Removed uses of internal JDK classes.
Removed @author tag. Dealt with exceprions properly. General reformatting. git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@827905 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Ugo Cei
parent
ebc7f3cb26
commit
3e82ec8035
@ -21,6 +21,7 @@ import java.io.IOException;
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import java.io.StringReader;
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import java.util.Iterator;
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import java.util.List;
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import javax.xml.namespace.NamespaceContext;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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@ -38,172 +39,138 @@ import org.apache.poi.xssf.usermodel.XSSFMap;
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import org.apache.poi.xssf.usermodel.XSSFRow;
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import org.apache.poi.xssf.usermodel.helpers.XSSFSingleXmlCell;
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import org.apache.poi.xssf.usermodel.helpers.XSSFXmlColumnPr;
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import org.apache.xml.utils.PrefixResolver;
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import org.apache.xml.utils.PrefixResolverDefault;
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import org.w3c.dom.Document;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import org.xml.sax.InputSource;
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import org.xml.sax.SAXException;
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import com.sun.org.apache.xml.internal.utils.PrefixResolver;
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import com.sun.org.apache.xml.internal.utils.PrefixResolverDefault;
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/**
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*
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* Imports data from an external XML to an XLSX to an XML according to one of the mapping defined.
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*
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* The output XML Schema must respect this limitations:
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*
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* - the input XML must be valid according to the XML Schema used in the mapping
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* - denormalized table mapping is not supported (see OpenOffice part 4: chapter 3.5.1.7)
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* - all the namespaces used in the document must be declared in the root node
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*
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*
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* @author Roberto Manicardi
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*
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* Imports data from an external XML to an XLSX according to one of the mappings
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* defined.The output XML Schema must respect this limitations:
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* <ul>
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* <li>the input XML must be valid according to the XML Schema used in the mapping</li>
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* <li>denormalized table mapping is not supported (see OpenOffice part 4: chapter 3.5.1.7)</li>
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* <li>all the namespaces used in the document must be declared in the root node</li>
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* </ul>
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*/
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public class XSSFImportFromXML {
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private XSSFMap map;
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private static POILogger logger = POILogFactory.getLogger(XSSFImportFromXML.class);
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public XSSFImportFromXML(XSSFMap map){
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this.map = map;
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}
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/**
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* Imports an XML into the XLSX using the Custom XML mapping defined
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*
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* @param xmlInputString the XML to import
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* @throws SAXException raised if error occurs during XML parsing
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* @throws XPathExpressionException raised if error occurs during XML navigation
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*/
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public void importFromXML(String xmlInputString) throws SAXException, XPathExpressionException{
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try{
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DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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factory.setNamespaceAware(true);
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DocumentBuilder builder = factory.newDocumentBuilder();
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Document doc = builder.parse(new InputSource(new StringReader(xmlInputString.trim())));
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List<XSSFSingleXmlCell> singleXmlCells = map.getRelatedSingleXMLCell();
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List<Table> tables = map.getRelatedTables();
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XPathFactory xpathFactory = XPathFactory.newInstance();
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XPath xpath = xpathFactory.newXPath();
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// Setting namespace context to XPath
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// Assuming that the namespace prefix in the mapping xpath is the same as the one used in the document
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final PrefixResolver resolver = new PrefixResolverDefault(doc.getDocumentElement());
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NamespaceContext ctx = new NamespaceContext() {
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public String getNamespaceURI(String prefix) {
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return resolver.getNamespaceForPrefix(prefix);
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}
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// Dummy implementation - not used!
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public Iterator getPrefixes(String val) {
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return null;
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}
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// Dummy implemenation - not used!
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public String getPrefix(String uri) {
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return null;
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}
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};
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xpath.setNamespaceContext(ctx);
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private XSSFMap map;
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for(XSSFSingleXmlCell singleXmlCell :singleXmlCells ){
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String xpathString = singleXmlCell.getXpath();
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Node result = (Node) xpath.evaluate(xpathString,doc, XPathConstants.NODE);
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String textContent = result.getTextContent();
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logger.log(POILogger.DEBUG,"Extracting with xpath "+xpathString+" : value is '"+textContent+"'");
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XSSFCell cell = singleXmlCell.getReferencedCell();
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logger.log(POILogger.DEBUG,"Setting '"+textContent+"' to cell "+cell.getColumnIndex()+"-"+cell.getRowIndex()+" in sheet "+cell.getSheet().getSheetName());
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cell.setCellValue(textContent);
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}
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for(Table table : tables){
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String commonXPath = table.getCommonXpath();
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NodeList result = (NodeList) xpath.evaluate(commonXPath,doc, XPathConstants.NODESET);
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int rowOffset = table.getStartCellReference().getRow()+1;//the first row contains the table header
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int columnOffset = table.getStartCellReference().getCol()-1;
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for(int i = 0; i< result.getLength();i++){
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// TODO: implement support for denormalized XMLs (see OpenOffice part 4: chapter 3.5.1.7)
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for(XSSFXmlColumnPr xmlColumnPr: table.getXmlColumnPrs()){
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int localColumnId = (int)xmlColumnPr.getId();
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int rowId = rowOffset+i;
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int columnId = columnOffset+localColumnId;
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String localXPath = xmlColumnPr.getLocalXPath();
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localXPath = localXPath.substring(localXPath.substring(1).indexOf('/')+1);
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// Build an XPath to select the right node (assuming that the commonXPath != "/")
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String nodeXPath = commonXPath+"["+(i+1)+"]"+localXPath;
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// TODO: convert the data to the cell format
