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/**
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* '$RCSfile$'
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* Purpose: A class to asyncronously do delta-T replication checking
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Chad Berkley
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* Release: @release@
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*
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat;
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import java.io.StringReader;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.util.Hashtable;
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import java.util.Vector;
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import org.apache.xpath.objects.XObject;
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import org.apache.xpath.XPathAPI;
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import org.apache.xerces.parsers.DOMParser;
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import org.apache.xerces.dom.DocumentTypeImpl;
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import org.w3c.dom.Attr;
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import org.w3c.dom.NamedNodeMap;
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import org.w3c.dom.NodeList;
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import org.w3c.dom.Document;
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import org.w3c.dom.Node;
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import org.w3c.dom.NodeList;
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import org.w3c.dom.DocumentType;
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import org.xml.sax.InputSource;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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import javax.xml.transform.*;
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import javax.xml.transform.stream.*;
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import javax.xml.transform.dom.*;
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import org.ecoinformatics.eml.EMLParser;
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/**
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* This class will figure out which content type it is for a given data file.
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* First, from xml_relation to get all relative files to this data file.
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* Then from xml_documents to get physical files. From physical file pull out
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* the content type
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*/
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public class ContentTypeProvider
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{
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private String dataFileId = null;
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private String contentType = null;
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private String packageType = null;
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private Hashtable contentTypeHash = new Hashtable();
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//Constant
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private String BETA = "beta";
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private String EML2 = "eml2";
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private String DEFAULTCONTENTTYPE = MetaCatUtil.
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getOption("defaultcontenttype");
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private String FORMATPATH = "//format";
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private String TEXT = "text";
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private String TEXTYPE ="text/plain";
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private String XML = "xml";
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private String XMLTYPE = "text/xml";
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private String HTML = "HTML";
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private String HTMLTYPE = "text/html";
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private String GIF = "gif";
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private String JPEG = "jpeg";
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private String JPEGTYPE = "image/jpeg";
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private String GIFTYPE = "image/gif";
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private String BMP = "bmp";
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private String BMPTYPE = "image/bmp";
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private String TAR = "tar";
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private String TARTYPE ="application/x-tar";
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private String ZIP = "zip";
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private String ZIPTYPE = "application/x-zip-compressed";
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private String BINARY = "binary";
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private String BINARYTYPE = "application/octet-stream";
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private String ENTITYDOCTYPE = "entitydoctype";
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private String PHYSICALDOCTYPE = "physicaldoctype";
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private String EML2DOCTYPE = "eml2namespace";
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private String DATAFORMAT = "dataFormat";
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private String TEXTFORMAT = "textFormat";
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private String EXTENALFORMAT = "externallyDefinedFormat";
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private String FORMATNAME = "formatName";
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private String BINARYRASTERFORMAT = "binaryRasterFormat";
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private String DATAFILEPATH ="//physical/distribution/online/url";
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/**
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* Constructor of ContentTypeProvider
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*/
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public ContentTypeProvider(String docIdWithRevision)
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{
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dataFileId = MetaCatUtil.getDocIdFromString(docIdWithRevision);
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//get relative doclist for data file and package type
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Vector docLists = null;
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docLists = getRelativeDocIdList(dataFileId);
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if ( packageType == null)
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{
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// other situation, contenetype is default value
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contentType = DEFAULTCONTENTTYPE;
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}
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else if (packageType.equals(BETA))
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{
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// for beta package and get entity docid for the data file
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String entityDocid = getTargetDocIdForBeta(docLists, ENTITYDOCTYPE);
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// get physical docid for data file
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docLists = getRelativeDocIdList(entityDocid);
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String physicalDocId = getTargetDocIdForBeta(docLists, PHYSICALDOCTYPE);
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// if no physical docid assign to this data file, content type is default
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if (physicalDocId == null)
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{
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contentType = DEFAULTCONTENTTYPE;
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}
