From fe00a182a77d2327161dc2021a138d687e3c999c Mon Sep 17 00:00:00 2001
From: Josh Micich <josh@apache.org>
Date: Mon, 26 Oct 2009 19:08:54 +0000
Subject: [PATCH] simplified code copied from xalan (in r829781) to bare
 minimum required by XSSFImportFromXML

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@829903 13f79535-47bb-0310-9956-ffa450edef68
---
 .../poi/xssf/extractor/XSSFImportFromXML.java | 112 +++++++++----
 .../org/apache/xml/utils/PrefixResolver.java  |  72 ---------
 .../xml/utils/PrefixResolverDefault.java      | 147 ------------------
 3 files changed, 82 insertions(+), 249 deletions(-)
 delete mode 100644 src/ooxml/java/org/apache/xml/utils/PrefixResolver.java
 delete mode 100644 src/ooxml/java/org/apache/xml/utils/PrefixResolverDefault.java

diff --git a/src/ooxml/java/org/apache/poi/xssf/extractor/XSSFImportFromXML.java b/src/ooxml/java/org/apache/poi/xssf/extractor/XSSFImportFromXML.java
index e3ddc3fb7..854dc305b 100644
--- a/src/ooxml/java/org/apache/poi/xssf/extractor/XSSFImportFromXML.java
+++ b/src/ooxml/java/org/apache/poi/xssf/extractor/XSSFImportFromXML.java
@@ -39,16 +39,15 @@ import org.apache.poi.xssf.usermodel.XSSFMap;
 import org.apache.poi.xssf.usermodel.XSSFRow;
 import org.apache.poi.xssf.usermodel.helpers.XSSFSingleXmlCell;
 import org.apache.poi.xssf.usermodel.helpers.XSSFXmlColumnPr;
-import org.apache.xml.utils.PrefixResolver;
-import org.apache.xml.utils.PrefixResolverDefault;
 import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NamedNodeMap;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 import org.xml.sax.InputSource;
 import org.xml.sax.SAXException;
 
 /**
- * 
  * Imports data from an external XML to an XLSX according to one of the mappings
  * defined.The output XML Schema must respect this limitations:
  * <ul>
@@ -59,21 +58,21 @@ import org.xml.sax.SAXException;
  */
 public class XSSFImportFromXML {
 
-    private XSSFMap map;
+    private final XSSFMap _map;
 
     private static POILogger logger = POILogFactory.getLogger(XSSFImportFromXML.class);
 
     public XSSFImportFromXML(XSSFMap map) {
-        this.map = map;
+        _map = map;
     }
 
     /**
      * Imports an XML into the XLSX using the Custom XML mapping defined
-     * 
+     *
      * @param xmlInputString the XML to import
      * @throws SAXException if error occurs during XML parsing
      * @throws XPathExpressionException if error occurs during XML navigation
-     * @throws ParserConfigurationException if there are problems with XML parser configuration 
+     * @throws ParserConfigurationException if there are problems with XML parser configuration
      * @throws IOException  if there are problems reading the input string
      */
     public void importFromXML(String xmlInputString) throws SAXException, XPathExpressionException, ParserConfigurationException, IOException {
@@ -84,9 +83,9 @@ public class XSSFImportFromXML {
 
         Document doc = builder.parse(new InputSource(new StringReader(xmlInputString.trim())));
 
-        List<XSSFSingleXmlCell> singleXmlCells = map.getRelatedSingleXMLCell();
+        List<XSSFSingleXmlCell> singleXmlCells = _map.getRelatedSingleXMLCell();
 
-        List<Table> tables = map.getRelatedTables();
+        List<Table> tables = _map.getRelatedTables();
 
         XPathFactory xpathFactory = XPathFactory.newInstance();
         XPath xpath = xpathFactory.newXPath();
@@ -94,25 +93,7 @@ public class XSSFImportFromXML {
         // Setting namespace context to XPath
         // Assuming that the namespace prefix in the mapping xpath is the
         // same as the one used in the document
-        final PrefixResolver resolver = new PrefixResolverDefault(doc.getDocumentElement());
-
-        NamespaceContext ctx = new NamespaceContext() {
-
-            public String getNamespaceURI(String prefix) {
-                return resolver.getNamespaceForPrefix(prefix);
-            }
-
-            // Dummy implementation - not used!
-            public Iterator getPrefixes(String val) {
-                return null;
-            }
-
-            // Dummy implemenation - not used!
-            public String getPrefix(String uri) {
-                return null;
-            }
-        };
-        xpath.setNamespaceContext(ctx);
+        xpath.setNamespaceContext(new DefaultNamespaceContext(doc));
 
         for (XSSFSingleXmlCell singleXmlCell : singleXmlCells) {
 
@@ -165,12 +146,83 @@ public class XSSFImportFromXML {
                     logger.log(POILogger.DEBUG, "Setting '" + value + "' to cell " + cell.getColumnIndex() + "-" + cell.getRowIndex() + " in sheet "
                                                     + table.getXSSFSheet().getSheetName());
                     cell.setCellValue(value.trim());
-
                 }
-
             }
+        }
+    }
 
