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85 lines
2.6 KiB
Java
85 lines
2.6 KiB
Java
package org.gcube.spatial.data.sdi.engine.impl.metadata;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.Reader;
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import java.util.List;
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import java.util.UUID;
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import javax.xml.transform.TransformerException;
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import javax.xml.transform.dom.DOMSource;
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import javax.xml.transform.stream.StreamResult;
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import org.gcube.common.resources.gcore.utils.XPathHelper;
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import org.gcube.spatial.data.sdi.engine.impl.metadata.templates.AbstractTemplate.InsertionPoint;
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import org.w3c.dom.Document;
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import org.w3c.dom.Element;
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import org.xml.sax.InputSource;
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import org.xml.sax.SAXException;
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import lombok.extern.slf4j.Slf4j;
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@Slf4j
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public class MetadataHandler {
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private Document document=null;
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private String metaUUID=null;
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private XPathHelper helper;
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public MetadataHandler(File xmlFile){
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// Get document owner
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Element documentNode=null;
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try{
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InputStream inputStream= new FileInputStream(xmlFile);
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Reader reader = new InputStreamReader(inputStream,"UTF-8");
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InputSource is = new InputSource(reader);
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documentNode = MetadataUtils.docBuilder.parse(is).getDocumentElement();
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document=documentNode.getOwnerDocument();
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helper=MetadataUtils.getHelper(document);
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// document = (Document)xpath.evaluate("/", inputSource, XPathConstants.NODE);
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}catch(Exception e){
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// throw e;
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throw new RuntimeException("Unable to fix : unable to get Document",e);
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}
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}
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public String getUUID() throws SAXException, IOException{
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//Set | get meta UUID
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if(metaUUID==null){
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log.debug("Managing metadata ID.. ");
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List<String> metaUUIDList=helper.evaluate("//gmd:fileIdentifier/gco:CharacterString/text()");
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if(metaUUIDList.isEmpty()){
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metaUUID=UUID.randomUUID().toString();
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log.debug("Stting uuid {} ",metaUUID);
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MetadataUtils.addContent("gmd:MD_Metadata",document,String.format(CommonMetadataPieces.fileIdentifier, metaUUID),helper,MetadataUtils.Position.first_child);
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}else {
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metaUUID=metaUUIDList.get(0);
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log.debug("Found meta UUID {} ",metaUUID);
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}
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}
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return metaUUID;
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}
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public void addContent(String content, InsertionPoint insertion) throws SAXException, IOException{
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MetadataUtils.addContent(insertion.getElementReference(), document, content, helper, insertion.getPosition());
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}
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public File writeOut() throws IOException, TransformerException{
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DOMSource source = new DOMSource(document);
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File output=File.createTempFile("meta_", ".xml");
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output.createNewFile();
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StreamResult result = new StreamResult(output);
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MetadataUtils.transformer.transform(source, result);
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return output;
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}
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} |