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• ModifyReceiver.java

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com.llamalad7.mixinextras.injector.ModifyReceiver Maven / Gradle / Ivy

package com.llamalad7.mixinextras.injector;

import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Slice;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Allows you to modify the receiver of a non-static
 * {@link org.spongepowered.asm.mixin.injection.points.BeforeInvoke method call} or
 * {@link org.spongepowered.asm.mixin.injection.points.BeforeFieldAccess field get/set}.
 * 

 * Your handler method receives the targeted instruction's arguments (optionally followed by the enclosing method's
 * parameters), and should return the adjusted receiver for the operation.
 * 
 *   
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Targeted operation
Handler signature
Non-static method call
private (static) ReceiverType handler(ReceiverType original, <params of the
 *     original call>)
super. method call
private (static) ThisClass handler(ThisClass original, <params of the original
 *     call>)
Non-static field get
private (static) ReceiverType handler(ReceiverType original)
Non-static field write
private (static) ReceiverType handler(ReceiverType original, FieldType newValue)
 *     
 * This chains when used by multiple people, unlike
 * {@link org.spongepowered.asm.mixin.injection.Redirect @Redirect}.
 * 

 * If you never use the {@code original} then you risk other people's changes being silently ignored.
 * 

 * See the wiki article for more info.
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface ModifyReceiver {
    String[] method();

    At[] at();

    Slice[] slice() default {};

    boolean remap() default true;

    int require() default -1;

    int expect() default 1;

    int allow() default -1;
}