svn-gvsig-desktop / branches / F2 / extensions / extJCRS / install / IzPack / src / lib / com / izforge / izpack / installer / ResourceManager.java @ 20036
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/*
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* $Id: ResourceManager.java 5819 2006-06-14 07:29:09Z cesar $
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* IzPack
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* Copyright (C) 2001,2002 Marcus Stursberg
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*
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* File : ResourceManager.java
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* Description : Class to get resources from the installer
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* Author's email : marcus@emsty.de
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* Author's Website : http://www.emasty.de
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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package com.izforge.izpack.installer; |
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import java.io.ByteArrayOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.net.URL; |
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import javax.swing.ImageIcon; |
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/**
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* With this ResourceManager you are able to get resources from the jar file.
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*
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* All resources are loaded language dependent as it's done in
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* java.util.ResourceBundle. To set a language dependent resource just append
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* '_' and the locale to the end of the Resourcename<br>
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* <br>
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* Example:
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* <li> InfoPanel.info - for default value</li>
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* <li> InfoPanel.info_deu - for german value</li>
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* <li> InfoPanel.info_eng - for english value</li> <br>
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*
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* This class is almost a singleton. It is created once using
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* <code>create</code> by the installer and later, the instance is retrieved
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* using <code>getInstance</code>.
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*
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* @author Marcus Stursberg
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*/
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public class ResourceManager |
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{ |
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/**
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* Contains the current language of the installer The locale is taken from
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* InstallData#installData#getAttribute("langpack") If there is no language
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* set, the language is english.
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*/
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private String locale = ""; |
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/** The base path where to find the resources */
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protected final String resourceBasePath = "/res/"; |
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/** Contains the given InstallData */
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private AutomatedInstallData installData;
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/** The instance of this class. */
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private static ResourceManager instance = null; |
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/**
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* Constructor. Protected because this is a singleton.
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*
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* @param data - the current installData
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*/
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protected ResourceManager(AutomatedInstallData data)
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{ |
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this.installData = data;
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if (data.localeISO3 != null) |
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{ |
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this.locale = data.localeISO3;
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} |
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else
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{ |
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// try to figure out ourself
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this.locale = installData.xmlData.getAttribute("langpack", "eng"); |
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} |
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} |
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/**
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* Create the resource manager.
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*
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* This method should be called only once. If it is called a second
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* time, the already existing instance is returned. The resource manager
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* should be called <b>after</b> the language has been set in
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* {@link AutomatedInstallData#localeISO3}
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*
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* @param data the installation information
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* @return the created instance
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*/
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public static ResourceManager create (AutomatedInstallData data) |
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{ |
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if (ResourceManager.instance == null) |
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ResourceManager.instance = new ResourceManager (data);
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return ResourceManager.instance;
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} |
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/**
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* Return the resource manager.
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*
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* @return the resource manager instance, null if no instance has been
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* created
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*/
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public static ResourceManager getInstance () |
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{ |
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return ResourceManager.instance;
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} |
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/**
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* This method is used to get the language dependent path of the given
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* resource. If there is a resource for the current language the path of the
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* language dependen resource is returnd. If there's no resource for the
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* current lanuage the default path is returned.
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*
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* @param resource Resource to load language dependen
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* @return the language dependent path of the
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* given resource
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* @throws ResourceNotFoundException If the resource is not found
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*/
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private String getLanguageResourceString(String resource) throws ResourceNotFoundException |
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{ |
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InputStream in;
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String resourcePath = this.resourceBasePath + resource + "_" + this.locale; |
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in = ResourceManager.class.getResourceAsStream(resourcePath); |
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if (in != null) |
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return resourcePath;
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else
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{ |
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// if there's no language dependent resource found
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resourcePath = this.resourceBasePath + resource;
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in = ResourceManager.class.getResourceAsStream(resourcePath); |
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if (in != null) |
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return resourcePath;
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else
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throw new ResourceNotFoundException("Can not find Resource " + |
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resource + " for language " + this.locale); |
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} |
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} |
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/**
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* Returns an InputStream contains the given Resource The Resource is loaded
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* language dependen by the informations from <code>this.locale</code> If
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* there is no Resource for the current language found, the default Resource
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* is given.
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*
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* @param resource The resource to load
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* @return an InputStream contains
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* the requested resource
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* @exception ResourceNotFoundException Description of the
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* Exception
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* @throws ResourceManager.ResourceNotFoundException thrown if there is no
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* resource found
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*/
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public InputStream getInputStream(String resource) throws ResourceNotFoundException |
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{ |
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String resourcepath = this.getLanguageResourceString(resource); |
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//System.out.println ("reading resource "+resourcepath);
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return ResourceManager.class.getResourceAsStream(resourcepath);
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} |
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/**
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* Returns a URL refers to the given Resource
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*
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* @param resource the resource to load
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* @return A languagedependen URL
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* spezifies the requested resource
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* @exception ResourceNotFoundException Description of the
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* Exception
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* @throws ResourceManager.ResourceNotFoundException thrown if there is no
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* resource found
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*/
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public URL getURL(String resource) throws ResourceNotFoundException |
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{ |
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try
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{ |
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return this.getClass().getResource(this.getLanguageResourceString(resource + "_" + installData.localeISO3)); |
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} |
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catch (Exception ex) |
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{ |
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return this.getClass().getResource(this.getLanguageResourceString(resource)); |
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} |
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} |
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/**
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* Returns a text resource from the jar file. The resource is loaded by
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* ResourceManager#getResource and then converted into text.
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*
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* @param resource - a text resource to load
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* @return a String contains the text of the
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* resource
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* @throws ResourceNotFoundException if the resource can not be found
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* @throws IOException if the resource can not be loaded
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*/
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//Maybe we can add a text parser for this method
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public String getTextResource(String resource) throws ResourceNotFoundException, |
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IOException
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{ |
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InputStream in = null; |
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try
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{ |
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in = this.getInputStream(resource + "_" + this.installData.localeISO3); |
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} |
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catch (Exception ex) |
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{ |
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in = this.getInputStream(resource);
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} |
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ByteArrayOutputStream infoData = new ByteArrayOutputStream(); |
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byte[] buffer = new byte[5120]; |
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int bytesInBuffer;
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while ((bytesInBuffer = in.read(buffer)) != -1) |
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infoData.write(buffer, 0, bytesInBuffer);
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return infoData.toString();
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} |
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/**
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* Returns a laguage dependent ImageIcon for the given Resource
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*
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* @param resource resrouce of the Icon
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* @return a ImageIcon loaded from the given
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* Resource
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* @throws ResourceNotFoundException thrown when the resource can not be
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* found
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* @throws IOException if the resource can not be loaded
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*/
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public ImageIcon getImageIconResource(String resource) throws ResourceNotFoundException, |
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IOException
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{ |
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return new ImageIcon(this.getURL(resource)); |
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} |
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/**
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* Sets the locale for the resourcefiles. The locale is taken from
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* InstallData#installData#getAttribute("langpack") If there is no language
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* set, the default language is english.
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*
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* @param locale of the resourcefile
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*/
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public void setLocale(String locale) |
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{ |
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this.locale = locale;
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} |
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/**
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* Returns the locale for the resourcefiles. The locale is taken from
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* InstallData#installData#getAttribute("langpack") If there is no language
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* set, the default language is english.
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*
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* @return the current language
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*/
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public String getLocale() |
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{ |
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return this.locale; |
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} |
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} |
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