test saxon and invite XPath2.0 support

pom.xml

@@ -27,6 +27,11 @@
                 <artifactId>httpclient</artifactId>
                 <version>4.2.4</version>
             </dependency>
+            <dependency>
+                <groupId>net.sf.saxon</groupId>
+                <artifactId>Saxon-HE</artifactId>
+                <version>9.5.1-1</version>
+            </dependency>
             <dependency>
                 <groupId>log4j</groupId>
                 <artifactId>log4j</artifactId>
@@ -45,7 +50,7 @@
             <dependency>
                 <groupId>net.sourceforge.htmlcleaner</groupId>
                 <artifactId>htmlcleaner</artifactId>
-                <version>2.4</version>
+                <version>2.5</version>
             </dependency>
             <dependency>
                 <groupId>org.apache.commons</groupId>

webmagic-core/pom.xml

@@ -27,6 +27,11 @@
             <artifactId>commons-lang3</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>net.sf.saxon</groupId>
+            <artifactId>Saxon-HE</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>

webmagic-core/src/test/java/us/codecraft/webmagic/selector/SaxonTest.java

+package us.codecraft.webmagic.selector;
+
+import net.sf.saxon.xpath.XPathFactoryImpl;
+import org.htmlcleaner.CleanerProperties;
+import org.htmlcleaner.DomSerializer;
+import org.htmlcleaner.HtmlCleaner;
+import org.htmlcleaner.TagNode;
+import org.junit.Test;
+import org.w3c.dom.Document;
+import org.w3c.dom.NodeList;
+
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathConstants;
+import javax.xml.xpath.XPathExpression;
+import javax.xml.xpath.XPathFactoryConfigurationException;
+
+/**
+ * @author yihua.huang@dianping.com <br>
+ * @date: 13-8-2 <br>
+ * Time: 下午5:48 <br>
+ */
+public class SaxonTest {
+
+    @Test
+    public void test() throws XPathFactoryConfigurationException {
+//        System.setProperty("javax.xml.xpath.XPathFactory:" + NamespaceConstant.OBJECT_MODEL_SAXON, "net.sf.saxon.xpath.XPathFactoryImpl");
+//        XPathFactory xpf = XPathFactory.newInstance(NamespaceConstant.OBJECT_MODEL_SAXON);
+        String xml = "<root><a>#BBB#</a><a>#CCC#</a><b><a>#DDD#</a></b></root>";
+        try {
+            HtmlCleaner htmlCleaner = new HtmlCleaner();
+            TagNode tagNode = htmlCleaner.clean("");
+            Document document = new DomSerializer(new CleanerProperties()).createDOM(tagNode);
+
+            javax.xml.xpath.XPathFactory factory = XPathFactoryImpl.newInstance();
+            XPath xpath = factory.newXPath();
+            XPathExpression expr = xpath.compile("//a[matches(.,'#...#')]");
+
+            Object result = expr.evaluate(document, XPathConstants.NODESET);
+            NodeList nodes = (NodeList) result;
+            System.out.println(nodes);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}

webmagic-core/src/test/java/us/codecraft/webmagic/selector/XpathSelectorTest.java

 package us.codecraft.webmagic.selector;
 
+import net.sf.saxon.Configuration;
+import net.sf.saxon.lib.NamespaceConstant;
+import net.sf.saxon.om.NamespaceResolver;
+import net.sf.saxon.pull.NamespaceContextImpl;
+import net.sf.saxon.xpath.JAXPXPathStaticContext;
+import net.sf.saxon.xpath.XPathEvaluator;
+import net.sf.saxon.xpath.XPathFactoryImpl;
+import org.htmlcleaner.CleanerProperties;
+import org.htmlcleaner.DomSerializer;
+import org.htmlcleaner.HtmlCleaner;
+import org.htmlcleaner.TagNode;
 import org.junit.Assert;
 import org.junit.Test;
+import org.w3c.dom.Document;
+import org.w3c.dom.NodeList;
+
+import javax.xml.xpath.*;
+import java.util.Collections;
+import java.util.Iterator;
 
 /**
  * @author code4crafter@gmail.com <br> Date: 13-4-21 Time: 上午10:06
@@ -1354,4 +1371,50 @@ public class XpathSelectorTest {
         Assert.assertNotNull(html1.$("a[href]").xpath("//@href").all());
     }
 
+    @Test
+    public void testXPath2() {
+        String text = "<h1>眉山：扎实推进农业农村工作 促农持续增收<br>\n" +
+                "<span>2013-07-31 23:29:45&nbsp;&nbsp;&nbsp;来源：<a href=\"http://www.mshw.net\" target=\"_blank\" style=\"color:#AAA\">眉山网</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;责任编辑：张斯炜</span></h1>";
+        XpathSelector xpathSelector = new XpathSelector("//h1/text()");
+        System.out.println(xpathSelector.select(text));
+    }
+
+    //http://sourceforge.net/mailarchive/forum.php?thread_name=4EA92A8A.6080202%40saxonica.com&forum_name=saxon-help
+    @Test
+    public void testSaxon() throws XPathFactoryConfigurationException {
+        System.setProperty("javax.xml.xpath.XPathFactory:" + NamespaceConstant.OBJECT_MODEL_SAXON, "net.sf.saxon.xpath.XPathFactoryImpl");
+        System.setProperty("javax.xml.xpath.XPathFactory:" + NamespaceConstant.FN, "net.sf.saxon.xpath.XPathFactoryImpl");
+        XPathFactory xpf = XPathFactory.newInstance(NamespaceConstant.OBJECT_MODEL_SAXON);
+        String text = "<h1>眉山：扎实推进农业农村工作 促农持续增收<br>\n" +
+                "<span>2013-07-31 23:29:45&nbsp;&nbsp;&nbsp;来源：<a href=\"http://www.mshw.net\" target=\"_blank\" style=\"color:#AAA\">眉山网</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;责任编辑：张斯炜</span></h1>";
+        try {
+            HtmlCleaner htmlCleaner = new HtmlCleaner();
+            TagNode tagNode = htmlCleaner.clean(text);
+            Document document = new DomSerializer(new CleanerProperties()).createDOM(tagNode);
+            javax.xml.xpath.XPathFactory factory = XPathFactoryImpl.newInstance(NamespaceConstant.OBJECT_MODEL_SAXON);
+            Configuration config = Configuration.newConfiguration();
+            XPathEvaluator xPathEvaluator = new XPathEvaluator(config);
+            JAXPXPathStaticContext context = new JAXPXPathStaticContext(config);
+            context.setNamespaceContext(new NamespaceContextImpl(new NamespaceResolver() {
+
+
+                @Override
+                public String getURIForPrefix(String s, boolean b) {
+                    return NamespaceConstant.FN;
+                }
+
+                @Override
+                public Iterator<String> iteratePrefixes() {
+                    return Collections.singletonList("fn").iterator();
+                }
+            }));
+            xPathEvaluator.setStaticContext(context);
+            XPathExpression expr = xPathEvaluator.compile("fn:substring-before(//h1,'\n')");
+            Object result = expr.evaluate(document, XPathConstants.STRING);
+            System.out.println(result);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
 }