/*
* Copyright 2012 Red Hat, Inc. and/or its affiliates.
*
* 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.jbpm.services.task.utils;
import java.io.IOException;
import java.io.Reader;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import org.drools.core.util.MVELSafeHelper;
import org.jbpm.services.task.internals.lifecycle.Allowed;
import org.jbpm.services.task.internals.lifecycle.OperationCommand;
import org.kie.api.command.Command;
import org.kie.api.task.model.OrganizationalEntity;
import org.kie.api.task.model.Status;
import org.kie.internal.task.api.TaskModelFactory;
import org.kie.internal.task.api.TaskModelProvider;
import org.kie.internal.task.api.UserInfo;
import org.kie.internal.task.api.model.AccessType;
import org.kie.internal.task.api.model.AllowedToDelegate;
import org.kie.internal.task.api.model.CommandName;
import org.kie.internal.task.api.model.NotificationType;
import org.kie.internal.task.api.model.Operation;
import org.kie.internal.task.api.model.SubTasksStrategy;
import org.mvel2.MVEL;
import org.mvel2.ParserConfiguration;
import org.mvel2.ParserContext;
/**
*
*/
public class MVELUtils {
private static Map<String, Class<?>> inputs = new HashMap<String, Class<?>>();
private static TaskModelFactory factory = TaskModelProvider.getFactory();
public static Map<String, Class<?>> getInputs() {
synchronized (inputs) {
if (inputs.isEmpty()) {
// org.jbpm.services.task
inputs.put("AccessType", AccessType.class);
inputs.put("AllowedToDelegate", AllowedToDelegate.class);
inputs.put("Attachment", factory.newAttachment().getClass());
inputs.put("BooleanExpression", factory.newBooleanExpression().getClass());
inputs.put("Comment", factory.newComment().getClass());
inputs.put("Content", factory.newContent().getClass());
inputs.put("Deadline", factory.newDeadline().getClass());
inputs.put("Deadlines", factory.newDeadlines().getClass());
inputs.put("Delegation", factory.newDelegation().getClass());
inputs.put("EmailNotification", factory.newEmialNotification().getClass());
inputs.put("EmailNotificationHeader", factory.newEmailNotificationHeader().getClass());
inputs.put("Escalation", factory.newEscalation().getClass());
inputs.put("Group", factory.newGroup().getClass());
inputs.put("I18NText", factory.newI18NText().getClass());
inputs.put("Notification", factory.newNotification().getClass());
inputs.put("NotificationType", NotificationType.class);
inputs.put("OrganizationalEntity", OrganizationalEntity.class);
inputs.put("PeopleAssignments", factory.newPeopleAssignments().getClass());
inputs.put("Reassignment", factory.newReassignment().getClass());
inputs.put("Status", Status.class);
inputs.put("Task", factory.newTask().getClass());
inputs.put("TaskData", factory.newTaskData().getClass());
inputs.put("User", factory.newUser().getClass());
inputs.put("UserInfo", UserInfo.class);
inputs.put("SubTasksStrategy",SubTasksStrategy.class);
inputs.put("Language", factory.newLanguage().getClass());
// org.jbpm.services.task.service
inputs.put("Allowed", Allowed.class);
inputs.put("Command", Command.class);
inputs.put("CommandName", CommandName.class);
inputs.put("ContentData", factory.newContentData().getClass());
inputs.put("Operation", Operation.class);
inputs.put("Operation.Claim", Operation.class);
inputs.put("Operation.Delegate", Operation.class);
inputs.put("OperationCommand", OperationCommand.class);
// org.drools.task.query
inputs.put("DeadlineSummary", factory.newDeadline().getClass());
inputs.put("TaskSummary", factory.newTaskSummary().getClass());
}
return inputs;
}
}
public static Object eval(Reader reader, Map<String, Object> vars) {
try {
return eval(toString(reader), vars);
} catch (IOException e) {
throw new RuntimeException("Exception Thrown",e);
}
}
public static Object eval(Reader reader) {
try {
return eval(toString(reader), null);
} catch (IOException e) {
throw new RuntimeException("Exception Thrown",e);
}
}
public static Object eval(String str, Map<String, Object> vars) {
ParserConfiguration pconf = new ParserConfiguration();
pconf.addPackageImport("org.jbpm.services.task");
// pconf.addPackageImport("org.jbpm.services.task.service");
pconf.addPackageImport("org.jbpm.services.task.query");
pconf.addPackageImport("java.util");
for(String entry : getInputs().keySet()){
pconf.addImport(entry, getInputs().get(entry));
}
ParserContext context = new ParserContext(pconf);
Serializable s = MVEL.compileExpression(str.trim(), context);
if( vars != null ) {
return MVELSafeHelper.getEvaluator().executeExpression(s, vars);
}
else {
return MVELSafeHelper.getEvaluator().executeExpression(s);
}
}
public static String toString(Reader reader) throws IOException {
int charValue ;
StringBuffer sb = new StringBuffer(1024);
while ((charValue = reader.read()) != -1) {
sb.append((char) charValue);
}
return sb.toString();
}
}