#format java
/**
* BuilderPattern Example
*/
import java.io.*;
abstract class Builder {
public abstract void makeTitle(String title);
public abstract void makeString(String str);
public abstract void makeItems(String[] items);
public abstract Object getResult();
}
class Director {
private Builder builder;
public Director(Builder builder) {
this.builder = builder;
}
public Object construct() {
builder.makeTitle("Greeting");
builder.makeString("In the morning and afternoon...");
builder.makeItems(new String[] {
"Good morning",
"Good afternoon",
});
builder.makeString("In the evening...");
builder.makeItems(new String[] {
"Hello",
"Good evening",
"Good nignt",
});
return builder.getResult();
}
}
class TextBuilder extends Builder {
private StringBuffer buffer = new StringBuffer();
public void makeTitle(String title) {
buffer.append("=====================\n");
buffer.append("["+title+"]");
buffer.append("\n");
}
public void makeString(String str) {
buffer.append(" * "+str+"\n");
buffer.append("\n");
}
public void makeItems(String[] items) {
for(int i=0; i < items.length; i++) {
buffer.append(" . "+items[i]+"\n");
}
buffer.append("\n");
}
public Object getResult() {
buffer.append("=======================\n");
return buffer.toString();
}
}
class HTMLBuilder extends Builder {
private String filename;
private PrintWriter writer;
public void makeTitle(String title) {
filename = title+".html";
try {
writer = new PrintWriter(new FileWriter(filename));
} catch(IOException e) {
e.printStackTrace();
}
writer.println(""+title+"");
writer.println(""+title+"
");
}
public void makeString(String str) {
writer.println(""+str+"
");
}
public void makeItems(String[] items) {
writer.println("");
for(int i=0; i < items.length; i++) {
writer.println("- "+items[i]+"
");
}
writer.println("
");
}
public Object getResult() {
writer.println("");
writer.close();
return filename;
}
}
public class BuilderDoc {
public static void main(String[] args) {
Director d1 = new Director(new TextBuilder());
String result = (String)d1.construct();
System.out.println(result);
Director d2 = new Director(new HTMLBuilder());
String filename = (String)d2.construct();
System.out.println(filename);
}
}