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1 package examples.binding;
2
3 import java.io.IOException  ;
4 import java.io.PrintWriter ;
5 import java.io.FileWriter ;
6 import java.io.StringWriter ;
7 import java.util.Iterator ;
8
9 public class BeanGen {
10
11 private String destdir;
12 public BeanGen() {}
13
14 public void setDestDir(String dir) {
15 destdir = dir;
16 }
17
18 public String getDestDir() {
19 return destdir;
20 }
21
22 private static String capital(String oldString) {
23 return (oldString.substring(0,1)).toUpperCase()+
24 oldString.substring(1,oldString.length());
25 }
26
27 public void generatePropertyDecl(Property p,
28 PrintWriter writer) {
29 writer.print(" private ");
30 if (p.getType() == Property.STRING)
31 writer.println("String _"+p.getName()+";");
32 if (p.getType() == Property.INTEGER)
33 writer.println("int _"+p.getName()+";");
34 if (p.getType() == Property.BEAN)
35 writer.println(p.getRefType()+" _"+p.getName()+";");
36 }
37 public void generateSetters(Property p,
38 PrintWriter writer) {
39 String name = capital(p.getName());
40 if (p.getType() == Property.STRING) {
41 writer.print(" public void set"+name+"(String val)");
42 writer.println("{ _"+p.getName()+"=val;}");
43 writer.print(" public String get"+name+"()");
44 writer.println("{ return _"+p.getName()+";}");
45 }
46 if (p.getType() == Property.INTEGER) {
47 writer.print(" public void set"+name+"(int val)");
48 writer.println("{ _"+p.getName()+"=val;}");
49 writer.print(" public int get"+name+"()");
50 writer.println("{ return _"+p.getName()+";}");
51 }
52 if (p.getType() == Property.BEAN) {
53 writer.print(" public void set"+name+"("+p.getRefType()+" val)");
54 writer.println("{ _"+p.getName()+"=val;}");
55 writer.print(" public "+p.getRefType()+" get"+name+"()");
56 writer.println("{ return _"+p.getName()+";}");
57 }
58 }
59
60 public void generateBean(String packageName,
61 BeanInfo info)
62 throws IOException
63 {
64
65 String className = capital(info.getName());
66 PrintWriter writer = new PrintWriter (new FileWriter (getDestDir()+"/"+className+".java"));
67 writer.println("//**-- "+className+".java--**");
68 writer.println("package "+packageName+";");
69 writer.println("public class "+className+" {");
70 writer.println(" public "+className+"(){}");
71 Property[] properties = info.getProperties();
72 for(int i=0; i < properties.length; i++) {
73 generatePropertyDecl(properties[i], writer);
74 }
75 properties = info.getProperties();
76 for(int i=0; i < properties.length; i++) {
77 generateSetters(properties[i], writer);
78 }
79 writer.println("}");
80 writer.close();
81 }
82
83 public void generate(BeanDescription desc)
84 throws IOException
85 {
86
87 Iterator i = desc.getBeans();
88 while(i.hasNext()) {
89 BeanInfo info = (BeanInfo) i.next();
90 generateBean(desc.getPackageName(),
91 info);
92 generateCodec(desc.getNamespaceName(),
93 desc.getPackageName(),
94 info);
95 }
96 }
97
98
99 public void generatePropertySerializer(String namespace,
100 String packageName,
101 Property p,
102 PrintWriter writer) {
103 String name = capital(p.getName());
104 if (p.getType() == Property.STRING) {
105 writer.println(" writer.writeStartElement(_namespace,"+
106 quote(name)+");");
107
108 writer.println(" writer.writeCharacters(obj.get"+name+"());");
109 writer.println(" writer.writeEndElement();");
110 }
111 if (p.getType() == Property.INTEGER) {
112 writer.println(" writer.writeStartElement(_namespace,"+
113 quote(name)+");");
114
115 writer.println(" writer.writeCharacters(Integer.toString(obj.get"+name+"()));");
116 writer.println(" writer.writeEndElement();");
117 }
118 if (p.getType() == Property.BEAN) {
119 writer.println(" "+packageName+"."+p.getRefType()+"Codec.serialize(obj.get"+name+"()"+
120 ",writer);");
121 }
122
123 }
124
125 public String quote(String val) {
126 return "\""+val+"\"";
127 }
128
129 public void generateSerializer(String namespace,
130 String packageName,
131 BeanInfo info,
132 PrintWriter writer)
133 {
134 String className = capital(info.getName());
135 writer.println(" public static void serialize("+className+
136 " obj, XMLStreamWriter writer)");
137 writer.println(" throws XMLStreamException");
138 writer.println(" {");
139 writer.println(" writer.setPrefix(\"a\",_namespace);");
