Source Code Cross Referenced for ExternalStructureTools.java in  » Testing » jacareto » jacareto » struct » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Testing » jacareto » jacareto.struct 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Jacareto Copyright (c) 2002-2005
003:         * Applied Computer Science Research Group, Darmstadt University of
004:         * Technology, Institute of Mathematics & Computer Science,
005:         * Ludwigsburg University of Education, and Computer Based
006:         * Learning Research Group, Aachen University. All rights reserved.
007:         *
008:         * Jacareto is free software; you can redistribute it and/or
009:         * modify it under the terms of the GNU General Public
010:         * License as published by the Free Software Foundation; either
011:         * version 2 of the License, or (at your option) any later version.
012:         *
013:         * Jacareto is distributed in the hope that it will be useful,
014:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
015:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
016:         * General Public License for more details.
017:         *
018:         * You should have received a copy of the GNU General Public
019:         * License along with Jacareto; if not, write to the Free
020:         * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
021:         *
022:         */
023:
024:        package jacareto.struct;
025:
026:        import jacareto.record.RandomAccessRecord;
027:        import jacareto.record.ReadAccessRecord;
028:        import jacareto.record.RecordException;
029:        import jacareto.record.Recordable;
030:        import jacareto.system.Environment;
031:
032:        /**
033:         * Some useful tools for external structures.
034:         *
035:         * @author <a href="mailto:markus.bois@web.de">Markus Bois</a>
036:         * @version 1.01
037:         */
038:        public class ExternalStructureTools extends Environment {
039:            /**
040:             * Write all elements the external structure into the session structure und the session record.
041:             * It rebuilds the tree model of the session.
042:             *
043:             * @param exStructure the source structure
044:             * @param record where the recordables should be stored
045:             * @param structure the structure that should be rebuild
046:             *
047:             * @throws StructureException if the target record is not open
048:             */
049:            public static void write(ExternalStructure exStructure,
050:                    RandomAccessRecord record, Structure structure)
051:                    throws StructureException {
052:                try {
053:                    ReadAccessRecord exRecord = exStructure.getRecord();
054:
055:                    StructureElement help = exStructure.getRootElement();
056:
057:                    if (help instanceof  RootElement) {
058:                        RootElement root = (RootElement) help;
059:                        root.setRecord(record);
060:
061:                        record.clear();
062:
063:                        structure.setRoot(root);
064:
065:                        try {
066:                            boolean notification = record
067:                                    .isNotificationEnabled();
068:                            record.setNotificationEnabled(false);
069:
070:                            Recordable[] elements = exRecord.toArray();
071:
072:                            for (int i = 0; i < elements.length; i++) {
073:                                record.insert(elements[i], i);
074:                            }
075:
076:                            record.setRecordName(exStructure.getRecordName());
077:
078:                            record.setNotificationEnabled(notification);
079:                        } catch (RecordException r) {
080:                            throw new StructureException(r.toString());
081:                        }
082:                    }
083:                } catch (RecordException r) {
084:                    throw new StructureException(r.toString());
085:                } catch (StructureException e) {
086:                    throw new StructureException(e.toString());
087:                }
088:            }
089:
090:            /**
091:             * Writes the session structure and record into the external structure.
092:             *
093:             * @param record the record that should be stored
094:             * @param structure the structure that should be stored
095:             * @param exStructure the target structure
096:             *
097:             * @throws StructureException if the target record is not open
098:             */
099:            public static void write(RandomAccessRecord record,
100:                    Structure structure, ExternalStructure exStructure)
101:                    throws StructureException {
102:                RootElement rootElement = structure.getRootElement();
103:
104:                try {
105:                    exStructure.setRecord(record);
106:                    exStructure.setRecordName(record.getRecordName());
107:                    exStructure.setRootElement(rootElement);
108:                } catch (StructureException s) {
109:                    throw new StructureException(s.toString());
110:                }
111:            }
112:        }
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