added intercepting filter and changes

intercepting-filter/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.iluwatar</groupId>
+	<artifactId>java-design-patterns</artifactId>
+	<version>1.0-SNAPSHOT</version>
+	<packaging>pom</packaging>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+	</properties>
+	<modules>
+		<module>abstract-factory</module>
+		<module>builder</module>
+		<module>factory-method</module>
+		<module>prototype</module>
+		<module>singleton</module>
+		<module>adapter</module>
+		<module>bridge</module>
+		<module>composite</module>
+		<module>decorator</module>
+		<module>facade</module>
+		<module>flyweight</module>
+		<module>proxy</module>
+		<module>chain</module>
+		<module>command</module>
+		<module>interpreter</module>
+		<module>iterator</module>
+		<module>mediator</module>
+		<module>memento</module>
+		<module>model-view-presenter</module>
+		<module>observer</module>
+		<module>state</module>
+		<module>strategy</module>
+		<module>template-method</module>
+		<module>visitor</module>
+		<module>double-checked-locking</module>
+		<module>servant</module>
+		<module>service-locator</module>
+		<module>null-object</module>
+		<module>event-aggregator</module>
+		<module>callback</module>
+		<module>execute-around</module>
+		<module>property</module>
+	</modules>
+
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>junit</groupId>
+				<artifactId>junit</artifactId>
+				<version>4.11</version>
+				<scope>test</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+	<build>
+		<plugins>
+			<!-- Tell maven to compile using Java 1.7 -->
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>3.0</version>
+				<configuration>
+					<source>1.7</source>
+					<target>1.7</target>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>
\ No newline at end of file

intercepting-filter/src/main/App.java

+ import java.util.*;
+import javax.swing.*;
+import javax.swing.table.*;
+import java.awt.*;
+import java.awt.event.*;
+public class App{
+	public static void main(String[] args){
+		FilterManager filterManager = new FilterManager(new Target());
+		filterManager.setFilter(new NameFilter());
+		filterManager.setFilter(new ContactFilter());
+		filterManager.setFilter(new AddressFilter());
+		filterManager.setFilter(new DepositFilter());
+		filterManager.setFilter(new OrderFilter());
+
+		Client client = new Client();
+		client.setFilterManager(filterManager);
+	}
+}
+
+interface Filter{
+	public String execute(String[] request);
+}
+
+class NameFilter implements Filter{
+	public String execute(String[] request){
+		if(request[0].equals("") || request[0].matches(".*[^\\w|\\s]+.*")){
+			return null;
+		}else return request[0];
+	}
+}
+
+class ContactFilter implements Filter{
+	public String execute(String[] request){
+		if(request[1].equals("") || request[1].matches(".*[^\\d]+.*") || request[1].length() != 11){
+			return null;
+		}else return request[1];
+	}
+}
+
+class AddressFilter implements Filter{
+	public String execute(String[] request){
+		if(request[2].equals("")){
+			return null;
+		}else return request[2];
+	}
+}
+
+class DepositFilter implements Filter{
+	public String execute(String[] request){
+		if(request[3].equals("")){
+			return null;
+		}else return request[3];
+	}
+}
+
+class OrderFilter implements Filter{
+	public String execute(String[] request){
+		if(request[4].equals("")){
+			return null;
+		}else return request[4];
+	}
+}
+
+class Target extends JFrame{
+	JTable jt;
+	JScrollPane jsp;
+	DefaultTableModel dtm;
+	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){
+		//System.out.println(request[4]);
+		dtm.addRow(new Object[]{request[0],request[1],request[2],request[3],request[4]});
+	}
+
+	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);
+			}
+		}
+	}
+}
+
+class FilterChain{
+	private ArrayList<Filter> filters = new ArrayList<Filter>();
+	private Target target;
+
+	public void addFilter(Filter filter){
+		filters.add(filter);
+	}
+
+	public String execute(String request){
+		String tempout[] = new String[filters.size()];
+
+		String tempin[] = request.split("&");
+		int i = 0;
+		try{
+			for(Filter filter:filters){
+				tempout[i] = null;
+				tempout[i++] = filter.execute(tempin);
+				//System.out.println(tempout[i]);
+			}
+		}catch(Exception e){
+			return "NOT ENOUGHT INPUT";
+		}
+		
+		if(tempout[4] == null){
+			return "INVALID ORDER!";
+		}else if(tempout[3] == null){
+			return "INVALID DEPOSIT NUMBER!";
+		}else if(tempout[2] == null){
+			return "INVALID ADRDESS!";
+		}else if(tempout[1] == null){
+			return "INVALID Contact Number!";
+		}else if(tempout[0] == null){
+			return "INVALID Name!";
+		}else{
+			target.execute(tempout);
+			return "RUNNING...";
+		}
+	}
+
+	public void setTarget(Target target){
+		this.target = target;
+	}
+}
+
+class FilterManager{
+	FilterChain filterChain;
+
+	public FilterManager(Target target){
+		filterChain = new FilterChain();
+		filterChain.setTarget(target);
+	}
+	public void setFilter(Filter filter){
+		filterChain.addFilter(filter);
+	}
+	public String filterRequest(String request){
+		return filterChain.execute(request);
+	}
+}
+
+class Client extends JFrame{
+	FilterManager filterManager;
+	JLabel jl;
+	JTextField[] jtfarr;
+	JTextArea[] jtaarr;
+	JButton[] buttarr;
+	public Client(){
+		super("Client System");
+		setDefaultCloseOperation(EXIT_ON_CLOSE);
+		setSize(300,300);
+		jl = new JLabel("RUNNING...");
+		jtfarr = new JTextField[3];
+		for(int i = 0; i < 3; i++){
+			jtfarr[i] = new JTextField();
+		}
+		jtaarr = new JTextArea[2];
+		for(int i = 0; i < 2; i++){
+			jtaarr[i] = new JTextArea();
+		}
+		buttarr = new JButton[2];
+		buttarr[0] = new JButton("Clear");
+		buttarr[1] = 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(jtfarr[0]);
+		panel.add(new JLabel("Contact Number"));
+		panel.add(jtfarr[1]);
+		panel.add(new JLabel("Address"));
+		panel.add(jtaarr[0]);
+		panel.add(new JLabel("Deposit Number"));
+		panel.add(jtfarr[2]);
+		panel.add(new JLabel("Order"));
+		panel.add(jtaarr[1]);
+		panel.add(buttarr[0]);
+		panel.add(buttarr[1]);
+
+		buttarr[0].addActionListener(new ActionListener(){
+			@Override
+			public void actionPerformed(ActionEvent e){
+				for(JTextArea i : jtaarr){
+					i.setText("");
+				}
+				for(JTextField i : jtfarr){
+					i.setText("");
+				}
+			}
+		});
+
+		buttarr[1].addActionListener(new ActionListener(){
+			@Override
+			public void actionPerformed(ActionEvent e){
+				jl.setText(sendRequest(jtfarr[0].getText()+"&"+jtfarr[1].getText()+"&"+jtaarr[0].getText()+"&"+jtfarr[2].getText()+"&"+jtaarr[1].getText()));
+			}
+		});
+
+		JRootPane rootPane = SwingUtilities.getRootPane(buttarr[1]); 
+		rootPane.setDefaultButton(buttarr[1]);
+		setVisible(true);
+	} 
+	public void setFilterManager(FilterManager filterManager){
+		this.filterManager = filterManager;
+	}
+	public String sendRequest(String request){
+		return filterManager.filterRequest(request);
+	}
+}
\ No newline at end of file