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42 package com.sun.enterprise.admin.util.jmx;
43 import java.util.List  ;
44 import java.util.Iterator ;
45 import java.util.regex.Matcher ;
46 import java.util.regex.Pattern ;
47 import java.io.File ;
48 import java.io.OutputStream ;
49 import java.io.InputStream ;
50 import java.io.BufferedInputStream ;
51 import java.io.FileInputStream ;
52 import com.sun.org.apache.commons.modeler.Registry;
53 import com.sun.org.apache.commons.modeler.ManagedBean;
54 import com.sun.org.apache.commons.modeler.FieldInfo;
55
56 import com.sun.enterprise.admin.util.jmx.AttributeListUtils;
57
62 public class ObjectNamesSourceGenerator {
63
64 private final File regFile;
65 private final OutputStream out;
66 private final Registry reg;
67 private String pkgName;
68 private String className;
69 private final static String PARAM = "param";
70 private final static char ONDELIMITER = ':';
71 private final static String ANY_GETTER = "getConfigBeanObjectName";
72 private final static String DEFAULT_PACKAGE_NAME = null;
73 private final static String DEFAULT_CLASS_NAME = "ConfigMBeanNames";
74 public ObjectNamesSourceGenerator(final File regFile, final OutputStream out) throws Exception {
75 if (regFile == null || !regFile.canRead() || out == null) {
76 throw new IllegalArgumentException ("Either the registry file is unreadable or stream could not be written to");
77 }
78 this.regFile = regFile;
79 this.out = out;
80 this.pkgName = DEFAULT_PACKAGE_NAME;
81 this.className = DEFAULT_CLASS_NAME;
82 this.reg = new Registry();
83 final InputStream stream = new BufferedInputStream (new FileInputStream (regFile));
85 reg.loadDescriptors("MbeansDescriptorsDOMSource", stream, null);
86 }
87 private void setClassName(final String c) {
88 this.className = c;
89 }
90 private void setPackageName(final String p) {
91 this.pkgName = p;
92 }
93
94 public String asString() throws Exception {
95 final String [] s = reg.findManagedBeans();
96 final StringBuffer sb = new StringBuffer ();
97 sb.append(getClassPreamble());
98 for (int i = 0 ; i < s.length ; i ++) {
99 sb.append(mb2s(s[i]));
100 }
101 sb.append('\n' + "}");
102 return ( sb.toString() );
103 }
104
105 public void write() throws Exception {
106 out.write(this.asString().getBytes());
107 }
108 private String getClassPreamble() {
109 final StringBuffer sb = new StringBuffer ();
110 sb.append(getPackageDeclaration());
111 sb.append(getImports());
112 sb.append(getClassJavadoc());
113 return ( sb.toString() );
114 }
115 private String getPackageDeclaration() {
116 final StringBuffer sb = new StringBuffer ();
117 sb.append("package TBD...").append('\n');
118 sb.append('\n');
119 return ( sb.toString() );
120 }
121 private String getClassJavadoc() {
122 final StringBuffer sb = new StringBuffer ("/** An Auto-generated MBean ObjectName Factory */");
123 sb.append('\n');
124 sb.append("public class ConfigMBeanNames {");
125 sb.append('\n');
126 return ( sb.toString() );
127 }
128 private String getImports() {
129 return ("import javax.management.ObjectName;" + '\n');
130 }
131 private String mb2s(final String name) {
132 final ManagedBean mb = reg.findManagedBean(name);
133 final StringBuffer sb = new StringBuffer ();
134 final String method = getMethodSignature(mb);
135 sb.append(method).append('\n');
136 sb.append(getMethodBody(mb)).append('\n');
137 return ( sb.toString() );
139 }
140 private String getMethodSignature(final ManagedBean mb) {
141 final StringBuffer sb = new StringBuffer ("public static final ObjectName ");
142 sb.append("get");
143 final String humped = AttributeListUtils.dash2CamelCase(mb.getName());
144 sb.append(getValidJavaMethodName(humped));
145 sb.append("ObjectName(");
146 final String onv = getObjectNameValue(mb);
147 sb.append(getParameterList(onv));
148 sb.append(" )");
149 return ( sb.toString() );
150 }
151 private String getMethodBody(final ManagedBean mb) {
152 final String onv = getObjectNameValue(mb);
153 final String params = getParameterList(onv);
154 final String nodm = onv.substring(onv.indexOf(ONDELIMITER) + 1);
155 final String ong = positionalReplace(nodm);
158 final String ret = getReturnStatement(ong);
159 final StringBuffer sb = new StringBuffer ("{").append('\n').append(ret).append('\n').append("}");
160 return ( sb.toString() );
161 }
162 private String positionalReplace(final String tk) {
163 final String rs = Tok2Params.replacePositionalTokens(tk);
164 return ( rs );
165 }
166 private String getReturnStatement(final String s) {
167 final StringBuffer sb = new StringBuffer ();
168 final String qs = "\"" + s + "\"";
169 sb.append("return ( ").append(ANY_GETTER).append("( ").append(qs).append(" )").append(" )");
170 return ( sb.toString() );
171 }
172 private String getObjectNameValue(final ManagedBean mb) {
173 final List fields = mb.getFields();
174 final Iterator iter = fields.iterator();
175 String val = null;
176 while (iter.hasNext()) {
177 final FieldInfo f = (FieldInfo)iter.next();
178 if ("ObjectName".equals(f.getName())) {
179 val = (String ) f.getValue();
180 }
181 }
182 return ( val );
183 }
184 private String getValidJavaMethodName(final String s) {
185
186 String n = s.replace('#', '_');
187 return ( n );
188 }
189 private String getParameterList(final String on) {
190 return ( Tok2Params.convert2ParamList(on) );
191 }
192 public static void main(final String [] args) {
193 try {
194 final File r = new File ("/export/home/kedar/ee/LATEST/admin-core/admin/dtds/admin-mbeans-descriptors.xml");
195 final OutputStream op = System.out;
196 final ObjectNamesSourceGenerator o = new ObjectNamesSourceGenerator(r, op);
197 final String s = o.asString();
198 op.write(s.getBytes());
199 System.out.println("Done");
200 System.out.println("The length of Java source file would be, Characters: " + s.length());
201 }
202 catch (final Throwable e) {
203 e.printStackTrace();
204 }
205 }
206
207 private static class Tok2Params {
208 private final static String REGEX1 = "a*\\{\\d\\}a*";
209 private static String convert2ParamList(final String s) {
210 final Pattern p = Pattern.compile(REGEX1);
211 final Matcher m = p.matcher(s);
212 int n = 0;
213 while (m.find()) {
214 n++;
215 }
216 return ( getStringParamList(n-1) ) ;
217 }
218 private static String getStringParamList(final int n) {
219 final StringBuffer sb = new StringBuffer ();
220 for (int i = 0 ; i < n ; i++) {
221 sb.append(" final String ").append(PARAM).append(i+1);
222 if (i != n-1) {
223 sb.append(',');
224 }
225 }
226 return ( sb.toString() );
227 }
228 private static String replacePositionalTokens(final String ts) {
229 final Pattern p = Pattern.compile(REGEX1);
230 final Matcher m = p.matcher(ts);
231 final StringBuffer sb = new StringBuffer ();
232 while(m.find()) {
233 final String gr = m.group(); final char ch = gr.charAt(1);
235 final String replacement = PARAM + ch;
236 m.appendReplacement(sb, replacement);
237 }
238 m.appendTail(sb);
239 return ( sb.toString() );
240 }
241 }
242 }
243 |
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