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else
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{
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parsePhysicalDocumentForBeta(physicalDocId);
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}
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}
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else if (packageType.equals(EML2))
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{
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// for eml2 package
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// get eml document for data file
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String eml2Docid = getTargetDocIdForBeta(docLists, EML2DOCTYPE);
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findContentTypeInEML2(eml2Docid);
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}
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}
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/** Method to get content type */
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public String getContentType()
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{
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return contentType;
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}//getContentType
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/* Method to find content type base on data format*/
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private void findContentTypeInEML2(String eml2DocId)
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{
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DocumentImpl xmlDoc = null;
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String xmlString = null;
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StringReader read = null;
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InputSource in = null;
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DocumentBuilderFactory dfactory = null;
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Document doc = null;
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// create xml document
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try
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{
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xmlDoc = new DocumentImpl(eml2DocId);
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xmlString = xmlDoc.toString();
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// create dom tree
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read = new StringReader(xmlString);
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in = new InputSource(read);
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dfactory = DocumentBuilderFactory.newInstance();
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dfactory.setNamespaceAware(false);
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doc = dfactory.newDocumentBuilder().parse(in);
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}
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catch (Exception e)
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{
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// if faild, set default value
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contentType = DEFAULTCONTENTTYPE;
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MetaCatUtil.debugMessage("Error in ContentTypeProvider." +
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"findContentTypeInEML2()" + e.getMessage(), 30);
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return;
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}
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Node dataFormatNode = findDataFormatNodeInEML2(doc, DATAFILEPATH,
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dataFileId);
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NodeList childList = dataFormatNode.getChildNodes();
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// go through childList
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for (int i = 0; i<childList.getLength(); i++)
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{
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Node child = childList.item(i);
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// if has text format child set to text/plain
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if (child.getNodeName() != null && child.getNodeName().equals(TEXTFORMAT))
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{
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MetaCatUtil.debugMessage("in text format", 35);
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contentType = TEXTYPE;
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}
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//external format
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if (child.getNodeName() != null && child.getNodeName().equals(EXTENALFORMAT))
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{
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MetaCatUtil.debugMessage("in external format ", 35);
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String format = getTextValueForGivenChildTag(child, FORMATNAME);
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MetaCatUtil.debugMessage("The format is: "+format, 35);
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// if we can find the format in the contentTypeHash table
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contentType = (String)lookUpContentType(format);
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if (contentType == null)
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{
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contentType = BINARYTYPE;
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}
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}
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// binaryRasterFormat
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if (child.getNodeName() != null && child.getNodeName().
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equals(BINARYRASTERFORMAT))
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{
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contentType = BINARYTYPE;
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}//if
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}//for
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//if contentype still be null, set default value
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if (contentType == null)
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{
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contentType = DEFAULTCONTENTTYPE;
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}
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}
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/* Method get text value of given child tagname*/
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private String getTextValueForGivenChildTag(Node parentNode,
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String childTagName)
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{
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String textValue = null;
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NodeList childList = parentNode.getChildNodes();
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for (int i= 0; i<childList.getLength();i++)
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{
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Node child = childList.item(i);
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if (child.getNodeName() != null && child.getNodeName().equals(childTagName))
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{
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MetaCatUtil.debugMessage("Find child node: " + childTagName, 35);
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Node textNode = child.getFirstChild();
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if (textNode.getNodeType() == Node.TEXT_NODE)
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{
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textValue = textNode.getNodeValue();
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}//if
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}//if
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}//for
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MetaCatUtil.debugMessage("The text value for element- " + childTagName +
