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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */


package org.apache.axis2.description;

import org.apache.axis2.AxisFault;
import org.apache.axis2.engine.AxisConfiguration;
import org.apache.axis2.engine.AxisEvent;
import org.apache.axis2.i18n.Messages;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;

public class AxisServiceGroup extends AxisDescription {

    //to check whether user has put WWW dir or not
    private boolean foundWebResources;
    // to store module ref at deploy time parsing
    private ArrayList modulesList = new ArrayList();

    // to store modeule configuration info
    private HashMap moduleConfigmap;

    // class loader
    private ClassLoader serviceGroupClassLoader;

    // to keep name of the service group
    private String serviceGroupName;

    public AxisServiceGroup() {
        moduleConfigmap = new HashMap();
    }

    public AxisServiceGroup(AxisConfiguration axisDescription) {
        this();
        setParent(axisDescription);
    }

    /**
     * Adds module configuration, if there is moduleConfig tag in service.
     *
     * @param moduleConfiguration the ModuleConfiguration to add
     */
    public void addModuleConfig(ModuleConfiguration moduleConfiguration) {
        if (moduleConfigmap == null) {
            moduleConfigmap = new HashMap();
        }

        moduleConfigmap.put(moduleConfiguration.getModuleName(), moduleConfiguration);
    }

    public void addModuleref(String moduleref) {
        modulesList.add(moduleref);
    }

    public void addService(AxisService service) throws AxisFault {
        if (service == null) {
            return;
        }

        if (serviceGroupName == null) {
            // setup a temporary name based on the first service under this group
            serviceGroupName = service.getName();
        }

        service.setParent(this);

        AxisConfiguration axisConfig = getAxisConfiguration();

        if (axisConfig != null) {
            for (Iterator iterator = getEngagedModules().iterator(); iterator.hasNext();) {
                Object o = iterator.next();
                AxisModule axisModule;
                if (o instanceof AxisModule) {
                    axisModule = (AxisModule) o;
                } else if (o instanceof String) { //Should this be checked
                    String moduleName = (String) o;
                    axisModule = axisConfig.getModule(moduleName);
                    if (axisModule == null) {
                        throw new AxisFault(Messages.getMessage("modulenotavailble", moduleName));
                    }
                } else {
                    throw new AxisFault(Messages.getMessage("modulenotavailble"));
                }
                service.engageModule(axisModule);
            }

        }
        service.setLastUpdate();
        addChild(service);
        if (axisConfig != null) {
            axisConfig.addToAllServicesMap(service);
        }
    }

    /**
     * When a module gets engaged on a ServiceGroup, we have to engage it for each Service.
     *
     * @param module the newly-engaged AxisModule
     * @param engager
     * @throws AxisFault if there is a problem
     */
    protected void onEngage(AxisModule module, AxisDescription engager) throws AxisFault {
        for (Iterator serviceIter = getServices(); serviceIter.hasNext();) {
            AxisService axisService = (AxisService) serviceIter.next();
            axisService.engageModule(module, engager);
        }
    }

    public void onDisengage(AxisModule module) throws AxisFault {
        for (Iterator serviceIter = getServices(); serviceIter.hasNext();) {
            AxisService axisService = (AxisService) serviceIter.next();
            axisService.disengageModule(module);
        }
    }

    public void removeService(String name) throws AxisFault {
        AxisService service = getService(name);

        if (service != null) {
            getAxisConfiguration().notifyObservers(new AxisEvent(AxisEvent.SERVICE_REMOVE,service),
                    service);
        }

        removeChild(name);
    }

    public ModuleConfiguration getModuleConfig(String moduleName) {
        return (ModuleConfiguration) moduleConfigmap.get(moduleName);
    }

    public ArrayList getModuleRefs() {
        return modulesList;
    }

    public AxisService getService(String name) throws AxisFault {
        return (AxisService) getChild(name);
    }

    public ClassLoader getServiceGroupClassLoader() {
        return serviceGroupClassLoader;
    }

    public String getServiceGroupName() {
        // Note: if the serviceGroupName is not set, then this could be null.
        // If the serviceGroupName has not been set and a service is added to this group,
        // then the serviceGroupName will default to the name of the first service
        return serviceGroupName;
    }

    public Iterator getServices() {
        return (Iterator)getChildren();
    }

    public void setAxisDescription(AxisConfiguration axisDescription) {
        setParent(axisDescription);
    }

    public void setServiceGroupClassLoader(ClassLoader serviceGroupClassLoader) {
        this.serviceGroupClassLoader = serviceGroupClassLoader;
    }

    public void setServiceGroupName(String serviceGroupName) {
        this.serviceGroupName = serviceGroupName;
    }

    public Object getKey() {
        // Note: if the serviceGroupName is not set, then this could be null.
        // If the serviceGroupName has not been set and a service is added to this group,
        // then the serviceGroupName will default to the name of the first service
        return this.serviceGroupName;
    }

    public boolean isFoundWebResources() {
        return foundWebResources;
    }

    public void setFoundWebResources(boolean foundWebResources) {
        this.foundWebResources = foundWebResources;
     }
}