions.markup.html.repeater.util.SortableDataProvider;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;

public abstract class BaseTreeDataProvider extends SortableDataProvider {

    public BaseTreeDataProvider() {}
    public BaseTreeDataProvider(S defaultSort) {
        super.setSort(defaultSort, SortOrder.ASCENDING);
    }

    public abstract List list(int first, int count, S sortProperty, boolean ascending);

    public BaseTreeDataProvider setSortAsc(S property) {
        super.setSort(property, SortOrder.ASCENDING);
        return this;
    }
    public BaseTreeDataProvider setSortDesc(S property) {
        super.setSort(property, SortOrder.DESCENDING);
        return this;
    }

    @Override
    public Iterator iterator(long first, long count) {
        SortParam sort = getSort();
        return list((int) first, (int) count,
            (sort == null) ? null : sort.getProperty(),
            (sort == null) ? true : sort.isAscending())
            .iterator();
    }

    @Override
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public IModel model(T object) {

//        if (object instanceof IEntity && ((IEntity) object).getId() != null) {
//            return new EntityModel((IEntity) object);
//        } else //
        if (object instanceof Serializable) {
            return new Model((Serializable) object);
        }

        throw new IllegalArgumentException("Model do objeto não pode ser resolvido: " + object);
    }

}