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" is " + textValue, 30);
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return textValue;
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}//getTExtValueForGivenChildTag
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/* Find the data format node in eml2 document */
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private Node findDataFormatNodeInEML2(Document xml, String xPath,
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String targetDocId)
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{
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Node targetNode = null;
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Node node = findDataFileNodeInEML2(xml, xPath, targetDocId);
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// get the phycial the prent is online, grandparent is distribution
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// the grand'parent is physical
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Node phyicalNode = node.getParentNode().getParentNode().getParentNode();
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NodeList list = phyicalNode.getChildNodes();
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for (int i = 0; i<list.getLength(); i++)
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{
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Node kid = list.item(i);
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// find dataFormat node
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if (kid.getNodeType() == node.ELEMENT_NODE &&
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kid.getNodeName().equals(DATAFORMAT))
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{
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targetNode = kid;
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break;
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}//if
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}//for
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MetaCatUtil.debugMessage("dataFormat node'name: "+
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targetNode.getNodeName(), 35);
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return targetNode;
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}
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/* Find the datafile node */
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private Node findDataFileNodeInEML2(Document xml, String xPath,
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String targetDocId)
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{
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Node dataFileNode = null;
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NodeList list = null;
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try
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{
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list = XPathAPI.selectNodeList(xml, xPath);
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}
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catch (Exception e)
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{
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// catch an error and return null
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MetaCatUtil.debugMessage("Error in findDataFileNode: "+e.getMessage(), 30);
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return dataFileNode;
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}
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// go through the list and find target docid in online/url
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for (int i = 0; i<list.getLength(); i++)
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297 |
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{
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298 |
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Node node = list.item(i);
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Node textNode = node.getFirstChild();
|
300 |
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if (textNode.getNodeType() == node.TEXT_NODE)
|
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{
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String URLData = textNode.getNodeValue();
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MetaCatUtil.debugMessage("online/url text data: " + URLData, 30);
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//Only handle data file in local metacat server
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if (URLData.indexOf(MetaCatUtil.getOption("httpserver")) != -1 ||
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URLData.indexOf(MetaCatUtil.getOption("server")) != -1)
|
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{
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// Get docid from url
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String docId =MetaCatUtil.getDocIdWithRevFromOnlineURL(URLData);
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// Get rid of revision
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docId = MetaCatUtil.getDocIdFromString(docId);
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MetaCatUtil.debugMessage("docid from url element in xml is: "+
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docId, 30);
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//if this docid equals target one, we find it
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if (docId != null && docId.equals(targetDocId))
|
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{
|
317 |
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MetaCatUtil.debugMessage("Find target docid in online/url: "+
|
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docId, 30);
|
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dataFileNode = node;
|
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break;
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}
|
322 |
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}//if
|
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|
324 |
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}//if
|
325 |
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}//for
|
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MetaCatUtil.debugMessage("online/url node's name: " +
|
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dataFileNode.getNodeName(), 35);
|
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return dataFileNode;
|
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}//findDataFileNode
|
330 |
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/* Get relative docid list and packagetype */
|
332 |
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|
private Vector getRelativeDocIdList(String id)
|
333 |
|
|
{
|
334 |
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|
Vector docList = new Vector();
|
335 |
|
|
String sql = "SELECT packagetype, subject from xml_relation " +
|
336 |
|
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"where object = ?";
|
337 |
|
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ResultSet rs = null;
|
338 |
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|
PreparedStatement pStmt=null;
|
339 |
|
|
DBConnection conn = null;
|
340 |
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|
int serialNumber = -1;
|
341 |
|
|
try
|
342 |
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{
|
343 |
|
|
//check out DBConnection
|
344 |
|
|
conn=DBConnectionPool.getDBConnection
|
345 |
|
|
("ContentTypeProvider.getRelativeDocIdlist");
|
346 |
|
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serialNumber=conn.getCheckOutSerialNumber();
|
347 |
|
|
pStmt = conn.prepareStatement(sql);
|
348 |
|
|
// binding value
|
349 |
|
|
pStmt.setString(1, id);
|
350 |
|
|
//execute query
|
351 |
|
|
pStmt.execute();
|
352 |
|
|
rs = pStmt.getResultSet();
|
353 |
|
|
// get result list
|
354 |
|
|
String packType = null;
|
355 |
|
|
while (rs.next())
|
356 |
|
|
{
|
357 |
|
|
packType = rs.getString(1);
|
358 |
|
|
String subject = rs.getString(2);
|
359 |
|
|
|
360 |
|
|
// get rid of duplicate record and add the docid into vector
|
361 |
|
|
if (!docList.contains(subject))
|
362 |
|
|
{
|
363 |
|
|
|
364 |
|
|
docList.add(subject);
|
365 |
|
|
}
|
366 |
|
|
}//while
|
367 |
|
|
|
368 |
|
|
// set up data package type
|
369 |
|
|
if ((MetaCatUtil.getOptionList(MetaCatUtil.getOption("packagedoctype"))).
