/
SlideShowNode.java
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/
SlideShowNode.java
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/**
* Copyright (c) 2018 BITPlan GmbH
*
* http://www.bitplan.com
*
* This file is part of the Opensource project at:
* https://github.com/BITPlan/com.bitplan.simplegraph
*
* 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.
*/
package com.bitplan.simplegraph.powerpoint;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Stream;
import org.apache.poi.POIXMLProperties;
import org.apache.poi.POIXMLProperties.CoreProperties;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.apache.poi.xslf.usermodel.XSLFSlide;
import com.bitplan.simplegraph.core.SimpleGraph;
import com.bitplan.simplegraph.core.SimpleNode;
import com.bitplan.simplegraph.impl.SimpleNodeImpl;
/**
* a slide show node wraps a power point slideshow
*
* @author wf
*
*/
public class SlideShowNode extends SimpleNodeImpl implements SlideShow {
protected XMLSlideShow slideshow;
protected String pathOrUl;
protected File pptFile;
/**
* get the SlideShow
*/
public XMLSlideShow getSlideshow() {
return slideshow;
}
/**
* create a SlideShow
*
* @param simpleGraph
* @param nodeQuery
* @throws Exception
*/
public SlideShowNode(SimpleGraph simpleGraph, String pathOrUrl,
String... keys) {
super(simpleGraph, "slideshow", keys);
InputStream is = null;
try {
try {
URL url = new URL(pathOrUrl);
is = url.openStream();
} catch (MalformedURLException e1) {
this.pathOrUl = pathOrUrl;
pptFile = new File(pathOrUl);
if (pptFile.canRead())
is = new FileInputStream(pathOrUl);
}
if (is != null)
slideshow = new XMLSlideShow(is);
else
slideshow = new XMLSlideShow();
} catch (IOException e) {
throw new RuntimeException(e);
}
super.setVertexFromMap();
}
/**
* get the core properties
*
* @return
*/
public CoreProperties getCoreProperties() {
POIXMLProperties props = slideshow.getProperties();
CoreProperties cp = props.getCoreProperties();
return cp;
}
@Override
public Map<String, Object> initMap() {
map.put("path", pathOrUl);
CoreProperties cp = getCoreProperties();
map.put("title", cp.getTitle());
return map;
}
@Override
public Stream<SimpleNode> out(String edgeName) {
return inOrOut(edgeName);
}
@Override
public Stream<SimpleNode> in(String edgeName) {
return inOrOut(edgeName);
}
private Stream<SimpleNode> inOrOut(String edgeName) {
Stream<SimpleNode> links = Stream.of();
switch (edgeName) {
case "slides":
List<SimpleNode> slideNodes = new ArrayList<SimpleNode>();
List<XSLFSlide> slides = slideshow.getSlides();
int pageNo = 1;
for (XSLFSlide slide : slides) {
SlideNode slideNode = new SlideNode(this, slide);
slideNodes.add(slideNode);
slideNode.property("pageNo", pageNo++);
slideNode.property("pages", slides.size());
}
links = slideNodes.stream();
break;
}
return links;
}
@Override
public String getTitle() {
Object titleObj = map.get("title");
if (titleObj != null)
return titleObj.toString();
else
return "";
}
@Override
public void setTitle(String title) {
this.getCoreProperties().setTitle(title);
map.put("title", title);
}
@Override
public void save() throws Exception {
FileOutputStream out = new FileOutputStream(pathOrUl);
slideshow.write(out);
out.close();
slideshow.close();
}
@Override
public Slide createSlide() {
XSLFSlide xslide = slideshow.createSlide();
return new SlideNode(this, xslide);
}
}