SimpleProperty.java :  » J2EE » Expresso » com » jcorporate » expresso » kernel » metadata » Java Open Source

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Expresso » com » jcorporate » expresso » kernel » metadata » SimpleProperty.java
/* ====================================================================
 * The Jcorporate Apache Style Software License, Version 1.2 05-07-2002
 *
 * Copyright (c) 1995-2003 Jcorporate Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
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 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by Jcorporate Ltd.
 *        (http://www.jcorporate.com/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * 4. "Jcorporate" and product names such as "Expresso" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written permission,
 *    please contact info@jcorporate.com.
 *
 * 5. Products derived from this software may not be called "Expresso",
 *    or other Jcorporate product names; nor may "Expresso" or other
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 *    written permission of Jcorporate Ltd.
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 * 6. No product derived from this software may compete in the same
 *    market space, i.e. framework, without prior written permission
 *    of Jcorporate Ltd. For written permission, please contact
 *    partners@jcorporate.com.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Jcorporate Ltd. Contributions back
 * to the project(s) are encouraged when you make modifications.
 * Please send them to support@jcorporate.com. For more information
 * on Jcorporate Ltd. and its products, please see
 * <http://www.jcorporate.com/>.
 *
 * Portions of this software are based upon other open source
 * products and are subject to their respective licenses.
 */
package com.jcorporate.expresso.kernel.metadata;

import com.jcorporate.expresso.core.dbobj.ValidValue;
import com.jcorporate.expresso.kernel.Configuration;
import com.jcorporate.expresso.kernel.digester.ComponentConfig;
import com.jcorporate.expresso.kernel.internal.DefaultConfigBean;
import com.jcorporate.expresso.kernel.util.ClassLocator;
import org.apache.commons.beanutils.ConvertUtils;
import org.apache.log4j.Logger;

import java.util.ArrayList;
import java.util.List;

/**
 * Metadata class that represents a simple property for an Expresso component
 *
 * @author Michael Rimov
 * @version $Revision: 1.6 $ on  $Date: 2004/11/17 20:48:17 $
 */

public class SimpleProperty extends Property {
    List validValues;
    String value;

    /**
     * Default Constructor
     */
    public SimpleProperty() {
        super();
        validValues = new ArrayList();
    }

    /**
     * Set the value of the property
     *
     * @param value java.lang.String
     */
    public void setValue(String value) {
        this.value = value;
    }

    /**
     * Retrieve the value of the property
     *
     * @return java.lang.String
     */
    public String getValue() {
        return value;
    }

    /**
     * Add a valid value for the property
     *
     * @param key   the 'key' or internal value
     * @param value the friendly value to be displayed in management systems.
     */
    public void addValidValue(String key, String value) {
        ValidValue vv = new ValidValue(key, value);
        validValues.add(vv);
    }

    /**
     * Retrieve a list of valid values for this particular property.
     *
     * @return List of valid value objects
     */
    public List retrieveValidValues() {
        return validValues;
    }

    /**
     * Load the configBean with values for this property.
     * If there are any values present in the ComponentConfig, then use those properties,
     * if empty, use your own default values as specified in the ComponentMetadata
     *
     * @param targetBean The configBean to populate with this property.
     * @param config     the current configuration as loaded from the expresso config.xml file
     * @param metadata   the current metadata for this component
     * @return the Configuration interface (actually uslaly the configbean parameter)
     */
    public Configuration createConfigBean(DefaultConfigBean targetBean,
                                          ComponentConfig config,
                                          ComponentMetadata metadata) {
        String newValue = config.getProperty(this.getName());
        if (newValue == null || newValue.length() == 0) {
            newValue = this.getValue();
        }

        String type = this.getType();

        try {
            targetBean.set(this.getName(), ConvertUtils.convert(newValue, ClassLocator.loadClass(type)));
        } catch (ClassNotFoundException ex) {
            Logger log = Logger.getLogger(this.getClass());
            log.error("Error converting value " + value
                    + " to class : " + type + " class not found.", ex);
            throw new IllegalArgumentException("Class not found: " + type);
        }

        return targetBean;
    }

}
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