Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java @ 960:92027887775a
DataCage: Added a recommend() method to generate recommendations for
a given artifact, outs and extra parameters.
flys-artifacts/trunk@2379 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 20 Jul 2011 17:03:00 +0000 |
parents | 22bc87a42a0d |
children | f48cef242e7f |
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package de.intevation.flys.artifacts.services.meta; import java.util.Map; import java.util.HashMap; import java.io.InputStream; import java.io.IOException; import java.io.File; import java.io.FileInputStream; import java.sql.Connection; import java.sql.SQLException; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.hibernate.Session; import org.hibernate.jdbc.Work; import de.intevation.artifacts.common.utils.Config; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.flys.artifacts.FLYSArtifact; import de.intevation.flys.backend.SessionHolder; import de.intevation.artifactdatabase.data.StateData; 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 Document recommend(FLYSArtifact artifact, String [] outs) { return recommend(artifact, outs, null); } public Document recommend( FLYSArtifact artifact, String [] outs, Map<String, Object> extraParameters ) { Map<String, Object> parameters = new HashMap<String, Object>(); if (extraParameters != null) { parameters.putAll(extraParameters); } parameters.put("current-state-id", artifact.getCurrentStateId()); parameters.put("artifact-outs", outs); for (StateData sd: artifact.getAllData()) { Object value = sd.getValue(); if (value == null) { continue; } String key = sd.getName().replace('.', '-'); parameters.put(key, value); } return process(parameters); } public Document process(final Map<String, Object> parameters) { final Document result = XMLUtils.newDocument(); if (builder != null) { log.error("builder not configured properly."); return result; } Session session = SessionHolder.HOLDER.get(); session.doWork(new Work() { @Override public void execute(Connection connection) throws SQLException { builder.build(connection, result, parameters); } }); return result; } 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 :