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// Portions Copyright [2018] [Payara Foundation and/or its affiliates]
package com.sun.jaspic.config.factory;

/**
 *
 * @author ronmonzillo
 */
public class AuthConfigFileFactory extends BaseAuthConfigFactory {

    // MUST "hide" regStore in derived class.
    private static volatile RegStoreFileParser regStore;

    /**
     * To specialize the defaultEntries passed to the {@link RegStoreFileParser} constructor, create another subclass of
     * BaseAuthconfigFactory, that is basically a copy of this class, with a change to the third argument of the call to new
     * ResSToreFileParser. To ensure runtime use of the the associated regStore, make sure that the new subclass also
     * contains an implementation of the getRegStore method.
     * 
     * 
     * As done within this class, use the locks defined in BaseAuthConfigFactory to serialize access to the regStore (both
     * within the class constructor, and within getRegStore)
     * 
     *
     * 
     * All EentyInfo OBJECTS PASSED as default Entries MUST HAVE BEEN CONSTRUCTED USING THE FOLLOWING CONSTRUCTOR: 
     * EntryInfo(String className, Map properties);
     * 
     * 
     *
     */
    public AuthConfigFileFactory() {
        if (doReadLocked(() -> regStore != null)) {
            return;
        }

        String userDir = System.getProperty("user.dir");

        doWriteLocked(() -> {
            if (regStore == null) {
                regStore = new RegStoreFileParser(userDir, CONF_FILE_NAME, null);
                _loadFactory();
            }
        });
    }

    @Override
    protected RegStoreFileParser getRegStore() {
        return doReadLocked(() -> regStore);
    }
}