Example usage for org.springframework.context.index CandidateComponentsIndex getCandidateTypes

Introduction

In this page you can find the example usage for org.springframework.context.index CandidateComponentsIndex getCandidateTypes.

Prototype

public Set<String> getCandidateTypes(String basePackage, String stereotype) 

Source Link

Document

Return the candidate types that are associated with the specified stereotype.

Usage

From source file:org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.java

private Set<BeanDefinition> addCandidateComponentsFromIndex(CandidateComponentsIndex index,
        String basePackage) {//from   ww  w .  j a  va 2 s .co  m
    Set<BeanDefinition> candidates = new LinkedHashSet<>();
    try {
        Set<String> types = new HashSet<>();
        for (TypeFilter filter : this.includeFilters) {
            String stereotype = extractStereotype(filter);
            if (stereotype == null) {
                throw new IllegalArgumentException("Failed to extract stereotype from " + filter);
            }
            types.addAll(index.getCandidateTypes(basePackage, stereotype));
        }
        boolean traceEnabled = logger.isTraceEnabled();
        boolean debugEnabled = logger.isDebugEnabled();
        for (String type : types) {
            MetadataReader metadataReader = getMetadataReaderFactory().getMetadataReader(type);
            if (isCandidateComponent(metadataReader)) {
                AnnotatedGenericBeanDefinition sbd = new AnnotatedGenericBeanDefinition(
                        metadataReader.getAnnotationMetadata());
                if (isCandidateComponent(sbd)) {
                    if (debugEnabled) {
                        logger.debug("Using candidate component class from index: " + type);
                    }
                    candidates.add(sbd);
                } else {
                    if (debugEnabled) {
                        logger.debug("Ignored because not a concrete top-level class: " + type);
                    }
                }
            } else {
                if (traceEnabled) {
                    logger.trace("Ignored because matching an exclude filter: " + type);
                }
            }
        }
    } catch (IOException ex) {
        throw new BeanDefinitionStoreException("I/O failure during classpath scanning", ex);
    }
    return candidates;
}

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