/**
* Licensed to the Austrian Association for Software Tool Integration (AASTI)
* under one or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information regarding copyright
* ownership. The AASTI licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.openengsb.connector.wicketacl.internal;
import java.util.Collection;
import java.util.Iterator;
import org.apache.commons.lang.ObjectUtils;
import org.openengsb.connector.wicketacl.WicketPermission;
import org.openengsb.core.api.AliveState;
import org.openengsb.core.api.context.ContextHolder;
import org.openengsb.core.api.security.model.SecurityAttributeEntry;
import org.openengsb.core.api.security.service.UserDataManager;
import org.openengsb.core.api.security.service.UserNotFoundException;
import org.openengsb.core.common.AbstractOpenEngSBConnectorService;
import org.openengsb.domain.authorization.AuthorizationDomain;
import org.openengsb.ui.api.UIAction;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.collect.Collections2;
import com.google.common.collect.Iterators;
public class WicketAclServiceImpl extends AbstractOpenEngSBConnectorService implements
AuthorizationDomain {
private static final Logger LOGGER = LoggerFactory.getLogger(WicketAclServiceImpl.class);
private UserDataManager userManager;
public WicketAclServiceImpl() {
}
public WicketAclServiceImpl(UserDataManager userManager) {
this.userManager = userManager;
}
@Override
public AliveState getAliveState() {
if (userManager == null) {
return AliveState.OFFLINE;
}
return AliveState.ONLINE;
}
@Override
public Access checkAccess(String user, Object object) {
if (!(object instanceof UIAction)) {
return Access.ABSTAINED;
}
UIAction actionData = (UIAction) object;
if (actionData.getSecurityAttributes() == null) {
return Access.ABSTAINED;
}
if (hasAccess(user, actionData)) {
return Access.GRANTED;
}
return Access.ABSTAINED;
}
private boolean hasAccess(String user, final UIAction actionData) {
Collection<WicketPermission> wicketPermissions;
try {
wicketPermissions = getWicketPermissions(user);
} catch (UserNotFoundException e) {
LOGGER.warn("user not found", e);
return false;
}
Iterator<WicketPermission> filtered = filterByContext(wicketPermissions);
Collection<String> relevantComponentNames = getRelevantComponentNames(actionData);
for (final String a : relevantComponentNames) {
boolean allowed = Iterators.any(filtered, new Predicate<WicketPermission>() {
@Override
public boolean apply(WicketPermission input) {
if (ObjectUtils.notEqual(a, input.getComponentName())) {
return false;
}
if (actionData.getAction() == null) {
return true;
}
if (input.getAction() == null || input.getAction().equals("ENABLE")) {
return true;
}
return input.getAction().equals(actionData.getAction());
}
});
if (allowed) {
return true;
}
}
return false;
}
private Iterator<WicketPermission> filterByContext(Collection<WicketPermission> wicketPermissions) {
return Iterators.filter(wicketPermissions.iterator(), new Predicate<WicketPermission>() {
@Override
public boolean apply(WicketPermission permission) {
String context = permission.getContext();
if (context != null && !context.equals(ContextHolder.get().getCurrentContextId())) {
return false;
}
return true;
}
});
}
private Collection<String> getRelevantComponentNames(UIAction actionData) {
Collection<SecurityAttributeEntry> allAttributes = actionData.getSecurityAttributes();
Collection<SecurityAttributeEntry> filtered =
Collections2.filter(allAttributes, new Predicate<SecurityAttributeEntry>() {
@Override
public boolean apply(SecurityAttributeEntry input) {
return ObjectUtils.equals(input.getKey(), "org.openengsb.ui.component");
}
});
return Collections2.transform(filtered, new Function<SecurityAttributeEntry, String>() {
@Override
public String apply(SecurityAttributeEntry input) {
return input.getValue();
}
});
}
public Collection<WicketPermission> getWicketPermissions(String user) throws UserNotFoundException {
return userManager.getAllPermissionsForUser(user, WicketPermission.class);
}
public void setUserManager(UserDataManager userManager) {
this.userManager = userManager;
}
}