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PropertyProxy.java
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PropertyProxy.java
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// Property proxy - a bit unusual
package structural.proxy;
import java.util.Objects;
// Property class set up to fully represent a property
class Property<T>
{
private T value;
public Property(T value) {
this.value = value;
}
public T getValue() {
return value;
}
public void setValue(T value) {
// logging
this.value = value;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Property<?> property = (Property<?>) o;
return value.equals(property.value);
}
@Override
public int hashCode() {
return value!= null ? value.hashCode() : 0;
}
}
//class Creature
//{
// private int agility;
//
// public Creature()
// {
//
// }
//
// public Creature(int agility) {
//// agility = 123; // not recorded anywhere; agility itself has no getter/setter
// }
//
// public int getAgility() {
// return agility;
// }
//
// public void setAgility(int agility) {
// this.agility = agility;
// }
//}
class Creature
{
private Property<Integer> agility = new Property<>(0);
public void setAgility(int value)
{
agility.setValue(value);
}
public int getAgility()
{
return agility.getValue();
}
}
class PropertyProxyDemo
{
public static void main(String[] args)
{
Creature creature = new Creature();
creature.setAgility(3);
System.out.println(creature.getAgility());
}
}