package pt.utl.ist.fenix.tools.file.dspace;

import java.io.Serializable;
import java.util.Collection;
import java.util.List;
import java.util.ArrayList;

import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.tree.BaseElement;

import pt.utl.ist.fenix.tools.file.FileSetMetaData;
import pt.utl.ist.fenix.tools.file.XMLSerializable;

public class ChangeItemMetaDataRequest implements Serializable,XMLSerializable {

	String itemHandler;
	Collection<FileSetMetaData> metaData;
	
	public ChangeItemMetaDataRequest() {
		super();
	}
	
	public ChangeItemMetaDataRequest(String itemHandler, Collection<FileSetMetaData> metaData) {
		this();
		this.itemHandler = itemHandler;
		this.metaData  = metaData;
	}
	
	
	public String getItemHandler() {
		return itemHandler;
	}


	public void setItemHandler(String itemHandler) {
		this.itemHandler = itemHandler;
	}


	public Collection<FileSetMetaData> getMetaData() {
		return metaData;
	}


	private void addMetaDataElement(FileSetMetaData metaDataElement) {
		if(this.metaData==null) {
			this.metaData = new ArrayList<FileSetMetaData>();
		}
		this.metaData.add(metaDataElement);
	}
	
	public void setMetaData(Collection<FileSetMetaData> metaData) {
		this.metaData = metaData;
	}


	   public String toXMLString() {
	    	return toXML().asXML();
	    }
	    
	    public Element toXML()
	    {
	        Element fileSetPermissionChangeElement = new BaseElement("itemMetaDataRequest");

	        fileSetPermissionChangeElement.addElement("itemHandler").setText(getItemHandler());
	        Element metaDataElement = fileSetPermissionChangeElement.addElement("metaData");
	        for(FileSetMetaData metaData : getMetaData()) {
	        	metaDataElement.add(metaData.toXML());
	        }
	        
	        return fileSetPermissionChangeElement;
	    	
	    }

	    public static ChangeItemMetaDataRequest createFromXml(String xml) {
	    	ChangeItemMetaDataRequest request = new ChangeItemMetaDataRequest();
	        request.fromXMLString(xml);
	        return request;
	    }

	    
	    public void fromXMLString(String xml) {
	        try {
	            fromXML(DocumentHelper.parseText(xml).getRootElement());
	        } catch (DocumentException e) {
	            throw new RuntimeException(e);
	        }
	    }
	    
	    public void fromXML(Element xmlElement)
	    {
	    	this.itemHandler = xmlElement.element("itemHandler").getText();
	    	for(Element element : (List<Element>)xmlElement.element("metaData").elements("filesetmetadata")) {
	    		FileSetMetaData metaDataElement = new FileSetMetaData();
	    		metaDataElement.fromXML(element);
	    		addMetaDataElement(metaDataElement);
	    	}
	    }
	
}