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PdfInputStreamFactory.java
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PdfInputStreamFactory.java
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/*-
* #%L
* Grid Exporter Add-on
* %%
* Copyright (C) 2022 - 2024 Flowing Code
* %%
* Licensed 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.
* #L%
*/
/** */
package com.flowingcode.vaadin.addons.gridexporter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.docx4j.Docx4J;
import org.docx4j.openpackaging.exceptions.Docx4JException;
import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
import org.docx4j.openpackaging.parts.WordprocessingML.MainDocumentPart;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author mlope
*/
@SuppressWarnings("serial")
class PdfInputStreamFactory<T> extends DocxInputStreamFactory<T> {
private static final Logger LOGGER = LoggerFactory.getLogger(PdfInputStreamFactory.class);
public PdfInputStreamFactory(GridExporter<T> exporter, String template) {
super(exporter, template);
}
@Override
public InputStream createInputStream() {
PipedInputStream in = new PipedInputStream();
try {
XWPFDocument doc = createDoc();
final PipedOutputStream out = new PipedOutputStream(in);
new Thread(
new Runnable() {
public void run() {
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
doc.write(baos);
WordprocessingMLPackage wordMLPackage =
WordprocessingMLPackage.load(new ByteArrayInputStream(baos.toByteArray()));
MainDocumentPart documentPart = wordMLPackage.getMainDocumentPart();
Docx4J.toPDF(wordMLPackage, out);
} catch (IOException e) {
LOGGER.error("Problem generating export", e);
} catch (Docx4JException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
LOGGER.error("Problem generating export", e);
}
}
}
}
})
.start();
} catch (IOException e) {
LOGGER.error("Problem generating export", e);
}
return in;
}
}