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 *    Please make sure that third-party modules and libraries are used
 *    according to their respective licenses.
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package com.openexchange.groupware.contact.helpers;

import java.text.DateFormat;
import java.text.ParseException;
import java.util.LinkedList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.openexchange.groupware.contact.ContactException;
import com.openexchange.groupware.contact.ContactExceptionCodes;

/**
 * This switcher is able to convert a given String into a date using
 * SimpleDateFormat and then pass it on to its delegate.
 *
 * @author <a href="mailto:tobias.prinz@open-xchange.com">Tobias 'Tierlieb' Prinz</a>
 */
public class ContactSwitcherForSimpleDateFormat extends AbstractContactSwitcherWithDelegate {

    private static final Log LOG = LogFactory.getLog(ContactSwitcherForSimpleDateFormat.class);

    private final List<DateFormat> dateFormats = new LinkedList<DateFormat>();

    private Object[] makeDate(final Object... objects) throws ContactException {
        if (objects[1] instanceof String) {
            // Not parsed by previous ContactSwitcher
            for (final DateFormat dateFormat: dateFormats) {
                try {
                    objects[1] = dateFormat.parse((String) objects[1]);
                    return objects;
                } catch (final ParseException e) {
                    LOG.debug(e.getMessage());
                }
            }
            throw ContactExceptionCodes.DATE_CONVERSION_FAILED.create((String) objects[1]);
        }
        return objects;
    }

    public void addDateFormat(final DateFormat dateFormat) {
        dateFormats.add(dateFormat);
    }

    /* CHANGED METHODS */
    @Override
    public Object creationdate(final Object... objects) throws ContactException {
        try {
            return delegate.creationdate(makeDate(objects));
        } catch (final ClassCastException e) {
            throw ContactExceptionCodes.CONV_OBJ_2_DATE_FAILED.create(e, objects[1], "CreationDate");
        }
    }

    @Override
    public Object anniversary(final Object... objects) throws ContactException {
        try {
            return delegate.anniversary(makeDate(objects));
        } catch (final ClassCastException e) {
            throw ContactExceptionCodes.CONV_OBJ_2_DATE_FAILED.create(e, objects[1], "Anniversary");
        }
    }

    @Override
    public Object birthday(final Object... objects) throws ContactException {
        try {
            return delegate.birthday(makeDate(objects));
        } catch (final ClassCastException e) {
            throw ContactExceptionCodes.CONV_OBJ_2_DATE_FAILED.create(e, objects[1], "Birthday");
        }
    }

    @Override
    public Object imagelastmodified(final Object... objects) throws ContactException {
        try {
            return delegate.imagelastmodified(makeDate(objects));
        } catch (final ClassCastException e) {
            throw ContactExceptionCodes.CONV_OBJ_2_DATE_FAILED.create(e, objects[1], "ImageLastModified");
        }
    }

    @Override
    public Object lastmodified(final Object... objects) throws ContactException {
        try {
            return delegate.lastmodified(makeDate(objects));
        } catch (final ClassCastException e) {
            throw ContactExceptionCodes.CONV_OBJ_2_DATE_FAILED.create(e, objects[1], "LastModified");
        }
    }
}
