1 files changed, 111 insertions, 0 deletions
diff --git a/src/main/java/org/cristalise/kernel/utils/LocalObjectLoader.java b/src/main/java/org/cristalise/kernel/utils/LocalObjectLoader.java
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+++ b/src/main/java/org/cristalise/kernel/utils/LocalObjectLoader.java
@@ -0,0 +1,111 @@
+/**
+ * This file is part of the CRISTAL-iSE kernel.
+ * Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * http://www.fsf.org/licensing/licenses/lgpl.html
+ */
+package org.cristalise.kernel.utils;
+
+import java.util.Iterator;
+
+import org.cristalise.kernel.common.InvalidDataException;
+import org.cristalise.kernel.common.ObjectNotFoundException;
+import org.cristalise.kernel.common.PersistencyException;
+import org.cristalise.kernel.entity.proxy.ItemProxy;
+import org.cristalise.kernel.lifecycle.ActivityDef;
+import org.cristalise.kernel.lifecycle.instance.stateMachine.StateMachine;
+import org.cristalise.kernel.lookup.DomainPath;
+import org.cristalise.kernel.lookup.Path;
+import org.cristalise.kernel.persistency.ClusterStorage;
+import org.cristalise.kernel.persistency.outcome.Schema;
+import org.cristalise.kernel.persistency.outcome.Viewpoint;
+import org.cristalise.kernel.process.Gateway;
+
+
+public class LocalObjectLoader {
+	private static ActDefCache actCache = new ActDefCache();
+	private static StateMachineCache smCache = new StateMachineCache();
+
+	static public ItemProxy loadLocalObjectDef(String root, String name)
+		throws ObjectNotFoundException
+	{
+		DomainPath defRoot = new DomainPath(root);
+	    Iterator<Path> e = Gateway.getLookup().search(defRoot, name);
+	    if (e.hasNext()) {
+	    	DomainPath defPath = (DomainPath)e.next();
+		    if (e.hasNext()) throw new ObjectNotFoundException("Too many matches for "+name+" in "+root);
+		    return Gateway.getProxyManager().getProxy(defPath);
+	    }
+	    else {
+	    	throw new ObjectNotFoundException("No match for "+name+" in "+root);
+	    }
+
+	}
+
+	static public String getScript(String scriptName, int scriptVersion) throws ObjectNotFoundException {
+	    Logger.msg(5, "Loading script "+scriptName+" v"+scriptVersion);
+	    try {
+	    	ItemProxy script = loadLocalObjectDef("/desc/Script/", scriptName);
+   	        Viewpoint scriptView = (Viewpoint)script.getObject(ClusterStorage.VIEWPOINT + "/Script/" + scriptVersion);
+	    	return scriptView.getOutcome().getData();
+	    } catch (PersistencyException ex) {
+	    	Logger.error(ex);
+	        throw new ObjectNotFoundException("Error loading script " + scriptName + " version " + scriptVersion);
+	    }
+
+	}
+
+	static public Schema getSchema(String schemaName, int schemaVersion) throws ObjectNotFoundException {
+		Logger.msg(5, "Loading schema "+schemaName+" v"+schemaVersion);
+	    
+	    String docType = schemaName;
+	    int docVersion = schemaVersion;
+	    String schemaData;
+
+	    // don't bother if this is the Schema schema - for bootstrap esp.
+	    if (schemaName.equals("Schema") && schemaVersion == 0)
+	        return new Schema(docType, docVersion, "");
+
+        ItemProxy schema = loadLocalObjectDef("/desc/OutcomeDesc/", schemaName);
+        Viewpoint schemaView = (Viewpoint)schema.getObject(ClusterStorage.VIEWPOINT + "/Schema/" + schemaVersion);
+        try {
+        	schemaData = schemaView.getOutcome().getData();
+        } catch (PersistencyException ex) {
+        	Logger.error(ex);
+        	throw new ObjectNotFoundException("Problem loading schema "+schemaName+" v"+schemaVersion+": "+ex.getMessage());
+        }
+	    return new Schema(docType, docVersion, schemaData);
+	}
+
+	/**
+	 * Retrieves a named version of activity def from the database
+	 *
+	 * @param actName - activity name
+	 * @param version - named version (String)
+	 * @return ActivityDef
+	 * @throws ObjectNotFoundException - When activity or version does not exist
+	 */
+	static public ActivityDef getActDef(String actName, int actVersion) throws ObjectNotFoundException, InvalidDataException {
+		Logger.msg(5, "Loading activity def "+actName+" v"+actVersion);
+		return actCache.get(actName, actVersion);
+	}
+	
+	static public StateMachine getStateMachine(String smName, int smVersion) throws ObjectNotFoundException, InvalidDataException {
+		Logger.msg(5, "Loading activity def "+smName+" v"+smVersion);
+		return smCache.get(smName, smVersion);
+	}
+}