org.apache.poi.xssf.model.Table Maven / Gradle / Ivy
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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
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package org.apache.poi.xssf.model;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.List;
import java.util.Vector;
import org.apache.poi.POIXMLDocumentPart;
import org.apache.poi.openxml4j.opc.PackagePart;
import org.apache.poi.openxml4j.opc.PackageRelationship;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.helpers.XSSFXmlColumnPr;
import org.apache.xmlbeans.XmlException;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTTable;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTTableColumn;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.TableDocument;
/**
*
* This class implements the Table Part (Open Office XML Part 4:
* chapter 3.5.1)
*
* This implementation works under the assumption that a table contains mappings to a subtree of an XML.
* The root element of this subtree an occur multiple times (one for each row of the table). The child nodes
* of the root element can be only attributes or element with maxOccurs=1 property set
*
*
* @author Roberto Manicardi
*/
public class Table extends POIXMLDocumentPart {
private CTTable ctTable;
private List xmlColumnPr;
private CellReference startCellReference;
private CellReference endCellReference;
private String commonXPath;
public Table() {
super();
ctTable = CTTable.Factory.newInstance();
}
public Table(PackagePart part, PackageRelationship rel)
throws IOException {
super(part, rel);
readFrom(part.getInputStream());
}
public void readFrom(InputStream is) throws IOException {
try {
TableDocument doc = TableDocument.Factory.parse(is);
ctTable = doc.getTable();
} catch (XmlException e) {
throw new IOException(e.getLocalizedMessage());
}
}
public XSSFSheet getXSSFSheet(){
return (XSSFSheet) getParent();
}
public void writeTo(OutputStream out) throws IOException {
TableDocument doc = TableDocument.Factory.newInstance();
doc.setTable(ctTable);
doc.save(out, DEFAULT_XML_OPTIONS);
}
@Override
protected void commit() throws IOException {
PackagePart part = getPackagePart();
OutputStream out = part.getOutputStream();
writeTo(out);
out.close();
}
public CTTable getCTTable(){
return ctTable;
}
/**
* Checks if this Table element contains even a single mapping to the map identified by id
* @param id the XSSFMap ID
* @return true if the Table element contain mappings
*/
public boolean mapsTo(long id){
boolean maps =false;
List pointers = getXmlColumnPrs();
for(XSSFXmlColumnPr pointer: pointers){
if(pointer.getMapId()==id){
maps=true;
break;
}
}
return maps;
}
/**
*
* Calculates the xpath of the root element for the table. This will be the common part
* of all the mapping's xpaths
*
* @return the xpath of the table's root element
*/
public String getCommonXpath() {
if(commonXPath == null){
String[] commonTokens ={};
for(CTTableColumn column :ctTable.getTableColumns().getTableColumnArray()){
if(column.getXmlColumnPr()!=null){
String xpath = column.getXmlColumnPr().getXpath();
String[] tokens = xpath.split("/");
if(commonTokens.length==0){
commonTokens = tokens;
}else{
int maxLenght = commonTokens.length>tokens.length? tokens.length:commonTokens.length;
for(int i =0; i subCommonTokens = Arrays.asList(commonTokens).subList(0, i);
String[] container = {};
commonTokens = subCommonTokens.toArray(container);
break;
}
}
}
}
}
commonXPath ="";
for(int i = 1 ; i< commonTokens.length;i++){
commonXPath +="/"+commonTokens[i];
}
}
return commonXPath;
}
public List getXmlColumnPrs() {
if(xmlColumnPr==null){
xmlColumnPr = new Vector();
for(CTTableColumn column:ctTable.getTableColumns().getTableColumnArray()){
if(column.getXmlColumnPr()!=null){
XSSFXmlColumnPr columnPr = new XSSFXmlColumnPr(this,column,column.getXmlColumnPr());
xmlColumnPr.add(columnPr);
}
}
}
return xmlColumnPr;
}
/**
* the number of mapped table columns (see Open Office XML Part 4: chapter 3.5.1.4)
* @return
*/
public long getNumerOfMappedColumns(){
return ctTable.getTableColumns().getCount();
}
/**
* The reference for the cell in the top-left part of the table
* (see Open Office XML Part 4: chapter 3.5.1.2, attribute ref)
* @return
*/
public CellReference getStartCellReference() {
if(startCellReference==null){
String ref = ctTable.getRef();
String[] boundaries = ref.split(":");
String from = boundaries[0];
startCellReference = new CellReference(from);
}
return startCellReference;
}
/**
* The reference for the cell in the bottom-right part of the table
* (see Open Office XML Part 4: chapter 3.5.1.2, attribute ref)
* @return
*/
public CellReference getEndCellReference() {
if(endCellReference==null){
String ref = ctTable.getRef();
String[] boundaries = ref.split(":");
String from = boundaries[1];
endCellReference = new CellReference(from);
}
return endCellReference;
}
/**
* Gets the total number of rows in the selection. (Note: in this version autofiltering is ignored)
* @return
*/
public int getRowCount(){
CellReference from = getStartCellReference();
CellReference to = getEndCellReference();
int rowCount = -1;
if (from!=null && to!=null){
rowCount = to.getRow()-from.getRow();
}
return rowCount;
}
}