1 files changed, 89 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/accessibility/AccessibilityUtil.java b/src/java/org/apache/fop/accessibility/AccessibilityUtil.java
new file mode 100644
index 000000000..0dc5840b6
--- /dev/null
+++ b/src/java/org/apache/fop/accessibility/AccessibilityUtil.java
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/* $Id$ */
+
+package org.apache.fop.accessibility;
+
+import javax.xml.transform.Source;
+import javax.xml.transform.Templates;
+import javax.xml.transform.TransformerConfigurationException;
+import javax.xml.transform.sax.SAXTransformerFactory;
+import javax.xml.transform.stream.StreamSource;
+
+import org.xml.sax.helpers.DefaultHandler;
+
+import org.apache.fop.apps.FOPException;
+import org.apache.fop.apps.FOUserAgent;
+
+/**
+ * Utility class for FOP's accessibility features. It provides the stylesheets used for processing
+ * the incoming XSL-FO stream and for setting up the transformation.
+ */
+public class AccessibilityUtil {
+
+    private static SAXTransformerFactory tfactory
+        = (SAXTransformerFactory)SAXTransformerFactory.newInstance();
+
+    private static Templates addPtrTemplates;
+    private static Templates reduceFOTemplates;
+
+    public static DefaultHandler decorateDefaultHandler(DefaultHandler handler,
+            FOUserAgent userAgent) throws FOPException {
+        DefaultHandler transformNode = new TransformerNodeEndProcessing(
+                getAddPtrTemplates(), handler, userAgent);
+        return transformNode;
+    }
+
+    /**
+     * Returns the addPtr.xsl stylesheet.
+     * @return the addPtr.xsl stylesheet
+     * @throws FOPException if transform fails
+     */
+    public static synchronized Templates getAddPtrTemplates() throws FOPException {
+        if (addPtrTemplates == null) {
+            //Load and cache stylesheet
+            Source src = new StreamSource(
+                    AccessibilityUtil.class.getResource("addPtr.xsl").toExternalForm());
+            try {
+                addPtrTemplates = tfactory.newTemplates(src);
+            } catch (TransformerConfigurationException e) {
+                throw new FOPException(e);
+            }
+        }
+        return addPtrTemplates;
+    }
+
+    /**
+     * Returns the reduceFOTree.xsl stylesheet
+     * @return the reduceFOTree.xsl stylesheet
+     * @throws FOPException if an error occurs loading the stylesheet
+     */
+    public static synchronized Templates getReduceFOTreeTemplates() throws FOPException  {
+        if (reduceFOTemplates == null) {
+            //Load and cache stylesheet
+            Source src = new StreamSource(
+                    AccessibilityUtil.class.getResource("reduceFOTree.xsl").toExternalForm());
+            try {
+                reduceFOTemplates = tfactory.newTemplates(src);
+            } catch (TransformerConfigurationException e) {
+                throw new FOPException(e);
+            }
+        }
+        return reduceFOTemplates;
+    }
+ }
+\ No newline at end of file