140 writer.println(" writer.writeStartElement(_namespace,"+
141 quote(className)+");");
142 writer.println(" writer.writeNamespace(\"a\",_namespace);");
143 Property[] properties = info.getProperties();
144 for(int i=0; i < properties.length; i++) {
145 generatePropertySerializer(namespace,packageName,properties[i], writer);
146 }
147 writer.println(" writer.writeEndElement();");
148 writer.println(" }");
149 }
150
151 public void skipSpace(PrintWriter writer) {
152 writer.println(" while(reader.isWhiteSpace() || !(reader.isStartElement() || reader.isEndElement() || reader.isCharacters())) reader.next();");
153 }
154
155 public void next(PrintWriter writer) {
156 writer.println(" reader.next();");
157 }
158
159 public void generatePropertyDeserializer(String namespace,
160 String packageName,
161 Property p,
162 PrintWriter writer) {
163 String name = capital(p.getName());
164 if (p.getType() == Property.STRING) {
165 writer.println(" reader.require(XMLStreamReader.START_ELEMENT,"+
166 "_namespace,"+
167 quote(name)+");");
168 next(writer);
169
170 writer.println(" obj.set"+name+"("+
171 "reader.getText());");
172 next(writer);
173 writer.println(" reader.require(XMLStreamReader.END_ELEMENT,"+
174 "_namespace,"+
175 quote(name)+");");
176 next(writer);
177
178 }
179 if (p.getType() == Property.INTEGER) {
180 writer.println(" reader.require(XMLStreamReader.START_ELEMENT,"+
181 "_namespace,"+
182 quote(name)+");");
183 next(writer);
184
185 writer.println(" obj.set"+name+"("+
186 "(new Integer(reader.getText()).intValue()));");
187 next(writer);
188 writer.println(" reader.require(XMLStreamReader.END_ELEMENT,"+
189 "_namespace,"+
190 quote(name)+");");
191 next(writer);
192
193 }
194 if (p.getType() == Property.BEAN) {
195 writer.println(" obj.set"+name+"("+packageName+"."+p.getRefType()+"Codec.deserialize("
196 +"reader));");
197 }
198
199 }
200
201 public void generateDeserializer(String namespace,
202 String packageName,
203 BeanInfo info,
204 PrintWriter writer)
205 {
206 String className = capital(info.getName());
207 writer.println(" public static "+className+" deserialize("+
208 " XMLStreamReader reader)");
209 writer.println(" throws XMLStreamException");
210 writer.println(" {");
211 skipSpace(writer);
212 writer.println(" "+className+" obj = new "+packageName+
213 "."+className+"();");
214 writer.println(" reader.require(XMLStreamReader.START_ELEMENT,"+
215 "_namespace,"+
216 quote(className)+");");
217 next(writer);
218 Property[] properties = info.getProperties();
219 for(int i=0; i < properties.length; i++) {
220 generatePropertyDeserializer(namespace,packageName,properties[i], writer);
221 }
222 writer.println(" reader.require(XMLStreamReader.END_ELEMENT,"+
223 "_namespace,"+
224 quote(className)+");");
225 next(writer);
226 writer.println(" return obj;");
227 writer.println(" }");
228 }
229
230 public void generateCodec(String namespace,
231 String packageName,
232 BeanInfo info)
233 throws IOException
234 {
235
236 String className = capital(info.getName()+"Codec");
237 PrintWriter writer = new PrintWriter (new FileWriter (getDestDir()+"/"+className+".java"));
238 writer.println("//**-- "+className+".java--**");
239 writer.println("package "+packageName+";");
240 writer.println("import javax.xml.stream.XMLStreamWriter;");
241 writer.println("import javax.xml.stream.XMLStreamReader;");
242 writer.println("import javax.xml.stream.XMLStreamException;");
243 writer.println("public class "+className+" {");
244 writer.println(" private static final String _namespace=\""+namespace+"\";");
245 writer.println(" public "+className+"(){}");
246 generateSerializer(namespace,packageName,info,writer);
247 generateDeserializer(namespace,packageName,info,writer);
248 writer.println("}");
249 writer.close();
250 }
251
252 public static void main(String args[])
253 throws Exception
254 {
255 Parser parser = new Parser(new java.io.FileReader (args[0]));
256 BeanDescription description = parser.parse();
257
258 StringWriter w = new StringWriter ();
259 BeanGen generator = new BeanGen();
260 generator.setDestDir(args[1]);
261 generator.generate(description);
262 }
263 }
264
265
266
267 |
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Java API By Example, From Geeks To Geeks.