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/*
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 * Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
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 * and Distribution License("CDDL") (collectively, the "License").  You
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package com.sun.jersey.oauth.signature;

import java.util.HashMap;
import com.sun.jersey.spi.service.ServiceFinder;

/**
 * Loads and provides instances of OAuth signature methods.
 *
 * @author Paul C. Bryan 
 * @author Hubert A. Le Van Gong 
 */
class Methods {

    /** Contains the loaded service provider classes. */
    private static final HashMap methods = loadMethods();

    /**
     * Returns the OAuth method for a given method name.
     *
     * @param name the name of the OAuth method to get instance of.
     * @return the method, or null if no such method could be loaded.
     */
    public static OAuthSignatureMethod getInstance(String name) {
        return methods.get(name);
    }

    /**
     * Returns as hash map of loaded OAuth methods.
     */
    private static HashMap loadMethods() {
        HashMap map = new HashMap();
        for (OAuthSignatureMethod method : ServiceFinder.find(OAuthSignatureMethod.class, true)) {
            map.put(method.name(), method);
        }
        return map;
    }
}