|
370 |
|
|
contains(packType))
|
371 |
|
|
{
|
372 |
|
|
//this is beta4 or beta6 version
|
373 |
|
|
MetaCatUtil.debugMessage("This is beta package", 30);
|
374 |
|
|
packageType = BETA;
|
375 |
|
|
}
|
376 |
|
|
else if ((MetaCatUtil.getOptionList
|
377 |
|
|
(MetaCatUtil.getOption("eml2namespace"))).contains(packType))
|
378 |
|
|
{
|
379 |
|
|
// this eml 2 document
|
380 |
|
|
MetaCatUtil.debugMessage("This is EML2 package", 30);
|
381 |
|
|
packageType = EML2;
|
382 |
|
|
}
|
383 |
|
|
|
384 |
|
|
|
385 |
|
|
}//try
|
386 |
|
|
catch(SQLException e)
|
387 |
|
|
{
|
388 |
|
|
|
389 |
|
|
MetaCatUtil.debugMessage("ContenTypProvider.getRelativeDoclist1 " +
|
390 |
|
|
e.getMessage(), 30);
|
391 |
|
|
}//catch
|
392 |
|
|
finally
|
393 |
|
|
{
|
394 |
|
|
try
|
395 |
|
|
{
|
396 |
|
|
pStmt.close();
|
397 |
|
|
}
|
398 |
|
|
catch (SQLException ee)
|
399 |
|
|
{
|
400 |
|
|
MetaCatUtil.debugMessage("ContenTypProvider.getRelativeDoclist2 " +
|
401 |
|
|
ee.getMessage(), 30);
|
402 |
|
|
}
|
403 |
|
|
finally
|
404 |
|
|
{
|
405 |
|
|
DBConnectionPool.returnDBConnection(conn, serialNumber);
|
406 |
|
|
}
|
407 |
|
|
}//finally
|
408 |
|
|
|
409 |
|
|
return docList;
|
410 |
|
|
}// getRelativeDocIdList
|
411 |
|
|
|
412 |
|
|
/* Method to get physical document for data file in xml_documents table for
|
413 |
|
|
* beta eml package
|
414 |
|
|
*/
|
415 |
|
|
private String getTargetDocIdForBeta(Vector list, String targetType)
|
416 |
|
|
{
|
417 |
|
|
String docId = null;
|
418 |
|
|
// make sure list is not empty
|
419 |
|
|
if (list.isEmpty())
|
420 |
|
|
{
|
421 |
|
|
|
422 |
|
|
return docId;
|
423 |
|
|
}
|
424 |
|
|
// get sql command
|
425 |
|
|
String sql = "SELECT doctype, docid from xml_documents where docid in (";
|
426 |
|
|
// the first element
|
427 |
|
|
sql = sql + "'"+(String)list.elementAt(0) + "'";
|
428 |
|
|
for (int i=1; i<list.size(); i++)
|
429 |
|
|
{
|
430 |
|
|
String docid = (String) list.elementAt(i);
|
431 |
|
|
sql = sql + ", '" + docid + "'";
|
432 |
|
|
}//for
|
433 |
|
|
// add parensis
|
434 |
|
|
sql = sql + ")";
|
435 |
|
|
MetaCatUtil.debugMessage("SQL for select doctype: "+ sql, 35);
|
436 |
|
|
ResultSet rs = null;
|
437 |
|
|
PreparedStatement pStmt=null;
|
438 |
|
|
DBConnection conn = null;
|
439 |
|
|
int serialNumber = -1;
|
440 |
|
|
try
|
441 |
|
|
{
|
442 |
|
|
//check out DBConnection
|
443 |
|
|
conn=DBConnectionPool.getDBConnection
|
444 |
|
|
("ContentTypeProvider.setPhycialDocIdForBeta");
|
445 |
|
|
serialNumber=conn.getCheckOutSerialNumber();
|
446 |
|
|
pStmt = conn.prepareStatement(sql);
|
447 |
|
|
//execute query
|
448 |
|
|
pStmt.execute();
|
449 |
|
|
rs = pStmt.getResultSet();
|
450 |
|
|
// get result list
|
451 |
|
|
while (rs.next())
|
452 |
|
|
{
|
453 |
|
|
String packType = rs.getString(1);
|
454 |
|
|
String targetId = rs.getString(2);
|
455 |
|
|
// find physical document
|
456 |
|
|
if ((MetaCatUtil.getOptionList(MetaCatUtil.getOption(targetType))).
