dynamicbindgridbean.java

来自「OperaMasks是一种基于J2EE的Web开发技术」· Java 代码 · 共 114 行

/*
 * $Id: DynamicBindGridBean.java,v 1.4 2008/08/15 03:02:02 libin Exp $
 *
 * Copyright (C) 2006 Operamasks Community.
 * Copyright (C) 2000-2006 Apusic Systems, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see http://www.gnu.org/licenses.
 */
package demo.grid.dynamic;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.operamasks.faces.annotation.Action;
import org.operamasks.faces.annotation.BeforeRender;
import org.operamasks.faces.annotation.Bind;
import org.operamasks.faces.annotation.ComponentAttributes;
import org.operamasks.faces.annotation.ManagedBean;
import org.operamasks.faces.annotation.ManagedBeanScope;
import org.operamasks.faces.component.grid.CheckboxSelectionModel;
import org.operamasks.faces.component.grid.GridColumn;
import org.operamasks.faces.component.grid.GridColumnModel;
import org.operamasks.faces.component.grid.GridHeaderModel;
import org.operamasks.faces.component.grid.GridSelectionModel;
import org.operamasks.faces.component.grid.impl.UIDataGrid;
import org.operamasks.faces.component.grid.provider.GridRowDataProvider;
import org.operamasks.faces.component.grid.provider.GridViewProvider;
import org.operamasks.faces.util.ArrayUtils;

import demo.StockBean.Quote;
import demo.grid.GridBeanHelper;
import demo.grid.GridDataModel.TrainRecord;

@ManagedBean(scope = ManagedBeanScope.SESSION)
@SuppressWarnings( { "unused", "serial" })
public class DynamicBindGridBean {
	public DynamicBindGridBean() {
		Map<String, Object> config = new HashMap<String, Object>();
		config.put("paged", Boolean.TRUE);
		config.put("rows", new Integer(5));
		this.gridConfig = config;
	}

	@SuppressWarnings("unchecked")
	@Bind(id = "grid", attribute = "value")
	private List data = GridBeanHelper.trainRecord;

	@ComponentAttributes(id = "grid")
	private Map<String, Object> gridConfig;

	@Bind(id = "grid", attribute = "viewProvider")
	private GridViewProvider provider = GridBeanHelper.getTrainViewProvider();

	@Bind(id = "grid", attribute = "rowDataProvider")
	private GridRowDataProvider rowProvider = GridBeanHelper
			.getTrainRowProvider();

	@Bind(id = "grid")
	private UIDataGrid grid;

	@BeforeRender
	public void beforeRender(boolean isPostBack) {
		if (!isPostBack) {
			this.data = GridBeanHelper.trainRecord;
		}
	}

	/**
	 * 使用页面绑定或者IoVC绑定方式为grid绑定的value，在grid中持有的只是ValueExpression对象，在运行时才求值；
	 * 直接调用grid.setValue会将实际的value设置到grid中，从而导致value被序列化以保持状态。
	 * 推荐的做法是更改grid所绑定的value的值，或者为grid设置dataProvider。
	 */
	@SuppressWarnings("unchecked")
	@Action
	public void train() {
		grid.setViewProvider(GridBeanHelper.getTrainViewProvider());
		grid.setRowDataProvider(GridBeanHelper.getTrainRowProvider());
		this.data = GridBeanHelper.trainRecord;
		grid.setFirst(0);
		grid.setRows(4);
		grid.rebind();
	}

	/**
	 * 使用页面绑定或者IoVC绑定方式为grid绑定的value，在grid中持有的只是ValueExpression对象，在运行时才求值；
	 * 直接调用grid.setValue会将实际的value设置到grid中，从而导致value被序列化以保持状态。
	 * 推荐的做法是更改grid所绑定的value的值，或者为grid设置dataProvider。
	 */
	@Action
	public void stock() {
		grid.setViewProvider(GridBeanHelper.getSingleHeaderStockViewProvider());
		grid.setRowDataProvider(GridBeanHelper.getStockRowProvider());
		this.data = Arrays.asList(GridBeanHelper.stockData);
		grid.setFirst(0);
		grid.setRows(10);
		grid.rebind();
	}
}