de.dnb.oai.harvester.task.InMemoryOaiTaskStopRequestDao Maven / Gradle / Ivy

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A Java implementation of OAI-PMH 2.0 specification. See http://www.openarchives.org/pmh/
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/**********************************************************************
 * Class InMemoryOaiTaskStopRequestDao
 *  
 * Copyright (c) 2008-2012, German National Library / Deutsche Nationalbibliothek
 * Adickesallee 1, D-60322 Frankfurt am Main, Federal Republic of Germany 
 *
 * This program is free software.
 * 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.
 * 
 * Kadir Karaca Kocer -- German National Library
 * 
 **********************************************************************/

package de.dnb.oai.harvester.task;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import de.dnb.stm.task.TaskStopRequest;
import de.dnb.stm.task.TaskStopRequestDao;

/**
 * 
 * @author Matthias Neubauer
 */
public class InMemoryOaiTaskStopRequestDao implements TaskStopRequestDao
{
	private Map stopRequests = new LinkedHashMap();

	@Override
	public void deleteTaskStopRequest(TaskStopRequest taskStopRequest) {
		this.stopRequests.remove(new Long(taskStopRequest.getTaskStopRequestId()));
	}

	@Override
	public List findTaskStopRequestsByTaskId(
			Long taskId) {
		List  tl = new ArrayList();
		for (TaskStopRequest taskStopRequest : this.stopRequests.values()) {
			if(new Long(taskStopRequest.getTaskId()).equals(taskId)){
				tl.add(taskStopRequest);
			}
		}
		
		return tl;
	}

	@Override
	public TaskStopRequest getTaskStopRequest(Long taskStopRequestId) {
		return this.stopRequests.get(taskStopRequestId);
	}

	@Override
	public List getTaskStopRequestList() {
        if (this.stopRequests == null) return new ArrayList();
        if (this.stopRequests.isEmpty()) return  new ArrayList();
		return new ArrayList(this.stopRequests.values());
	}

	@Override
	public void saveTaskStopRequest(TaskStopRequest taskStopRequest) {
		if (taskStopRequest == null) {
	        throw new IllegalArgumentException("In InMemoryOaiTaskStopRequestDao.saveTaskStopRequest(): Illegal Argument: TaskStopRequest can not be NULL!");
	    }
	    if (taskStopRequest.getTaskStopRequestId() == 0){
	        // 0 -> First initialisation! We have to do some initialisation work:
	        // try to generate a unique id for this TaskStopRequest
	        ((OaiTaskStopRequest)taskStopRequest).setTaskStopRequestId(createUniqueNumber());
	    }
	    
		this.stopRequests.put(new Long(taskStopRequest.getTaskStopRequestId()), taskStopRequest);		
	}
	
	private static long createUniqueNumber() {
        // miliseconds + random number must be enough for our purpose
        long ms = System.currentTimeMillis();
        java.util.Random rnd = new java.util.Random();
        int r = (int) (rnd.nextFloat() * 10000);
        return ((ms * 10000) + r);
	}

}