Source Code Cross Referenced for StringHelper.java in  » Project-Management » Activity-Manager » jfb » tools » activitymgr » core » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Project Management » Activity Manager » jfb.tools.activitymgr.core.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 2004-2006, Jean-François Brazeau. All rights reserved.
003:         * 
004:         * Redistribution and use in source and binary forms, with or without 
005:         * modification, are permitted provided that the following conditions are met:
006:         *
007:         *  1. Redistributions of source code must retain the above copyright notice,
008:         *     this list of conditions and the following disclaimer.
009:         * 
010:         *  2. Redistributions in binary form must reproduce the above copyright
011:         *     notice, this list of conditions and the following disclaimer in the
012:         *     documentation and/or other materials provided with the distribution.
013:         * 
014:         *  3. The name of the author may not be used to endorse or promote products
015:         *     derived from this software without specific prior written permission.
016:         *
017:         * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
018:         * IMPLIEDWARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
019:         * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
020:         * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
021:         * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
022:         * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
023:         * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
024:         * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
025:         * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
026:         * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
027:         */
028:        package jfb.tools.activitymgr.core.util;
029:
030:        import java.io.ByteArrayOutputStream;
031:        import java.io.IOException;
032:        import java.io.InputStream;
033:        import java.io.LineNumberReader;
034:        import java.io.StringReader;
035:        import java.math.BigDecimal;
036:        import java.text.SimpleDateFormat;
037:        import java.util.ArrayList;
038:        import java.util.Calendar;
039:
040:        import org.apache.log4j.Logger;
041:
042:        /**
043:         * Classe offrant des services de manipulation de chaines de caractères.
044:         */
045:        public class StringHelper {
046:
047:            /** Logger */
048:            private static Logger log = Logger.getLogger(StringHelper.class);
049:
050:            /** Tableau de caractères utilisé pour la transformation Hexadécimale */
051:            private static final char[] c = new char[] { '0', '1', '2', '3',
052:                    '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
053:
054:            /** Formatteur de date */
055:            private static SimpleDateFormat sdf = new SimpleDateFormat(
056:                    "yyyyMMdd");
057:
058:            /**
059:             * Convertit un octet en hexadécimal.
060:             * @param b l'octet à convertir.
061:             * @return la valeur hexadécimale.
062:             */
063:            public static String toHex(byte b) {
064:                char[] result = new char[2];
065:                result[0] = c[(b >> 4) & 0x0F];
066:                result[1] = c[b & 0x0F];
067:                return new String(result);
068:            }
069:
070:            /**
071:             * Convertit une chaine hexadécimal en octet.
072:             * @param hex la chaine à convertir.
073:             * @return la valeur binaire.
074:             */
075:            public static byte toByte(String hex) {
076:                return (byte) Integer.parseInt(hex, 16);
077:            }
078:
079:            /**
080:             * Convertit une date en chaine de caractère.
081:             * @param cal la date à convertir.
082:             * @return la date convertie.
083:             */
084:            public static String toYYYYMMDD(Calendar cal) {
085:                return sdf.format(cal.getTime());
086:            }
087:
088:            /**
089:             * Convertit une valeur en centièmes en valeur au format
090:             * de saisie.
091:             * @param hundredth la valeur en centièmes.
092:             * @return la valeur convertie au format de saisie.
093:             */
094:            public static String hundredthToEntry(long hundredth) {
095:                StringBuffer buf = new StringBuffer(String.valueOf(hundredth));
096:                switch (buf.length()) {
097:                case 0:
098:                    buf.insert(0, "000");
099:                    break;
100:                case 1:
101:                    buf.insert(0, "00");
102:                    break;
103:                case 2:
104:                    buf.insert(0, "0");
105:                    break;
106:                }
107:                // Insertion du point
108:                buf.insert(buf.length() - 2, '.');
109:                // Retour du résultat
110:                return buf.toString();
111:            }
112:
113:            /**
114:             * Convertit une saisie utilisateur en centièmes.
