D-Net

package eu.dnetlib.msro.workflows.sarasvati.loader;

import java.io.File;

import java.io.FileOutputStream;

import java.io.StringReader;

import org.apache.commons.io.IOUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.io.SAXReader;

import org.springframework.beans.factory.annotation.Required;

import com.googlecode.sarasvati.Graph;

import com.googlecode.sarasvati.mem.MemEngine;

public class GraphLoader {

	private MemEngine engine;

	private static final Log log = LogFactory.getLog(GraphLoader.class);

	public Graph loadGraph(String xml) throws Exception {

		final File tmpFile = File.createTempFile("wftfs", null);

		try {

			IOUtils.copy(new StringReader(xml), new FileOutputStream(tmpFile));

			SAXReader reader = new SAXReader();

			Document doc = reader.read(tmpFile);

			String graphName = doc.valueOf("/process-definition/@name");

			getEngine().getLoader().load(tmpFile);

			final Graph graph = getEngine().getRepository().getLatestGraph(graphName);

			if (graph == null) {

				throw new IllegalArgumentException("graph called " + graphName + " doesn't exist");

			}

			return graph;

		} catch (DocumentException e) {

			log.error("Error parsing xml: " + xml, e);

			throw e;

		} finally {

			tmpFile.delete();

		}

	}

	public MemEngine getEngine() {

		return engine;

	}

	@Required

	public void setEngine(MemEngine engine) {

		this.engine = engine;

	}

}