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Reformat business-delegate, callback, chain, command, composite, dao, decorator & dependency-injection patterns.

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This commit is contained in:
Ankur Kaushal
2015-11-01 18:48:43 -05:00
parent 3af06a3a3a
commit 449340bd2b
54 changed files with 698 additions and 700 deletions
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41
composite/src/main/java/com/iluwatar/composite/App.java
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@ -1,33 +1,34 @@
package com.iluwatar.composite;
/**
* The Composite pattern is a partitioning design pattern. The Composite pattern
* describes that a group of objects is to be treated in the same way as a single
* instance of an object. The intent of a composite is to "compose" objects into
* tree structures to represent part-whole hierarchies. Implementing the Composite
* pattern lets clients treat individual objects and compositions uniformly.
* The Composite pattern is a partitioning design pattern. The Composite pattern describes that a
* group of objects is to be treated in the same way as a single instance of an object. The intent
* of a composite is to "compose" objects into tree structures to represent part-whole hierarchies.
* Implementing the Composite pattern lets clients treat individual objects and compositions
* uniformly.
* <p>
* In this example we have sentences composed of words composed of letters. All of
* the objects can be treated through the same interface ({@link LetterComposite}).
* In this example we have sentences composed of words composed of letters. All of the objects can
* be treated through the same interface ({@link LetterComposite}).
*
*/
public class App {
/**
* Program entry point
* @param args command line args
*/
public static void main(String[] args) {
System.out.println("Message from the orcs: ");
/**
* Program entry point
*
* @param args command line args
*/
public static void main(String[] args) {
System.out.println("Message from the orcs: ");
LetterComposite orcMessage = new Messenger().messageFromOrcs();
orcMessage.print();
LetterComposite orcMessage = new Messenger().messageFromOrcs();
orcMessage.print();
System.out.println("\n");
System.out.println("\n");
System.out.println("Message from the elves: ");
System.out.println("Message from the elves: ");
LetterComposite elfMessage = new Messenger().messageFromElves();
elfMessage.print();
}
LetterComposite elfMessage = new Messenger().messageFromElves();
elfMessage.print();
}
}

25
composite/src/main/java/com/iluwatar/composite/Letter.java
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@ -7,20 +7,19 @@ package com.iluwatar.composite;
*/
public class Letter extends LetterComposite {
private char c;
private char c;
public Letter(char c) {
this.c = c;
}
public Letter(char c) {
this.c = c;
}
@Override
protected void printThisBefore() {
System.out.print(c);
}
@Override
protected void printThisAfter() {
// nop
}
@Override
protected void printThisBefore() {
System.out.print(c);
}
@Override
protected void printThisAfter() {
// nop
}
}

32
composite/src/main/java/com/iluwatar/composite/LetterComposite.java
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@ -10,25 +10,25 @@ import java.util.List;
*/
public abstract class LetterComposite {
private List<LetterComposite> children = new ArrayList<LetterComposite>();
private List<LetterComposite> children = new ArrayList<LetterComposite>();
public void add(LetterComposite letter) {
children.add(letter);
}
public void add(LetterComposite letter) {
children.add(letter);
}
public int count() {
return children.size();
}
public int count() {
return children.size();
}
protected abstract void printThisBefore();
protected abstract void printThisBefore();
protected abstract void printThisAfter();
protected abstract void printThisAfter();
public void print() {
printThisBefore();
for (LetterComposite letter : children) {
letter.print();
}
printThisAfter();
}
public void print() {
printThisBefore();
for (LetterComposite letter : children) {
letter.print();
}
printThisAfter();
}
}

