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• RedmineDateHandler.java

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org.redmine.ta.internal.RedmineDateHandler Maven / Gradle / Ivy

/*
   Copyright 2010-2011 Alexey Skorokhodov.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
package org.redmine.ta.internal;

import java.text.ParseException;
import java.util.Date;

import org.exolab.castor.mapping.GeneralizedFieldHandler;

public abstract class RedmineDateHandler extends GeneralizedFieldHandler {

    public abstract Date getDate(String str) throws ParseException;

    public abstract String getString(Date date);

    /**
     * This method is used to convert the value when the getValue method is
     * called. The getValue method will obtain the actual field value from given
     * 'parent' object. This convert method is then invoked with the field's
     * value. The value returned from this method will be the actual value
     * returned by getValue method.
     *
     * @param value the object value to convert after performing a get operation
     * @return the converted value.
     */
    @Override
    public Object convertUponGet(Object value) {
        if (value == null)
            return null;
        Date date = (Date) value;
        return getString(date);
    }

    /**
     * This method is used to convert the value when the setValue method is
     * called. The setValue method will call this method to obtain the converted
     * value. The converted value will then be used as the value to set for the
     * field.
     *
     * @param value the object value to convert before performing a set operation
     * @return the converted value.
     */
    @Override
    public Object convertUponSet(Object value) {
        Date date = null;
        try {
            if (((String) value).length() > 0) {
                date = getDate((String) value);
            }
        } catch (ParseException px) {
            throw new IllegalArgumentException(px.getMessage());
        }
        return date;
    }

    /**
     * Returns the class type for the field that this GeneralizedFieldHandler
     * converts to and from. This should be the type that is used in the object
     * model.
     *
     * @return the class type of of the field
     */
    @Override
    public Class getFieldType() {
        return Date.class;
    }

    /**
     * Creates a new instance of the object described by this field.
     *
     * @param parent The object for which the field is created
     * @return A new instance of the field's value
     * @throws IllegalStateException This field is a simple type and cannot be instantiated
     */
    @Override
    public Object newInstance(Object parent) throws IllegalStateException {
        // -- Since it's marked as a string...just return null,
        // -- it's not needed.
        return null;
    }

}