dubbo AnnotatedMethodParameterProcessor 源码
dubbo AnnotatedMethodParameterProcessor 代码
文件路径：/dubbo-metadata/dubbo-metadata-processor/src/main/java/org/apache/dubbo/metadata/annotation/processing/rest/AnnotatedMethodParameterProcessor.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.dubbo.metadata.annotation.processing.rest;
import org.apache.dubbo.common.extension.SPI;
import org.apache.dubbo.common.lang.Prioritized;
import org.apache.dubbo.metadata.rest.RestMethodMetadata;
import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.VariableElement;
/**
* The interface to process the parameter of method that was annotated
*
* @since 2.7.6
*/
@SPI
public interface AnnotatedMethodParameterProcessor extends Prioritized {
/**
* The string presenting the annotation type
*
* @return non-null
*/
String getAnnotationType();
/**
* Process the specified method {@link VariableElement parameter}
*
* @param annotation {@link AnnotationMirror the target annotation} whose type is {@link #getAnnotationType()}
* @param parameter {@link VariableElement method parameter}
* @param parameterIndex the index of parameter in the method
* @param method {@link ExecutableElement method that parameter belongs to}
* @param restMethodMetadata {@link RestMethodMetadata the metadata is used to update}
*/
void process(AnnotationMirror annotation, VariableElement parameter, int parameterIndex, ExecutableElement method,
RestMethodMetadata restMethodMetadata);
/**
* Build the default value
*
* @param parameterIndex the index of parameter
* @return the placeholder
*/
static String buildDefaultValue(int parameterIndex) {
return "{" + parameterIndex + "}";
}
}
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