com.w20e.socrates.workflow.MappingFactory.java Source code

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Here is the source code for com.w20e.socrates.workflow.MappingFactory.java

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/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * You should have received a copy of the GNU General Public License
 * (for example /usr/src/linux/COPYING); if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

package com.w20e.socrates.workflow;

import org.apache.commons.digester3.AbstractObjectCreationFactory;
import org.xml.sax.Attributes;

/**
 * Factory for creating Mapping objects.
 *
 * @author <a href="mailto:dokter@wyldebeast">Duco Dokter</a>
 * @version 1.0
 */
public class MappingFactory extends AbstractObjectCreationFactory<Mapping> {

    /**
     * Create a new Mapping object. This will only work if the
     * attributes provided as argument contains a non-null, non-empty
     * value for 'from', 'to' and 'condition'.
     *
     * @param attrs an <code>Attributes</code> value
     * @return an <code>Object</code> value
     * @exception Exception if an error occurs
     */
    public final Mapping createObject(final Attributes attrs) throws Exception {

        if (attrs.getValue("from") == null || attrs.getValue("to") == null || attrs.getValue("condition") == null
                || "".equals(attrs.getValue("from")) || "".equals(attrs.getValue("to"))
                || "".equals(attrs.getValue("condition"))) {
            throw new Exception("No from, to or condition specified!");
        }

        return new Mapping(ActionFactory.getAction(attrs.getValue("from")),
                ActionFactory.getAction(attrs.getValue("to")), attrs.getValue("condition"));
    }
}