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SEWOL provides support for the handling of workflow traces. Specifically it allows to specify the shape and content of process traces in terms of entries representing the execution of a specific workflow activity. SEWOL also allows to write these traces on disk as a log file with the help of a special file writer for process logs. Currently it supports plain text, Petrify, MXML and XES log file types. In order to specify security-related context information, SEWOL provides access control models such as access control lists (ACL) and role-based access control models (RBAC). All types of models can be conveniently edited with the help of appropriate dialogs.

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/*
 * OpenXES
 * 
 * The reference implementation of the XES meta-model for event 
 * log data management.
 * 
 * Copyright (c) 2009 Christian W. Guenther ([email protected])
 * 
 * 
 * LICENSE:
 * 
 * This code is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 * 
 * EXEMPTION:
 * 
 * The use of this software can also be conditionally licensed for
 * other programs, which do not satisfy the specified conditions. This
 * requires an exemption from the general license, which may be
 * granted on a per-case basis.
 * 
 * If you want to license the use of this software with a program
 * incompatible with the LGPL, please contact the author for an
 * exemption at the following email address: 
 * [email protected]
 * 
 */
package org.deckfour.xes.model.impl;

import java.util.Date;

import org.deckfour.xes.extension.XExtension;
import org.deckfour.xes.model.XAttribute;
import org.deckfour.xes.model.XAttributeTimestamp;

/**
 * This class implements timestamp type attributes.
 * 
 * @author Christian W. Guenther ([email protected])
 */
public class XAttributeTimestampImpl extends XAttributeImpl implements
		XAttributeTimestamp {

	/**
	 * Value of the attribute.
	 */
	private Date value;

	/**
	 * Creates a new instance.
	 * 
	 * @param key
	 *            The key of the attribute.
	 * @param value
	 *            Value of the attribute.
	 */
	public XAttributeTimestampImpl(String key, Date value) {
		this(key, value, null);
	}

	/**
	 * Creates a new instance.
	 * 
	 * @param key
	 *            The key of the attribute.
	 * @param value
	 *            Value of the attribute.
	 * @param extension
	 *            The extension of the attribute.
	 */
	public XAttributeTimestampImpl(String key, Date value, XExtension extension) {
		super(key, extension);
		setValue(value);
	}

	/**
	 * Creates a new instance.
	 * 
	 * @param key
	 *            The key of the attribute.
	 * @param millis
	 *            Value of the attribute, in milliseconds.
	 */
	public XAttributeTimestampImpl(String key, long millis) {
		this(key, millis, null);
	}

	/**
	 * Creates a new instance.
	 * 
	 * @param key
	 *            The key of the attribute.
	 * @param millis
	 *            Value of the attribute, in milliseconds.
	 * @param extension
	 *            The extension of the attribute.
	 */
	public XAttributeTimestampImpl(String key, long millis, XExtension extension) {
		this(key, new Date(millis), extension);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.deckfour.xes.model.XAttributeTimestamp#getValue()
	 */
	public Date getValue() {
		return this.value;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.deckfour.xes.model.XAttributeTimestamp#getValueMillis()
	 */
	public long getValueMillis() {
		return this.value.getTime();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.deckfour.xes.model.XAttributeTimestamp#setValue(java.util.Date)
	 */
	public void setValue(Date value) {
		if (value == null) {
			throw new NullPointerException(
					"No null value allowed in timestamp attribute!");
		}
		this.value = value;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.deckfour.xes.model.XAttributeTimestamp#setValueMillis(long)
	 */
	public void setValueMillis(long value) {
		this.value.setTime(value);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#toString()
	 */
	@Override
	public String toString() {
		synchronized (FORMATTER) {
			return FORMATTER.format(this.value);
		}
	}

	public Object clone() {
		XAttributeTimestampImpl clone = (XAttributeTimestampImpl) super.clone();
		clone.value = new Date(clone.value.getTime());
		return clone;
	}

	public boolean equals(Object obj) {
		if (obj instanceof XAttributeTimestamp) { // compares types
			XAttributeTimestamp other = (XAttributeTimestamp) obj;
			return super.equals(other) // compares keys
					&& value.equals(other.getValue()); // compares values
		} else {
			return false;
		}
	}

	@Override
	public int compareTo(XAttribute other) {
		if (!(other instanceof XAttributeTimestamp)) {
			throw new ClassCastException();
		}
		int result = super.compareTo(other);
		if (result != 0) {
			return result;
		}
		return value.compareTo(((XAttributeTimestamp)other).getValue());
	}
}