thredds.catalog2.xml.writer.stax.CatalogElementWriter Maven / Gradle / Ivy
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The NetCDF-Java Library is a Java interface to NetCDF files,
as well as to many other types of scientific data formats.
/*
* Copyright 1998-2009 University Corporation for Atmospheric Research/Unidata
*
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
* Access and use of this software shall impose the following obligations
* and understandings on the user. The user is granted the right, without
* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
* documentation for any purpose whatsoever, provided that this entire
* notice appears in all copies of the software, derivative works and
* supporting documentation. Further, UCAR requests that the user credit
* UCAR/Unidata in any publications that result from the use of this
* software or in any product that includes this software. The names UCAR
* and/or Unidata, however, may not be used in any advertising or publicity
* to endorse or promote any products or commercial entity unless specific
* written permission is obtained from UCAR/Unidata. The user also
* understands that UCAR/Unidata is not obligated to provide the user with
* any support, consulting, training or assistance of any kind with regard
* to the use, operation and performance of this software nor to provide
* the user with any updates, revisions, new versions or "bug fixes."
*
* THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package thredds.catalog2.xml.writer.stax;
import thredds.catalog2.Catalog;
import thredds.catalog2.Service;
import thredds.catalog2.Property;
import thredds.catalog2.xml.writer.ThreddsXmlWriterException;
import thredds.catalog2.xml.names.CatalogNamespace;
import thredds.catalog2.xml.names.CatalogElementNames;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.stream.XMLStreamException;
import ucar.nc2.units.DateFormatter;
/**
* _more_
*
* @author edavis
* @since 4.0
*/
public class CatalogElementWriter implements AbstractElementWriter
{
private org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger( getClass() );
// ToDo How wire catalog elements together?
// public static enum CatalogElementWriterFactory implements AbstractElementWriterFactory
// {
// SINGLETON;
//
// private List factories;
//
// CatalogElementWriterFactory()
// {
// this.factories = Collections.emptyList();
// }
//
// public void setElementWriterFactoryList( List factoryList )
// {
// this.factories = factoryList;
// }
// }
public CatalogElementWriter() {}
public void writeElement( Catalog catalog, XMLStreamWriter writer, int nestLevel )
throws ThreddsXmlWriterException
{
String indentString = StaxWriter.getIndentString( nestLevel );
try
{
if ( nestLevel == 0 )
{
writer.writeStartDocument();
writer.writeCharacters( "\n" );
}
else
writer.writeCharacters( indentString );
boolean isEmptyElement = catalog.getServices().isEmpty()
&& catalog.getProperties().isEmpty()
&& catalog.getDatasets().isEmpty();
if ( isEmptyElement )
writer.writeEmptyElement( CatalogElementNames.CatalogElement.toString() );
else
writer.writeStartElement( CatalogElementNames.CatalogElement.toString() );
if ( nestLevel == 0 )
{
writer.writeNamespace( CatalogNamespace.CATALOG_1_0.getStandardPrefix(),
CatalogNamespace.CATALOG_1_0.getNamespaceUri() );
writer.writeNamespace( CatalogNamespace.XLINK.getStandardPrefix(),
CatalogNamespace.XLINK.getNamespaceUri() );
}
if ( catalog.getName() != null )
writer.writeAttribute( CatalogElementNames.CatalogElement_Name.toString(), catalog.getName() );
if ( catalog.getVersion() != null )
writer.writeAttribute( CatalogElementNames.CatalogElement_Version.toString(), catalog.getVersion() );
if ( catalog.getExpires() != null )
{
writer.writeAttribute( CatalogElementNames.CatalogElement_Expires.toString(),
catalog.getExpires().toDateTimeStringISO());
}
if ( catalog.getLastModified() != null )
{
writer.writeAttribute( CatalogElementNames.CatalogElement_LastModified.toString(),
catalog.getLastModified().toDateTimeStringISO());
}
writer.writeCharacters( "\n" );
for ( Service curService : catalog.getServices() )
new ServiceElementWriter().writeElement( curService, writer, nestLevel + 1 );
for ( Property curProperty : catalog.getProperties() )
new PropertyElementWriter().writeElement( curProperty, writer, nestLevel + 1 );
if ( ! isEmptyElement )
{
writer.writeCharacters( indentString );
writer.writeEndElement();
writer.writeCharacters( "\n" );
}
if ( nestLevel == 0)
writer.writeEndDocument();
writer.flush();
if ( nestLevel == 0 )
writer.close();
}
catch ( XMLStreamException e )
{
log.error( "writeElement(): Failed while writing to XMLStreamWriter: " + e.getMessage());
throw new ThreddsXmlWriterException( "Failed while writing to XMLStreamWriter: " + e.getMessage(), e );
}
}
}