org.ow2.bonita.util.hibernate.HibernateListCommand.java Source code

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Here is the source code for org.ow2.bonita.util.hibernate.HibernateListCommand.java

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/**
 * Copyright (C) 2010  BonitaSoft S.A.
 * BonitaSoft, 31 rue Gustave Eiffel - 38000 Grenoble
 * This library 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
 * version 2.1 of the License.
 * This library 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
 * program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA  02110-1301, USA.
 **/
package org.ow2.bonita.util.hibernate;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.hibernate.Query;
import org.hibernate.Session;
import org.ow2.bonita.env.Environment;
import org.ow2.bonita.util.Command;

public class HibernateListCommand<T> implements Command<List<T>> {

    private static final long serialVersionUID = -522051467458658712L;
    //"hibernate-session:core"
    private String sessionName;
    private String query;
    private Map<String, String> stringParameters;

    public HibernateListCommand(final String sessionName, final String query) {
        this.sessionName = sessionName;
        this.query = query;
    }

    protected void addStringParameter(String key, String value) {
        if (stringParameters == null) {
            stringParameters = new HashMap<String, String>();
        }
        stringParameters.put(key, value);
    }

    @SuppressWarnings("unchecked")
    public List<T> execute(Environment environment) throws Exception {
        Session session = (Session) environment.get(this.sessionName);

        Query query = session.createQuery(this.query);
        if (stringParameters != null) {
            for (Map.Entry<String, String> stringParameter : stringParameters.entrySet()) {
                query.setString(stringParameter.getKey(), stringParameter.getValue());
            }
        }
        query.setCacheable(true);
        List<T> result = new ArrayList<T>();
        result.addAll((Collection<T>) query.list());
        return result;
    }
}