|
457 |
|
|
contains(packType))
|
458 |
|
|
{
|
459 |
|
|
// assign physical document and jump out the while loop
|
460 |
|
|
docId = targetId;
|
461 |
|
|
break;
|
462 |
|
|
}
|
463 |
|
|
}//while
|
464 |
|
|
|
465 |
|
|
}//try
|
466 |
|
|
catch(SQLException e)
|
467 |
|
|
{
|
468 |
|
|
|
469 |
|
|
MetaCatUtil.debugMessage("ContenTypProvider.setPhysicalDocIdForBeta1 " +
|
470 |
|
|
e.getMessage(), 30);
|
471 |
|
|
}//catch
|
472 |
|
|
finally
|
473 |
|
|
{
|
474 |
|
|
try
|
475 |
|
|
{
|
476 |
|
|
pStmt.close();
|
477 |
|
|
}
|
478 |
|
|
catch(SQLException ee)
|
479 |
|
|
{
|
480 |
|
|
MetaCatUtil.debugMessage("ContenTypProvider.setPhysicalDocIdForBeta2 " +
|
481 |
|
|
ee.getMessage(), 30);
|
482 |
|
|
}//catch
|
483 |
|
|
finally
|
484 |
|
|
{
|
485 |
|
|
DBConnectionPool.returnDBConnection(conn, serialNumber);
|
486 |
|
|
}
|
487 |
|
|
}//finally
|
488 |
1553
|
tao
|
MetaCatUtil.debugMessage("target docid is: "+ docId + " "+
|
489 |
1550
|
tao
|
"for target doctype: "+targetType, 25);
|
490 |
|
|
return docId;
|
491 |
|
|
}
|
492 |
|
|
|
493 |
|
|
|
494 |
|
|
|
495 |
|
|
|
496 |
|
|
/* Parser the beta physical document and find the value in format element*/
|
497 |
|
|
private void parsePhysicalDocumentForBeta(String physicalDocid)
|
498 |
|
|
{
|
499 |
|
|
String xmlDoc = null;
|
500 |
|
|
try
|
501 |
|
|
{
|
502 |
|
|
DocumentImpl doc = new DocumentImpl(physicalDocid);
|
503 |
|
|
xmlDoc = doc.toString();
|
504 |
|
|
}
|
505 |
|
|
catch (Exception e)
|
506 |
|
|
{
|
507 |
|
|
contentType = DEFAULTCONTENTTYPE;
|
508 |
|
|
MetaCatUtil.debugMessage("Error in ContentTypeProvider." +
|
509 |
|
|
"parsePhysicalDocumentForBeta()" + e.getMessage(), 30);
|
510 |
|
|
return;
|
511 |
|
|
}
|
512 |
|
|
// get format element's text value
|
513 |
|
|
String format = getTextValueFromPath(new StringReader(xmlDoc), FORMATPATH);
|
514 |
|
|
|
515 |
|
|
if (format == null)
|
516 |
|
|
{
|
517 |
|
|
// if couldn't find the format, set contentype default value;
|
518 |
|
|
contentType = DEFAULTCONTENTTYPE;
|
519 |
|
|
}
|
520 |
|
|
else
|
521 |
|
|
{
|
522 |
|
|
// if can find a format and look up from hash to get value
|
523 |
|
|
contentType = lookUpContentType(format);
|
524 |
|
|
// couldn't find the content type for this format in hash table
|
525 |
|
|
if (contentType == null)
|
526 |
|
|
{
|
527 |
|
|
//set default vlaue
|
528 |
|
|
contentType = DEFAULTCONTENTTYPE;
|
529 |
|
|
}//if
|
530 |
|
|
}//else
|
531 |
|
|
}//parsePhysicalDocumentForBeta
|
532 |
|
|
|
533 |
|
|
private String getTextValueFromPath(StringReader xml, String xPath)
|
534 |
|
|
{
|
535 |
|
|
String textValue = null;
|
536 |
|
|
