RESTv1VersionHeaderInterceptor.java

/*
  Copyright 2011-2014 Red Hat, Inc

  This file is part of PressGang CCMS.

  PressGang CCMS is free software: you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  PressGang CCMS is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with PressGang CCMS.  If not, see <http://www.gnu.org/licenses/>.
*/

package org.jboss.pressgang.ccms.server.rest.v1.interceptor;

import javax.ws.rs.ext.Provider;
import java.lang.reflect.Method;

import org.jboss.pressgang.ccms.rest.v1.constants.RESTv1Constants;
import org.jboss.pressgang.ccms.rest.v1.jaxrsinterfaces.RESTInterfaceV1;
import org.jboss.pressgang.ccms.server.rest.v1.RESTv1;
import org.jboss.pressgang.ccms.utils.common.VersionUtilities;
import org.jboss.resteasy.annotations.interception.ServerInterceptor;
import org.jboss.resteasy.core.ServerResponse;
import org.jboss.resteasy.spi.interception.AcceptedByMethod;
import org.jboss.resteasy.spi.interception.PostProcessInterceptor;

@Provider
@ServerInterceptor
public class RESTv1VersionHeaderInterceptor implements PostProcessInterceptor, AcceptedByMethod {
    @Override
    public boolean accept(final Class declaring, final Method method) {
        // Only use this interceptor for v1 endpoints.
        return RESTv1.class.equals(declaring);
    }

    @Override
    public void postProcess(ServerResponse response) {
        response.getMetadata().add(RESTv1Constants.X_PRESSGANG_VERSION_HEADER, VersionUtilities.getAPIVersion(RESTInterfaceV1.class));
    }
}