java设计模式进阶_intercepting-filter

//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : Filter.java//  @ Date : 2016/9/5//  @ Author : /////** * Filter interface Filters perform certain tasks prior or after execution of * request by request handler.In this case,before the request is handled by * the target,the request undergoes through each Filter * */public interface Filter {    /**     * Execute order processing filter.     * @param order      * @return empty string on success,otherwise error message.     */    public String execute(Order order);    /**     * Set next filter in chain after this.     * @param filter     */    public void setNext(Filter filter);    /**     * Get next filter in chain after this.     * @return     */    public Filter getNext();    /**     * Get last filter in the chain.     * @return     */    public Filter getLast();}//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : AbstractFilter.java//  @ Date : 2016/9/5//  @ Author : /////** * Base class for order processing filters. * Handles chain management. * */public abstract class AbstractFilter implements Filter {    private Filter next;    public AbstractFilter() {}    public AbstractFilter(Filter next) {        this.next = next;    }    public Filter getNext(){        return next;    }    public void setNext(Filter next){        this.next = next;    }    public Filter getLast(){        Filter last = this;        while(last.getNext() != null)        {            last = last.getNext();        }        return last;    }    @Override    public String execute(Order order) {        if(getNext() != null)            return getNext().execute(order);        else            return "";    }}//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : ContactFilter.java//  @ Date : 2016/9/5//  @ Author : /////** * Concrete implementation of filter * This filter checks for the contact field in which it checks of the input consist of numbers * and it also checks if the input follows the length constraint (11 digits) * */public class ContactFilter extends AbstractFilter {    public String execute(Order order) {        String result = super.execute(order);        if(order.getContactNumber() == null             || order.getContactNumber().isEmpty()            || order.getContactNumber().matches(".*[^\\d]+.*")            || order.getContactNumber().length() != 11){            return result + "Invalid contact number! ";        } else {            return result;        }    }}//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : DepositFilter.java//  @ Date : 2016/9/5//  @ Author : /////** * Concrete implementation of filter * This checks for the deposit code * */public class DepositFilter extends AbstractFilter {    public String execute(Order order) {        String result = super.execute(order);        if(order.getDepositNumber() == null || order.getDepositNumber().isEmpty())        {            return result + "Invalid deposit number! ";        } else {            return result;        }    }}//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : OrderFilter.java//  @ Date : 2016/9/5//  @ Author : /////** * Concrete implementation of filter This checks for the order field */public class OrderFilter extends AbstractFilter {    public String execute(Order order) {        String result = super.execute(order);        if(order.getOrder() == null || order.getOrder().isEmpty())        {            return result + "Invalid order! ";        } else {            return result;        }    }}//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : AddressFilter.java//  @ Date : 2016/9/5//  @ Author : /////** * Concrete implementation of filter * This filter is responsible for checking/filtering the input in the address field. * */public class AddressFilter extends AbstractFilter {    public String execute(Order order) {        String result = super.execute(order);        if(order.getAddress() == null || order.getAddress().isEmpty())        {            return result + "Invalid address! ";        } else {            return null;        }    }}//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : NameFilter.java//  @ Date : 2016/9/5//  @ Author : /////** * Concrete implementation of filter This filter checks if the input in the Name * field is valid.(alphanumeric) * */public class NameFilter extends AbstractFilter {    public String execute(Order order) {        String result = super.execute(order);        if(order.getName() == null || order.getName().isEmpty() || order.getName().matches(".*[^\\w|\\s]+.*"))        {            return result + "Invalid order!";        } else {            return result;        }    }}//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : Order.java//  @ Date : 2016/9/5//  @ Author : ////public class Order {    private String name;    private String contactNumber;    private String address;    private String depositNumber;    private String order;    public Order() {}    public Order(String name, String contactNumber, String address, String depositNumber, String order) {        this.name = name;        this.contactNumber = contactNumber;        this.address = address;        this.depositNumber = depositNumber;        this.order = order;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getContactNumber() {        return contactNumber;    }    public void setContactNumber(String contactNumber) {        this.contactNumber = contactNumber;    }    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;    }    public String getDepositNumber() {        return depositNumber;    }    public void setDepositNumber(String depositNumber) {        this.depositNumber = depositNumber;    }    public String getOrder() {        return order;    }    public void setOrder(String order) {        this.order = order;    }}//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : FilterChain.java//  @ Date : 2016/9/5//  @ Author : ////public class FilterChain {    private Filter chain;    private final Target target;    public FilterChain(Target target) {        this.target = target;    }    public void addFilter(Filter filter) {        if(chain == null)            chain = filter;        else            chain.getLast().setNext(filter);    }    public String execute(Order order) {        if(chain != null){            return chain.execute(order);        } else             return "RUNNING...";    }}//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : FilterManager.java//  @ Date : 2016/9/5//  @ Author : ////public class FilterManager {    private FilterChain filterChain;    public FilterManager(Target target) {        filterChain = new FilterChain(target);    }    public void addFilter(Filter filter) {        filterChain.addFilter(filter);    }    public String filterRequest(Order order) {        return filterChain.execute(order);    }}import java.awt.BorderLayout;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JRootPane;import javax.swing.JTextArea;import javax.swing.JTextField;import javax.swing.SwingUtilities;//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : Client.java//  @ Date : 2016/9/5//  @ Author : ////public class Client extends JFrame {    /**     *      */    private static final long serialVersionUID = 5940738358347108291L;    private FilterManager filterManager;    private JLabel jl;    private JTextField[] jtFields;    private JTextArea[] jtAreas;    private JButton clearButton;    private JButton processButton;    public Client() {        super("Client System");        setDefaultCloseOperation(EXIT_ON_CLOSE);        setSize(300, 300);        jl = new JLabel("RUNNING...");        jtFields = new JTextField[3];        for (int i = 0; i < 3; i++) {            jtFields[i] = new JTextField();        }        jtAreas = new JTextArea[2];        for (int i = 0; i < 2; i++) {            jtAreas[i] = new JTextArea();        }        clearButton = new JButton("Clear");        processButton = new JButton("Process");        setup();    }    private void setup() {        setLayout(new BorderLayout());        JPanel panel = new JPanel();        add(jl, BorderLayout.SOUTH);        add(panel, BorderLayout.CENTER);        panel.setLayout(new GridLayout(6, 2));        panel.add(new JLabel("Name"));        panel.add(jtFields[0]);        panel.add(new JLabel("Contact Number"));        panel.add(jtFields[1]);        panel.add(new JLabel("Address"));        panel.add(jtAreas[0]);        panel.add(new JLabel("Deposit Number"));        panel.add(jtFields[2]);        panel.add(new JLabel("Order"));        panel.add(jtAreas[1]);        panel.add(clearButton);        panel.add(processButton);        clearButton.addActionListener(new ActionListener() {            @Override            public void actionPerformed(ActionEvent e) {                for (JTextArea i : jtAreas) {                    i.setText("");                }                for (JTextField i : jtFields) {                    i.setText("");                }            }        });        processButton.addActionListener(new ActionListener() {            @Override            public void actionPerformed(ActionEvent e) {                Order order = new Order(jtFields[0].getText(), jtFields[1]                        .getText(), jtAreas[0].getText(),                        jtFields[2].getText(), jtAreas[1].getText());                jl.setText(sendRequest(order));            }        });        JRootPane rootPane = SwingUtilities.getRootPane(processButton);        rootPane.setDefaultButton(processButton);        setVisible(true);    }    public void setFilterManager(FilterManager filterManager) {        this.filterManager = filterManager;    }    public String sendRequest(Order order) {        return filterManager.filterRequest(order);    }}import java.awt.BorderLayout;import java.awt.Dimension;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JRootPane;import javax.swing.JScrollPane;import javax.swing.JTable;import javax.swing.SwingUtilities;import javax.swing.table.DefaultTableModel;//////  Generated by StarUML(tm) Java Add-In////  @ Project : Untitled//  @ File Name : Target.java//  @ Date : 2016/9/5//  @ Author : ////public class Target extends JFrame {    private static final long serialVersionUID = 1404005204378123519L;    private JTable jt;    private JScrollPane jsp;    private DefaultTableModel dtm;    private JButton del;    public Target(){        super("Order System");        setDefaultCloseOperation(EXIT_ON_CLOSE);        setSize(640,480);        dtm = new DefaultTableModel(new Object[]{"Name", "Contact Number",                "Address", "Deposit Number", "Order"},0);        jt = new JTable(dtm);        del = new JButton("Delete");        setup();    }    private void setup() {        setLayout(new BorderLayout());        JPanel bot = new JPanel();        add(jt.getTableHeader(),BorderLayout.NORTH);        bot.setLayout(new BorderLayout());        bot.add(del,BorderLayout.EAST);        add(bot,BorderLayout.SOUTH);        jsp = new JScrollPane(jt);        jsp.setPreferredSize(new Dimension(500,250));;        add(jsp,BorderLayout.CENTER);        del.addActionListener(new DListener());        JRootPane rootPane = SwingUtilities.getRootPane(del);        rootPane.setDefaultButton(del);        setVisible(true);    }    public void execute(String[] request) {        dtm.addRow(new Object[]{                request[0],request[1],request[2],request[3],request[4]        });    }    private class DListener implements ActionListener    {        @Override        public void actionPerformed(ActionEvent e) {            int temp = jt.getSelectedRow();            if(temp == -1)                return ;            int temp2 = jt.getSelectedRowCount();            for(int i = 0;i < temp2; i++)            {                dtm.removeRow(temp);            }        }    }}/** * This is an app that checks whether the order request is valid through pre-processing done via Filters * Each field has its own corresponding Filter * */public class App {    public static void main(String[] args) {        FilterManager filterManager = new FilterManager(new Target());        filterManager.addFilter(new NameFilter());        filterManager.addFilter(new ContactFilter());        filterManager.addFilter(new AddressFilter());        filterManager.addFilter(new DepositFilter());        filterManager.addFilter(new OrderFilter());        Client client = new Client();        client.setFilterManager(filterManager);    }}