EventInjectionTransformer.java
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package com.mumfrey.liteloader.transformers.event;
import com.mumfrey.liteloader.transformers.ObfProvider;
import net.minecraft.launchwrapper.IClassTransformer;
public abstract class EventInjectionTransformer implements IClassTransformer
{
public EventInjectionTransformer()
{
try
{
this.addEvents();
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
/* (non-Javadoc)
* @see net.minecraft.launchwrapper.IClassTransformer#transform(java.lang.String, java.lang.String, byte[])
*/
@Override
public byte[] transform(String name, String transformedName, byte[] basicClass)
{
return basicClass;
}
/**
* Subclasses should register events here
*/
protected abstract void addEvents();
/**
* Register a new event to be injected, the event instance will be created if it does not already exist
*
* @param eventName Name of the event to use/create. Beware that IllegalArgumentException if the event was already defined with incompatible parameters
* @param targetMethod Method descriptor to identify the method to inject into
* @param injectionPoint Delegate which finds the location(s) in the target method to inject into
*
* @return the event - for fluent interface
*/
protected final Event addEvent(String eventName, MethodInfo targetMethod, InjectionPoint injectionPoint)
{
return this.addEvent(Event.getOrCreate(eventName), targetMethod, injectionPoint);
}
/**
* Register an event to be injected
*
* @param event Event to inject
* @param targetMethod Method descriptor to identify the method to inject into
* @param injectionPoint Delegate which finds the location(s) in the target method to inject into
*
* @return the event - for fluent interface
*/
protected final Event addEvent(Event event, MethodInfo targetMethod, InjectionPoint injectionPoint)
{
if (event == null)
throw new IllegalArgumentException("Event cannot be null!");
if (injectionPoint == null)
throw new IllegalArgumentException("Injection point cannot be null for event " + event.getName());
if ("true".equals(System.getProperty("mcpenv")))
{
EventTransformer.addEvent(event, targetMethod.owner, targetMethod.sig, injectionPoint);
}
else
{
EventTransformer.addEvent(event, targetMethod.owner, targetMethod.sigSrg, injectionPoint);
EventTransformer.addEvent(event, targetMethod.ownerObf, targetMethod.sigObf, injectionPoint);
}
event.addPendingInjection(targetMethod);
return event;
}
/**
* Register an access injection interface
*
* @param interfaceName
*/
protected final void addAccessor(String interfaceName)
{
EventTransformer.addAccessor(interfaceName);
}
/**
* Register an access injection interface and provide a contextual obfuscation provider
*
* @param interfaceName
* @param obfProvider
*/
protected final void addAccessor(String interfaceName, ObfProvider obfProvider)
{
EventTransformer.addAccessor(interfaceName, obfProvider);
}
}