refprovider.java

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/*
 * Created on Jul 10, 2003
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package ar.com.koalas.providers;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

import org.apache.commons.jxpath.JXPathContext;
import org.xml.sax.SAXException;

/**
 * @author DZ156H
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class RefProvider extends ProviderImpl {
	private String refProvider;
	private String filter;
	
	public void setReference( String reference ){
		this.refProvider	= reference;
	}
	
	public void setFilter( String filter ){
		this.filter	= filter;
	}

	public Collection getCollection() throws ProviderException {
		try {
			Provider provider	= ProviderFactory.getInstance().getProvider( this.refProvider );
			JXPathContext context = JXPathContext.newContext( provider );
			Iterator iterator = context.iterate( this.filter );
			
			return this.getCollection( iterator );			
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	/**
	 * @param iterator
	 * @return
	 */
	private Collection getCollection(Iterator iterator){
		Collection arrayList	= new ArrayList();
		while( iterator.hasNext() ){
			arrayList.add( iterator.next() );
		}
		
		return arrayList;
	}

	public Object getDescription(Object id) throws ProviderException {
		try {
			return ProviderFactory.getInstance().getProvider(this.refProvider).getDescription( id );
		} catch (IOException e) {
			// XXX Auto-generated catch block
			e.printStackTrace();
		} catch (SAXException e) {
			// XXX Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
	
	public String getKeyName() {
		String retValue = super.getKeyName();
		if( retValue != null ){
			return retValue;
		}
		
		try {
			Provider provider = ProviderFactory.getInstance().getProvider(this.refProvider);
			return provider.getKeyName();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		}
		
		return null;
	}
	
	public String getDescription()  {
		String retValue = super.getKeyName();
		if( retValue != null ){
			return retValue;
		}

		try {
			Provider provider = ProviderFactory.getInstance().getProvider(this.refProvider);
			return provider.getDescription();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		}
		
		return null;
	}
}