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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2006-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * 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"
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 *
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 */

package com.sun.enterprise.config.serverbeans;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.io.PrintWriter;
import java.io.StringWriter;

import org.glassfish.api.admin.config.ApplicationName;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Service;

/**
 * Bunch of utility methods for the new serverbeans config api based on jaxb
 */
@Service
public final class ConfigBeansUtilities {

    @Inject
    private static Applications apps;

    @Inject
    private static Domain domain;
    
    // dochez : this class needs to be killed but I have no time to do it now
    // I am making it a singleton, will force its initialization early enough so
    // users can continue using the static method. Eventually all these methods will
    // need to be moved to @DuckTyped methods on the interfaces directory.
    public ConfigBeansUtilities() {
    }

    /**
     * Get the default value of Format from dtd
     */
    public static String getDefaultFormat() {
        return "%client.name% %auth-user-name% %datetime% %request% %status% %response.length%";
    }

    /**
     * Get the default value of RotationPolicy from dtd
     */
    public static String getDefaultRotationPolicy() {
        return "time";
    }

    /**
     * Get the default value of RotationEnabled from dtd
     */
    public static String getDefaultRotationEnabled() {
        return "true";
    }

    /**
     * Get the default value of RotationIntervalInMinutes from dtd
     */
    public static String getDefaultRotationIntervalInMinutes() {
        return "1440";
    }

    /**
     * Get the default value of QueueSizeInBytes from dtd
     */
    public static String getDefaultQueueSizeInBytes() {
        return "4096";
    }

    /**
     * This method is used to convert a string value to boolean.
     *
     * @return true if the value is one of true, on, yes, 1. Note
     *         that the values are case sensitive. If it is not one of these
     *         values, then, it returns false. A finest message is printed if
     *         the value is null or a info message if the values are
     *         wrong cases for valid true values.
     */
    public static boolean toBoolean(final String value) {
        final String v = null != value ? value.trim() : value;
        return null != v && ("true".equals(v)
                || "yes".equals(v)
                || "on".equals(v)
                || "1".equals(v));
    }

    /** Returns the list of system-applications that are referenced from the given server.
     *  A server references an application, if the server has an element named
     *  <application-ref> in it that points to given application. The given server
     *  is a <server> element inside domain.
     *  
     * @param sn the string denoting name of the server
     * @return List of system-applications for that server, an empty list in case there is none
     */
    public static List getSystemApplicationsReferencedFrom(String sn) {
        if (domain == null || sn == null)
            throw new IllegalArgumentException("Null argument");
        List allApps = getAllDefinedSystemApplications();
        if (allApps.isEmpty())
            return (allApps); //if there are no sys-apps, none can reference one :)
        //allApps now contains ALL the system applications
        Server s = getServerNamed(sn);
        List referencedApps = new ArrayList();
        List appsReferenced = s.getApplicationRef();
        for (ApplicationRef ref : appsReferenced) {
            for (Application app : allApps) {
                if (ref.getRef().equals(app.getName())) {
                    referencedApps.add(app);
                }
            }
        }
        return ( referencedApps );
    }
    
    public static Application getSystemApplicationReferencedFrom(String sn, String appName) {
        //returns null in case there is none
        List allApps = getSystemApplicationsReferencedFrom(sn);
        for (Application app : allApps) {
            if (app.getName().equals(appName)) {
                return ( app );
            }
        }
        return ( null );
    }
    public static boolean isNamedSystemApplicationReferencedFrom(String appName, String serverName) {
        List  referencedApps = getSystemApplicationsReferencedFrom(serverName);
        for (Application app : referencedApps) {
            if (app.getName().equals(appName))
                return ( true );
        }
        return ( false );
    }
    
    public static List getServers() {
        if (domain == null || domain.getServers() == null )
            throw new IllegalArgumentException ("Either domain is null or no  element");
        return domain.getServers().getServer();
    }

    public static Server getServerNamed(String name) {
        if (domain == null || domain.getServers() == null || name == null)
            throw new IllegalArgumentException ("Either domain is null or no  element");
        List servers = domain.getServers().getServer();
        for (Server s : servers) {
            if (name.equals(s.getName().trim())) {
                return ( s );
            }
        }
        return ( null );
    }
    
    public static List getAllDefinedSystemApplications() {
        List allSysApps = new ArrayList();
        SystemApplications sa = domain.getSystemApplications();
        if (sa != null) {
            for (ApplicationName m : sa.getModules()) {
                if (m instanceof Application)
                    allSysApps.add((Application)m);
            }
        }
        return ( allSysApps );
    }

   /**
    * Lists the app refs for non-system apps assigned to the specified server
    * @param sn server name
    * @return List of ApplicationRef for non-system apps assigned to the specified server
    */
   public static List getApplicationRefsInServer(String sn) {
       return getApplicationRefsInServer(sn, true);
   }

   /**
    * Lists the app refs for apps assigned to the specified server, excluding
    * system apps from the result if requested.
    * @param sn server name to check
    * @param excludeSystemApps whether system apps should be excluded
    * @return List of ApplicationRef for apps assigned to the specified server
    */
   public static List getApplicationRefsInServer(String sn, boolean excludeSystemApps) {

