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/*******************************************************************************
 *
 * Copyright (c) 2004-2009 Oracle Corporation.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * 
 *    Kohsuke Kawaguchi, Daniel Dyer, Stephen Connolly
 *
 *
 *******************************************************************************/ 

package hudson.scm;

import hudson.model.Descriptor;
import hudson.model.Descriptor.FormException;
import hudson.util.DescriptorList;
import hudson.Extension;
import org.kohsuke.stapler.StaplerRequest;

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

import net.sf.json.JSONObject;

/**
 * List of all installed {@link RepositoryBrowsers}.
 *
 * @author Kohsuke Kawaguchi
 */
public class RepositoryBrowsers {

    /**
     * List of all installed {@link RepositoryBrowsers}.
     *
     * @deprecated as of 1.286. Use {@link RepositoryBrowser#all()} for read
     * access and {@link Extension} for registration.
     */
    public static final List>> LIST = new DescriptorList>((Class) RepositoryBrowser.class);

    /**
     * Only returns those {@link RepositoryBrowser} descriptors that extend from
     * the given type.
     */
    public static List>> filter(Class t) {
        List>> r = new ArrayList>>();
        for (Descriptor> d : RepositoryBrowser.all()) {
            if (d.isSubTypeOf(t)) {
                r.add(d);
            }
        }
        return r;
    }

    /**
     * Creates an instance of {@link RepositoryBrowser} from a form submission.
     *
     * @deprecated since 2008-06-19. Use
     * {@link #createInstance(Class, StaplerRequest, JSONObject, String)}.
     */
    public static  T createInstance(Class type, StaplerRequest req, String fieldName) throws FormException {
        List>> list = filter(type);
        String value = req.getParameter(fieldName);
        if (value == null || value.equals("auto")) {
            return null;
        }

        return type.cast(list.get(Integer.parseInt(value)).newInstance(req, null/*TODO*/));
    }

    /**
     * Creates an instance of {@link RepositoryBrowser} from a form submission.
     *
     * @since 1.227
     */
    public static  T createInstance(Class type, StaplerRequest req, JSONObject parent, String fieldName) throws FormException {
        JSONObject o = (JSONObject) parent.get(fieldName);
        if (o == null) {
            return null;
        }

        return req.bindJSON(type, o);
    }
}