+    private static final class DefaultNamespaceContext implements NamespaceContext {
+        /**
+         * Node from which to start searching for a xmlns attribute that binds a
+         * prefix to a namespace.
+         */
+        private final Element _docElem;
+
+        public DefaultNamespaceContext(Document doc) {
+            _docElem = doc.getDocumentElement();
         }
 
+        public String getNamespaceURI(String prefix) {
+            return getNamespaceForPrefix(prefix);
+        }
+
+        /**
+         * @param prefix Prefix to resolve.
+         * @return uri of Namespace that prefix resolves to, or
+         *         <code>null</code> if specified prefix is not bound.
+         */
+        private String getNamespaceForPrefix(String prefix) {
+
+            // Code adapted from Xalan's org.apache.xml.utils.PrefixResolverDefault.getNamespaceForPrefix()
+
+            if (prefix.equals("xml")) {
+                return "http://www.w3.org/XML/1998/namespace";
+            }
+
+            Node parent = _docElem;
+
+            while (parent != null) {
+
+                int type = parent.getNodeType();
+                if (type == Node.ELEMENT_NODE) {
+                    if (parent.getNodeName().startsWith(prefix + ":")) {
+                        return parent.getNamespaceURI();
+                    }
+                    NamedNodeMap nnm = parent.getAttributes();
+
+                    for (int i = 0; i < nnm.getLength(); i++) {
+                        Node attr = nnm.item(i);
+                        String aname = attr.getNodeName();
+                        boolean isPrefix = aname.startsWith("xmlns:");
+
+                        if (isPrefix || aname.equals("xmlns")) {
+                            int index = aname.indexOf(':');
+                            String p = isPrefix ? aname.substring(index + 1) : "";
+
+                            if (p.equals(prefix)) {
+                                return attr.getNodeValue();
+                            }
+                        }
+                    }
+                } else if (type == Node.ENTITY_REFERENCE_NODE) {
+                    continue;
+                } else {
+                    break;
+                }
+                parent = parent.getParentNode();
+            }
+
+            return null;
+        }
+
+        // Dummy implementation - not used!
+        public Iterator getPrefixes(String val) {
+            return null;
+        }
+
+        // Dummy implementation - not used!
+        public String getPrefix(String uri) {
+            return null;
+        }
     }
 }
diff --git a/src/ooxml/java/org/apache/xml/utils/PrefixResolver.java b/src/ooxml/java/org/apache/xml/utils/PrefixResolver.java
deleted file mode 100644
index a9fcd87cc..000000000
--- a/src/ooxml/java/org/apache/xml/utils/PrefixResolver.java
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * 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.xml.utils;
-
-/**
- * The class that implements this interface can resolve prefixes to
- * namespaces. Examples would include resolving the meaning of a
- * prefix at a particular point in a document, or mapping the prefixes
- * used in an XPath expression.
- * @xsl.usage advanced
- */
-public interface PrefixResolver
-{
-
-  /**
-   * Given a namespace, get the corrisponding prefix.  This assumes that
-   * the PrefixResolver holds its own namespace context, or is a namespace
-   * context itself.
-   *
-   * @param prefix The prefix to look up, which may be an empty string ("") for the default Namespace.
-   *
-   * @return The associated Namespace URI, or null if the prefix
-   *         is undeclared in this context.
-   */
-  String getNamespaceForPrefix(String prefix);
-
-  /**
-   * Given a namespace, get the corresponding prefix, based on the context node.
-   *
-   * @param prefix The prefix to look up, which may be an empty string ("") for the default Namespace.
-   * @param context The node context from which to look up the URI.
-   *
-   * @return The associated Namespace URI as a string, or null if the prefix
-   *         is undeclared in this context.
-   */
-  String getNamespaceForPrefix(String prefix, org.w3c.dom.Node context);
-
-  /**
-   * Return the base identifier.
-   *
-   * @return The base identifier from where relative URIs should be absolutized, or null 
-   * if the base ID is unknown.
-   * <p>
