D-Net

package eu.dnetlib.data.mapreduce.hbase.index.config;

import java.io.StringReader;

import java.lang.reflect.Type;

import java.util.HashMap;

import java.util.List;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Node;

import org.dom4j.io.SAXReader;

import com.google.common.collect.Lists;

import com.google.gson.Gson;

import com.google.gson.reflect.TypeToken;

public class ContextMapper extends HashMap<String, ContextDef> {

	private static final long serialVersionUID = 2159682308502487305L;

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

	private final Type token = new TypeToken<List<ContextDef>>() {}.getType();

	@SuppressWarnings("unchecked")

	public void fromJson(final String json) {

		super.clear();

		if ((json != null) && !json.isEmpty()) {

			for (ContextDef def : (List<ContextDef>) new Gson().fromJson(json, token)) {

				super.put(def.getId(), def);

			}

		} else {

			log.warn("unable to inizialize, empty source json string");

		}

	}

	public static ContextMapper fromXml(final String xml) throws DocumentException {

		final ContextMapper contextMapper = new ContextMapper();

		Document doc = new SAXReader().read(new StringReader(xml));

		for (Object o : doc.selectNodes("//entry")) {

			Node node = (Node) o;

			String id = node.valueOf("./@id");

			String label = node.valueOf("./@label");

			String name = node.valueOf("./@name");

			String type = node.valueOf("./@type") + "";

			contextMapper.put(id, new ContextDef(id, label, name, type));

		}

		return contextMapper;

	}

	@Override

	public String toString() {

		return new Gson().toJson(Lists.newArrayList(this.values()));

	}

}