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package org.hisp.dhis.dashboard.provider;
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* Copyright (c) 2004-2007, University of Oslo
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of the HISP project nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import java.io.IOException;
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import java.net.MalformedURLException;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import org.amplecode.staxwax.factory.XMLFactory;
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import org.amplecode.staxwax.reader.XMLReader;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.hisp.dhis.dashboard.rss.RssItem;
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import org.springframework.core.io.Resource;
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import org.springframework.core.io.UrlResource;
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import static org.hisp.dhis.system.util.MathUtils.getMax;
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* @author Lars Helge Overland
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public class RssContentProvider
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implements ContentProvider
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private static final Log log = LogFactory.getLog( RssContentProvider.class );
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private static final String COLLECTION_NAME = "channel";
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private static final String ITEM_NAME = "item";
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private static final String FIELD_TITLE = "title";
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private static final String FIELD_LINK = "link";
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private static final String FIELD_DATE = "pubDate";
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private static final String FIELD_DESCRIPTION = "description";
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private static final int MAX_ITEMS = 4;
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public void setUrl( String url )
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public void setKey( String key )
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// -------------------------------------------------------------------------
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// ContentProvider implementation
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// -------------------------------------------------------------------------
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public Map<String, Object> provide()
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Map<String, Object> content = new HashMap<String, Object>();
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content.put( key, getRss() );
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// -------------------------------------------------------------------------
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// -------------------------------------------------------------------------
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private List<RssItem> getRss()
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Resource resource = new UrlResource( url );
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XMLReader reader = XMLFactory.getXMLReader( resource.getInputStream() );
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List<RssItem> items = new ArrayList<RssItem>();
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while ( reader.moveToStartElement( ITEM_NAME, COLLECTION_NAME ) )
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Map<String, String> data = reader.readElements( ITEM_NAME );
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RssItem item = new RssItem();
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item.setTitle( data.get( FIELD_TITLE ) );
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item.setLink( data.get( FIELD_LINK ) );
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item.setDate( data.get( FIELD_DATE ) );
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item.setDescription( data.get( FIELD_DESCRIPTION ) );
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return items.subList( 0, getMax( items.size(), MAX_ITEMS ) );
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catch ( MalformedURLException ex )
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throw new RuntimeException( "Malformed RSS URL", ex );
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catch ( IOException ex )
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log.error( "Error while reading RSS, you are probably not connected to the internet", ex );
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return new ArrayList<RssItem>();