add XML tooling to extend Node with XPath capabilities

Author: PhilippSalvisberg

sqldev/src/main/java/org/utplsql/sqldev/model/XMLTools.xtend

@@ -0,0 +1,37 @@
+/* Copyright 2018 Philipp Salvisberg <philipp.salvisberg@trivadis.com>
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.utplsql.sqldev.model
+
+import javax.xml.xpath.XPathConstants
+import javax.xml.xpath.XPathFactory
+import org.w3c.dom.Node
+import org.w3c.dom.NodeList
+
+class XMLTools {
+	val xpathFactory = XPathFactory.newInstance()
+	val xpath = xpathFactory.newXPath()
+		
+	def getNodeList(Node doc, String xpathString) {
+		val expr = xpath.compile(xpathString);
+		val NodeList nodeList = expr.evaluate(doc, XPathConstants.NODESET) as NodeList
+		return nodeList 
+	}
+	
+	def getNode(Node doc, String xpathString) {
+		val expr = xpath.compile(xpathString);
+		val Node node = expr.evaluate(doc, XPathConstants.NODE) as Node
+		return node 
+	}
+}