--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/visualizer/Data/src/com/sun/hotspot/igv/data/serialization/XMLParser.java	Tue Feb 07 22:41:09 2012 +0100
@@ -0,0 +1,270 @@
+/*
+ * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+package com.sun.hotspot.igv.data.serialization;
+
+import com.sun.hotspot.igv.data.Properties;
+import java.util.HashMap;
+import java.util.Stack;
+import org.xml.sax.Attributes;
+import org.xml.sax.ContentHandler;
+import org.xml.sax.Locator;
+import org.xml.sax.SAXException;
+
+/**
+ *
+ * @author Thomas Wuerthinger
+ */
+public class XMLParser implements ContentHandler {
+
+    public static interface ParseMonitor {
+
+        public void setProgress(double d);
+
+        public void setState(String state);
+    }
+
+    public static class MissingAttributeException extends SAXException {
+
+        private String name;
+
+        public MissingAttributeException(String name) {
+            super("Missing attribute \"" + name + "\"");
+            this.name = name;
+        }
+
+        public String getAttributeName() {
+            return this.getMessage();
+        }
+    }
+
+    public static class HandoverElementHandler<P> extends ElementHandler<P, P> {
+
+        @Override
+        protected P start() throws SAXException {
+            return getParentObject();
+        }
+
+        public HandoverElementHandler(String name) {
+            super(name);
+        }
+
+        public HandoverElementHandler(String name, boolean needsText) {
+            super(name, needsText);
+        }
+    }
+
+    public static class TopElementHandler<P> extends ElementHandler<P, Object> {
+
+        public TopElementHandler() {
+            super(null);
+        }
+    }
+
+    public static class ElementHandler<T, P> {
+
+        private String name;
+        private Stack<T> object = new Stack<>();
+        private Attributes attr;
+        private StringBuilder currentText;
+        private ParseMonitor monitor;
+        private HashMap<String, ElementHandler<?, ? super T>> hashtable;
+        private boolean needsText;
+        private Stack<ElementHandler<P, ?>> parentElement = new Stack<>();
+        private Stack<P> parentObject = new Stack<>();
+
+        public ElementHandler(String name) {
+            this(name, false);
+        }
+
+        public ElementHandler<P, ?> getParentElement() {
+            return parentElement.peek();
+        }
+
+        public P getParentObject() {
+            return parentObject.peek();
+        }
+
+        protected boolean needsText() {
+            return needsText;
+        }
+
+        public ElementHandler(String name, boolean needsText) {
+            this.hashtable = new HashMap<>();
+            this.name = name;
+            this.needsText = needsText;
+        }
+
+        public ParseMonitor getMonitor() {
+            return monitor;
+        }
+
+        public ElementHandler<?, ? super T> getChild(String name) {
+            return hashtable.get(name);
+        }
+
+        public void addChild(ElementHandler<?, ? super T> handler) {
+            assert handler != null;
+            hashtable.put(handler.getName(), handler);
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public T getObject() {
+            return object.size() == 0 ? null : object.peek();
+        }
+
+        public String readAttribute(String name) {
+            return attr.getValue(name);
+        }
+
+        public String readRequiredAttribute(String name) throws SAXException {
+            String s = readAttribute(name);
+            if (s == null) {
+                throw new MissingAttributeException(name);
+            }
+            return s;
+        }
+
+        public void processAttributesAsProperties(Properties p) {
+            int length = attr.getLength();
+            for (int i = 0; i < length; i++) {
+                String val = attr.getValue(i);
+                String localName = attr.getLocalName(i);
+                p.setProperty(val, localName);
+            }
+        }
+
+        public void startElement(ElementHandler<P, ?> parentElement, Attributes attr, ParseMonitor monitor) throws SAXException {
+            this.currentText = new StringBuilder();
+            this.attr = attr;
+            this.monitor = monitor;
+            this.parentElement.push(parentElement);
+            parentObject.push(parentElement.getObject());
+            object.push(start());
+        }
+
+        protected T start() throws SAXException {
+            return null;
+        }
+
+        protected void end(String text) throws SAXException {
+
+        }
+
+        public void endElement() throws SAXException {
+            end(currentText.toString());
+            object.pop();
+            parentElement.pop();
+            parentObject.pop();
+        }
+
+        protected void text(char[] c, int start, int length) {
+            assert currentText != null;
+            currentText.append(c, start, length);
+        }
+    }
+    private Stack<ElementHandler> stack;
+    private ParseMonitor monitor;
+
+    public XMLParser(TopElementHandler rootHandler, ParseMonitor monitor) {
+        this.stack = new Stack<>();
+        this.monitor = monitor;
+        this.stack.push(rootHandler);
+    }
+
+    @Override
+    public void setDocumentLocator(Locator locator) {
+        if (monitor != null) {
+            monitor.setState("Starting parsing");
+        }
+    }
+
+    @Override
+    public void startDocument() throws SAXException {
+    }
+
+    @Override
+    public void endDocument() throws SAXException {
+    }
+
+    @Override
+    public void startPrefixMapping(String prefix, String uri) throws SAXException {
+    }
+
+    @Override
+    public void endPrefixMapping(String prefix) throws SAXException {
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
+        assert !stack.isEmpty();
+
+        ElementHandler parent = stack.peek();
+        if (parent != null) {
+            ElementHandler child = parent.getChild(qName);
+            if (child != null) {
+                child.startElement(parent, atts, monitor);
+                stack.push(child);
+                return;
+            }
+        }
+
+        stack.push(null);
+    }
+
+    @Override
+    public void endElement(String uri, String localName, String qName) throws SAXException {
+        ElementHandler handler = stack.pop();
+        if (handler != null) {
+            handler.endElement();
+        }
+    }
+
+    @Override
+    public void characters(char[] ch, int start, int length) throws SAXException {
+
+        assert !stack.isEmpty();
+
+
+        ElementHandler top = stack.peek();
+        if (top != null && top.needsText()) {
+            top.text(ch, start, length);
+        }
+    }
+
+    @Override
+    public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
+    }
+
+    @Override
+    public void processingInstruction(String target, String data) throws SAXException {
+    }
+
+    @Override
+    public void skippedEntity(String name) throws SAXException {
+    }
+}