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Show all versions of SEWOL Show documentation
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.util;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* Template implementation for a generic registry.
*
* @author Christian W. Guenther ([email protected])
*/
public abstract class XRegistry {
/**
* Registry set, holding all instances.
*/
private Set registry;
/**
* Holds the current default instance.
*/
private T current;
/**
* Instantiates a new registry.
*/
public XRegistry() {
registry = new HashSet();
current = null;
}
/**
* Retrieves a set of all available instances.
*/
public Set getAvailable() {
return Collections.unmodifiableSet(registry);
}
/**
* Retrieves the current default instance.
*/
public T currentDefault() {
return current;
}
/**
* Registers a new instance with this registry.
*
* @param instance Instance to be registered.
*/
public void register(T instance) {
if(!isContained(instance)) {
registry.add(instance);
if(current == null) {
current = instance;
}
}
}
/**
* Sets the current default instance of
* this registry.
*
* @param instance Instance to be the
* current default of this registry.
*/
public void setCurrentDefault(T instance) {
registry.add(instance);
current = instance;
}
/**
* Subclasses must implement this method. It is used
* by the registry to ensure that no duplicates are
* inserted.
*
* @param a An instance a.
* @param b Another instance b.
* @return Whether the instances a and b are equivalent.
*/
protected abstract boolean areEqual(T a, T b);
/**
* Checks whether the given instance is already
* contained in the registry.
*
* @param instance Instance to check against registry.
* @return Whether the given instance is already registered.
*/
protected boolean isContained(T instance) {
for(T ref : registry) {
if(areEqual(instance, ref)) {
return true;
}
}
return false;
}
}