67
composite/src/main/java/com/iluwatar/composite/Messenger.java
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@ -11,48 +11,47 @@ import java.util.List;
*/
public class Messenger {
LetterComposite messageFromOrcs() {
LetterComposite messageFromOrcs() {
List<Word> words = new ArrayList<Word>();
List<Word> words = new ArrayList<Word>();
words.add(new Word(Arrays.asList(new Letter('W'), new Letter('h'),
new Letter('e'), new Letter('r'), new Letter('e'))));
words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'),
new Letter('e'), new Letter('r'), new Letter('e'))));
words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s'))));
words.add(new Word(Arrays.asList(new Letter('a'))));
words.add(new Word(Arrays.asList(new Letter('w'), new Letter('h'),
new Letter('i'), new Letter('p'))));
words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'),
new Letter('e'), new Letter('r'), new Letter('e'))));
words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s'))));
words.add(new Word(Arrays.asList(new Letter('a'))));
words.add(new Word(Arrays.asList(new Letter('w'), new Letter('a'),
new Letter('y'))));
words.add(new Word(Arrays.asList(new Letter('W'), new Letter('h'), new Letter('e'), new Letter(
'r'), new Letter('e'))));
words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter(
'r'), new Letter('e'))));
words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s'))));
words.add(new Word(Arrays.asList(new Letter('a'))));
words.add(new Word(Arrays.asList(new Letter('w'), new Letter('h'), new Letter('i'), new Letter(
'p'))));
words.add(new Word(Arrays.asList(new Letter('t'), new Letter('h'), new Letter('e'), new Letter(
'r'), new Letter('e'))));
words.add(new Word(Arrays.asList(new Letter('i'), new Letter('s'))));
words.add(new Word(Arrays.asList(new Letter('a'))));
words.add(new Word(Arrays.asList(new Letter('w'), new Letter('a'), new Letter('y'))));
return new Sentence(words);
return new Sentence(words);
}
}
LetterComposite messageFromElves() {
LetterComposite messageFromElves() {
List<Word> words = new ArrayList<Word>();
List<Word> words = new ArrayList<Word>();
words.add(new Word(Arrays.asList(new Letter('M'), new Letter('u'),
new Letter('c'), new Letter('h'))));
words.add(new Word(Arrays.asList(new Letter('w'), new Letter('i'),
new Letter('n'), new Letter('d'))));
words.add(new Word(Arrays.asList(new Letter('p'), new Letter('o'),
new Letter('u'), new Letter('r'), new Letter('s'))));
words.add(new Word(Arrays.asList(new Letter('f'), new Letter('r'),
new Letter('o'), new Letter('m'))));
words.add(new Word(Arrays.asList(new Letter('y'), new Letter('o'),
new Letter('u'), new Letter('r'))));
words.add(new Word(Arrays.asList(new Letter('m'), new Letter('o'),
new Letter('u'), new Letter('t'), new Letter('h'))));
words.add(new Word(Arrays.asList(new Letter('M'), new Letter('u'), new Letter('c'), new Letter(
'h'))));
words.add(new Word(Arrays.asList(new Letter('w'), new Letter('i'), new Letter('n'), new Letter(
'd'))));
words.add(new Word(Arrays.asList(new Letter('p'), new Letter('o'), new Letter('u'), new Letter(
'r'), new Letter('s'))));
words.add(new Word(Arrays.asList(new Letter('f'), new Letter('r'), new Letter('o'), new Letter(
'm'))));
words.add(new Word(Arrays.asList(new Letter('y'), new Letter('o'), new Letter('u'), new Letter(
'r'))));
words.add(new Word(Arrays.asList(new Letter('m'), new Letter('o'), new Letter('u'), new Letter(
't'), new Letter('h'))));
return new Sentence(words);
return new Sentence(words);
}
}
}

27
composite/src/main/java/com/iluwatar/composite/Sentence.java
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@ -9,20 +9,19 @@ import java.util.List;
*/
public class Sentence extends LetterComposite {
public Sentence(List<Word> words) {
for (Word w : words) {
this.add(w);
}
}
public Sentence(List<Word> words) {
for (Word w : words) {
this.add(w);
}
}
@Override
protected void printThisBefore() {
// nop
}
@Override
protected void printThisAfter() {
System.out.print(".");
}
@Override
protected void printThisBefore() {
// nop
}
@Override
protected void printThisAfter() {
System.out.print(".");
}
}

27
composite/src/main/java/com/iluwatar/composite/Word.java
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@ -9,20 +9,19 @@ import java.util.List;
*/
public class Word extends LetterComposite {
public Word(List<Letter> letters) {
for (Letter l : letters) {
this.add(l);
}
}
public Word(List<Letter> letters) {
for (Letter l : letters) {
this.add(l);
}
}
@Override
protected void printThisBefore() {
System.out.print(" ");
}
@Override
protected void printThisAfter() {
// nop
}
@Override
protected void printThisBefore() {
System.out.print(" ");
}
@Override
protected void printThisAfter() {
// nop
}
}

10
composite/src/test/java/com/iluwatar/composite/AppTest.java
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@ -11,9 +11,9 @@ import com.iluwatar.composite.App;
*/
public class AppTest {
@Test
public void test() {
String[] args = {};
App.main(args);
}
@Test
public void test() {
String[] args = {};
App.main(args);
}
}