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/*
* Copyright 2004-2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
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/* ObjectNameGenerator.java
* Indentation Information:
* 0. Please (try to) preserve these settings.
* 1. Spaces are preferred over tabs.
* 2. In vi/vim -
* :set tabstop=4 :set shiftwidth=4 :set softtabstop=4
* :set list and make sure you do not introduce any ^Is.
* 3. In S1 Studio -
* 1. Tools->Options->Editor Settings->Java Editor->Tab Size = 4
* 2. Tools->Options->Indentation Engines->Java Indentation Engine->Expand Tabs to Spaces = True.
* 3. Tools->Options->Indentation Engines->Java Indentation Engine->Number of Spaces per Tab = 4.
*/
package com.sun.enterprise.admin.util.jmx;
import java.util.List;
import java.util.Iterator;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.io.File;
import java.io.OutputStream;
import java.io.InputStream;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import com.sun.org.apache.commons.modeler.Registry;
import com.sun.org.apache.commons.modeler.ManagedBean;
import com.sun.org.apache.commons.modeler.FieldInfo;
import com.sun.enterprise.admin.util.jmx.AttributeListUtils;
/**
* @author Kedar Mhaswade
* @since Appserver 8.1
* @version $Revision: 1.4 $
*/
public class ObjectNamesSourceGenerator {
private final File regFile;
private final OutputStream out;
private final Registry reg;
private String pkgName;
private String className;
private final static String PARAM = "param";
private final static char ONDELIMITER = ':';
private final static String ANY_GETTER = "getConfigBeanObjectName";
private final static String DEFAULT_PACKAGE_NAME = null;
private final static String DEFAULT_CLASS_NAME = "ConfigMBeanNames";
public ObjectNamesSourceGenerator(final File regFile, final OutputStream out) throws Exception {
if (regFile == null || !regFile.canRead() || out == null) {
throw new IllegalArgumentException("Either the registry file is unreadable or stream could not be written to");
}
this.regFile = regFile;
this.out = out;
this.pkgName = DEFAULT_PACKAGE_NAME;
this.className = DEFAULT_CLASS_NAME;
this.reg = new Registry();
//reg.loadRegistry(new BufferedInputStream(new FileInputStream(regFile)));
final InputStream stream = new BufferedInputStream(new FileInputStream(regFile));
reg.loadDescriptors("MbeansDescriptorsDOMSource", stream, null);
}
private void setClassName(final String c) {
this.className = c;
}
private void setPackageName(final String p) {
this.pkgName = p;
}
public String asString() throws Exception {
final String[] s = reg.findManagedBeans();
final StringBuffer sb = new StringBuffer();
sb.append(getClassPreamble());
for (int i = 0 ; i < s.length ; i ++) {
sb.append(mb2s(s[i]));
}
sb.append('\n' + "}");
return ( sb.toString() );
}
public void write() throws Exception {
out.write(this.asString().getBytes());
}
private String getClassPreamble() {
final StringBuffer sb = new StringBuffer();
sb.append(getPackageDeclaration());
sb.append(getImports());
sb.append(getClassJavadoc());
return ( sb.toString() );
}
private String getPackageDeclaration() {
final StringBuffer sb = new StringBuffer();
sb.append("package TBD...").append('\n');
sb.append('\n');
return ( sb.toString() );
}
private String getClassJavadoc() {
final StringBuffer sb = new StringBuffer("/** An Auto-generated MBean ObjectName Factory */");
sb.append('\n');
sb.append("public class ConfigMBeanNames {");
sb.append('\n');
return ( sb.toString() );
}
private String getImports() {
return ("import javax.management.ObjectName;" + '\n');
}
private String mb2s(final String name) {
final ManagedBean mb = reg.findManagedBean(name);
final StringBuffer sb = new StringBuffer();
final String method = getMethodSignature(mb);
sb.append(method).append('\n');
sb.append(getMethodBody(mb)).append('\n');
//System.out.println(sb.toString());
return ( sb.toString() );
}
private String getMethodSignature(final ManagedBean mb) {
final StringBuffer sb = new StringBuffer("public static final ObjectName ");
sb.append("get");
final String humped = AttributeListUtils.dash2CamelCase(mb.getName());
sb.append(getValidJavaMethodName(humped));
sb.append("ObjectName(");
final String onv = getObjectNameValue(mb);
sb.append(getParameterList(onv));
sb.append(" )");
return ( sb.toString() );
}
private String getMethodBody(final ManagedBean mb) {
final String onv = getObjectNameValue(mb);
final String params = getParameterList(onv);
final String nodm = onv.substring(onv.indexOf(ONDELIMITER) + 1);
//System.out.println(nodm);
//System.out.println(params);
final String ong = positionalReplace(nodm);
final String ret = getReturnStatement(ong);
final StringBuffer sb = new StringBuffer("{").append('\n').append(ret).append('\n').append("}");
return ( sb.toString() );
}
private String positionalReplace(final String tk) {
final String rs = Tok2Params.replacePositionalTokens(tk);
return ( rs );
}
private String getReturnStatement(final String s) {
final StringBuffer sb = new StringBuffer();
final String qs = "\"" + s + "\"";
sb.append("return ( ").append(ANY_GETTER).append("( ").append(qs).append(" )").append(" )");
return ( sb.toString() );
}
private String getObjectNameValue(final ManagedBean mb) {
final List fields = mb.getFields();
final Iterator iter = fields.iterator();
String val = null;
while (iter.hasNext()) {
final FieldInfo f = (FieldInfo)iter.next();
if ("ObjectName".equals(f.getName())) {
val = (String) f.getValue();
}
}
return ( val );
}
private String getValidJavaMethodName(final String s) {
/* Currently '#' is the only culprit */
String n = s.replace('#', '_');
return ( n );
}
private String getParameterList(final String on) {
return ( Tok2Params.convert2ParamList(on) );
}
public static void main(final String[] args) {
try {
final File r = new File("/export/home/kedar/ee/LATEST/admin-core/admin/dtds/admin-mbeans-descriptors.xml");
final OutputStream op = System.out;
final ObjectNamesSourceGenerator o = new ObjectNamesSourceGenerator(r, op);
final String s = o.asString();
op.write(s.getBytes());
System.out.println("Done");
System.out.println("The length of Java source file would be, Characters: " + s.length());
}
catch (final Throwable e) {
e.printStackTrace();
}
}
private static class Tok2Params {
private final static String REGEX1 = "a*\\{\\d\\}a*";
private static String convert2ParamList(final String s) {
final Pattern p = Pattern.compile(REGEX1);
final Matcher m = p.matcher(s);
int n = 0;
while (m.find()) {
n++;
}
return ( getStringParamList(n-1) ) ;
}
private static String getStringParamList(final int n) {
final StringBuffer sb = new StringBuffer();
for (int i = 0 ; i < n ; i++) {
sb.append(" final String ").append(PARAM).append(i+1);
if (i != n-1) {
sb.append(',');
}
}
return ( sb.toString() );
}
private static String replacePositionalTokens(final String ts) {
final Pattern p = Pattern.compile(REGEX1);
final Matcher m = p.matcher(ts);
final StringBuffer sb = new StringBuffer();
while(m.find()) {
final String gr = m.group(); // this has to be of the form {d}
final char ch = gr.charAt(1);
final String replacement = PARAM + ch;
m.appendReplacement(sb, replacement);
}
m.appendTail(sb);
return ( sb.toString() );
}
}
}
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