com.cedarsoft.configuration.xml.XmlConfigurationManager.java Source code

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Here is the source code for com.cedarsoft.configuration.xml.XmlConfigurationManager.java

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/**
 * Copyright (C) cedarsoft GmbH.
 *
 * Licensed under the GNU General Public License version 3 (the "License")
 * with Classpath Exception; you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *         http://www.cedarsoft.org/gpl3ce
 *         (GPL 3 with Classpath Exception)
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 3 only, as
 * published by the Free Software Foundation. cedarsoft GmbH designates this
 * particular file as subject to the "Classpath" exception as provided
 * by cedarsoft GmbH in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 3 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 3 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact cedarsoft GmbH, 72810 Gomaringen, Germany,
 * or visit www.cedarsoft.com if you need additional information or
 * have any questions.
 */

package com.cedarsoft.configuration.xml;

import javax.inject.Inject;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.HierarchicalConfiguration;
import org.apache.commons.configuration.XMLConfiguration;

import javax.annotation.Nonnull;

/**
 * Configures configurations
 *
 * @author Johannes Schneider (<a href=mailto:js@cedarsoft.com>js@cedarsoft.com</a>)
 */
public class XmlConfigurationManager {
    @Nonnull
    private static final String MODULES_KEY = "modules";

    @Nonnull
    private final XMLConfiguration configuration;

    /**
     * <p>Constructor for XmlConfigurationManager.</p>
     *
     * @param configuration a XMLConfiguration object.
     */
    @Inject
    public XmlConfigurationManager(@Nonnull XMLConfiguration configuration) {
        this.configuration = configuration;

        if (this.configuration.getFileName() != null) {
            Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
                @Override
                public void run() {
                    save();
                }
            }));
        }
    }

    protected void save() {
        try {
            this.configuration.save();
        } catch (ConfigurationException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Returns the configuration for the given moduleType
     *
     * @param moduleType the moduleType
     * @return the configuration for the given  moduleType
     */
    @Nonnull
    public HierarchicalConfiguration getModuleConfiguration(@Nonnull Class<?> moduleType) {
        String moduleTypeName = moduleType.getName().replaceAll("\\$", ".");
        HierarchicalConfiguration modulesConfiguration = getModulesConfiguration();
        try {
            return modulesConfiguration.configurationAt(moduleTypeName);
        } catch (IllegalArgumentException ignore) {
            modulesConfiguration.addProperty(moduleTypeName, "");
            return modulesConfiguration.configurationAt(moduleTypeName);
        }
    }

    @Nonnull
    HierarchicalConfiguration getModulesConfiguration() {
        try {
            return configuration.configurationAt(MODULES_KEY);
        } catch (IllegalArgumentException ignore) {
            configuration.addProperty(MODULES_KEY, "");
            return configuration.configurationAt(MODULES_KEY);
        }
    }

    /**
     * <p>Getter for the field <code>configuration</code>.</p>
     *
     * @return a HierarchicalConfiguration object.
     */
    @Nonnull
    public HierarchicalConfiguration getConfiguration() {
        return configuration;
    }
}