001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.settings;
016    
017    import com.liferay.portal.kernel.resource.ResourceRetriever;
018    import com.liferay.portal.kernel.resource.manager.ResourceManager;
019    import com.liferay.portal.kernel.settings.BaseSettings;
020    import com.liferay.portal.kernel.settings.Settings;
021    import com.liferay.portal.kernel.util.StringPool;
022    import com.liferay.portal.kernel.util.StringUtil;
023    
024    import java.io.IOException;
025    
026    import java.util.Properties;
027    
028    /**
029     * @author Jorge Ferrer
030     * @author Iv??n Zaera
031     */
032    public class PropertiesSettings extends BaseSettings {
033    
034            public PropertiesSettings(
035                    Properties properties, ResourceManager resourceManager) {
036    
037                    this(properties, resourceManager, null);
038            }
039    
040            public PropertiesSettings(
041                    Properties properties, ResourceManager resourceManager,
042                    Settings parentSettings) {
043    
044                    super(parentSettings);
045    
046                    _properties = properties;
047                    _resourceManager = resourceManager;
048            }
049    
050            @Override
051            protected String doGetValue(String key) {
052                    return readProperty(key);
053            }
054    
055            @Override
056            protected String[] doGetValues(String key) {
057                    return StringUtil.split(doGetValue(key));
058            }
059    
060            protected String getProperty(String key) {
061                    return readProperty(key);
062            }
063    
064            protected String readProperty(String key) {
065                    String value = _properties.getProperty(key);
066    
067                    if (!isLocationVariable("resource", value)) {
068                            return value;
069                    }
070    
071                    ResourceRetriever resourceRetriever =
072                            _resourceManager.getResourceRetriever(
073                                    getLocation("resource", value));
074    
075                    try {
076                            return StringUtil.read(resourceRetriever.getInputStream());
077                    }
078                    catch (IOException ioe) {
079                            throw new RuntimeException("Unable to read " + value, ioe);
080                    }
081            }
082    
083            private String getLocation(String protocol, String value) {
084                    return value.substring(protocol.length() + 3, value.length() - 1);
085            }
086    
087            private boolean isLocationVariable(String protocol, String value) {
088                    if (value == null) {
089                            return false;
090                    }
091    
092                    String prefix =
093                            StringPool.DOLLAR + StringPool.OPEN_CURLY_BRACE + protocol +
094                                    StringPool.COLON;
095    
096                    if (value.startsWith(prefix) &&
097                            value.endsWith(StringPool.CLOSE_CURLY_BRACE)) {
098    
099                            return true;
100                    }
101    
102                    return false;
103            }
104    
105            private final Properties _properties;
106            private final ResourceManager _resourceManager;
107    
108    }