import com.fasterxml.classmate.TypeResolver;
import com.google.common.base.Optional;
import io.swagger.annotations.ApiModelProperty;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.ibatis.javassist.*;
import org.apache.ibatis.javassist.bytecode.AnnotationsAttribute;
import org.apache.ibatis.javassist.bytecode.ConstPool;
import org.apache.ibatis.javassist.bytecode.annotation.Annotation;
import org.apache.ibatis.javassist.bytecode.annotation.StringMemberValue;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import springfox.documentation.schema.ModelRef;
import springfox.documentation.service.ResolvedMethodParameter;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.ParameterBuilderPlugin;
import springfox.documentation.spi.service.contexts.ParameterContext;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
import java.util.stream.Collectors;
/**
* 重写 swagger2 的 ParameterBuilderPlugin 支持自定义白名单黑名单注解
* @author xudaz
* @date 2021/6/12
*/
@Component
@Order
@Slf4j
class MyParameterBuilderPlugin implements ParameterBuilderPlugin {
@Autowired
private TypeResolver typeResolver;
@Override
public void apply(ParameterContext parameterContext) {
ResolvedMethodParameter methodParameter = parameterContext.resolvedMethodParameter();
Class<?> originClass = parameterContext.resolvedMethodParameter().getParameterType().getErasedType();
// 排除属性
ApiIgp igpOptional = null;
@SuppressWarnings("Guava")
Optional<ApiIgp> apiIgpOptional = methodParameter.findAnnotation(ApiIgp.class);
if ( apiIgpOptional.isPresent() ) {
igpOptional = apiIgpOptional.get();
}
// 需要属性
ApiNeed needOptional = null;
@SuppressWarnings("Guava")
Optional<ApiNeed> apiNeedOptional = methodParameter.findAnnotation(ApiNeed.class);
if ( apiNeedOptional.isPresent() ) {
needOptional = apiNeedOptional.get();
}
if (null != igpOptional || null != needOptional ) {
Random random = new Random();
//model 名称
String name = originClass.getSimpleName() + SwaggerConfig.MY_MODEL_NAME_PRE + random.nextInt(100);
try {
// 排除 (黑名单)
if ( null != igpOptional ) {
String[] properties = igpOptional.value();
parameterContext.getDocumentationContext()
.getAdditionalModels()
//向documentContext的Models中添加我们新生成的Class
.add(typeResolver.resolve(createRefModelIgp(properties, originClass.getPackage()+"."+name, originClass)));
}
// 需要 (白名单)
if ( null != needOptional ) {
String[] properties = needOptional.value();
parameterContext.getDocumentationContext()
.getAdditionalModels()
//向documentContext的Models中添加我们新生成的Class
.add(typeResolver.resolve(createRefModelNeed(properties, originClass.getPackage()+"."+name, originClass)));
}
} catch (Exception e) {
log.error("swagger切面异常", e);
}
//修改Map参数的ModelRef为我们动态生成的class
parameterContext.parameterBuilder()
.parameterType("body")
.modelRef(new ModelRef(name))
.name(name);
}
}
/**
* 创建自定义mode给swagger2 排除参数
* @param properties 需要排除的参数
* @param name model 名称
* @param origin originClass
* @return r
*/
private Class<?> createRefModelIgp(String[] properties, String name, Class<?> origin) {
ClassPool pool = ClassPool.getDefault();
// 动态创建一个class
CtClass ctClass = pool.makeClass( name);
try {
Field[] fields = origin.getDeclaredFields();
List<Field> fieldList = Arrays.asList(fields);
List<String> ignoreProperties = Arrays.asList(properties);
// 过滤掉 properties 的参数
List<Field> dealFields = fieldList.stream().filter(s -> !ignoreProperties.contains(s.getName())).collect(Collectors.toList());
addField2CtClass(dealFields, origin, ctClass);
return ctClass.toClass();
} catch (Exception e) {
log.error("swagger切面异常", e);
return null;
}
}
/**
* 创建自定义mode给swagger2 需要参数
* @param properties 需要排除的参数
* @param name model 名称
* @param origin originClass
* @return r
*/
private Class<?> createRefModelNeed(String[] properties, String name, Class<?> origin) {
ClassPool pool = ClassPool.getDefault();
CtClass ctClass = pool.makeClass( name);
try {
Field[] fields = origin.getDeclaredFields();
List<Field> fieldList = Arrays.asList(fields);
List<String> ignoreProperties = Arrays.asList(properties);
// 过滤掉 非 properties 的参数
List<Field> dealFields = fieldList.stream().filter(s -> ignoreProperties.contains(s.getName())).collect(Collectors.toList());
addField2CtClass(dealFields, origin, ctClass);
return ctClass.toClass();
} catch (Exception e) {
log.error("swagger切面异常", e);
return null;
}
}
private void addField2CtClass(List<Field> dealFields, Class<?> origin, CtClass ctClass ) throws NoSuchFieldException, NotFoundException, CannotCompileException {
// 倒序遍历
for (int i = dealFields.size() - 1; i >= 0; i--) {
Field field = dealFields.get(i);
CtField ctField = new CtField(ClassPool.getDefault().get(field.getType().getName()), field.getName(), ctClass);
ctField.setModifiers(Modifier.PUBLIC);
ApiModelProperty ampAnno = origin.getDeclaredField(field.getName()).getAnnotation(ApiModelProperty.class);
String attributes = java.util.Optional.ofNullable(ampAnno).map(ApiModelProperty::value).orElse("");
//添加model属性说明
if (StringUtils.isNotBlank(attributes) ){
ConstPool constPool = ctClass.getClassFile().getConstPool();
AnnotationsAttribute attr = new AnnotationsAttribute(constPool, AnnotationsAttribute.visibleTag);
Annotation ann = new Annotation(ApiModelProperty.class.getName(), constPool);
ann.addMemberValue("value", new StringMemberValue(attributes, constPool));
attr.addAnnotation(ann);
ctField.getFieldInfo().addAttribute(attr);
}
ctClass.addField(ctField);
}
}
@Override
public boolean supports(DocumentationType documentationType) {
return true;
}
}