120 lines
3.8 KiB
Java
120 lines
3.8 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.xssf.model;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.LinkedList;
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import org.apache.poi.ss.usermodel.SharedStringSource;
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import org.apache.xmlbeans.XmlException;
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import org.apache.xmlbeans.XmlOptions;
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import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTRst;
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import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTSst;
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import org.openxmlformats.schemas.spreadsheetml.x2006.main.SstDocument;
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/**
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* Table of strings shared across all sheets in a workbook.
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*
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* @version $Id$
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*/
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public class SharedStringsTable implements SharedStringSource, XSSFModel {
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private final LinkedList<String> strings = new LinkedList<String>();
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private SstDocument doc;
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/**
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* Create a new SharedStringsTable, by reading it
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* from the InputStream of a PackagePart.
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*
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* @param is The input stream containing the XML document.
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* @throws IOException if an error occurs while reading.
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*/
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public SharedStringsTable(InputStream is) throws IOException {
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readFrom(is);
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}
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/**
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* Create a new, empty SharedStringsTable
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*/
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public SharedStringsTable() {
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doc = SstDocument.Factory.newInstance();
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}
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/**
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* Read this shared strings table from an XML file.
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*
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* @param is The input stream containing the XML document.
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* @throws IOException if an error occurs while reading.
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*/
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public void readFrom(InputStream is) throws IOException {
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try {
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doc = SstDocument.Factory.parse(is);
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for (CTRst rst : doc.getSst().getSiArray()) {
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strings.add(rst.getT());
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}
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} catch (XmlException e) {
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throw new IOException(e.getLocalizedMessage());
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}
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}
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public String getSharedStringAt(int idx) {
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return strings.get(idx);
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}
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public synchronized int putSharedString(String s) {
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if (strings.contains(s)) {
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return strings.indexOf(s);
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}
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strings.add(s);
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return strings.size() - 1;
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}
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/**
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* For unit testing only!
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*/
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public int _getNumberOfStrings() {
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return strings.size();
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}
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/**
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* Write this table out as XML.
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*
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* @param out The stream to write to.
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* @throws IOException if an error occurs while writing.
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*/
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public void writeTo(OutputStream out) throws IOException {
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XmlOptions options = new XmlOptions();
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options.setSaveOuter();
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options.setUseDefaultNamespace();
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// Requests use of whitespace for easier reading
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options.setSavePrettyPrint();
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SstDocument doc = SstDocument.Factory.newInstance(options);
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CTSst sst = doc.addNewSst();
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sst.setCount(strings.size());
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sst.setUniqueCount(strings.size());
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for (String s : strings) {
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sst.addNewSi().setT(s);
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}
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doc.save(out, options);
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}
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}
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