/*
* Copyright 2015 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.audit.variable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.ServiceLoader;
import org.kie.api.task.model.Task;
import org.kie.internal.task.api.TaskVariable;
import org.kie.internal.task.api.TaskVariableIndexer;
/**
* Represents logic behind mechanism to index task variables.
* Supports custom indexers to be loaded dynamically via JDK ServiceLoader
*
* Adds default indexer (org.jbpm.services.task.audit.variable.StringTaskVariableIndexer) as the last indexer
* as it accepts all types
*
*/
public class TaskIndexerManager {
private static ServiceLoader<TaskVariableIndexer> taskVariableIndexers = ServiceLoader.load(TaskVariableIndexer.class);
private static TaskIndexerManager INSTANCE = new TaskIndexerManager();
private List<TaskVariableIndexer> indexers = new ArrayList<TaskVariableIndexer>();
private TaskIndexerManager() {
for (TaskVariableIndexer indexer : taskVariableIndexers) {
indexers.add(indexer);
}
// always add at the end the default one
indexers.add(new StringTaskVariableIndexer());
}
public List<TaskVariable> index(Task task, String variableName, Object variable) {
for (TaskVariableIndexer indexer : indexers) {
if (indexer.accept(variable)) {
List<TaskVariable> indexed = indexer.index(variableName, variable);
if (indexed != null) {
// populate all indexed variables with task information
for (TaskVariable taskVariable : indexed) {
taskVariable.setTaskId(task.getId());
taskVariable.setTaskId(task.getId());
taskVariable.setProcessInstanceId(task.getTaskData().getProcessInstanceId());
taskVariable.setProcessId(task.getTaskData().getProcessId());
taskVariable.setModificationDate(new Date());
}
return indexed;
}
}
}
return null;
}
public static TaskIndexerManager get() {
return INSTANCE;
}
}