thredds.cataloggen.CatalogGen Maven / Gradle / Ivy
/*
* 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.
*
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* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
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* 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
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// $Id: CatalogGen.java 63 2006-07-12 21:50:51Z edavis $
package thredds.cataloggen;
import thredds.catalog.*;
import thredds.catalog.parser.jdom.InvCatalogFactory10;
import thredds.cataloggen.config.CatGenConfigMetadataFactory;
import thredds.cataloggen.config.CatalogGenConfig;
import thredds.cataloggen.config.DatasetSource;
import ucar.nc2.units.DateType;
import java.io.*;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* CatalogGen crawls dataset sources given in a CatalogGenConfig file
* to produce THREDDS catalogs.
*
* To generate a catalog from a config file:
*
* String inFileName = "file:/home/edavis/testCatGenConfig.xml";
* String outFileName = "/home/edavis/testCatGenConfig-results.xml";
* StringBuffer log = new StringBuffer();
* CatalogGen catGen = new CatalogGen( inFileName);
* if ( catGen.isValid( log))
* {
* catGen.expand();
* catGen.writeCatalog( outFileName);
* }
*
*
*
* @author Ethan Davis
* @version $Ver$
*/
public class CatalogGen
{
//private static Log log = LogFactory.getLog( CatalogGen.class );
static private org.slf4j.Logger log = org.slf4j.LoggerFactory.getLogger(CatalogGen.class);
/** The catalog: initially as a CatGen config file, until expanded. */
private InvCatalog catalog = null;
/** The catalog factory that knows about CatalogGenConfig metadata. */
protected InvCatalogFactory catFactory = null;
public List getCatalogRefInfoList()
{
return catalogRefInfoList;
}
private List catalogRefInfoList = new ArrayList();
/**
* Constructs the CatalogGen for the given config document.
*
* @param configDocURL - the URL of the configuration document
*/
public CatalogGen( URL configDocURL)
{
// Create a InvCatalogFactory with CATALOG_GEN_CONFIG MetadataType registered.
log.debug( "CatalogGen(URL): create catalog and CatalogGenConfig converter." );
this.catFactory = InvCatalogFactory.getDefaultFactory( true );
this.catFactory.registerMetadataConverter( MetadataType.CATALOG_GEN_CONFIG.toString(),
new CatGenConfigMetadataFactory());
// Read the given XML config file.
log.debug( "CatalogGen(URL): reading the config doc <" + configDocURL.toString() + ">.");
this.catalog = this.catFactory.readXML( configDocURL.toString());
log.debug( "CatalogGen(URL): done.");
}
/**
* Constructs the CatalogGen for the given config document InputStream.
*
* @param configDocInputStream - the InputStream from which to read the config document.
* @param configDocURL - the URL for the config document.
*/
public CatalogGen( InputStream configDocInputStream, URL configDocURL )
{
// Create a InvCatalogFactory with CATALOG_GEN_CONFIG MetadataType registered.
log.debug( "CatalogGen(InputStream): create catalog and CatalogGenConfig converter." );
this.catFactory = new InvCatalogFactory( "default", true );
this.catFactory.registerMetadataConverter( MetadataType.CATALOG_GEN_CONFIG.toString(),
new CatGenConfigMetadataFactory() );
// Read the given XML config file.
log.debug( "CatalogGen(InputStream): reading the config doc <" + configDocURL.toString() + ">." );
this.catalog = this.catFactory.readXML( configDocInputStream, URI.create( configDocURL.toExternalForm()) );
log.debug( "CatalogGen(InputStream): CatalogGenConfig doc <" + this.catalog.getName() + "> read.");
}
/**
* Checks the validity of the configuration file.
* @param out - a StringBuffer with validity error and warning messages.
* @return - true if no errors, false if errors exist
*/
public boolean isValid( StringBuilder out)
{
log.debug( "isValid(): start");
return( this.catalog.check( out));
}
/**
* Expand the catalog. Each of the CatalogGenConfig metadata elements
* is expanded into its constituent datasets.
*/
public InvCatalog expand()
{
CatalogGenConfig tmpCgc = null;
List cgcList = null;
DatasetSource dss = null;
// Find and loop through each CatGenConfigMetadata object.
List mdataList = findCatGenConfigMdata( this.catalog.getDatasets());
for ( int i = 0; i < mdataList.size(); i++)
{
InvMetadata curMdata = (InvMetadata) mdataList.get( i);
InvDatasetImpl curParentDataset = ( (InvDatasetImpl) curMdata.getParentDataset());
// Loop through the CatalogGenConfig objects in current InvMetadata.
cgcList = (List) curMdata.getContentObject();
for ( int j = 0; j < cgcList.size(); j++)
{
tmpCgc = (CatalogGenConfig) cgcList.get( j);
log.debug( "expand(): mdata # " + i + " and catGenConfig # " + j + "." );
dss = tmpCgc.getDatasetSource();
InvCatalog generatedCat = null;
try
{
generatedCat = dss.fullExpand();
}
catch ( IOException e )
{
String tmpMsg = "Error: IOException on fullExpand() of DatasetSource <" + dss.getName() + ">: " + e.getMessage();
log.error( "expand(): " + tmpMsg);
curParentDataset.addDataset( new InvDatasetImpl( curParentDataset, tmpMsg));
break;
}
catalogRefInfoList.addAll( dss.getCatalogRefInfoList());
// Always a single top-level dataset in catalog returned by DatasetSource.fullExpand()
InvDataset genTopDs = (InvDataset) generatedCat.getDatasets().get( 0);
// Add all services in the generated catalog to the parent catalog.
for( Iterator it = generatedCat.getServices().iterator(); it.hasNext(); )
{
( (InvCatalogImpl) curParentDataset.getParentCatalog() ).addService( (InvService) it.next() );
}
// Add the generated catalog to the parent datasets, i.e., add all the
// datasets that are children of the generated catalogs' top-level dataset.
for ( Iterator it = genTopDs.getDatasets().iterator(); it.hasNext(); )
{
InvDatasetImpl curGenDataset = (InvDatasetImpl) it.next();
if ( curGenDataset.hasNestedDatasets())
{
// If the dataset has children datasets, add serviceName and make it inherited.
