1 files changed, 112 insertions, 0 deletions
diff --git a/web/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/util/CommonXML.java b/web/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/util/CommonXML.java
new file mode 100644
index 0000000000..8d685f3900
--- /dev/null
+++ b/web/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/util/CommonXML.java
@@ -0,0 +1,112 @@
+/*******************************************************************************
+ * Copyright (c) 2004, 2017 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jst.jsp.core.internal.util;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Source;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.TransformerFactoryConfigurationError;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+
+import org.eclipse.jst.jsp.core.internal.Logger;
+import org.w3c.dom.Document;
+import org.xml.sax.EntityResolver;
+import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
+
+public class CommonXML {
+
+	public synchronized static DocumentBuilder getDocumentBuilder() {
+		DocumentBuilder result = null;
+		try {
+			DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
+			documentBuilderFactory.setExpandEntityReferences(false);
+
+			result = documentBuilderFactory.newDocumentBuilder();
+			result.setEntityResolver(getEntityResolver());
+		}
+		catch (ParserConfigurationException e) {
+			Logger.logException(e);
+		}
+		return result;
+	}
+
+	public synchronized static DocumentBuilder getDocumentBuilder(boolean validating) {
+		DocumentBuilder result = null;
+		try {
+			DocumentBuilderFactory instance = DocumentBuilderFactory.newInstance();
+
+			instance.setValidating(validating);
+			instance.setExpandEntityReferences(false);
+			instance.setCoalescing(true);
+			result = instance.newDocumentBuilder();
+			if (!validating) {
+				result.setEntityResolver(getEntityResolver());
+			}
+		}
+		catch (ParserConfigurationException e) {
+			Logger.logException(e);
+		}
+		return result;
+	}
+
+	public static void serialize(Document document, OutputStream ostream) throws IOException {
+		Source domSource = new DOMSource(document);
+		try {
+			Transformer serializer = TransformerFactory.newInstance().newTransformer();
+			try {
+				serializer.setOutputProperty(OutputKeys.INDENT, "yes"); //$NON-NLS-1$
+				serializer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4"); //$NON-NLS-1$ //$NON-NLS-2$
+				serializer.setOutputProperty(OutputKeys.ENCODING, "UTF-16"); //$NON-NLS-1$
+			}
+			catch (IllegalArgumentException e) {
+				// unsupported properties
+			}
+			serializer.transform(domSource, new StreamResult(ostream));
+		}
+		catch (TransformerConfigurationException e) {
+			throw new IOException(e.getMessage());
+		}
+		catch (TransformerFactoryConfigurationError e) {
+			throw new IOException(e.getMessage());
+		}
+		catch (TransformerException e) {
+			throw new IOException(e.getMessage());
+		}
+	}
+
+	/**
+	 * Returns an EntityResolver that won't try to load and resolve ANY
+	 * entities
+	 */
+	private static EntityResolver getEntityResolver() {
+		EntityResolver resolver = new EntityResolver() {
+			public InputSource resolveEntity(String publicID, String systemID) throws SAXException, IOException {
+				InputSource 					result = new InputSource(new ByteArrayInputStream(new byte[0]));
+				result.setPublicId(publicID);
+				result.setSystemId(systemID != null ? systemID : "/_" + getClass().getName()); //$NON-NLS-1$
+				return result;
+			}
+		};
+		return resolver;
+	}
+}