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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
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 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * 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
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
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package com.sun.enterprise.module.single;

import com.sun.enterprise.module.*;
import com.sun.enterprise.module.impl.ModulesRegistryImpl;
import com.sun.hk2.component.InhabitantsParser;
import com.sun.hk2.component.Holder;

import java.io.IOException;
import java.util.Collection;
import java.util.ArrayList;
import java.util.List;

/**
 * Normal modules registry with configuration handling backed up
 * by a single class loader. There is one virtual module available in the modules
 * registry and that module's class loader is the single class loader used to
 * load all artifacts.
 *
 * @author Jerome Dochez
 */
public class SingleModulesRegistry  extends ModulesRegistryImpl {

    final ClassLoader singleClassLoader;
    final Module[] proxyMod = new Module[1];

    public SingleModulesRegistry(ClassLoader singleCL) {
        this(singleCL, null);
    }


    public SingleModulesRegistry(ClassLoader singleCL, List mappings) {

        super(null);
        this.singleClassLoader = singleCL;
        setParentClassLoader(singleClassLoader);

        ModuleDefinition moduleDef = null;
        try {
            moduleDef = new ProxyModuleDefinition(singleClassLoader, mappings);
        } catch (IOException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }

        proxyMod[0] = new ProxyModule(this, moduleDef, singleClassLoader);
        add(moduleDef);
    }

    @Override
    public Module find(Class clazz) {
        Module m = super.find(clazz);
        if (m == null)
            return proxyMod[0];
        return m;
    }

    @Override
    public Collection getModules(String moduleName) {
        // I could not care less about the modules names
        return getModules();
    }

    @Override
    public Collection getModules() {
        ArrayList list = new ArrayList();
        list.add(proxyMod[0]);
        return list;
    }

    @Override
    public Module makeModuleFor(String name, String version, boolean resolve) throws ResolveError {
        return proxyMod[0];
    }

    @Override
    public void parseInhabitants(Module module, String name, InhabitantsParser inhabitantsParser)
            throws IOException {

        Holder holder = new Holder() {
            public ClassLoader get() {
                return proxyMod[0].getClassLoader();
            }
        };

        for (InhabitantsDescriptor d : proxyMod[0].getMetadata().getHabitats(name))
            inhabitantsParser.parse(d.createScanner(), holder);
    }

}