gaspersic/java-design-patterns
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

#984 #987 update readmes

Browse Source
This commit is contained in:
Ilkka Seppälä 2019-11-12 22:12:47 +02:00
parent 33ea7335b1
commit 3c57bf7078
2 changed files with 58 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
chain/README.md
View File

@ -135,7 +135,7 @@ public class OrcKing {
Then it is used as follows Then it is used as follows
```java ```java
OrcKing king = new OrcKing(); var king = new OrcKing();
king.makeRequest(new Request(RequestType.DEFEND_CASTLE, "defend castle")); // Orc commander handling request "defend castle" king.makeRequest(new Request(RequestType.DEFEND_CASTLE, "defend castle")); // Orc commander handling request "defend castle"
king.makeRequest(new Request(RequestType.TORTURE_PRISONER, "torture prisoner")); // Orc officer handling request "torture prisoner" king.makeRequest(new Request(RequestType.TORTURE_PRISONER, "torture prisoner")); // Orc officer handling request "torture prisoner"
king.makeRequest(new Request(RequestType.COLLECT_TAX, "collect tax")); // Orc soldier handling request "collect tax" king.makeRequest(new Request(RequestType.COLLECT_TAX, "collect tax")); // Orc soldier handling request "collect tax"

89
composite/README.md
View File

@ -35,41 +35,56 @@ Taking our sentence example from above. Here we have the base class and differen
```java ```java
public abstract class LetterComposite { public abstract class LetterComposite {
private List<LetterComposite> children = new ArrayList<>(); private List<LetterComposite> children = new ArrayList<>();
public void add(LetterComposite letter) { public void add(LetterComposite letter) {
children.add(letter); children.add(letter);
} }
public int count() { public int count() {
return children.size(); return children.size();
} }
protected void printThisBefore() {}
protected void printThisAfter() {} protected void printThisBefore() {
}
protected void printThisAfter() {
}
public void print() { public void print() {
printThisBefore(); printThisBefore();
for (LetterComposite letter : children) { children.forEach(LetterComposite::print);
letter.print();
}
printThisAfter(); printThisAfter();
} }
} }
public class Letter extends LetterComposite { public class Letter extends LetterComposite {
private char c;
private char character;
public Letter(char c) { public Letter(char c) {
this.c = c; this.character = c;
} }
@Override @Override
protected void printThisBefore() { protected void printThisBefore() {
System.out.print(c); System.out.print(character);
} }
} }
public class Word extends LetterComposite { public class Word extends LetterComposite {
public Word(List<Letter> letters) { public Word(List<Letter> letters) {
for (Letter l : letters) { letters.forEach(this::add);
this.add(l); }
public Word(char... letters) {
for (char letter : letters) {
this.add(new Letter(letter));
} }
} }
@Override @Override
protected void printThisBefore() { protected void printThisBefore() {
System.out.print(" "); System.out.print(" ");
@ -77,11 +92,11 @@ public class Word extends LetterComposite {
} }
public class Sentence extends LetterComposite { public class Sentence extends LetterComposite {
public Sentence(List<Word> words) { public Sentence(List<Word> words) {
for (Word w : words) { words.forEach(this::add);
this.add(w);
}
} }
@Override @Override
protected void printThisAfter() { protected void printThisAfter() {
System.out.print("."); System.out.print(".");
@ -93,39 +108,49 @@ Then we have a messenger to carry messages
```java ```java
public class Messenger { public class Messenger {
LetterComposite messageFromOrcs() { LetterComposite messageFromOrcs() {
List<Word> words = List.of(
new Word(List.of(new Letter('W'), new Letter('h'), new Letter('e'), new Letter('r'), new Letter('e'))), var words = List.of(
new Word(List.of(new Letter('t'), new Letter('h'), new Letter('e'), new Letter('r'), new Letter('e'))), new Word('W', 'h', 'e', 'r', 'e'),
new Word(List.of(new Letter('i'), new Letter('s'))), new Word('t', 'h', 'e', 'r', 'e'),
new Word(List.of(new Letter('a'))), new Word('i', 's'),
new Word(List.of(new Letter('w'), new Letter('h'), new Letter('i'), new Letter('p'))), new Word('a'),
new Word(List.of(new Letter('t'), new Letter('h'), new Letter('e'), new Letter('r'), new Letter('e'))), new Word('w', 'h', 'i', 'p'),
new Word(List.of(new Letter('i'), new Letter('s'))), new Word('t', 'h', 'e', 'r', 'e'),
new Word(List.of(new Letter('a'))), new Word('i', 's'),
new Word(List.of(new Letter('w'), new Letter('a'), new Letter('y')))); new Word('a'),
new Word('w', 'a', 'y')
);
return new Sentence(words); return new Sentence(words);
} }
LetterComposite messageFromElves() { LetterComposite messageFromElves() {
List<Word> words = List.of(
new Word(List.of(new Letter('M'), new Letter('u'), new Letter('c'), new Letter('h'))), var words = List.of(
new Word(List.of(new Letter('w'), new Letter('i'), new Letter('n'), new Letter('d'))), new Word('M', 'u', 'c', 'h'),
new Word(List.of(new Letter('p'), new Letter('o'), new Letter('u'), new Letter('r'), new Letter('s'))), new Word('w', 'i', 'n', 'd'),
new Word(List.of(new Letter('f'), new Letter('r'), new Letter('o'), new Letter('m'))), new Word('p', 'o', 'u', 'r', 's'),
new Word(List.of(new Letter('y'), new Letter('o'), new Letter('u'), new Letter('r'))), new Word('f', 'r', 'o', 'm'),
new Word(List.of(new Letter('m'), new Letter('o'), new Letter('u'), new Letter('t'), new Letter('h')))); new Word('y', 'o', 'u', 'r'),
new Word('m', 'o', 'u', 't', 'h')
);
return new Sentence(words); return new Sentence(words);
} }
} }
``` ```
And then it can be used as And then it can be used as
```java ```java
LetterComposite orcMessage = new Messenger().messageFromOrcs(); var orcMessage = new Messenger().messageFromOrcs();
orcMessage.print(); // Where there is a whip there is a way. orcMessage.print(); // Where there is a whip there is a way.
LetterComposite elfMessage = new Messenger().messageFromElves(); var elfMessage = new Messenger().messageFromElves();
elfMessage.print(); // Much wind pours from your mouth. elfMessage.print(); // Much wind pours from your mouth.
``` ```