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/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* 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
* 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 org.apache.poi.sl.draw.geom;
import java.io.InputStream;
import java.util.LinkedHashMap;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.stream.EventFilter;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;
import org.apache.poi.sl.draw.binding.CTCustomGeometry2D;
import org.apache.poi.util.POILogFactory;
import org.apache.poi.util.POILogger;
/**
*
*/
public class PresetGeometries extends LinkedHashMap {
private final static POILogger LOG = POILogFactory.getLogger(PresetGeometries.class);
protected final static String BINDING_PACKAGE = "org.apache.poi.sl.draw.binding";
protected static PresetGeometries _inst;
protected PresetGeometries(){}
@SuppressWarnings("unused")
public void init(InputStream is) throws XMLStreamException, JAXBException {
// StAX:
EventFilter startElementFilter = new EventFilter() {
@Override
public boolean accept(XMLEvent event) {
return event.isStartElement();
}
};
XMLInputFactory staxFactory = XMLInputFactory.newFactory();
XMLEventReader staxReader = staxFactory.createXMLEventReader(is);
XMLEventReader staxFiltRd = staxFactory.createFilteredReader(staxReader, startElementFilter);
// ignore StartElement:
/* XMLEvent evDoc = */ staxFiltRd.nextEvent();
// JAXB:
JAXBContext jaxbContext = JAXBContext.newInstance(BINDING_PACKAGE);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
long cntElem = 0;
while (staxFiltRd.peek() != null) {
StartElement evRoot = (StartElement)staxFiltRd.peek();
String name = evRoot.getName().getLocalPart();
JAXBElement el = unmarshaller.unmarshal(staxReader, CTCustomGeometry2D.class);
CTCustomGeometry2D cus = el.getValue();
cntElem++;
if(containsKey(name)) {
LOG.log(POILogger.WARN, "Duplicate definition of " + name);
}
put(name, new CustomGeometry(cus));
}
}
/**
* Convert a single CustomGeometry object, i.e. from xmlbeans
*/
public static CustomGeometry convertCustomGeometry(XMLStreamReader staxReader) {
try {
JAXBContext jaxbContext = JAXBContext.newInstance(BINDING_PACKAGE);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
JAXBElement el = unmarshaller.unmarshal(staxReader, CTCustomGeometry2D.class);
return new CustomGeometry(el.getValue());
} catch (JAXBException e) {
LOG.log(POILogger.ERROR, "Unable to parse single custom geometry", e);
return null;
}
}
public static synchronized PresetGeometries getInstance(){
if(_inst == null) {
// use a local object first to not assign a partly constructed object
// in case of failure
PresetGeometries lInst = new PresetGeometries();
try {
InputStream is = PresetGeometries.class.
getResourceAsStream("presetShapeDefinitions.xml");
try {
lInst.init(is);
} finally {
is.close();
}
} catch (Exception e){
throw new RuntimeException(e);
}
_inst = lInst;
}
return _inst;
}
}