-   * CAVEAT: Note that the base URI in an XML document may vary with where
-   * you are in the document, if part of the doc's contents were brought in
-   * via an external entity reference or if mechanisms such as xml:base have
-   * been used. Unless this PrefixResolver is bound to a specific portion of
-   * the document, or has been kept up to date via some other mechanism, it
-   * may not accurately reflect that context information.
-   */
-  public String getBaseIdentifier();
-  
-  public boolean handlesNullPrefixes();
-}
diff --git a/src/ooxml/java/org/apache/xml/utils/PrefixResolverDefault.java b/src/ooxml/java/org/apache/xml/utils/PrefixResolverDefault.java
deleted file mode 100644
index df519d675..000000000
--- a/src/ooxml/java/org/apache/xml/utils/PrefixResolverDefault.java
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
- * 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.xml.utils;
-
-import org.w3c.dom.NamedNodeMap;
-import org.w3c.dom.Node;
-
-/**
- * This class implements a generic PrefixResolver that
- * can be used to perform prefix-to-namespace lookup
- * for the XPath object.
- * @xsl.usage general
- */
-public class PrefixResolverDefault implements PrefixResolver
-{
-
-  public static final java.lang.String S_XMLNAMESPACEURI = "http://www.w3.org/XML/1998/namespace";
-
-  /**
-   * The context to resolve the prefix from, if the context
-   * is not given.
-   */
-  Node m_context;
-
-  /**
-   * Construct a PrefixResolverDefault object.
-   * @param xpathExpressionContext The context from
-   * which XPath expression prefixes will be resolved.
-   * Warning: This will not work correctly if xpathExpressionContext
-   * is an attribute node.
-   */
-  public PrefixResolverDefault(Node xpathExpressionContext)
-  {
-    m_context = xpathExpressionContext;
-  }
-
-  /**
-   * Given a namespace, get the corrisponding prefix.  This assumes that
-   * the PrevixResolver hold's it's own namespace context, or is a namespace
-   * context itself.
-   * @param prefix Prefix to resolve.
-   * @return Namespace that prefix resolves to, or null if prefix
-   * is not bound.
-   */
-  public String getNamespaceForPrefix(String prefix)
-  {
-    return getNamespaceForPrefix(prefix, m_context);
-  }
-
-  /**
-   * Given a namespace, get the corrisponding prefix.
-   * Warning: This will not work correctly if namespaceContext
-   * is an attribute node.
-   * @param prefix Prefix to resolve.
-   * @param namespaceContext Node from which to start searching for a
-   * xmlns attribute that binds a prefix to a namespace.
-   * @return Namespace that prefix resolves to, or null if prefix
-   * is not bound.
-   */
-  public String getNamespaceForPrefix(String prefix,
-                                      org.w3c.dom.Node namespaceContext)
-  {
-
-    Node parent = namespaceContext;
-    String namespace = null;
-
-    if (prefix.equals("xml"))
-    {
-      namespace = S_XMLNAMESPACEURI;
-    }
-    else
-    {
-      int type;
-
-      while ((null != parent) && (null == namespace)
-             && (((type = parent.getNodeType()) == Node.ELEMENT_NODE)
-                 || (type == Node.ENTITY_REFERENCE_NODE)))
-      {
-        if (type == Node.ELEMENT_NODE)
-        {
-                if (parent.getNodeName().indexOf(prefix+":") == 0) 
-                        return parent.getNamespaceURI();                
-          NamedNodeMap nnm = parent.getAttributes();
-
-          for (int i = 0; i < nnm.getLength(); i++)
-          {
-            Node attr = nnm.item(i);
-            String aname = attr.getNodeName();
-            boolean isPrefix = aname.startsWith("xmlns:");
-
-            if (isPrefix || aname.equals("xmlns"))
-            {
-              int index = aname.indexOf(':');
-              String p = isPrefix ? aname.substring(index + 1) : "";
-
-              if (p.equals(prefix))
-              {
-                namespace = attr.getNodeValue();
-
-                break;
-              }
-            }
-          }
-        }
-
-        parent = parent.getParentNode();
-      }
-    }
-
-    return namespace;
-  }
-
-  /**
-   * Return the base identifier.
-   *
-   * @return null
-   */
-  public String getBaseIdentifier()
-  {
-    return null;
-  }
-        /**
-         * @see PrefixResolver#handlesNullPrefixes()
-         */
-        public boolean handlesNullPrefixes() {
-                return false;
-        }
-
-}