Source Code Cross Referenced for PathHistoryImpl.java in  » Test-Coverage » GroboUtils » net » sourceforge » groboutils » mbtf » v1 » engine » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Test Coverage » GroboUtils » net.sourceforge.groboutils.mbtf.v1.engine 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *  @(#)PathHistoryImpl.java
003:         *
004:         * Copyright (C) 2002-2003 Matt Albrecht
005:         * groboclown@users.sourceforge.net
006:         * http://groboutils.sourceforge.net
007:         *
008:         *  Part of the GroboUtils package at:
009:         *  http://groboutils.sourceforge.net
010:         *
011:         *  Permission is hereby granted, free of charge, to any person obtaining a
012:         *  copy of this software and associated documentation files (the "Software"),
013:         *  to deal in the Software without restriction, including without limitation
014:         *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
015:         *  and/or sell copies of the Software, and to permit persons to whom the 
016:         *  Software is furnished to do so, subject to the following conditions:
017:         *
018:         *  The above copyright notice and this permission notice shall be included in 
019:         *  all copies or substantial portions of the Software. 
020:         *
021:         *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
022:         *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
023:         *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL 
024:         *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
025:         *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
026:         *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
027:         *  DEALINGS IN THE SOFTWARE.
028:         */
029:        package net.sourceforge.groboutils.mbtf.v1.engine;
030:
031:        import net.sourceforge.groboutils.mbtf.v1.IState;
032:        import net.sourceforge.groboutils.mbtf.v1.IValidate;
033:        import net.sourceforge.groboutils.mbtf.v1.ITransition;
034:        import net.sourceforge.groboutils.mbtf.v1.IPathHistory;
035:        import net.sourceforge.groboutils.mbtf.v1.IErrors;
036:
037:        import java.util.Vector;
038:
039:        import org.apache.log4j.Logger;
040:
041:        /**
042:         * Records the states and transition history during a path traversal.
043:         * The instance can be cloned for the cases of errors and warnings needing to
044:         * store the path history when they occured.  The instance should also support
045:         * a toString() method for easy debugging and logging.
046:         *
047:         * @author     Matt Albrecht <a href="mailto:groboclown@users.sourceforge.net">groboclown@users.sourceforge.net</a>
048:         * @version    $Date: 2003/02/10 22:52:26 $
049:         * @since      June 12, 2002
050:         */
051:        public class PathHistoryImpl implements  IPathHistory, Cloneable {
052:            private static final Logger LOG = Logger
053:                    .getLogger(PathHistoryImpl.class);
054:
055:            private static interface IHistoryPart {
056:                public String toString();
057:            }
058:
059:            private static class StateHistoryPart implements  IHistoryPart {
060:                private IState state;
061:
062:                public StateHistoryPart(IState s) {
063:                    this .state = s;
064:                }
065:
066:                public String toString() {
067:                    if (this .state == null) {
068:                        return "    finished terminal state.\n";
069:                    }
070:                    return "    entered state '" + this .state.getName() + "'\n";
071:                }
072:            }
073:
074:            private static class TransHistoryPart implements  IHistoryPart {
075:                private ITransition trans;
076:
077:                public TransHistoryPart(ITransition t) {
078:                    this .trans = t;
079:                }
080:
081:                public String toString() {
082:                    return "    followed transition '" + this .trans.getName()
083:                            + "'\n";
084:                }
085:            }
086:
087:            private static abstract class ValidHistoryPart implements 
088:                    IHistoryPart {
089:                protected String err;
090:
091:                public ValidHistoryPart(IValidate v, IErrors e) {
092:                    if (e != null && e.getErrors().length > 0) {
093:                        this .err = e.toString();
094:                    } else {
095:                        this .err = "No errors.";
096:                    }
097:                }
098:            }
099:
100:            private static class StateValidHistoryPart extends ValidHistoryPart {
101:                private IState state;
102:
103:                public StateValidHistoryPart(IValidate v, IState s, IErrors e) {
104:                    super (v, e);
105:                    this .state = s;
106:                }
107:
108:                public String toString() {
109:                    return "    validated state '" + this .state.getName()
110:                            + "': " + this .err + "\n";
111:                }
112:            }
113:
114:            private static class TransValidHistoryPart extends ValidHistoryPart {
115:                private ITransition trans;
116:
117:                public TransValidHistoryPart(IValidate v, ITransition t,
118:                        IErrors e) {
119:                    super (v, e);
120:                    this .trans = t;
121:                }
122:
123:                public String toString() {
124:                    return "    validated transition '" + this .trans.getName()
125:                            + "': " + this .err + "\n";
126:                }
127:            }
128:
129:            private int errorCount = 0;
130:            private Vector history = new Vector();
131:
132:            /**
133:             * When the current state changes, add the new state here.  This should
134:             * be called for the start state, and once at the end of every successful
135:             * transition.
136:             */
137:            public void addState(IState s) {
138:                LOG.debug("addState( " + s + " )");
139:                this .history.addElement(new StateHistoryPart(s));
140:                LOG.debug("  - History is now: " + toString());
141:            }
142:
143:            /**
144:             * When a transition is about to occur, it should be added here.
145:             */
146:            public void addTransition(ITransition t) {
147:                LOG.debug("addTransition( " + t + " )");
148:                this .history.addElement(new TransHistoryPart(t));
149:            }
150:
151:            /**
152:             * After a validation call, the error results should be added here.
153:             */
154:            public void addValidate(IValidate val, IState owningState,
155:                    IErrors errors) {
156:                LOG.debug("addValidate( " + val + ", " + owningState + ", "
157:                        + errors + " )");
158:                if (errors != null) {
159:                    this .errorCount += errors.getErrors().length;
160:                }
161:                this .history.addElement(new StateValidHistoryPart(val,
162:                        owningState, errors));
163:            }
164:
165:            /**
166:             * After a validation call, the error results should be added here.
167:             */
168:            public void addValidate(IValidate val,
169:                    ITransition owningTransition, IErrors errors) {
170:                LOG.debug("addValidate( " + val + ", " + owningTransition
171:                        + ", " + errors + " )");
172:                if (errors != null) {
173:                    this .errorCount += errors.getErrors().length;
174:                }
175:                this .history.addElement(new TransValidHistoryPart(val,
176:                        owningTransition, errors));
177:            }
178:
179:            /**
180:             * Returns the total number of errors (halts, failures, and errors)
181:             * registered during validation and transitions.
182:             */
183:            public int getErrorCount() {
184:                return this .errorCount;
185:            }
186:
187:            public String toString() {
188:                IHistoryPart hp[] = new IHistoryPart[this .history.size()];
189:                this .history.copyInto(hp);
190:                if (hp.length <= 0) {
191:                    return "[no history]";
192:                }
193:                StringBuffer sb = new StringBuffer("[Path History:\n");
194:                for (int i = 0; i < hp.length; ++i) {
195:                    sb.append(hp[i]);
196:                }
197:                sb.append("\n]");
198:                return sb.toString();
199:            }
200:
201:            protected Object clone() throws CloneNotSupportedException {
202:                PathHistoryImpl phi = (PathHistoryImpl) super .clone();
203:                phi.errorCount = this .errorCount;
204:                phi.history = (Vector) this .history.clone();
205:
206:                return phi;
207:            }
208:
209:            public IPathHistory copy() {
210:                try {
211:                    return (IPathHistory) clone();
212:                } catch (CloneNotSupportedException e) {
213:                    throw new IllegalStateException(e.toString());
214:                }
215:            }
216:        }
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