115:             * @param entry l'entrée de l'utilisateur.
116:             * @return la valeur convertie en centièmes.
117:             * @throws StringFormatException levé en cas de problème de format de la saisie.
118:             */
119:            public static long entryToHundredth(String entry)
120:                    throws StringFormatException {
121:                BigDecimal decimal = null;
122:                try {
123:                    decimal = new BigDecimal(entry);
124:                } catch (NumberFormatException e) {
125:                    log.debug("Wrong format", e);
126:                    throw new StringFormatException("Wrong format (XXXXXX.XX)");
127:                }
128:                decimal = decimal.movePointRight(2);
129:                if (decimal.scale() > 0)
130:                    throw new StringFormatException("Too many digits");
131:                return decimal.longValue();
132:            }
133:
134:            /**
135:             * Retourne le contenu d'un flux sous forme d'une chaîne de
136:             * caractères.
137:             * @param in le flux de lecture.
138:             * @return la chaîne de caractère.
139:             * @throws IOException levé en cas d'incident I/O.
140:             */
141:            public static String fromInputStream(InputStream in)
142:                    throws IOException {
143:                ByteArrayOutputStream out = new ByteArrayOutputStream();
144:                int n = -1;
145:                byte[] buf = new byte[1024];
146:                while ((n = in.read(buf)) > 0) {
147:                    out.write(buf, 0, n);
148:                }
149:                in.close();
150:                return new String(out.toByteArray());
151:            }
152:
153:            /**
154:             * Découpe un script pour en extraire les requêtes SQL.
155:             * @param script le script à découper.
156:             * @return les requêtes.
157:             */
158:            public static String[] getQueries(String script) {
159:                ArrayList queries = new ArrayList();
160:                LineNumberReader lnr = new LineNumberReader(new StringReader(
161:                        script.trim()));
162:                StringBuffer buf = new StringBuffer();
163:                boolean proceed = true;
164:                do {
165:                    String line = null;
166:                    // On ne lit dans le flux que si la ligne courante n'est pas
167:                    // encore totalement traitée
168:                    if (line == null) {
169:                        try {
170:                            line = lnr.readLine();
171:                        } catch (IOException e) {
172:                            log
173:                                    .debug(
174:                                            "Unexpected I/O error while reading memory stream!",
175:                                            e);
176:                            throw new Error(
177:                                    "Unexpected I/O error while reading memory stream!",
178:                                    null);
179:                        }
180:                        log.debug("Line read : '" + line + "'");
181:                    }
182:                    // Si le flux est vide, on sort de la boucle
183:                    if (line == null) {
184:                        proceed = false;
185:                    }
186:                    // Sinon on traite la ligne
187:                    else {
188:                        line = line.trim();
189:                        // Si la ligne est un commentaire on l'ignore
190:                        if (line.startsWith("--")) {
191:                            line = null;
192:                        } else {
193:                            // Sinon on regarde si la ligne possède
194:                            // un point virgule
195:                            int idx = line.indexOf(';');
196:                            // Si c'est le cas, on découpe la chaîne et on
197:                            // exécute la requête
198:                            if (idx >= 0) {
199:                                buf.append(line.subSequence(0, idx));
200:                                line = line.substring(idx);
201:                                String sql = buf.toString();
202:                                buf.setLength(0);
203:                                log.debug(" - sql='" + sql + "'");
204:                                if (!"".equals(sql))
205:                                    queries.add(sql);
206:                            }
207:                            // sinon on ajoute la ligne au buffer de requeête
208:                            else {
209:                                buf.append(line);
210:                                buf.append('\n');
211:                            }
212:                        }
213:                    }
214:
215:                } while (proceed);
216:                // Ajout de la dernière requête (éventuellement)
217:                if (buf.length() != 0)
218:                    queries.add(buf.toString());
219:                return (String[]) queries.toArray(new String[queries.size()]);
220:            }
221:
222:        }
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