Java110CmdDocDiscoveryRegistrar.java
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package com.java110.doc.registrar;
import com.java110.doc.annotation.Java110CmdDoc;
import com.java110.doc.annotation.Java110CmdDocDiscovery;
import com.java110.doc.entity.CmdDocDto;
import org.springframework.beans.factory.BeanClassLoaderAware;
import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.context.ResourceLoaderAware;
import org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.io.ResourceLoader;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.core.type.filter.AnnotationTypeFilter;
import org.springframework.util.ClassUtils;
import org.springframework.util.StringUtils;
import java.beans.Introspector;
import java.lang.annotation.Annotation;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* api 文档 注入类
* Created by wuxw on 2018/7/2.
*/
public class Java110CmdDocDiscoveryRegistrar implements ImportBeanDefinitionRegistrar, ResourceLoaderAware, BeanClassLoaderAware {
private ResourceLoader resourceLoader;
private ClassLoader classLoader;
public Java110CmdDocDiscoveryRegistrar() {
}
@Override
public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
try {
registerListener(importingClassMetadata, registry);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
@Override
public void setBeanClassLoader(ClassLoader classLoader) {
this.classLoader = classLoader;
}
@Override
public void setResourceLoader(ResourceLoader resourceLoader) {
this.resourceLoader = resourceLoader;
}
/**
* 注册侦听
*
* @param metadata
* @param registry
*/
public void registerListener(AnnotationMetadata metadata,
BeanDefinitionRegistry registry) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
ClassPathScanningCandidateComponentProvider scanner = getScanner();
scanner.setResourceLoader(this.resourceLoader);
Set<String> basePackages;
Map<String, Object> attrs = metadata
.getAnnotationAttributes(Java110CmdDocDiscovery.class.getName());
Object cmdPublishClassObj = attrs.get("cmdDocClass");
//Assert.notNull(cmdPublishClassObj,"Java110CmdDiscovery 没有配置 cmdPublishClass 属性");
Class<?> cmdPublishClass = (Class<?>) cmdPublishClassObj;
AnnotationTypeFilter annotationTypeFilter = new AnnotationTypeFilter(
Java110CmdDoc.class);
scanner.addIncludeFilter(annotationTypeFilter);
basePackages = getBasePackages(metadata);
for (String basePackage : basePackages) {
Set<BeanDefinition> candidateComponents = scanner
.findCandidateComponents(basePackage);
for (BeanDefinition candidateComponent : candidateComponents) {
if (candidateComponent instanceof AnnotatedBeanDefinition) {
// verify annotated class is an interface
AnnotatedBeanDefinition beanDefinition = (AnnotatedBeanDefinition) candidateComponent;
AnnotationMetadata annotationMetadata = beanDefinition.getMetadata();
Map<String, Object> attributes = annotationMetadata
.getAnnotationAttributes(
Java110CmdDoc.class.getCanonicalName());
String beanName = getListenerName(attributes, beanDefinition);
CmdDocDto cmdDocDto = new CmdDocDto();
cmdDocDto.setCmdClass(beanDefinition.getBeanClassName());
cmdDocDto.setDescription(attributes.get("description").toString());
cmdDocDto.setAuthor(attributes.get("author").toString());
cmdDocDto.setResource(attributes.get("resource").toString());
cmdDocDto.setTitle(attributes.get("title").toString());
cmdDocDto.setUrl(attributes.get("url").toString());
cmdDocDto.setVersion(attributes.get("version").toString());
cmdDocDto.setHttpMethod(attributes.get("httpMethod").toString());
cmdDocDto.setServiceCode(attributes.get("serviceCode").toString());
cmdDocDto.setSeq(Integer.parseInt(attributes.get("seq").toString()));
/*BeanDefinitionHolder definitionHolder = new BeanDefinitionHolder(beanDefinition, beanName);
BeanDefinitionReaderUtils.registerBeanDefinition(definitionHolder, registry);*/
Method method = cmdPublishClass.getMethod("addCmdDoc", CmdDocDto.class);
method.invoke(null, cmdDocDto);
}
}
}
}
protected ClassPathScanningCandidateComponentProvider getScanner() {
return new ClassPathScanningCandidateComponentProvider(false) {
@Override
protected boolean isCandidateComponent(
AnnotatedBeanDefinition beanDefinition) {
if (beanDefinition.getMetadata().isIndependent()) {
// TODO until SPR-11711 will be resolved
if (beanDefinition.getMetadata().isInterface()
&& beanDefinition.getMetadata()
.getInterfaceNames().length == 1
&& Annotation.class.getName().equals(beanDefinition
.getMetadata().getInterfaceNames()[0])) {
try {
Class<?> target = ClassUtils.forName(
beanDefinition.getMetadata().getClassName(),
Java110CmdDocDiscoveryRegistrar.this.classLoader);
return !target.isAnnotation();
} catch (Exception ex) {
this.logger.error(
"Could not load target class: "
+ beanDefinition.getMetadata().getClassName(),
ex);
}
}
return true;
}
return false;
}
};
}
protected Set<String> getBasePackages(AnnotationMetadata importingClassMetadata) {
Map<String, Object> attributes = importingClassMetadata
.getAnnotationAttributes(Java110CmdDocDiscovery.class.getCanonicalName());
Set<String> basePackages = new HashSet<String>();
for (String pkg : (String[]) attributes.get("value")) {
if (StringUtils.hasText(pkg)) {
basePackages.add(pkg);
}
}
for (String pkg : (String[]) attributes.get("basePackages")) {
if (StringUtils.hasText(pkg)) {
basePackages.add(pkg);
}
}
if (basePackages.isEmpty()) {
basePackages.add(
ClassUtils.getPackageName(importingClassMetadata.getClassName()));
}
return basePackages;
}
/**
* 获取名称
*
* @param listeners
* @param beanDefinition
* @return
*/
private String getListenerName(Map<String, Object> listeners, AnnotatedBeanDefinition beanDefinition) {
if (listeners == null) {
String shortClassName = ClassUtils.getShortName(beanDefinition.getBeanClassName());
return Introspector.decapitalize(shortClassName);
}
String value = (String) listeners.get("value");
if (!StringUtils.hasText(value)) {
value = (String) listeners.get("name");
}
if (StringUtils.hasText(value)) {
return value;
}
String shortClassName = ClassUtils.getShortName(beanDefinition.getBeanClassName());
value = Introspector.decapitalize(shortClassName);
return value;
}
}