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This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.

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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
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package com.sun.faces.spi;


import java.util.List;
import java.util.ArrayList;

/**
 * Factory class for creating ConfigurationResourceProvider instances
 * using the Java services discovery mechanism.
 */
public class ConfigurationResourceProviderFactory {


    public enum ProviderType {

        /**
         * ConfigurationResourceProvider type for configuration resources
         * that follow the faces-config DTD/Schema.
         */
        FacesConfig(FacesConfigResourceProvider.SERVICES_KEY),

        /**
         * ConfigurationResourceProvider type for configuration resources
         * that follow the Facelet taglib DTD/Schema.
         */
        FaceletConfig(FaceletConfigResourceProvider.SERVICES_KEY);

        String servicesKey;

        ProviderType(String servicesKey) {
            this.servicesKey = servicesKey;
        }
        
    }


    // ---------------------------------------------------------- Public Methods


    /**
     * @param providerType the type of providers that should be discovered and instantiated.
     *
     * @return an array of all ConfigurationResourceProviders discovered that
     *  match the specified ProviderType.
     */
    public static ConfigurationResourceProvider[] createProviders(ProviderType providerType) {

        String[] serviceEntries = ServiceFactoryUtils.getServiceEntries(providerType.servicesKey);
        List providers = new ArrayList();
        if (serviceEntries.length > 0) {
            for (String serviceEntry : serviceEntries) {
                try {
                    ConfigurationResourceProvider provider = (ConfigurationResourceProvider)
                          ServiceFactoryUtils.getProviderFromEntry(serviceEntry, null, null);
                    if (provider != null) {
                        if (ProviderType.FacesConfig == providerType) {
                            if (!(provider instanceof FacesConfigResourceProvider)) {
                                throw new IllegalStateException("Expected ConfigurationResourceProvider type to be an instance of FacesConfigResourceProvider");
                            }
                        } else {
                            if (!(provider instanceof FaceletConfigResourceProvider)) {
                                throw new IllegalStateException("Expected ConfigurationResourceProvider type to be an instance of FaceletConfigResourceProvider");
                            }
                        }
                        providers.add(provider);
                    }
                } catch(ClassCastException cce) {
                    // we are going to ignore these for now.
                }
            }
            return providers.toArray(new ConfigurationResourceProvider[providers.size()]);
        } else {
            return new ConfigurationResourceProvider[0];
        }        
    }
}




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