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String value = (String) xpath.evaluate(nodeXPath,result.item(i), XPathConstants.STRING);
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logger.log(POILogger.DEBUG,"Extracting with xpath "+nodeXPath+" : value is '"+value+"'");
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XSSFRow row = table.getXSSFSheet().getRow(rowId);
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if(row==null){
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row = table.getXSSFSheet().createRow(rowId);
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}
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XSSFCell cell = row.getCell(columnId);
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if(cell==null){
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cell = row.createCell(columnId);
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}
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logger.log(POILogger.DEBUG,"Setting '"+value+"' to cell "+cell.getColumnIndex()+"-"+cell.getRowIndex()+" in sheet "+table.getXSSFSheet().getSheetName());
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cell.setCellValue(value.trim());
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}
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}
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}
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}catch(IOException e){
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//Thrown by StringReader
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e.printStackTrace();
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}catch(ParserConfigurationException e){
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//Thrown by DocumentBuilderFactory
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e.printStackTrace();
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}
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}
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private static POILogger logger = POILogFactory.getLogger(XSSFImportFromXML.class);
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public XSSFImportFromXML(XSSFMap map) {
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this.map = map;
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}
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/**
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* Imports an XML into the XLSX using the Custom XML mapping defined
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*
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* @param xmlInputString the XML to import
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* @throws SAXException if error occurs during XML parsing
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* @throws XPathExpressionException if error occurs during XML navigation
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* @throws ParserConfigurationException if there are problems with XML parser configuration
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* @throws IOException if there are problems reading the input string
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*/
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public void importFromXML(String xmlInputString) throws SAXException, XPathExpressionException, ParserConfigurationException, IOException {
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DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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factory.setNamespaceAware(true);
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DocumentBuilder builder = factory.newDocumentBuilder();
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Document doc = builder.parse(new InputSource(new StringReader(xmlInputString.trim())));
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List<XSSFSingleXmlCell> singleXmlCells = map.getRelatedSingleXMLCell();
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List<Table> tables = map.getRelatedTables();
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XPathFactory xpathFactory = XPathFactory.newInstance();
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XPath xpath = xpathFactory.newXPath();
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// Setting namespace context to XPath
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// Assuming that the namespace prefix in the mapping xpath is the
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// same as the one used in the document
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final PrefixResolver resolver = new PrefixResolverDefault(doc.getDocumentElement());
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NamespaceContext ctx = new NamespaceContext() {
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public String getNamespaceURI(String prefix) {
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return resolver.getNamespaceForPrefix(prefix);
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}
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// Dummy implementation - not used!
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public Iterator getPrefixes(String val) {
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return null;
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}
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// Dummy implemenation - not used!
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public String getPrefix(String uri) {
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return null;
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}
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};
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xpath.setNamespaceContext(ctx);
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for (XSSFSingleXmlCell singleXmlCell : singleXmlCells) {
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String xpathString = singleXmlCell.getXpath();
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Node result = (Node) xpath.evaluate(xpathString, doc, XPathConstants.NODE);
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String textContent = result.getTextContent();
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logger.log(POILogger.DEBUG, "Extracting with xpath " + xpathString + " : value is '" + textContent + "'");
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XSSFCell cell = singleXmlCell.getReferencedCell();
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logger.log(POILogger.DEBUG, "Setting '" + textContent + "' to cell " + cell.getColumnIndex() + "-" + cell.getRowIndex() + " in sheet "
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+ cell.getSheet().getSheetName());
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cell.setCellValue(textContent);
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}
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for (Table table : tables) {
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String commonXPath = table.getCommonXpath();
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NodeList result = (NodeList) xpath.evaluate(commonXPath, doc, XPathConstants.NODESET);
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int rowOffset = table.getStartCellReference().getRow() + 1;// the first row contains the table header
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int columnOffset = table.getStartCellReference().getCol() - 1;
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for (int i = 0; i < result.getLength(); i++) {
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// TODO: implement support for denormalized XMLs (see
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// OpenOffice part 4: chapter 3.5.1.7)
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for (XSSFXmlColumnPr xmlColumnPr : table.getXmlColumnPrs()) {
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int localColumnId = (int) xmlColumnPr.getId();
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int rowId = rowOffset + i;
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int columnId = columnOffset + localColumnId;
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String localXPath = xmlColumnPr.getLocalXPath();
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localXPath = localXPath.substring(localXPath.substring(1).indexOf('/') + 1);
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// Build an XPath to select the right node (assuming
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// that the commonXPath != "/")
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String nodeXPath = commonXPath + "[" + (i + 1) + "]" + localXPath;
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// TODO: convert the data to the cell format
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String value = (String) xpath.evaluate(nodeXPath, result.item(i), XPathConstants.STRING);
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logger.log(POILogger.DEBUG, "Extracting with xpath " + nodeXPath + " : value is '" + value + "'");
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XSSFRow row = table.getXSSFSheet().getRow(rowId);
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if (row == null) {
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row = table.getXSSFSheet().createRow(rowId);
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}
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XSSFCell cell = row.getCell(columnId);
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if (cell == null) {
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cell = row.createCell(columnId);
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}
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logger.log(POILogger.DEBUG, "Setting '" + value + "' to cell " + cell.getColumnIndex() + "-" + cell.getRowIndex() + " in sheet "
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+ table.getXSSFSheet().getSheetName());
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cell.setCellValue(value.trim());
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}
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}
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}
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}
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}
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