root / trunk / libraries / libInternationalization / src / org / gvsig / i18n / MessagesClassLoader.java @ 5868
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/**
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*
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*/
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package org.gvsig.i18n; |
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import java.io.File; |
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import java.net.MalformedURLException; |
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import java.net.URL; |
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import java.net.URLClassLoader; |
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import java.util.ArrayList; |
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import java.util.List; |
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import java.util.StringTokenizer; |
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/**
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* <p>This class offers a class loader which is able to load files from the specified
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* directories.</p>
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*
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* @author C?sar Mart?nez Izquierdo (cesar.martinez@iver.es)
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*
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*/
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public class MessagesClassLoader extends URLClassLoader { |
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/**
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* <p>Creates a new class loader, which is able to load files from the directories
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* specified as parameter.</p>
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*
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* @param urls The list of directories which will be used to load files.
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*/
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public MessagesClassLoader(URL[] urls) { |
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super(urls);
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} |
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/**
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* Loads a resource using the specified file name.
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*
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* @param res The name of the resource to be loaded.
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*/
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public URL getResource(String res) { |
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try {
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ArrayList resource = new ArrayList(); |
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StringTokenizer st = new StringTokenizer(res, "\\/"); |
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while (st.hasMoreTokens()) {
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String token = st.nextToken();
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resource.add(token); |
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} |
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URL ret = null; |
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int currentUrl;
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URL[] urls = getURLs(); |
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for (currentUrl=0; currentUrl< urls.length; currentUrl++) { |
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URL url = urls[currentUrl];
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File file = new File(url.getFile()); |
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if (url.getFile().endsWith("/")) |
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ret = getResource(file, resource); |
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} |
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if (ret != null) { |
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return ret;
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} |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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return super.getResource(res); |
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} |
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/**
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* Busca recursivamente el recurso res en el directorio base. res es una
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* lista de String's con los directorios del path y base es el directorio
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* a partir del cual se busca dicho recurso. En cada ejecuci?n del m?todo
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* se toma el primer elemento de res y se busca dicho directorio en el
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* directorio base. Si se encuentra, ser? el directorio base para una
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* nueva llamada.
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*
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* @param base Directorio desde donde parte la b?squeda del recurso.
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* @param res Lista de strings con el path del recurso que se quiere
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* encontrar
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*
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* @return URL con el recurso
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*/
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private URL getResource(File base, List res) { |
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File[] files = base.listFiles(); |
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String parte = (String) res.get(0); |
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for (int i = 0; i < files.length; i++) { |
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if (files[i].getName().compareTo(parte) == 0) { |
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if (res.size() == 1) { |
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try {
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return new URL("file:" + files[i].toString()); |
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} catch (MalformedURLException e) { |
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return null; |
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} |
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} else {
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return getResource(files[i], res.subList(1, res.size())); |
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} |
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} |
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} |
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return null; |
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} |
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} |
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