Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java @ 959:a2b20ed3d3b4
Datacage: Added custom provider for XPath functions.
flys-artifacts/trunk@2378 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 20 Jul 2011 16:28:49 +0000 |
parents | 22bc87a42a0d |
children | 92027887775a |
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package de.intevation.flys.artifacts.services.meta; import java.io.InputStream; import java.io.IOException; import java.io.File; import java.io.FileInputStream; import org.apache.log4j.Logger; import org.w3c.dom.Document; import de.intevation.artifacts.common.utils.Config; import de.intevation.artifacts.common.utils.XMLUtils; public class DataCage { private static Logger log = Logger.getLogger(DataCage.class); public static final String XPATH_META_DATA_TEMPLATE = "/artifact-database/metadata/@template"; private static DataCage INSTANCE; protected Builder builder; public DataCage() { } public DataCage(Builder builder) { this.builder = builder; } public Builder getBuilder() { return builder; } public static synchronized DataCage getInstance() { if (INSTANCE == null) { INSTANCE = createDataCage(); } return INSTANCE; } protected static Builder createBuilder(File file) { log.debug("DataCage.createBuilder"); if (!file.isFile() || !file.canRead()) { log.error("Cannot open template file '" + file + "'"); return null; } InputStream in = null; try { in = new FileInputStream(file); Document template = XMLUtils.parseDocument(in); if (template == null) { log.error("cannot parse meta data template"); } else { return new Builder(template); } } catch (IOException ioe) { log.error(ioe); } finally { if (in != null) { try { in.close(); } catch (IOException ioe) { log.error(ioe); } } } return null; } protected static DataCage createDataCage() { log.debug("DataCage.createDataCage"); String path = Config.getStringXPath(XPATH_META_DATA_TEMPLATE); if (path == null) { log.error("no path to template file given"); return null; } path = Config.replaceConfigDir(path); return new DataCage(createBuilder(new File(path))); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :