--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/services/meta/DataCage.java	Wed Jul 20 09:56:39 2011 +0000
@@ -0,0 +1,97 @@
+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 :