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package org.directwebremoting.impl;

import java.util.Collection;
import java.util.HashSet;

import org.directwebremoting.extend.Module;
import org.directwebremoting.extend.ModuleManager;

/**
 * A ModuleManager that delegates to customModuleManager and fallbackModuleManager.
 * @author Mike Wilson [mikewse at g mail dot com]
 */
public class MasterModuleManager implements ModuleManager
{
    /* (non-Javadoc)
     * @see org.directwebremoting.extend.ModuleManager#getModuleNames(boolean)
     */
    public Collection getModuleNames(boolean includeHidden)
    {
        Collection names = new HashSet();
        if (customModuleManager != null)
        {
            names.addAll(customModuleManager.getModuleNames(includeHidden));
        }
        if (fallbackModuleManager != null)
        {
            names.addAll(fallbackModuleManager.getModuleNames(includeHidden));
        }
        return names;
    }

    /* (non-Javadoc)
     * @see org.directwebremoting.extend.ModuleManager#getModule(java.lang.String, boolean)
     */
    public Module getModule(String scriptName, boolean includeHidden)
    {
        Module module = null;
        if (customModuleManager != null)
        {
            module = customModuleManager.getModule(scriptName, includeHidden);
        }
        if (module == null && fallbackModuleManager != null)
        {
            module = fallbackModuleManager.getModule(scriptName, includeHidden);
        }
        return module;
    }

    /**
     * @param moduleManager the moduleManager to set
     */
    public void setCustomModuleManager(ModuleManager moduleManager)
    {
        this.customModuleManager = moduleManager;
    }

    /**
     * @param moduleManager the moduleManager to set
     */
    public void setFallbackModuleManager(ModuleManager moduleManager)
    {
        this.fallbackModuleManager = moduleManager;
    }

    ModuleManager customModuleManager;

    ModuleManager fallbackModuleManager;
}