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simplified code copied from xalan (in r829781) to bare minimum required by XSSFImportFromXML

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git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@829903 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Josh Micich 2009-10-26 19:08:54 +00:00
parent eb4b1d0aac
commit fe00a182a7
3 changed files with 82 additions and 249 deletions
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112
src/ooxml/java/org/apache/poi/xssf/extractor/XSSFImportFromXML.java
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@ -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;
}
}
}

72
src/ooxml/java/org/apache/xml/utils/PrefixResolver.java
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@ -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();
}

147
src/ooxml/java/org/apache/xml/utils/PrefixResolverDefault.java
View File

@ -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;
}
}