001 package edu.nrao.sss.model.source.parser;
002
003 import java.io.Reader;
004 import java.io.IOException;
005
006 import javax.xml.bind.JAXBException;
007 import javax.xml.stream.XMLStreamException;
008
009 import edu.nrao.sss.model.RepositoryException;
010 import edu.nrao.sss.model.source.Source;
011 import edu.nrao.sss.model.source.SourceCatalog;
012
013 /**
014 * A parser of source catalogs that are expressed in XML.
015 * <p>
016 * <b>Version Info:</b>
017 * <table style="margin-left:2em">
018 * <tr><td>$Revision: 831 $</td></tr>
019 * <tr><td>$Date: 2007-08-20 10:44:24 -0600 (Mon, 20 Aug 2007) $</td></tr>
020 * <tr><td>$Author: dharland $</td></tr>
021 * </table></p>
022 *
023 * @author David M. Harland
024 * @since 2007-05-17
025 */
026 public class XmlSourceCatalogReader
027 extends AbstractSourceCatalogReader
028 {
029 /**
030 * NOTE: This method closes the incoming Reader!
031 *
032 * @see AbstractSourceCatalogReader#read(java.io.Reader,
033 * edu.nrao.sss.model.source.SourceCatalog)
034 */
035 public boolean read(Reader in, SourceCatalog destination)
036 {
037 try
038 {
039 //Creates a NEW catalog
040 catalog = SourceCatalog.fromXml(in);
041
042 if (sourceInfoOrigin != null)
043 setOriginOfInfo(catalog);
044
045 //New catalog should have null IDs, but the XML file may have brought
046 //IDs that could conflict with already stored catalogs & sources.
047 catalog.clearId();
048
049 //If we were given a catalog, move data from new catalog to the given one
050 if (destination != null)
051 {
052 destination.setName (catalog.getName() );
053 destination.addItems (catalog.getItems() );
054 destination.addGroups(catalog.getGroups());
055
056 catalog = destination;
057 }
058
059 in.close();
060
061 readWasSuccessful = true;
062 }
063 catch (JAXBException ex)
064 {
065 Throwable e = ex.getLinkedException();
066 if (e != null)
067 putError(0, e.getMessage());
068
069 else
070 putError(0, ex.getMessage());
071
072 catalog = null;
073 readWasSuccessful = false;
074 }
075
076 catch (XMLStreamException xe)
077 {
078 Throwable e = xe.getNestedException();
079 if (e != null)
080 putError(0, e.getMessage());
081
082 else
083 putError(0, xe.getMessage());
084
085 catalog = null;
086 readWasSuccessful = false;
087 }
088
089 catch (IOException ioe)
090 {
091 putError(0, ioe.getMessage());
092 catalog = null;
093 readWasSuccessful = false;
094 }
095
096 return readWasSuccessful;
097 }
098
099 //============================================================================
100 //
101 //============================================================================
102
103 /** Sets the originOfInformation property of all sources in catalog. */
104 private void setOriginOfInfo(SourceCatalog catalog)
105 {
106 try
107 {
108 for (Source source : catalog.getSources())
109 source.setOriginOfInformation(sourceInfoOrigin);
110 }
111 catch (RepositoryException ex)
112 {
113 throw new RuntimeException(
114 "SourceCatalog.getSources claimed to never throw this exception.", ex);
115 }
116 }
117 }