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1
23
24 package examples.invoice.applications;
25
26 import org.objectweb.jorm.api.PClassMapping;
27 import org.objectweb.jorm.api.PMapper;
28 import org.objectweb.jorm.api.PException;
29
30 import java.io.FileInputStream  ;
31 import java.io.InputStream ;
32 import java.util.Iterator ;
33 import java.util.Properties ;
34
35
38 public final class BasicShell {
39 private final static String PROMPT = "jormexsh";
40 private final static int MAXCMDSIZE = 20;
41 private static BasicShell singleton = new BasicShell();
42 private ShellExtent shellExtent;
43 protected InputStream in;
44 PMapper activeMapper = null;
45
46
48 static BasicShell getInstance() {
49 return singleton;
50 }
51
52 private BasicShell() {
53 }
54
55
57 public String promptString(String prompt, int maxsize) {
58 byte[] cmd = new byte[maxsize];
59 int nextbyte = 0, inbyte;
60 try {
61 System.out.print(prompt);
62 System.out.flush();
63 do {
64 inbyte = in.read();
65 if (nextbyte < maxsize)
66 cmd[nextbyte] = (byte) inbyte;
67 nextbyte++;
68 } while ((inbyte != '\r') && (inbyte != '\n'));
69 if (inbyte == '\r') {
70 in.read();
71 }
72 if (nextbyte <= maxsize) {
73 if (nextbyte != 1)
74 return new String (cmd, 0, nextbyte - 1);
75 else
76 return "";
77 } else
78 return null;
79 } catch (Exception e) {
80 return null;
81 }
82 }
83
84 public void shellLoop(String propfilename, ShellExtent se, InputStream in) throws Exception {
85 Properties prop = new Properties ();
86 prop.load(new FileInputStream (propfilename));
87 JormInit.getInstance().initLogSystem(prop);
88 JormInit.getInstance().initResourceAdapter(prop);
89 prop = null;
90 this.in = in;
91 shellExtent = se;
92 String cmd;
93 do {
94 cmd = readCmd();
95 System.out.println();
96 if (cmd.equals("q") || cmd.equals("quit"))
97 return;
98 if (!interpCmd(cmd))
99 errorMsg("unknown");
100 System.out.println();
101 } while (true);
102 }
103
104 public void errorMsg(String msg) {
105 System.out.println("\tCommand failed: " + msg + ".\n");
106 }
107
108 public void printStringBlankApp(String str, int size) {
109 System.out.print(str);
110 if (str.length() >= size)
111 return;
112 int bl = size - str.length();
113 while (bl > 0) {
114 System.out.print(" ");
115 bl--;
116 }
117 }
118
119
121 private String readCmd() {
122 String cmd;
123 do {
124 cmd = promptString(
125 PROMPT + ((activeMapper == null)
126 ? ""
127 : ":mapper=" + activeMapper.getMapperName()) + "> ",
128 MAXCMDSIZE);
129 if (cmd == null)
130 errorMsg("wrong format");
131 else if (cmd.length() > 0)
132 return cmd;
133 } while (true);
134 }
135
136 private boolean interpCmd(String cmd) throws Exception {
137 if (shellExtent.interpCmd(cmd))
138 return true;
139 if (cmd.equals("lm") || cmd.equals("listmapper"))
140 listMapper();
141 else if (cmd.equals("am") || cmd.equals("activatemapper"))
142 activateMapper();
143 else if (cmd.equals("map"))
144 mapPClass();
145 else if (cmd.equals("?") || cmd.equals("h") || cmd.equals("help"))
146 help();
147 else
148 return false;
149 return true;
150 }
151
152 private void help() {
153 System.out.println("\tAvailable commands:");
154 System.out.println("\t\t- help | h | ? : this command. It provides help information about available commands of this application.");
155 System.out.println("\t\t- listmapper | lm : lists all available mappers.");
156 System.out.println("\t\t- activatemapper | am : activates a mapper as the default one used by commands that require a mapper. It does it for the active mapper if any, or requests this mapper.");
157 System.out.println("\t\t- map : maps all the persistent classes involved in this application.");
158 shellExtent.help();
159 }
160
161
164 private void listMapper() throws Exception {
165 Iterator it = JormInit.getInstance().registeredMapper();
166 PMapper mapper;
167 if (!it.hasNext()) {
168 System.out.println("\n\tNo mapper registered yet.\n");
169 return;
170 }
171 System.out.println("\n\tMAPPER NAME | URL");
172 System.out.println("\t--------------------------------------------------");
173 while (it.hasNext()) {
174 mapper = (PMapper) it.next();
175 System.out.print("\t");
176 printStringBlankApp(mapper.getMapperName(), 16);
177 System.out.print(" | ");
178 printStringBlankApp(JormInit.getInstance().getURL(mapper), 10);
179 System.out.println();
180 }
181 }
182
183 private void mapPClass() throws PException {
184 String name;
185 PMapper m;
186 if (activeMapper != null) {
187 m = activeMapper;
188 } else {
189 name = promptString("\tMapper name: ", 16);
190 if (name == null) {
191 errorMsg("wrong input name for mapper");
192 return;
193 }
194 m = JormInit.getInstance().getMapper(name);
195 if (m == null) {
196 errorMsg("no associated mapper");
197 return;
198 }
199 }
200 String rem = promptString("\tInit OP (REMS, REMD, CREATE, NONE): ", 6);
201 byte cleanup_action;
202 if ((rem == null) || (rem.length() == 0))
203 cleanup_action = PClassMapping.CREATE_STRUCTURE_IF_NEEDED;
204 else if (rem.equals("REMS"))
205 cleanup_action = PClassMapping.CLEANUP_REMOVEALL;
206 else if (rem.equals("REMD"))
207 cleanup_action = PClassMapping.CLEANUP_REMOVEDATA;
208 else if (rem.equals("NONE"))
209 cleanup_action = PClassMapping.CLEANUP_DONOTHING;
210 else
211 cleanup_action = PClassMapping.CREATE_STRUCTURE_IF_NEEDED;
212 try {
213 shellExtent.getHelper().map(m,
214 JormInit.getInstance().getLoggerFactory(),
215 cleanup_action);
216 System.out.println("Persistent classes mapped.");
217 } catch (Exception e) {
218 System.out.println("\n\tEXCEPTION");
219 e.printStackTrace();
220 System.out.println();
221 }
222 }
223
224 private void activateMapper() throws PException {
225 String name = promptString("\tMapper name: ", 16);
226 if (name == null) {
227 errorMsg("wrong input names for mapper");
228 return;
229 }
230 activeMapper = JormInit.getInstance().getMapper(name);
231 if (activeMapper == null) {
232 errorMsg("no associated mapper");
233 return;
234 }
235 System.out.println("Mapper <" + name + "> activated.");
236 }
237 }
238 |
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