CorpusDocumentOOPAnnotationSubannotation.java

package io.outofprintmagazine.web.rest.browse;

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

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ObjectNode;

import io.outofprintmagazine.web.servlets.AbstractOOPCacheableServlet;

@Path("/Corpora/{Corpus}/{Document}/OOP/{Annotation}/{Subannotation}")
public class CorpusDocumentOOPAnnotationSubannotation extends AbstractOOPCacheableServlet  {

	private static final long serialVersionUID = 1L;
	@Context
	private ServletConfig servletConfig;
	@Context
	private ServletContext servletContext;
	@Context
	private HttpServletRequest httpServletRequest;
	@Context
	private HttpServletResponse httpServletResponse;
    
    @GET
    @Produces("application/json; charset=utf-8")
	public String doGet(
			@PathParam("Corpus") String corpus,
			@PathParam("Document") String document,
			@PathParam("Annotation") String annotation,
			@PathParam("Subannotation") String subannotation
			) throws JsonProcessingException, IOException, ServletException
    {
    	if (getStorage() == null) {
    		super.init(servletConfig);
    	}
	
		ObjectNode retval = getMapper().createObjectNode();
		JsonNode oop = getStorage().getCorpusDocumentOOPJson(corpus, document);
		if (oop.hasNonNull(annotation)) {
			JsonNode annotationNode = oop.get(annotation);
			if (annotationNode.isObject()) {
				ObjectNode o = (ObjectNode)annotationNode;
				if (o.hasNonNull(subannotation)) {
					retval.set(subannotation, o.get(subannotation));
				}
			}
			else if (annotationNode.isArray()) {
				ArrayNode o = (ArrayNode)annotationNode;
				Iterator<JsonNode> annotationListIter = o.iterator();
				while (annotationListIter.hasNext()) {
					JsonNode subannotationNode = annotationListIter.next();
					if (subannotationNode.hasNonNull("name") && subannotationNode.get("name").asText().equals(subannotation)) {
						retval.set(subannotation, subannotationNode);
						break;
					}
				}
			}
		}

		return getMapper().writeValueAsString(retval);
	}

}