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/*
* This program is a part of the IoTa Project.
*
* Copyright © 2012 Université de Caen Basse-Normandie, GREYC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
* <http://www.gnu.org/licenses/>
*
* See AUTHORS for a list of contributors.
*/
package fr.unicaen.iota.eta.query;

import fr.unicaen.iota.eta.constants.Constants;
import fr.unicaen.iota.eta.soap.IDedEPCISServicePortType;
import fr.unicaen.iota.tau.model.Identity;
import java.security.Principal;
import javax.annotation.Resource;
import javax.xml.ws.WebServiceContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.fosstrak.epcis.model.*;
import org.fosstrak.epcis.soap.*;

/**
* This class redirects the calls received from the Web service stack to the
* underlying QueryOperationsModule and ensures that any uncaught exception is
* properly catched and wrapped into an ImplementationExceptionResponse.
*/
//@WebService
public class IDedQueryOperationsWebService implements IDedEPCISServicePortType {

private static final Log LOG = LogFactory.getLog(IDedQueryOperationsWebService.class);
@Resource
private WebServiceContext wsContext;
protected QueryOperationsModule queryModule;
protected final Identity anonymous;

public IDedQueryOperationsWebService() {
anonymous = new Identity();
anonymous.setAsString(Constants.XACML_DEFAULT_USER);
}

public IDedQueryOperationsWebService(QueryOperationsModule queryModule) {
this();
this.queryModule = queryModule;
}

/**
* @return the queryModule
*/
public QueryOperationsModule getQueryModule() {
return queryModule;
}

/**
* @param queryModule the queryModule to set
*/
public void setQueryModule(QueryOperationsModule queryModule) {
this.queryModule = queryModule;
}

private void checkAuth(Identity id) throws SecurityExceptionResponse {
Principal authId = wsContext.getUserPrincipal();
if (authId == null || id == anonymous) {
return;
}
if (!queryModule.canBe(authId, id)) {
throw new SecurityExceptionResponse(authId.getName() + " isn't allowed to pass as " + id.getAsString());
}
}

/**
* @see
* org.fosstrak.epcis.soap.EPCISServicePortType#getSubscriptionIDs(org.fosstrak.epcis.model.GetSubscriptionIDs)
*/
@Override
public ArrayOfString iDedGetSubscriptionIDs(GetSubscriptionIDs req, Identity id) throws ImplementationExceptionResponse,
SecurityExceptionResponse, ValidationExceptionResponse, NoSuchNameExceptionResponse {
checkAuth(id);
ArrayOfString aos = new ArrayOfString();
aos.getString().addAll(queryModule.getSubscriptionIDs(req.getQueryName(), id.getAsString()));
return aos;
}

/**
* @see
* org.fosstrak.epcis.soap.EPCISServicePortType#poll(org.fosstrak.epcis.model.Poll)
*/
@Override
public QueryResults iDedPoll(Poll poll, Identity id) throws ImplementationExceptionResponse, QueryTooComplexExceptionResponse,
QueryTooLargeExceptionResponse, SecurityExceptionResponse, ValidationExceptionResponse,
NoSuchNameExceptionResponse, QueryParameterExceptionResponse {
checkAuth(id);
// log and wrap any error that is not one of the expected exceptions
try {
return queryModule.poll(poll.getQueryName(), poll.getParams(), id.getAsString());
} catch (ImplementationExceptionResponse e) {
throw e;
} catch (QueryTooComplexExceptionResponse e) {
throw e;
} catch (QueryTooLargeExceptionResponse e) {
throw e;
} catch (SecurityExceptionResponse e) {
throw e;
} catch (ValidationExceptionResponse e) {
throw e;
} catch (NoSuchNameExceptionResponse e) {
throw e;
} catch (QueryParameterExceptionResponse e) {
throw e;
} catch (Exception e) {
String msg = "Unexpected error occurred while processing request";
LOG.error(msg, e);
ImplementationException ie = new ImplementationException();
ie.setReason(msg);
ie.setSeverity(ImplementationExceptionSeverity.ERROR);
if (poll != null) {
ie.setQueryName(poll.getQueryName());
}
throw new ImplementationExceptionResponse(msg, ie, e);
}
}

/**
* @see
* org.fosstrak.epcis.soap.EPCISServicePortType#subscribe(org.fosstrak.epcis.model.Subscribe)
*/
@Override
public VoidHolder iDedSubscribe(Subscribe subscribe, Identity id) throws DuplicateSubscriptionExceptionResponse,
ImplementationExceptionResponse, QueryTooComplexExceptionResponse, SecurityExceptionResponse,
InvalidURIExceptionResponse, ValidationExceptionResponse, SubscribeNotPermittedExceptionResponse,
NoSuchNameExceptionResponse, SubscriptionControlsExceptionResponse, QueryParameterExceptionResponse {
checkAuth(id);
// log and wrap any error that is not one of the expected exceptions
try {
queryModule.subscribe(subscribe.getQueryName(), subscribe.getParams(), subscribe.getDest(),
subscribe.getControls(), subscribe.getSubscriptionID(), id.getAsString());
return new VoidHolder();
} catch (DuplicateSubscriptionExceptionResponse e) {
throw e;
} catch (ImplementationExceptionResponse e) {
throw e;
} catch (QueryTooComplexExceptionResponse e) {
throw e;
} catch (SecurityExceptionResponse e) {
throw e;
} catch (InvalidURIExceptionResponse e) {
throw e;
} catch (ValidationExceptionResponse e) {
throw e;
} catch (SubscribeNotPermittedExceptionResponse e) {
throw e;
} catch (NoSuchNameExceptionResponse e) {
throw e;
} catch (SubscriptionControlsExceptionResponse e) {
throw e;
} catch (QueryParameterExceptionResponse e) {
throw e;
} catch (Exception e) {
String msg = "Unknown error occurred while processing request";
LOG.error(msg, e);
ImplementationException ie = new ImplementationException();
ie.setReason(msg);
ie.setSeverity(ImplementationExceptionSeverity.ERROR);
if (subscribe != null) {
ie.setQueryName(subscribe.getQueryName());
ie.setSubscriptionID(subscribe.getSubscriptionID());
}
throw new ImplementationExceptionResponse(msg, ie, e);
}
}

/**
* @see
* org.fosstrak.epcis.soap.EPCISServicePortType#unsubscribe(org.fosstrak.epcis.model.Unsubscribe)
*/
@Override
public VoidHolder iDedUnsubscribe(Unsubscribe unsubscribe, Identity id) throws ImplementationExceptionResponse,
SecurityExceptionResponse, ValidationExceptionResponse, NoSuchSubscriptionExceptionResponse {
checkAuth(id);
// log and wrap any error that is not one of the expected exceptions
try {
queryModule.unsubscribe(unsubscribe.getSubscriptionID(), id.getAsString());
return new VoidHolder();
} catch (ImplementationExceptionResponse e) {
throw e;
} catch (SecurityExceptionResponse e) {
throw e;
} catch (NoSuchSubscriptionExceptionResponse e) {
throw e;
} catch (Exception e) {
String msg = "Unknown error occurred while processing request";
LOG.error(msg, e);
ImplementationException ie = new ImplementationException();
ie.setReason(msg);
ie.setSeverity(ImplementationExceptionSeverity.ERROR);
if (unsubscribe != null) {
ie.setSubscriptionID(unsubscribe.getSubscriptionID());
}
throw new ImplementationExceptionResponse(msg, ie, e);
}
}
}
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