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 * 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
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package org.glassfish.deployment.common;

import com.sun.enterprise.config.serverbeans.Application;
import com.sun.enterprise.config.serverbeans.ApplicationConfig;
import com.sun.enterprise.config.serverbeans.Engine;
import com.sun.enterprise.config.serverbeans.Module;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

/**
 * During redeployment we preserve the application config information, if any,
 * that the administrator has defined for the application.  Then, during the
 * deploy part of redeployment we restore it.
 * 
 * This class encapsulates the dependencies on exactly how we store that 
 * information in the application properties in the deployment context.
 * 
 * @author tjquinn
 */
public class ApplicationConfigInfo {

    private final Map> moduleToEngineToAppConfig;

    public ApplicationConfigInfo() {
        moduleToEngineToAppConfig = createNewMap();
    }

    public ApplicationConfigInfo(final Properties appProperties) {
        Object map =  
                appProperties.get(DeploymentProperties.APP_CONFIG);
        if (map == null) {
            moduleToEngineToAppConfig = createNewMap();
        } else {
            moduleToEngineToAppConfig = (Map>) map;
        }
    }

    public ApplicationConfigInfo(final Application app) {

        moduleToEngineToAppConfig = createNewMap();
        if (app != null) {
            for (Module m : app.getModule()) {
                for (Engine e : m.getEngines()) {
                    put(m.getName(), e.getSniffer(), e.getApplicationConfig());
                }
            }
        }
    }

    private Map> createNewMap() {
        return new HashMap>();
    }
    
    public  T get(final String moduleName,
            final String engineName) {
        T result = null;
        Map engineToAppConfig =
                moduleToEngineToAppConfig.get(moduleName);
        if (engineToAppConfig != null) {
            result = (T) engineToAppConfig.get(engineName);
        }
        return result;
    }

    public void  put(final String moduleName, final String engineName,
            final ApplicationConfig appConfig) {
        Map engineToAppConfig =
                moduleToEngineToAppConfig.get(moduleName);
        if (engineToAppConfig == null) {
            engineToAppConfig = new HashMap();
            moduleToEngineToAppConfig.put(moduleName, engineToAppConfig);
        }
        engineToAppConfig.put(engineName, appConfig);
    }

    public Set moduleNames() {
        return moduleToEngineToAppConfig.keySet();
    }

    public Set engineNames(final String moduleName) {
        return moduleToEngineToAppConfig.get(moduleName).keySet();
    }

    public void store(final Properties appProps) {
        appProps.put(DeploymentProperties.APP_CONFIG, moduleToEngineToAppConfig);
    }

}