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Trait.java
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Trait.java
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package net.citizensnpcs.api.trait;
import org.bukkit.event.Listener;
import net.citizensnpcs.api.exception.NPCLoadException;
import net.citizensnpcs.api.npc.NPC;
import net.citizensnpcs.api.util.DataKey;
/**
* Represents a Trait that can be loaded and saved.
*/
public abstract class Trait implements Listener, Runnable {
private final String name;
protected NPC npc = null;
private boolean runImplemented = true;
protected Trait(String name) {
this.name = name.toLowerCase();
}
/**
* Gets the name of this trait.
*
* @return Name of this trait
*/
public final String getName() {
return name;
}
/**
* @return The {@link NPC} this trait is attached to. May be null.
*/
public final NPC getNPC() {
return npc;
}
public boolean isRunImplemented() {
run();
return runImplemented;
}
public void linkToNPC(NPC npc) {
if (this.npc != null)
throw new IllegalArgumentException("npc may only be set once");
this.npc = npc;
onAttach();
}
/**
* Loads a trait.
*
* @param key
* DataKey to load from
* @throws NPCLoadException
* Thrown if this trait failed to load properly
*/
public void load(DataKey key) throws NPCLoadException {
}
/**
* Called when the trait has been attached to an {@link NPC}. {@link #npc} will be null until this is called.
*/
public void onAttach() {
}
/**
* Called when the trait has been newly copied to an {@link NPC}.
*/
public void onCopy() {
}
/**
* Called just before the attached {@link NPC} is despawned. {@link NPC#getEntity()} will be non-null.
*/
public void onDespawn() {
}
/**
* Called when a trait is removed from the attached {@link NPC}.
*/
public void onRemove() {
}
/**
* Called when an {@link NPC} is spawned. {@link NPC#getEntity()} will return null until this is called. This is
* also called onAttach when the NPC is already spawned.
*/
public void onSpawn() {
}
@Override
public void run() {
runImplemented = false;
}
/**
* Saves a trait.
*
* @param key
* DataKey to save to
*/
public void save(DataKey key) {
}
}