ThreddsMetadata tm = new ThreddsMetadata( false);
tm.setServiceName( genTopDs.getServiceDefault().getName());
InvMetadata md = new InvMetadata( genTopDs, null, XMLEntityResolver.CATALOG_NAMESPACE_10, "", true, true, null, tm);
curGenDataset.getLocalMetadata().addMetadata( md);
}
else
{
// Otherwise, add serviceName not inherited.
curGenDataset.getLocalMetadata().setServiceName( genTopDs.getServiceDefault().getName());
}
curParentDataset.addDataset( curGenDataset);
}
curParentDataset.finish();
}
// log.debug( "expand(): List datasets that are siblinks of current metadata record CGCM(" + i + ").");
// List list = curMdata.getParentDataset().getDatasets();
// Iterator it = list.iterator();
// while ( it.hasNext())
// {
// InvDatasetImpl curDs = (InvDatasetImpl) it.next();
// log.debug( "Dataset URL is " + curDs.getUrlPath() + ".");
// log.debug( "Dataset name is " + curDs.getName() + ".");
// }
// Remove the current metadata element from its parent dataset.
log.debug( "expand(): Remove metadata record CGCM(" + i + ")." );
curParentDataset.removeLocalMetadata( curMdata);
// *****
}
// Finish this catalog now that done building it.
((InvCatalogImpl) this.catalog).finish();
return( this.catalog);
}
public void setCatalogExpiresDate( DateType expiresDate )
{
((InvCatalogImpl) this.catalog).setExpires( expiresDate);
}
/**
* Writes the catalog as XML. The catalog is written to the file given
* in outFileName. If outFileName is null, the catalog
* is written to standard out.
*
* @param outFileName - the pathname of the output file.
*
* @throws IOException if can't write catalog
*/
public void writeCatalog( String outFileName)
throws IOException
{
log.debug( "writeCatalog(): writing catalog to " + outFileName + ".");
String invCatDTD = "http://www.unidata.ucar.edu/schemas/thredds/InvCatalog.0.6.dtd";
log.debug( "writeCatalog(): set the catalogs DTD (" + invCatDTD + ").");
// Set the catalogs DTD.
// ( (InvCatalogImpl) catalog).setDTDid( invCatDTD); LOOK !!
// Print the catalog as an XML document.
if ( outFileName == null)
{
log.debug( "writeCatalog(): write catalog to System.out.");
this.catFactory.writeXML( (InvCatalogImpl) catalog, System.out);
}
else
{
log.debug( "writeCatalog(): try writing catalog to the output file (" + outFileName + ").");
if ( ! this.catalog.getVersion().equals( "1.0" ) )
{
this.catFactory.writeXML( (InvCatalogImpl) catalog, outFileName );
}
else
{
// Override default output catalog version. (kludge for IDV backward compatibility)
InvCatalogFactory10 fac10 = (InvCatalogFactory10) this.catFactory.getCatalogConverter( XMLEntityResolver.CATALOG_NAMESPACE_10 );
fac10.setVersion( this.catalog.getVersion() );
BufferedOutputStream osCat = new BufferedOutputStream( new FileOutputStream( outFileName ) );
fac10.writeXML( (InvCatalogImpl) catalog, osCat );
osCat.close();
}
log.debug( "writeCatalog(): catalog written to " + outFileName + "." );
}
return;
}
InvCatalog getCatalog() { return( this.catalog ); }
private List findCatGenConfigMdata( List datasets)
{
List mdataList = new ArrayList();
if ( datasets == null) return( mdataList );
// Iterate through list of datasets.
Iterator it = datasets.iterator();
InvDataset curDataset = null;
while ( it.hasNext() )
{
curDataset = (InvDataset) it.next();
// Get all the local metadata for the given dataset.
ThreddsMetadata tm = ((InvDatasetImpl) curDataset).getLocalMetadata();
// Iterate over the local InvMetadata checking for CatalogGenConfig metadata.
Iterator itMdata = tm.getMetadata().iterator();
InvMetadata curMetadata = null;
while ( itMdata.hasNext())
{
curMetadata = (InvMetadata) itMdata.next();
if ( (curMetadata.getMetadataType() != null) &&
curMetadata.getMetadataType().equals( MetadataType.CATALOG_GEN_CONFIG.toString() ) )
{
mdataList.add( curMetadata );
}
else if ( (curMetadata.getNamespaceURI() != null) &&
curMetadata.getNamespaceURI().equals( CatalogGenConfig.CATALOG_GEN_CONFIG_NAMESPACE_URI_0_5 ))
{
mdataList.add( curMetadata );
}
}
// Recurse through nested datasets and find CatalogGenConfig metadata.
mdataList.addAll( this.findCatGenConfigMdata( curDataset.getDatasets() ) );
}
return( mdataList);
}
}
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