Example usage for org.apache.commons.discovery.resource ClassLoaders size

Introduction

In this page you can find the example usage for org.apache.commons.discovery.resource ClassLoaders size.

Prototype

public int size() 

Source Link

Usage

From source file:org.codehaus.cargo.generic.AbstractFactoryRegistry.java

/**
 * Lists up {@link AbstractFactoryRegistry}s that are discovered.
 * /*from   w  ww  .  jav a  2s  .c om*/
 * @param classLoader See {@link #register(ClassLoader, DeployableFactory)} for more details.
 * @return always non-null but can be empty.
 */
private static List<AbstractFactoryRegistry> list(ClassLoader classLoader) {
    ClassLoader cl;
    ClassLoaders loaders = new ClassLoaders();

    cl = classLoader;
    if (cl != null) {
        loaders.put(cl);
    }

    cl = Thread.currentThread().getContextClassLoader();
    if (cl != null) {
        loaders.put(cl);
    }

    cl = AbstractFactoryRegistry.class.getClassLoader();
    if (cl != null) {
        loaders.put(cl);
    }

    cl = ResourceUtils.getResourceLoader();
    if (cl != null) {
        loaders.put(cl);
    }

    cl = JDKHooks.getJDKHooks().getSystemClassLoader();
    if (cl != null) {
        loaders.put(cl);
    }

    if (loaders.size() == 0) {
        // this is not our day. bail out.
        return Collections.EMPTY_LIST;
    }

    List<AbstractFactoryRegistry> registries = new ArrayList<AbstractFactoryRegistry>();
    Enumeration providers = Service.providers(new SPInterface(AbstractFactoryRegistry.class), loaders);
    while (providers.hasMoreElements()) {
        Object provider = providers.nextElement();
        if (provider instanceof AbstractFactoryRegistry) {
            registries.add((AbstractFactoryRegistry) provider);
        }
    }

    return registries;
}

---