org.jbpm.pvm.internal.query.JobQueryImpl.java Source code

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Here is the source code for org.jbpm.pvm.internal.query.JobQueryImpl.java

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package org.jbpm.pvm.internal.query;

/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
import java.util.List;

import org.hibernate.LockMode;
import org.hibernate.Query;
import org.jbpm.api.JobQuery;
import org.jbpm.api.job.Job;
import org.jbpm.pvm.internal.job.JobImpl;
import org.jbpm.pvm.internal.job.MessageImpl;
import org.jbpm.pvm.internal.job.TimerImpl;
import org.jbpm.pvm.internal.query.AbstractQuery;
import org.jbpm.pvm.internal.query.Page;

/**
 * @author Tom Baeyens
 */
public class JobQueryImpl extends AbstractQuery implements JobQuery {

    private static final long serialVersionUID = 1L;

    protected boolean messagesOnly = false;
    protected boolean timersOnly = false;
    protected String processInstanceId = null;
    protected Boolean exception;

    public String hql() {
        StringBuilder hql = new StringBuilder();

        hql.append("select ");
        if (count) {
            hql.append("count(j) ");
        } else {
            hql.append("j ");
        }

        hql.append("from ");
        if (messagesOnly) {
            hql.append(MessageImpl.class.getName());
        } else if (timersOnly) {
            hql.append(TimerImpl.class.getName());
        } else {
            hql.append(JobImpl.class.getName());
        }
        hql.append(" j ");

        if (processInstanceId != null) {
            appendWhereClause("j.processInstance.id = '" + processInstanceId + "' ", hql);
        }

        if (exception != null) {
            if (exception) {
                appendWhereClause("j.exception is not null ", hql);
            } else {
                appendWhereClause("j.exception is null ", hql);
            }
        }
        appendOrderByClause(hql);
        return hql.toString();
    }

    protected void applyParameters(Query query) {
        query.setLockMode("j", LockMode.NONE);
    }

    public List<Job> list() {
        return (List<Job>) untypedList();
    }

    public Job uniqueResult() {
        return (Job) untypedUniqueResult();
    }

    public JobQuery messages() {
        this.messagesOnly = true;
        return this;
    }

    public JobQuery timers() {
        this.timersOnly = true;
        return this;
    }

    public JobQuery exception(boolean hasException) {
        this.exception = hasException;
        return this;
    }

    public JobQuery orderAsc(String property) {
        addOrderByClause("j." + property + " asc");
        return this;
    }

    public JobQuery orderDesc(String property) {
        addOrderByClause("j." + property + " desc");
        return this;
    }

    public JobQuery page(int firstResult, int maxResults) {
        this.page = new Page(firstResult, maxResults);
        return this;
    }

    public JobQuery processInstanceId(String processInstanceId) {
        this.processInstanceId = processInstanceId;
        return this;
    }
}