resultsetbean.java

一个比较好的jsf spring hibernate的例子

/*
 * $Id: ResultSetBean.java,v 1.6 2007/04/27 22:00:25 ofung Exp $
 */

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 * 
 * Contributor(s):
 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package demo.model;

import javax.faces.component.UIComponent;
import javax.faces.component.UIData;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;


/** <p>Backing file bean for <code>ResultSet</code> demo.</p> */

public class ResultSetBean {

    private static Logger LOGGER = Logger.getLogger("demo.model");
    
    private List<CustomerBean> list = null;


    public ResultSetBean() {
    }


    public List<CustomerBean> getList() {
        // Construct a preconfigured customer list lazily.
        if (list == null) {
            list = new ArrayList<CustomerBean>();
            for (int i = 0; i < 1000; i++) {
                list.add(new CustomerBean(Integer.toString(i),
                                          "name_" + Integer.toString(i),
                                          "symbol_" + Integer.toString(i), i));
            }
        }
        return list;
    }


    public void setList(List<CustomerBean> newlist) {
        this.list = newlist;
    }

    // -------------------------------------------------------- Bound Components

    /** <p>The <code>UIData</code> component representing the entire table.</p> */
    private UIData data = null;


    public UIData getData() {
        return data;
    }


    public void setData(UIData data) {
        this.data = data;
    }

    // ---------------------------------------------------------- Action Methods


    /** <p>Scroll directly to the first page.</p> */
    public String first() {
        scroll(0);
        return (null);

    }


    /** <p>Scroll directly to the last page.</p> */
    public String last() {
        scroll(data.getRowCount() - 1);
        return (null);

    }


    /** <p>Scroll forwards to the next page.</p> */
    public String next() {
        int first = data.getFirst();
        scroll(first + data.getRows());
        return (null);

    }


    /** <p>Scroll backwards to the previous page.</p> */
    public String previous() {
        int first = data.getFirst();
        scroll(first - data.getRows());
        return (null);

    }


    /**
     * <p>Scroll to the page that contains the specified row number.</p>
     *
     * @param row Desired row number
     */
    public void scroll(int row) {

        int rows = data.getRows();
        if (rows < 1) {
            return; // Showing entire table already
        }
        if (row < 0) {
            data.setFirst(0);
        } else if (row >= data.getRowCount()) {
            data.setFirst(data.getRowCount() - 1);
        } else {
            data.setFirst(row - (row % rows));
        }

    }


    /**
     * Handles the ActionEvent generated as a result of clicking on a
     * link that points a particular page in the result-set.
     */
    public void processScrollEvent(ActionEvent event) {
        int currentRow = 1;
        if (LOGGER.isLoggable(Level.FINE)) {
            LOGGER.fine("TRACE: ResultSetBean.processScrollEvent ");
        }
        FacesContext context = FacesContext.getCurrentInstance();
        UIComponent component = event.getComponent();
        Integer curRow = (Integer) component.getAttributes().get("currentRow");
        if (curRow != null) {
            currentRow = curRow.intValue();
        }
        // scroll to the appropriate page in the ResultSet.
        scroll(currentRow);
    }


}