Source Code Cross Referenced for ThreadInfo.java in  » Workflow-Engines » wfmopen-2.1.1 » de » danet » an » workflow » internalapi » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Workflow Engines » wfmopen 2.1.1 » de.danet.an.workflow.internalapi 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file is part of the WfMOpen project.
003:         * Copyright (C) 2001-2003 Danet GmbH (www.danet.de), GS-AN.
004:         * All rights reserved.
005:         *
006:         * This program is free software; you can redistribute it and/or modify
007:         * it under the terms of the GNU General Public License as published by
008:         * the Free Software Foundation; either version 2 of the License, or
009:         * (at your option) any later version.
010:         *
011:         * This program is distributed in the hope that it will be useful,
012:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014:         * GNU General Public License for more details.
015:         *
016:         * You should have received a copy of the GNU General Public License
017:         * along with this program; if not, write to the Free Software
018:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
019:         *
020:         * $Id: ThreadInfo.java,v 1.2 2007/05/25 11:04:35 drmlipp Exp $
021:         *
022:         * $Log: ThreadInfo.java,v $
023:         * Revision 1.2  2007/05/25 11:04:35  drmlipp
024:         * Old threadInfo resurrected for backward compatibility.
025:         *
026:         * Revision 1.1  2007/05/03 21:58:20  mlipp
027:         * Internal refactoring for making better use of local EJBs.
028:         *
029:         */
030:        package de.danet.an.workflow.internalapi;
031:
032:        import java.io.Serializable;
033:
034:        import java.util.Collection;
035:        import java.util.HashMap;
036:        import java.util.HashSet;
037:        import java.util.Iterator;
038:        import java.util.Map;
039:        import java.util.Set;
040:
041:        /**
042:         * This class provides information about the predecessors of an
043:         * activity, i.e. about the execution thread.
044:         *
045:         * @author <a href="mailto:lipp@danet.de"></a>
046:         * @version $Revision: 1.2 $
047:         */
048:
049:        public class ThreadInfo implements  Serializable {
050:
051:            /** Serial version UID. */
052:            private static final long serialVersionUID = 8225837740462510970L;
053:
054:            private static final org.apache.commons.logging.Log logger = org.apache.commons.logging.LogFactory
055:                    .getLog(ThreadInfo.class);
056:
057:            private Map preMap;
058:            private Set preSet;
059:
060:            /**
061:             * Creates an instance of <code>ThreadInfo</code> that includes
062:             * the given predecessor activities.
063:             * @param predecessors the collection of {@link
064:             * de.danet.an.workflow.localapi.ActivityLocal <code>Activities</code>} that
065:             * are to be registered as predecessors (my be <code>null</code>).
066:             */
067:            public ThreadInfo(Collection predecessors) {
068:                preMap = new HashMap();
069:                preSet = new HashSet();
070:                if (predecessors == null) {
071:                    return;
072:                }
073:                for (Iterator i = predecessors.iterator(); i.hasNext();) {
074:                    ExtActivityLocal preAct = (ExtActivityLocal) i.next();
075:                    String preKey = preAct.key();
076:                    preSet.add(preKey);
077:                    if (!preMap.containsKey(preKey)) {
078:                        preMap.put(preKey, new HashSet());
079:                    }
080:                    ((Set) preMap.get(preKey)).add(preKey);
081:                    for (Iterator j = preAct.threadInfo().allPredecessors()
082:                            .iterator(); j.hasNext();) {
083:                        String transKey = (String) j.next();
084:                        if (!preMap.containsKey(transKey)) {
085:                            preMap.put(transKey, new HashSet());
086:                        }
087:                        ((Set) preMap.get(transKey)).add(preKey);
088:                    }
089:                }
090:            }
091:
092:            /**
093:             * This constructor is solemnly used by 
094:             * {@link de.danet.an.workflow.apix.ThreadInfo <code>apix.ThreadInfo</code>}
095:             * to provide backward compatibility. 
096:             *
097:             * @param preMap
098:             * @param preSet
099:             */
100:            public ThreadInfo(Map preMap, Set preSet) {
101:                this .preMap = preMap;
102:                this .preSet = preSet;
103:            }
104:
105:            /**
106:             * Returns the keys of all predecessor activities.
107:             * @return the keys.
108:             */
109:            public Set allPredecessors() {
110:                return preMap.keySet();
111:            }
112:
113:            /**
114:             * Returns the keys of all immediate predecessor activities.
115:             * @return the keys.
116:             */
117:            public Set predecessors() {
118:                return preSet;
119:            }
120:
121:            /**
122:             * Returns the keys of all immediate predecessors that are
123:             * successors of the given activity.
124:             * @param origin the activity we are heading back to.
125:             * @return the keys.
126:             */
127:            public Set predecessorsFor(String origin) {
128:                return (Set) preMap.get(origin);
129:            }
130:
131:            /**
132:             * Verifies if the given key is among the predecessors.
133:             * @param key the activity to be looked for.
134:             * @return <code>true</code> if the given key is among the
135:             * predecessors.
136:             */
137:            public boolean includes(String key) {
138:                return preMap.keySet().contains(key);
139:            }
140:
141:            /**
142:             * Return string representation for debugging purposes.
143:             * @return a string representation.
144:             */
145:            public String toString() {
146:                String s = "ThreadInfo[";
147:                boolean first = true;
148:                for (Iterator i = preMap.keySet().iterator(); i.hasNext();) {
149:                    String pre = (String) i.next();
150:                    if (!first) {
151:                        s += ",";
152:                    }
153:                    first = false;
154:                    s += (pre + "->(");
155:                    boolean first2 = true;
156:                    for (Iterator j = ((Set) preMap.get(pre)).iterator(); j
157:                            .hasNext();) {
158:                        String p = (String) j.next();
159:                        if (!first2) {
160:                            s += ",";
161:                        }
162:                        first2 = false;
163:                        s += p;
164:                    }
165:                    s += ")";
166:                }
167:                s += "]";
168:                return s;
169:            }
170:
171:        }
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