From e9305c4e70d3537b0e82997c612ad001cb3c4513 Mon Sep 17 00:00:00 2001
From: Manolo Carrasco <manolo@apache.org>
Date: Sun, 28 Aug 2011 00:40:20 +0000
Subject: [PATCH] gwt 2.0.1 does not have shared RegExp

---
 .../rebind/SelectorGeneratorCssToXPath.java   | 112 ++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 gwtquery-core-2.0.1/src/main/java/com/google/gwt/query/rebind/SelectorGeneratorCssToXPath.java

diff --git a/gwtquery-core-2.0.1/src/main/java/com/google/gwt/query/rebind/SelectorGeneratorCssToXPath.java b/gwtquery-core-2.0.1/src/main/java/com/google/gwt/query/rebind/SelectorGeneratorCssToXPath.java
new file mode 100644
index 00000000..04028ef0
--- /dev/null
+++ b/gwtquery-core-2.0.1/src/main/java/com/google/gwt/query/rebind/SelectorGeneratorCssToXPath.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2011, The gwtquery team.
+ * 
+ * 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 com.google.gwt.query.rebind;
+
+import java.util.ArrayList;
+import java.util.regex.MatchResult;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFactory;
+
+import com.google.gwt.core.ext.TreeLogger;
+import com.google.gwt.core.ext.UnableToCompleteException;
+import com.google.gwt.core.ext.typeinfo.JMethod;
+import com.google.gwt.query.client.Selector;
+import com.google.gwt.query.client.impl.SelectorEngineCssToXPath;
+import com.google.gwt.query.client.impl.SelectorEngineCssToXPath.ReplaceCallback;
+import com.google.gwt.query.client.impl.SelectorEngineCssToXPath.Replacer;
+import com.google.gwt.user.rebind.SourceWriter;
+
+/**
+ * Compile time selector generator which translates selector into XPath at
+ * compile time. It Uses the SelectorEngineCssToXpath to produce the xpath
+ * selectors
+ */
+public class SelectorGeneratorCssToXPath extends SelectorGeneratorBase {
+
+  /**
+   * The replacer implementation for the JVM.
+   */
+  public static final Replacer replacerJvm = new Replacer() {
+    public String replaceAll(String s, String r, Object o) {
+      Pattern p = Pattern.compile(r);
+      if (o instanceof ReplaceCallback) {
+        final Matcher matcher = p.matcher(s);
+        ReplaceCallback callback = (ReplaceCallback) o;
+        while (matcher.find()) {
+          final MatchResult matchResult = matcher.toMatchResult();
+          ArrayList<String> argss = new ArrayList<String>();
+          for (int i = 0; i < matchResult.groupCount() + 1; i++) {
+            argss.add(matchResult.group(i));
+          }
+          final String replacement = callback.foundMatch(argss);
+          s = s.substring(0, matchResult.start()) + replacement
+              + s.substring(matchResult.end());
+          matcher.reset(s);
+        }
+        return s;
+      } else {
+        return p.matcher(s).replaceAll(o.toString());
+      }
+    }
+  };
+
+  public static final Replacer replacer = replacerJvm;
+
+  private SelectorEngineCssToXPath engine = new SelectorEngineCssToXPath(
+      replacer);
+
+  protected String css2Xpath(String s) {
+    return engine.css2Xpath(s);
+  }
+
+  private XPathFactory factory = XPathFactory.newInstance();
+  private XPath xpath = factory.newXPath();
+
+  protected void generateMethodBody(SourceWriter sw, JMethod method,
+      TreeLogger treeLogger, boolean hasContext)
+      throws UnableToCompleteException {
+
+    String selector = method.getAnnotation(Selector.class).value();
+    String xselector = css2Xpath(selector);
+
+    // Validate the generated xpath selector.
+    try {
+      validateXpath(xselector);
+    } catch (XPathExpressionException e1) {
+      System.err.println("Invalid XPath generated selector, please revise it: " + xselector);
+      if (!selector.equals(xselector)) {
+        System.err.println("If your css2 selector syntax is correct, open an issue in the gwtquery project. cssselector:"
+            + selector + " xpath:" + xselector);
+      }
+      throw new UnableToCompleteException();
+    }
+
+    sw.println("return "
+        + wrap(method, "xpathEvaluate(\"" + xselector + "\", root)") + ";");
+  }
+  
+  public void validateXpath(String xselector) throws XPathExpressionException {
+    xpath.compile(xselector);
+  }
+
+  protected String getImplSuffix() {
+    return "CssToXPath" + super.getImplSuffix();
+  }
+}
-- 
2.39.5