mirror of
https://github.com/tiennm99/java-design-patterns.git
synced 2026-05-19 23:26:07 +00:00
docs: add editorconfig + formatting
This commit is contained in:
Ilkka Seppälä
+91
-91
@@ -3,9 +3,9 @@ title: Bridge
|
||||
category: Structural
|
||||
language: en
|
||||
tag:
|
||||
- Decoupling
|
||||
- Extensibility
|
||||
- Gang of Four
|
||||
- Decoupling
|
||||
- Extensibility
|
||||
- Gang of Four
|
||||
---
|
||||
|
||||
## Also known as
|
||||
@@ -21,8 +21,8 @@ Decouple an abstraction from its implementation so that the two can vary indepen
|
||||
Real-world example
|
||||
|
||||
> Consider you have a weapon with different enchantments, and you are supposed to allow mixing different weapons with
|
||||
> different enchantments. What would you do? Create multiple copies of each of the weapons for each of the enchantments or
|
||||
> would you just create separate enchantment and set it for the weapon as needed? Bridge pattern allows you to do the
|
||||
> different enchantments. What would you do? Create multiple copies of each of the weapons for each of the enchantments
|
||||
> or would you just create separate enchantment and set it for the weapon as needed? Bridge pattern allows you to do the
|
||||
> second.
|
||||
|
||||
In Plain Words
|
||||
@@ -41,77 +41,77 @@ Translating our weapon example from above. Here we have the `Weapon` hierarchy:
|
||||
|
||||
```java
|
||||
public interface Weapon {
|
||||
void wield();
|
||||
void wield();
|
||||
|
||||
void swing();
|
||||
void swing();
|
||||
|
||||
void unwield();
|
||||
void unwield();
|
||||
|
||||
Enchantment getEnchantment();
|
||||
Enchantment getEnchantment();
|
||||
}
|
||||
|
||||
public class Sword implements Weapon {
|
||||
|
||||
private final Enchantment enchantment;
|
||||
private final Enchantment enchantment;
|
||||
|
||||
public Sword(Enchantment enchantment) {
|
||||
this.enchantment = enchantment;
|
||||
}
|
||||
public Sword(Enchantment enchantment) {
|
||||
this.enchantment = enchantment;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void wield() {
|
||||
LOGGER.info("The sword is wielded.");
|
||||
enchantment.onActivate();
|
||||
}
|
||||
@Override
|
||||
public void wield() {
|
||||
LOGGER.info("The sword is wielded.");
|
||||
enchantment.onActivate();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void swing() {
|
||||
LOGGER.info("The sword is swung.");
|
||||
enchantment.apply();
|
||||
}
|
||||
@Override
|
||||
public void swing() {
|
||||
LOGGER.info("The sword is swung.");
|
||||
enchantment.apply();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void unwield() {
|
||||
LOGGER.info("The sword is unwielded.");
|
||||
enchantment.onDeactivate();
|
||||
}
|
||||
@Override
|
||||
public void unwield() {
|
||||
LOGGER.info("The sword is unwielded.");
|
||||
enchantment.onDeactivate();
|
||||
}
|
||||
|
||||
@Override
|
||||
public Enchantment getEnchantment() {
|
||||
return enchantment;
|
||||
}
|
||||
@Override
|
||||
public Enchantment getEnchantment() {
|
||||
return enchantment;
|
||||
}
|
||||
}
|
||||
|
||||
public class Hammer implements Weapon {
|
||||
|
||||
private final Enchantment enchantment;
|
||||
private final Enchantment enchantment;
|
||||
|
||||
public Hammer(Enchantment enchantment) {
|
||||
this.enchantment = enchantment;
|
||||
}
|
||||
public Hammer(Enchantment enchantment) {
|
||||
this.enchantment = enchantment;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void wield() {
|
||||
LOGGER.info("The hammer is wielded.");
|
||||
enchantment.onActivate();
|
||||
}
|
||||
@Override
|
||||
public void wield() {
|
||||
LOGGER.info("The hammer is wielded.");
|
||||
enchantment.onActivate();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void swing() {
