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/*
 * Copyright 2014 - Present Rafael Winterhalter
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.bytebuddy.implementation.bind.annotation;

import net.bytebuddy.description.annotation.AnnotationDescription;
import net.bytebuddy.description.method.MethodDescription;
import net.bytebuddy.description.method.ParameterDescription;
import net.bytebuddy.implementation.Implementation;
import net.bytebuddy.implementation.bind.MethodDelegationBinder;
import net.bytebuddy.implementation.bytecode.assign.Assigner;
import net.bytebuddy.implementation.bytecode.constant.DefaultValue;

import java.lang.annotation.*;

/**
 * 

* Binds the parameter type's default value to the annotated parameter, i.e. {@code null} or a numeric value * representing zero. *

*

* Important: Don't confuse this annotation with {@link net.bytebuddy.asm.Advice.Unused} or * {@link net.bytebuddy.asm.MemberSubstitution.Unused}. This annotation should be used with * {@link net.bytebuddy.implementation.MethodDelegation} only. *

* * @see net.bytebuddy.implementation.MethodDelegation * @see net.bytebuddy.implementation.bind.annotation.TargetMethodAnnotationDrivenBinder */ @Documented @Retention(RetentionPolicy.RUNTIME) @Target(ElementType.PARAMETER) public @interface Empty { /** * A binder for the {@link net.bytebuddy.implementation.bind.annotation.Empty} annotation. */ enum Binder implements TargetMethodAnnotationDrivenBinder.ParameterBinder { /** * The singleton instance. */ INSTANCE; /** * {@inheritDoc} */ public Class getHandledType() { return Empty.class; } /** * {@inheritDoc} */ public MethodDelegationBinder.ParameterBinding bind(AnnotationDescription.Loadable annotation, MethodDescription source, ParameterDescription target, Implementation.Target implementationTarget, Assigner assigner, Assigner.Typing typing) { return new MethodDelegationBinder.ParameterBinding.Anonymous(DefaultValue.of(target.getType().asErasure())); } } }




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