edu.cornell.mannlib.semservices.util.XMLGregorianCalendarConverter.java Source code

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Here is the source code for edu.cornell.mannlib.semservices.util.XMLGregorianCalendarConverter.java

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/*
    
 * $Id: XMLGregorianCalendarConverter.java 28642 2006-10-25 13:41:54Z jdamick $
 *
 * Copyright 2006- Revolution Health Group.  All rights reserved.
 *
 * This software is the confidential and proprietary information
 * of Revolution Health Group.  (Confidential Information).
 * You shall not disclose such Confidential Information and shall
 * use it only in accordance with the terms of the license
 * agreement you entered into with Revolution Health Group.
 *
 */

package edu.cornell.mannlib.semservices.util;

import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

import org.apache.commons.beanutils.ConversionException;
import org.apache.commons.beanutils.Converter;

public final class XMLGregorianCalendarConverter implements Converter {

    // Constructors

    /**
     * Create a {@link Converter} that will throw a {@link ConversionException}
     * if a conversion error occurs.
     */
    public XMLGregorianCalendarConverter() {
        this.defaultValue = null;
        this.useDefault = false;
    }

    /**
     * Create a {@link Converter} that will return the specified default value if
     * a conversion error occurs.
     *
     * @param defaultValue
     *           The default value to be returned
     */
    public XMLGregorianCalendarConverter(Object defaultValue) {
        this.defaultValue = defaultValue;
        this.useDefault = true;
    }

    // Instance Variables

    /**
     * The default value specified to our Constructor, if any.
     */
    private Object defaultValue = null;

    /**
     * Should we return the default value on conversion errors?
     */
    private boolean useDefault = true;

    // Public Methods

    /**
     * Convert the specified input object into an output object of the specified
     * type.
     *
     * @param type
     *  XMLGregorianCalendar type to which this value should be
     *  converted
     * @param value
     *  The input value to be converted
     *
     * @exception ConversionException
     *  if conversion cannot be performed successfully
     */
    @SuppressWarnings("unchecked")
    public Object convert(Class type, Object value) {

        if (value == null) {
            if (useDefault) {
                return (defaultValue);
            } else {
                throw new ConversionException("No value specified");
            }
        }

        if (value instanceof XMLGregorianCalendar) {
            return (value);
        }

        try {
            return DatatypeFactory.newInstance().newXMLGregorianCalendar(value.toString());
        } catch (Exception e) {
            if (useDefault) {
                return (defaultValue);
            } else {
                throw new ConversionException(e);
            }
        }
    }
}