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+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * 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 benchmarks;
+
+import com.google.caliper.Param;
+import com.google.caliper.Runner;
+import com.google.caliper.SimpleBenchmark;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.util.Arrays;
+import java.util.List;
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.xml.sax.Attributes;
+import org.xml.sax.SAXException;
+import org.xml.sax.helpers.DefaultHandler;
+import org.xmlpull.v1.XmlPullParser;
+
+public class XmlParseBenchmark extends SimpleBenchmark {
+
+ @Param String xmlFile;
+ ByteArrayInputStream inputStream;
+
+ static List<String> xmlFileValues = Arrays.asList(
+ "/etc/apns-conf.xml",
+ "/etc/media_profiles.xml",
+ "/etc/permissions/features.xml"
+ );
+
+ private SAXParser saxParser;
+ private DocumentBuilder documentBuilder;
+ private Constructor<? extends XmlPullParser> kxmlConstructor;
+ private Constructor<? extends XmlPullParser> expatConstructor;
+
+ @SuppressWarnings("unchecked")
+ @Override protected void setUp() throws Exception {
+ byte[] xmlBytes = getXmlBytes();
+ inputStream = new ByteArrayInputStream(xmlBytes);
+ inputStream.mark(xmlBytes.length);
+
+ SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
+ saxParser = saxParserFactory.newSAXParser();
+
+ DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
+ documentBuilder = builderFactory.newDocumentBuilder();
+
+ kxmlConstructor = (Constructor) Class.forName("org.kxml2.io.KXmlParser").getConstructor();
+ expatConstructor = (Constructor) Class.forName("org.apache.harmony.xml.ExpatPullParser")
+ .getConstructor();
+ }
+
+ private byte[] getXmlBytes() throws IOException {
+ FileInputStream fileIn = new FileInputStream(xmlFile);
+ ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
+ int count;
+ byte[] buffer = new byte[1024];
+ while ((count = fileIn.read(buffer)) != -1) {
+ bytesOut.write(buffer, 0, count);
+ }
+ fileIn.close();
+ return bytesOut.toByteArray();
+ }
+
+ public int timeSax(int reps) throws IOException, SAXException {
+ int elementCount = 0;
+ for (int i = 0; i < reps; i++) {
+ inputStream.reset();
+ ElementCounterSaxHandler elementCounterSaxHandler = new ElementCounterSaxHandler();
+ saxParser.parse(inputStream, elementCounterSaxHandler);
+ elementCount += elementCounterSaxHandler.elementCount;
+ }
+ return elementCount;
+ }
+
+ private static class ElementCounterSaxHandler extends DefaultHandler {
+ int elementCount = 0;
+ @Override public void startElement(String uri, String localName,
+ String qName, Attributes attributes) {
+ elementCount++;
+ }
+ }
+
+ public int timeDom(int reps) throws IOException, SAXException {
+ int elementCount = 0;
+ for (int i = 0; i < reps; i++) {
+ inputStream.reset();
+ Document document = documentBuilder.parse(inputStream);
+ elementCount += countDomElements(document.getDocumentElement());
+ }
+ return elementCount;
+ }
+
+ private int countDomElements(Node node) {
+ int result = 0;
+ for (; node != null; node = node.getNextSibling()) {
+ if (node.getNodeType() == Node.ELEMENT_NODE) {
+ result++;
+ }
+ result += countDomElements(node.getFirstChild());
+ }
+ return result;
+ }
+
+ public int timeExpat(int reps) throws Exception {
+ return testXmlPull(expatConstructor, reps);
+ }
+
+ public int timeKxml(int reps) throws Exception {
+ return testXmlPull(kxmlConstructor, reps);
+ }
+
+ private int testXmlPull(Constructor<? extends XmlPullParser> constructor, int reps)
+ throws Exception {
+ int elementCount = 0;
+ for (int i = 0; i < reps; i++) {
+ inputStream.reset();
+ XmlPullParser xmlPullParser = constructor.newInstance();
+ xmlPullParser.setInput(inputStream, "UTF-8");
+ int type;
+ while ((type = xmlPullParser.next()) != XmlPullParser.END_DOCUMENT) {
+ if (type == XmlPullParser.START_TAG) {
+ elementCount++;
+ }
+ }
+ }
+ return elementCount;
+ }
+
+ public static void main(String[] args) {
+ Runner.main(XmlParseBenchmark.class, args);
+ }
+}