// get nodelist from doc by path
|
537 |
|
|
try
|
538 |
|
|
{
|
539 |
|
|
NodeList list = EMLParser.getPathContent(xml, xPath);
|
540 |
|
|
Node elementNode = list.item(0);
|
541 |
|
|
Node textNode = elementNode.getFirstChild();
|
542 |
|
|
if (textNode.getNodeType() == Node.TEXT_NODE)
|
543 |
|
|
{
|
544 |
|
|
textValue = textNode.getNodeValue();// get value
|
545 |
|
|
}
|
546 |
|
|
|
547 |
|
|
}
|
548 |
|
|
catch (Exception e)
|
549 |
|
|
{
|
550 |
|
|
MetaCatUtil.debugMessage("error in ContentTypeProvider."+
|
551 |
|
|
"getTextValueFromPath: "+e.getMessage(), 30);
|
552 |
|
|
}
|
553 |
|
|
MetaCatUtil.debugMessage("The text value for " + xPath + " is: "+
|
554 |
|
|
textValue, 30);
|
555 |
|
|
return textValue;
|
556 |
|
|
}//getTextValueFromPath
|
557 |
|
|
|
558 |
|
|
/* A method to look up contentype */
|
559 |
|
|
private String lookUpContentType(String format)
|
560 |
|
|
{
|
561 |
|
|
String newFormat = null;
|
562 |
|
|
constructContentHashTable();
|
563 |
|
|
newFormat = format.toLowerCase().trim();
|
564 |
|
|
String type = null;
|
565 |
|
|
type = (String)contentTypeHash.get(newFormat);
|
566 |
|
|
MetaCatUtil.debugMessage("contentType looked from hashtalbe is: " +
|
567 |
|
|
type, 30);
|
568 |
|
|
return type;
|
569 |
|
|
}// lookupcontentypes
|
570 |
|
|
|
571 |
|
|
/* Construct content type hashtable */
|
572 |
|
|
private void constructContentHashTable()
|
573 |
|
|
{
|
574 |
|
|
contentTypeHash.put(TEXT, TEXTYPE);
|
575 |
|
|
contentTypeHash.put(XML, XMLTYPE);
|
576 |
|
|
contentTypeHash.put(HTML,HTMLTYPE);
|
577 |
|
|
contentTypeHash.put(GIF, GIFTYPE);
|
578 |
1553
|
tao
|
contentTypeHash.put(JPEG, JPEGTYPE);
|
579 |
1550
|
tao
|
contentTypeHash.put(BMP, BMPTYPE);
|
580 |
|
|
contentTypeHash.put(TAR, TARTYPE);
|
581 |
|
|
contentTypeHash.put(ZIP, ZIPTYPE);
|
582 |
|
|
contentTypeHash.put(BINARY, BINARYTYPE);
|
583 |
|
|
|
584 |
|
|
}//constructrContentHashTable();
|
585 |
|
|
|
586 |
1553
|
tao
|
|
587 |
|
|
|
588 |
1550
|
tao
|
public static void main(String[] argus)
|
589 |
|
|
{
|
590 |
|
|
try
|
591 |
|
|
{
|
592 |
|
|
DBConnectionPool pool = DBConnectionPool.getInstance();
|
593 |
1553
|
tao
|
//ContentTypeProvider provider = new ContentTypeProvider("tao.9830");
|
594 |
|
|
ContentTypeProvider provider = new ContentTypeProvider("tao.0001");
|
595 |
1550
|
tao
|
String str = provider.getContentType();
|
596 |
|
|
MetaCatUtil.debugMessage("content type is : " + str, 20);
|
597 |
|
|
}
|
598 |
|
|
catch(Exception e)
|
599 |
|
|
{
|
600 |
|
|
MetaCatUtil.debugMessage("erorr in Schemalocation.main: " +
|
601 |
|
|
e.getMessage(), 30);
|
602 |
|
|
}
|
603 |
|
|
}
|
604 |
|
|
}//ContentTypeProvider
|