        Servers ss = domain.getServers();
        List list = ss.getServer();
        Server theServer = null;
        for (Server s : list) {
            if (s.getName().equals(sn)) {
                theServer = s;
                break;
            }
        }
        if (theServer != null) {
            List modulesToExclude = excludeSystemApps ?
                domain.getSystemApplications().getModules() : Collections.emptyList();
            List result = new ArrayList();
              for (ApplicationRef candidateRef : theServer.getApplicationRef()) {
                String appRefModuleName = candidateRef.getRef();
                boolean isSystem = false;
                for (ApplicationName sysModule : modulesToExclude) {
                    if (sysModule.getName().equals(appRefModuleName)) {
                        isSystem = true;
                        break;
                    }
                }
                if (!isSystem) {
                    result.add(candidateRef);
                }
            }
            return result;
        } else {
            return Collections.emptyList();
        }
    }


    public static ApplicationRef getApplicationRefInServer(String sn, String name) {
        Servers ss = domain.getServers();
        List list = ss.getServer();
        Server theServer = null;
        for (Server s : list) {
            if (s.getName().equals(sn)) {
                theServer = s;
                break;
            }
        }
        ApplicationRef aref = null;
        if (theServer != null) {
            List  arefs = theServer.getApplicationRef();
            for (ApplicationRef ar : arefs) {
                if (ar.getRef().equals(name)) {
                    aref = ar;
                    break;
                }
            }
        }
        return ( aref );
    }

    public static ApplicationName getModule(String moduleID) {
        for (ApplicationName module : apps.getModules()) {
            if (module.getName().equals(moduleID)) {
                return module;
            }
        }
        return null;
    }

    public static String getEnabled(String sn, String moduleID) {
        ApplicationRef appRef = getApplicationRefInServer(sn, moduleID);
        if (appRef != null) { 
            return appRef.getEnabled();
        } else {
            return null;
        }
    }

    public static String getVirtualServers(String sn, String moduleID) {
        ApplicationRef appRef = getApplicationRefInServer(sn, moduleID);
        if (appRef != null) { 
            return appRef.getVirtualServers();
        } else {
            return null;
        }
    }

   public static String getContextRoot(String moduleID) {
        ApplicationName module = getModule(moduleID);
        if (module == null) {
            return null;
        }

        if (module instanceof Application) {
            return ((Application)module).getContextRoot();
        } else if (module instanceof WebModule) {
            return ((WebModule)module).getContextRoot(); 
        } else {
            return null;
        }
    }

    public static String getLibraries(String moduleID) {
        ApplicationName module = getModule(moduleID);
        if (module == null) {
            return null;
        }

        if (module instanceof Application) {
            return ((Application)module).getLibraries();
        } else if (module instanceof WebModule) {
            return ((WebModule)module).getLibraries();
        } else if (module instanceof EjbModule) {
            return ((EjbModule)module).getLibraries();
        } else if (module instanceof J2eeApplication) {
            return ((J2eeApplication)module).getLibraries();
        } else {
            return null;
        }
    }

    public static String getLocation(String moduleID) {
        ApplicationName module = getModule(moduleID);
        if (module == null) {
            return null;
        } 

        String location = null; 
        if (module instanceof Application) {
            location =  ((Application)module).getLocation();
        } else if (module instanceof WebModule) {
            location = ((WebModule)module).getLocation();
        } else if (module instanceof EjbModule) {
            location = ((EjbModule)module).getLocation();
        } else if (module instanceof ConnectorModule) {
            location = ((ConnectorModule)module).getLocation();
        } else if (module instanceof AppclientModule) {
            location = ((AppclientModule)module).getLocation();
        } else if (module instanceof J2eeApplication) {
            location =  ((J2eeApplication)module).getLocation();
        }

        try { 
            if (location != null) {
                return new URI(location).getPath();
            } else {
                return null;
            }
        } catch (URISyntaxException e) {
            return null;
        }            
    }

    public static String getDirectoryDeployed(String moduleID) {
        ApplicationName module = getModule(moduleID);
        if (module == null) {
            return null;
        } 

        if (module instanceof Application) {
            return ((Application)module).getDirectoryDeployed();
        } else if (module instanceof WebModule) {
            return ((WebModule)module).getDirectoryDeployed();
        } else if (module instanceof EjbModule) {
            return ((EjbModule)module).getDirectoryDeployed();
        } else if (module instanceof ConnectorModule) {
            return ((ConnectorModule)module).getDirectoryDeployed();
        } else if (module instanceof AppclientModule) {
            return ((AppclientModule)module).getDirectoryDeployed();
        } else if (module instanceof J2eeApplication) {
            return ((J2eeApplication)module).getDirectoryDeployed();
        } else {
            return null;
        }
    }

    public static String join(Iterable list, String delimiter) {
        StringBuilder builder = new StringBuilder();
        for (String string : list) {
            if (builder.length() != 0) {
                builder.append(delimiter);
            }
            builder.append(string);
        }
        return builder.toString();
    }

    public static String toString(Throwable t) {
        final StringWriter writer = new StringWriter();
        t.printStackTrace(new PrintWriter(writer));

        return writer.toString();
    }

   public static Domain getDomain() {
        return domain;
   }
}




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