    001// Copyright 2007, 2008 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007//     http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.grid;
    016
    017import org.apache.tapestry5.beanmodel.BeanModel;
    018
    019/**
    020 * A provider of model data to the sub-components of the {@link org.apache.tapestry5.corelib.components.Grid} component.
    021 * The primary implementor of this component is the Grid component itself. This is effectively a way to package three
    022 * values as a single parameter to components such as {@link org.apache.tapestry5.corelib.components.GridColumns} and
    023 * {@link org.apache.tapestry5.corelib.components.GridRows}.
    024 */
    025public interface GridModel
    026{
    027    /**
    028     * Returns the data model, which defines the columns (in terms of properties of the row type), and provides access
    029     * to actual values for a given row instance.
    030     */
    031    BeanModel getDataModel();
    032
    033    /**
    034     * Returns the source for the data to be presented in the Grid.
    035     */
    036    GridDataSource getDataSource();
    037
    038    /**
    039     * Returns the object used to track sorting behavior of the Grid.
    040     */
    041    GridSortModel getSortModel();
    042}