/*
* Copyright 2004,2005 The Apache Software Foundation.
*
* Licensed 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.wso2.carbon.event.core.internal.util;
import org.apache.axiom.om.OMElement;
import org.apache.axis2.databinding.utils.ConverterUtil;
import org.wso2.carbon.context.CarbonContext;
import org.wso2.carbon.event.core.exception.EventBrokerConfigurationException;
import org.wso2.carbon.event.core.exception.EventBrokerException;
import org.wso2.carbon.event.core.subscription.Subscription;
import org.wso2.carbon.event.core.util.EventBrokerConstants;
import org.wso2.carbon.registry.core.Resource;
import org.wso2.carbon.user.api.UserStoreException;
import org.wso2.carbon.utils.ServerConstants;
import javax.xml.namespace.QName;
import java.util.Date;
import java.util.Enumeration;
import java.util.Properties;
/**
* some utility classes.
*/
public class JavaUtil {
/**
* returns an object with the type of attibute class.
*
* @param omElement
* @return
* @throws org.wso2.carbon.event.core.exception.EventBrokerConfigurationException
*
*/
public static Object getObject(OMElement omElement) throws EventBrokerConfigurationException {
String className =
omElement.getAttributeValue(new QName(null,
EventBrokerConstants.EB_CONF_ATTR_CLASS));
try {
Class factoryClass = Class.forName(className);
return factoryClass.newInstance();
} catch (ClassNotFoundException e) {
throw new EventBrokerConfigurationException("Class " + className + " not found ", e);
} catch (IllegalAccessException e) {
throw new EventBrokerConfigurationException("Class not be accesed ", e);
} catch (InstantiationException e) {
throw new EventBrokerConfigurationException("Class not be instantiated ", e);
}
}
public static String getValue(OMElement omElement, String localPart) {
OMElement childElement =
omElement.getFirstChildWithName(
new QName(omElement.getNamespace().getNamespaceURI(), localPart));
return childElement.getText();
}
/**
* creates the subscription object from the subscription resource
*
* @param subscriptionResource
* @return
*/
public static Subscription getSubscription(Resource subscriptionResource) {
Subscription subscription = new Subscription();
Properties properties = subscriptionResource.getProperties();
if ((properties != null) && (!properties.isEmpty())) {
for (Enumeration enumeration = properties.propertyNames(); enumeration.hasMoreElements();) {
String propertyName = (String) enumeration.nextElement();
if (EventBrokerConstants.EB_RES_SUBSCRIPTION_URL.equals(propertyName)) {
subscription.setEventSinkURL(
subscriptionResource.getProperty(EventBrokerConstants.EB_RES_SUBSCRIPTION_URL));
} else if (EventBrokerConstants.EB_RES_EVENT_DISPATCHER_NAME.equals(propertyName)) {
subscription.setEventDispatcherName(
subscriptionResource.getProperty(EventBrokerConstants.EB_RES_EVENT_DISPATCHER_NAME));
} else if (EventBrokerConstants.EB_RES_EXPIRS.equals(propertyName)) {
subscription.setExpires(
ConverterUtil.convertToDateTime(
subscriptionResource.getProperty(EventBrokerConstants.EB_RES_EXPIRS)));
} else if (EventBrokerConstants.EB_RES_OWNER.equals(propertyName)) {
subscription.setOwner(subscriptionResource.getProperty(EventBrokerConstants.EB_RES_OWNER));
} else if (EventBrokerConstants.EB_RES_TOPIC_NAME.equals(propertyName)) {
subscription.setTopicName(subscriptionResource.getProperty(EventBrokerConstants.EB_RES_TOPIC_NAME));
} else if (EventBrokerConstants.EB_RES_CREATED_TIME.equals(propertyName)) {
subscription.setCreatedTime(new Date(Long.parseLong(subscriptionResource.getProperty(EventBrokerConstants.EB_RES_CREATED_TIME))));
} else if (EventBrokerConstants.EB_RES_MODE.equals(propertyName)) {
subscription.setMode(subscriptionResource.getProperty(EventBrokerConstants.EB_RES_MODE));
} else {
subscription.addProperty(propertyName, subscriptionResource.getProperty(propertyName));
}
}
}
return subscription;
}
public static String getSubscriptionMode(String topicName) {
int length = topicName.length();
String modeSubstring = topicName.substring(length - 2);
if (modeSubstring.equals("/*")) {
return "mode_1";
} else if (modeSubstring.equals("/#")) {
return "mode_2";
} else {
return "mode_0";
}
}
/**
* Check if the given user has the admin role privileges
*
* @param username - the user to be checked for permissions
* @return - true if given user is a admin role owned user, false otherwise
* @throws EventBrokerException - if fails to get list of user roles
*/
public static boolean isAdmin(String username) throws EventBrokerException {
boolean isAdmin = false;
try {
String[] userRoles = EventBrokerHolder.getInstance().getRealmService().
getTenantUserRealm(CarbonContext.getCurrentContext().getTenantId()).
getUserStoreManager().getRoleListOfUser(username);
String adminRole =
EventBrokerHolder.getInstance().getRealmService().
getBootstrapRealmConfiguration().getAdminRoleName();
for (String userRole : userRoles) {
if (adminRole.equals(userRole)) {
isAdmin = true;
break;
}
}
} catch (UserStoreException e) {
throw new EventBrokerException("Failed to get list of user roles", e);
}
return isAdmin;
}
}