Example usage for org.apache.lucene.util SPIClassIterator get

Introduction

In this page you can find the example usage for org.apache.lucene.util SPIClassIterator get.

Prototype

public static <S> SPIClassIterator<S> get(Class<S> clazz, ClassLoader loader) 

Source Link

Document

Creates a new SPI iterator to lookup services of type clazz using the given classloader.

Usage

From source file:org.elasticsearch.xpack.core.security.SecurityExtension.java

License:Open Source License

/**
 * Loads the XPackSecurityExtensions from the given class loader
 *//*from  w  ww.  j a  v a2 s . c o m*/
static List<SecurityExtension> loadExtensions(ClassLoader loader) {
    SPIClassIterator<SecurityExtension> iterator = SPIClassIterator.get(SecurityExtension.class, loader);
    List<SecurityExtension> extensions = new ArrayList<>();
    while (iterator.hasNext()) {
        final Class<? extends SecurityExtension> c = iterator.next();
        try {
            extensions.add(c.getConstructor().newInstance());
        } catch (Exception e) {
            throw new ServiceConfigurationError("failed to load security extension [" + c.getName() + "]", e);
        }
    }
    return extensions;
}

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