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package com.sun.jersey.atom.abdera.impl.provider.entity;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import org.apache.abdera.Abdera;
import org.apache.abdera.model.Document;
import org.apache.abdera.model.Entry;
import org.apache.abdera.parser.Parser;

/**
 * <p>JAX-RS Provider for an Atom {@link Entry} Document instance.</p>
 */
//@Provider
@Consumes({"application/atom+xml", "application/xml", "text/xml", "application/atom+json", "application/json"})
@Produces({"application/atom+xml", "application/xml", "text/xml", "application/atom+json", "application/json"})
public class EntryProvider extends AbstractCompletableReaderWriter<Entry> {

    public long getSize(Entry entry, Class<?> type, Type genericType,
                        Annotation[] annotations, MediaType mediaType) {
        return -1;
    }

    public boolean isReadable(Class<?> type, Type genericType,
                              Annotation[] annotations, MediaType mediaType) {
        return Entry.class.isAssignableFrom(type);
    }

    public boolean isWriteable(Class<?> type, Type genericType,
                               Annotation[] annotations, MediaType mediaType) {
        return Entry.class.isAssignableFrom(type);
    }

    public Entry readFrom(Class<Entry> type, Type genericType,
                          Annotation[] annotations, MediaType mediaType,
                          MultivaluedMap<String, String> headers,
                          InputStream stream) throws IOException, WebApplicationException {
        Parser parser = null;
        if (mediaType.equals(MediaType.APPLICATION_JSON_TYPE) || mediaType.getSubtype().endsWith("+json")) {
            parser = Abdera.getInstance().getParserFactory().getParser("json");
        } else {
            parser = Abdera.getInstance().getParser();
        }
        Document<Entry> document = parser.parse(stream);
        return document.getRoot();
    }

    public void writeTo(Entry entry, Class<?> type, Type genericType,
                        Annotation[] annotations, MediaType mediaType,
                        MultivaluedMap<String, Object> headers,
                        OutputStream stream) throws IOException, WebApplicationException {
        if (mediaType.equals(MediaType.APPLICATION_JSON_TYPE) || mediaType.getSubtype().endsWith("+json")) {
            entry.writeTo("json", stream);
        } else {
            entry.writeTo(stream);
        }
    }

}
