1 files changed, 73 insertions, 0 deletions
diff --git a/winery/org.eclipse.winery.common/src/main/java/org/eclipse/winery/common/TOSCADocumentBuilderFactory.java b/winery/org.eclipse.winery.common/src/main/java/org/eclipse/winery/common/TOSCADocumentBuilderFactory.java
new file mode 100644
index 0000000..74a0e26
--- /dev/null
+++ b/winery/org.eclipse.winery.common/src/main/java/org/eclipse/winery/common/TOSCADocumentBuilderFactory.java
@@ -0,0 +1,73 @@
+/*******************************************************************************
+ * Copyright (c) 2013 University of Stuttgart.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and the Apache License 2.0 which both accompany this distribution,
+ * and are available at http://www.eclipse.org/legal/epl-v10.html
+ * and http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Contributors:
+ *     Oliver Kopp - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.winery.common;
+
+import java.net.URL;
+
+import javax.xml.XMLConstants;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.validation.Schema;
+import javax.xml.validation.SchemaFactory;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.xml.sax.SAXException;
+
+/**
+ * Class to produce DocumentBuilders with a pre-loaded TOSCA XSD.
+ * 
+ * In a separate class as TOSCA XSD loading takes a few seconds
+ */
+public class TOSCADocumentBuilderFactory {
+	
+	private static final Logger logger = LoggerFactory.getLogger(TOSCADocumentBuilderFactory.class);
+	
+	public static final TOSCADocumentBuilderFactory INSTANCE = new TOSCADocumentBuilderFactory();
+	private final DocumentBuilderFactory factory;
+	
+	
+	public TOSCADocumentBuilderFactory() {
+		this.factory = DocumentBuilderFactory.newInstance();
+		
+		this.factory.setNamespaceAware(true);
+		
+		// we do not need DTD validation
+		this.factory.setValidating(false);
+		
+		// we do XSD validation
+		SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
+		Schema schema;
+		URL resource = this.getClass().getResource("/TOSCA-v1.0.xsd");
+		try {
+			// takes a few seconds to load
+			schema = schemaFactory.newSchema(resource);
+			this.factory.setSchema(schema);
+		} catch (SAXException e) {
+			// TODO: load xml.xsd in offline mode
+			TOSCADocumentBuilderFactory.logger.error("Schema could not be initalized", e);
+			TOSCADocumentBuilderFactory.logger.debug("We continue nevertheless to enable offline usage");
+		}
+	}
+	
+	public DocumentBuilder getTOSCADocumentBuilder() {
+		DocumentBuilder db;
+		try {
+			db = this.factory.newDocumentBuilder();
+		} catch (ParserConfigurationException e) {
+			throw new IllegalStateException("document builder could not be initalized", e);
+		}
+		return db;
+	}
+	
+}