/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* 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 version 2 of the License.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.enterprise.gui.util;
import javax.faces.application.FacesMessage;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.servlet.http.HttpSession;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.rhq.core.domain.auth.Subject;
import org.rhq.core.domain.resource.Resource;
import org.rhq.core.domain.resource.ResourceType;
import org.rhq.core.domain.resource.group.ResourceGroup;
import org.rhq.core.gui.util.FacesContextUtility;
import org.rhq.enterprise.gui.legacy.AttrConstants;
import org.rhq.enterprise.gui.legacy.ParamConstants;
import org.rhq.enterprise.gui.legacy.WebUser;
import org.rhq.enterprise.gui.legacy.util.SessionUtils;
import org.rhq.enterprise.server.resource.ResourceTypeNotFoundException;
import org.rhq.enterprise.server.util.LookupUtil;
/**
* @author Ian Springer
*/
public class EnterpriseFacesContextUtility {
public static WebUser getWebUser() {
FacesContext facesContext = FacesContextUtility.getFacesContext();
ExternalContext externalContext = facesContext.getExternalContext();
return SessionUtils.getWebUser((HttpSession) externalContext.getSession(false));
}
/**
* Returns information on the user that submitted the currently executing request. If none, an exception is thrown.
*
* @return Subject containing the user information
*/
@NotNull
public static Subject getSubject() {
return getWebUser().getSubject();
}
/**
* Returns the {@link Resource} associated with the current request. If none, an exception is thrown.
*
* @return resource associated with the request.
*/
@NotNull
public static Resource getResource() {
ExternalContext externalContext = FacesContextUtility.getFacesContext().getExternalContext();
Resource resource = (Resource) externalContext.getRequestMap().get(AttrConstants.RESOURCE_ATTR);
if (resource == null) {
int resourceId = FacesContextUtility.getOptionalRequestParameter(ParamConstants.CURRENT_RESOURCE_ID_PARAM,
Integer.class, -1);
if (resourceId == -1 && externalContext.getRequestServletPath().contains("/resource/")) {
resourceId = FacesContextUtility.getRequiredRequestParameter(ParamConstants.RESOURCE_ID_PARAM,
Integer.class);
// TODO: Instead call a manager method that returns a ResourceComposite, so we can stick the
// ResourceComposite in the request map, rather than just the Resource.
resource = LookupUtil.getResourceManager().getResourceById(EnterpriseFacesContextUtility.getSubject(),
resourceId);
externalContext.getRequestMap().put(AttrConstants.RESOURCE_ATTR, resource);
return resource;
}
} else {
return resource;
}
throw new IllegalStateException("Resource not found in the request params.");
}
/**
* Returns the {@link Resource} associated with the current request. If none, an exception is thrown.
*
* @return resource associated with the request.
*/
@NotNull
public static ResourceGroup getResourceGroup() {
ExternalContext externalContext = FacesContextUtility.getFacesContext().getExternalContext();
ResourceGroup resourceGroup = (ResourceGroup) externalContext.getRequestMap().get(
AttrConstants.RESOURCE_GROUP_ATTR);
if (resourceGroup == null) {
int resourceGroupId = FacesContextUtility.getRequiredRequestParameter(ParamConstants.GROUP_ID_PARAM,
Integer.class);
resourceGroup = LookupUtil.getResourceGroupManager().getResourceGroupById(getSubject(), resourceGroupId,
null);
externalContext.getRequestMap().put(AttrConstants.RESOURCE_GROUP_ATTR, resourceGroup);
}
return resourceGroup;
}
/**
* Returns the {@link Resource} associated with the current request or <code>null</code> if the request is not
* associated with a resource.
*
* @return resource associated with the request or <code>null</code> if none
*/
@Nullable
public static Resource getResourceIfExists() {
try {
return getResource();
} catch (Exception e) {
return null;
}
}
/**
* Returns the {@link ResourceType} associated with the current request. If none, an exception is thrown.
*
* @return ResourceType associated with the request.
*/
@NotNull
public static ResourceType getResourceType() {
ExternalContext externalContext = FacesContextUtility.getFacesContext().getExternalContext();
ResourceType resourceType = (ResourceType) externalContext.getRequestMap()
.get(AttrConstants.RESOURCE_TYPE_ATTR);
if (resourceType == null) {
int resourceTypeId = FacesContextUtility.getRequiredRequestParameter(ParamConstants.RESOURCE_TYPE_ID_PARAM,
Integer.class);
try {
Subject subject = EnterpriseFacesContextUtility.getSubject();
resourceType = LookupUtil.getResourceTypeManager().getResourceTypeById(subject, resourceTypeId);
externalContext.getRequestMap().put(AttrConstants.RESOURCE_TYPE_ATTR, resourceType);
} catch (ResourceTypeNotFoundException rtnfe) {
FacesContextUtility.addMessage(FacesMessage.SEVERITY_ERROR, "ResourceType with id=" + resourceTypeId
+ " does not exist");
}
}
return resourceType;
}
/**
* Returns the {@link ResourceType} associated with the current request or <code>null</code> if the request is not
* associated with a ResourceType.
*
* @return ResourceType associated with the request or <code>null</code> if none
*/
@Nullable
public static ResourceType getResourceTypeIfExists() {
try {
return getResourceType();
} catch (Exception e) {
return null;
}
}
}