/**
* OLAT - Online Learning and Training<br>
* http://www.olat.org
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Copyright (c) since 2004 at Multimedia- & E-Learning Services (MELS),<br>
* University of Zurich, Switzerland.
* <p>
*/
package org.olat.course.condition.interpreter;
import org.olat.core.id.Identity;
import org.olat.course.editor.CourseEditorEnv;
import org.olat.course.run.userview.UserCourseEnvironment;
/**
* Description:<BR/>
* Condition function isUser()
* Initial Date: Sep 15, 2004
* @author gnaegi
*/
public class IsUserFunction extends AbstractFunction {
public static final String name = "isUser";
/**
* @param userCourseEnv
*/
public IsUserFunction(UserCourseEnvironment userCourseEnv) {
super(userCourseEnv);
}
/**
* @see com.neemsoft.jmep.FunctionCB#call(java.lang.Object[])
*/
public Object call(Object[] inStack) {/*
* argument check
*/
if (inStack.length > 1) {
return handleException(new ArgumentParseException(ArgumentParseException.NEEDS_FEWER_ARGUMENTS, name, "", "error.fewerargs",
"solution.provideone.username"));
} else if (inStack.length < 1) { return handleException( new ArgumentParseException(ArgumentParseException.NEEDS_MORE_ARGUMENTS, name, "",
"error.moreargs", "solution.provideone.username")); }
/*
* argument type check
*/
if (!(inStack[0] instanceof String)) return handleException( new ArgumentParseException(ArgumentParseException.WRONG_ARGUMENT_FORMAT, name, "",
"error.argtype.username", "solution.example.name.infunction"));
String userName = (String)inStack[0];
/*
* expression check only if cev != null
*/
CourseEditorEnv cev = getUserCourseEnv().getCourseEditorEnv();
if (cev != null) {
// return a valid value to continue with condition evaluation test
return defaultValue();
}
Identity ident = getUserCourseEnv().getIdentityEnvironment().getIdentity();
String identName = ident.getName();
return identName.equals(userName) ? ConditionInterpreter.INT_TRUE: ConditionInterpreter.INT_FALSE;
}
protected Object defaultValue() {
return ConditionInterpreter.INT_TRUE;
}
}