net.java.trueupdate.jax.rs.server.UpdateServiceExceptionMapper Maven / Gradle / Ivy

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Provides a RESTful web service implementation for artifact updates.

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/*
 * Copyright (C) 2013 Stimulus Software & Schlichtherle IT Services.
 * All rights reserved. Use is subject to license terms.
 */
package net.java.trueupdate.jax.rs.server;

import javax.annotation.concurrent.Immutable;
import javax.ws.rs.Produces;
import javax.ws.rs.core.*;
import static javax.ws.rs.core.MediaType.*;
import javax.ws.rs.core.Response.ResponseBuilder;
import javax.ws.rs.ext.*;
import javax.xml.bind.JAXBElement;
import javax.xml.namespace.QName;
import net.java.trueupdate.jax.rs.util.UpdateServiceException;

/**
 * Maps an update service exception to a HTTP response.
 *
 * @author Christian Schlichtherle
 */
@Provider
@Produces({ APPLICATION_JSON, APPLICATION_XML, TEXT_XML, TEXT_PLAIN })
@Immutable
public final class UpdateServiceExceptionMapper
implements ExceptionMapper {

    private static final String MESSAGE = "message";

    private static final QName message = new QName(MESSAGE);

    @Context
    private HttpHeaders headers;

    @Override
    public Response toResponse(final UpdateServiceException ex) {
        final String msg = ex.getMessage();
        final MediaType mt = headers.getMediaType();
        final ResponseBuilder rb = Response.status(ex.getStatus());
        if (APPLICATION_JSON_TYPE.equals(mt))
            rb.type(APPLICATION_JSON_TYPE)
              .entity('"' + msg + '"');
        else if (APPLICATION_XML_TYPE.equals(mt))
            rb.type(APPLICATION_XML_TYPE)
              .entity(new JAXBElement(message, String.class, msg));
        else if (TEXT_XML_TYPE.equals(mt))
            rb.type(TEXT_XML_TYPE)
              .entity(new JAXBElement(message, String.class, msg));
        else
            rb.type(TEXT_PLAIN_TYPE)
              .entity(msg);
        return rb.build();
    }
}