|
||||
LOGGER.info("The hammer is swung.");
|
||||
enchantment.apply();
|
||||
}
|
||||
@Override
|
||||
public void swing() {
|
||||
LOGGER.info("The hammer is swung.");
|
||||
enchantment.apply();
|
||||
}
|
||||
|
||||
@Override
|
||||
public void unwield() {
|
||||
LOGGER.info("The hammer is unwielded.");
|
||||
enchantment.onDeactivate();
|
||||
}
|
||||
@Override
|
||||
public void unwield() {
|
||||
LOGGER.info("The hammer is unwielded.");
|
||||
enchantment.onDeactivate();
|
||||
}
|
||||
|
||||
@Override
|
||||
public Enchantment getEnchantment() {
|
||||
return enchantment;
|
||||
}
|
||||
@Override
|
||||
public Enchantment getEnchantment() {
|
||||
return enchantment;
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
@@ -119,47 +119,47 @@ Here's the separate enchantment hierarchy:
|
||||
|
||||
```java
|
||||
public interface Enchantment {
|
||||
void onActivate();
|
||||
void onActivate();
|
||||
|
||||
void apply();
|
||||
void apply();
|
||||
|
||||
void onDeactivate();
|
||||
void onDeactivate();
|
||||
}
|
||||
|
||||
public class FlyingEnchantment implements Enchantment {
|
||||
|
||||
@Override
|
||||
public void onActivate() {
|
||||
LOGGER.info("The item begins to glow faintly.");
|
||||
}
|
||||
@Override
|
||||
public void onActivate() {
|
||||
LOGGER.info("The item begins to glow faintly.");
|
||||
}
|
||||
|
||||
@Override
|
||||
public void apply() {
|
||||
LOGGER.info("The item flies and strikes the enemies finally returning to owner's hand.");
|
||||
}
|
||||
@Override
|
||||
public void apply() {
|
||||
LOGGER.info("The item flies and strikes the enemies finally returning to owner's hand.");
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onDeactivate() {
|
||||
LOGGER.info("The item's glow fades.");
|
||||
}
|
||||
@Override
|
||||
public void onDeactivate() {
|
||||
LOGGER.info("The item's glow fades.");
|
||||
}
|
||||
}
|
||||
|
||||
public class SoulEatingEnchantment implements Enchantment {
|
||||
|
||||
@Override
|
||||
public void onActivate() {
|
||||
LOGGER.info("The item spreads bloodlust.");
|
||||
}
|
||||
@Override
|
||||
public void onActivate() {
|
||||
LOGGER.info("The item spreads bloodlust.");
|
||||
}
|
||||
|
||||
@Override
|
||||
public void apply() {
|
||||
LOGGER.info("The item eats the soul of enemies.");
|
||||
}
|
||||
@Override
|
||||
public void apply() {
|
||||
LOGGER.info("The item eats the soul of enemies.");
|
||||
}
|
||||
|
||||
@Override
|
||||
public void onDeactivate() {
|
||||
LOGGER.info("Bloodlust slowly disappears.");
|
||||
}
|
||||
@Override
|
||||
public void onDeactivate() {
|
||||
LOGGER.info("Bloodlust slowly disappears.");
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
@@ -167,16 +167,16 @@ Here are both hierarchies in action:
|
||||
|
||||
```java
|
||||
LOGGER.info("The knight receives an enchanted sword.");
|
||||
var enchantedSword=new Sword(new SoulEatingEnchantment());
|
||||
enchantedSword.wield();
|
||||
enchantedSword.swing();
|
||||
enchantedSword.unwield();
|
||||
var enchantedSword=new Sword(new SoulEatingEnchantment());
|
||||
enchantedSword.wield();
|
||||
enchantedSword.swing();
|
||||
enchantedSword.unwield();
|
||||
|
||||
LOGGER.info("The valkyrie receives an enchanted hammer.");
|
||||
var hammer=new Hammer(new FlyingEnchantment());
|
||||
hammer.wield();
|
||||
hammer.swing();
|
||||
hammer.unwield();
|
||||
LOGGER.info("The valkyrie receives an enchanted hammer.");
|
||||
var hammer=new Hammer(new FlyingEnchantment());
|
||||
hammer.wield();
|
||||
hammer.swing();
|
||||
hammer.unwield();
|
||||
```
|
||||
|
||||
Here's the console output.
|
||||
|
||||
Reference in New Issue
Block a user