Examples of javax.tools.diagnostics.runtime.java.JavaClassLoader

Package javax.tools.diagnostics.runtime.java

Examples of javax.tools.diagnostics.runtime.java.JavaClassLoader

javax.tools.diagnostics.runtime.java.JavaClassLoader
Represents an internal ClassLoader structure within a Java Virtual Machine instance. For most ClassLoaders there is a corresponding {@link java.lang.ClassLoader}instance within with JavaRuntime. For primordial class loaders such as the bootstrap class loader, there may or may not be a corresponding {@link java.lang.ClassLoader} instance.

Since Java does not define any strict inheritance structure between class loaders, there are no APIs for inspecting 'child' or 'parent' class loaders. This information may be inferred by inspecting the corresponding {@link java.lang.ClassLoader} instance:
pseudo javacode example
```
 JavaClassLoader  loader; JavaObject instance=loader.getObject(); String classLoaderName=instance.getJavaClass().getName(); 
```
@see java.lang.ClassLoader

  }


  /** Tests whether all the system classes are correctly reported as roots */
  // need to ignore primitive types
  private boolean checkSystemClasses(Map rootsCheckList) {
    JavaClassLoader systemClassLoader = getBootClassLoader();
    Iterator systemClasses = systemClassLoader.getDefinedClasses().iterator();
    boolean passed = true;
    String systemClassName = null;
    while (systemClasses.hasNext()) {
      Object next = systemClasses.next();
      if (next instanceof CorruptData) {

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        {
          JavaRuntime javaRT = (JavaRuntime) runTimesIt.next( );
          Iterator classLoaders = javaRT.getJavaClassLoaders().iterator();
          while (classLoaders.hasNext()){


            JavaClassLoader javaCL = (JavaClassLoader)classLoaders.next();
            Iterator javaClasses = javaCL.getDefinedClasses().iterator();


            while (javaClasses.hasNext()){
              JavaClass javaClass = (JavaClass)javaClasses.next();


              classes.put(javaClass.getID().getAddress(), javaClass);

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      {
        JavaRuntime jr = (JavaRuntime)itJavaRuntime.next();
        Iterator itJavaClassLoader = jr.getJavaClassLoaders().iterator();
        while (itJavaClassLoader.hasNext())
        {
          JavaClassLoader jcl = (JavaClassLoader)itJavaClassLoader.next();
          Iterator itJavaClass = jcl.getDefinedClasses().iterator();
          
          while (itJavaClass.hasNext())
          {
            JavaClass jc = (JavaClass)itJavaClass.next();
            Iterator itJavaMethod = jc.getDeclaredMethods().iterator();

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        _numberOfErrors++;
        reportError("CorruptData found in classloader list at address: " + ((CorruptData)potential).getAddress(), null);
        continue ITERATING_LOADERS;
      }
      
      JavaClassLoader thisClassLoader = (JavaClassLoader)potential;
      
      Iterator classesIt = thisClassLoader.getDefinedClasses().iterator();
      
ITERATING_CLASSES:while(classesIt.hasNext()) {
        potential = classesIt.next();
        
        numberOfClasses++;
        
        try {
          
          if(potential instanceof CorruptData) {
            _numberOfErrors++;
            reportError("CorruptData found in class list for classloader "
                + Long.toHexString(thisClassLoader.getObject().getID().getAddress()) 
                + " at address: " + ((CorruptData)potential).getAddress(), null);
            continue ITERATING_CLASSES;
          }


          JavaClass thisJavaClass = (JavaClass)potential;

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      addStaticReferences(thisJavaClass, references);
      
      addProtectionDomainReference(thisJavaClass,references);
      
      //Classloader
      JavaClassLoader loader = thisJavaClass.getClassLoader();
      
      if(loader != null) {
        JavaObject loaderObject = loader.getObject();
        if(loaderObject != null) {
          references.add(new Long(loaderObject.getID().getAddress()));
        } else {
          reportError("Null loader object returned for class: " + thisJavaClass.getName() + "(" + thisJavaClass.getID() + ")",null);
          _numberOfErrors++;

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    for (Object nextLoader : classLoaders) {      
      if (nextLoader instanceof CorruptData) {
        continue;
      }


      JavaClassLoader loader = (JavaClassLoader) nextLoader;


      List classes = loader.getDefinedClasses();


      for (Object nextClazz : classes) {


        if (nextClazz instanceof CorruptData) {
          continue;

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    for (Object nextLoader : classLoaders) {      
      if (nextLoader instanceof CorruptData) {
        continue;
      }
      
      JavaClassLoader loader = (JavaClassLoader) nextLoader;
      
      List classes = loader.getDefinedClasses();
      
      for (Object nextClazz : classes) {
        
        if (nextClazz instanceof CorruptData) {
          continue;

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    boolean found = false;
    JavaClass jc = null;
    
    while (itJavaClassLoader.hasNext() && !found)
    {
      JavaClassLoader jcl = (JavaClassLoader)itJavaClassLoader.next();
      Iterator itJavaClass = jcl.getDefinedClasses().iterator();
      while (itJavaClass.hasNext() && !found)
      {
        jc = (JavaClass)itJavaClass.next();
        String currClassName;

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    sb.append("instance size = " + datum.getSize());
*/
    
    String classLoaderInfo;
    try{
      JavaClassLoader jClassLoader = jc.getClassLoader();
      classLoaderInfo = "0x" + Long.toHexString(jClassLoader.getObject().getJavaClass().getID().getAddress());
    }catch (CorruptDataException cde){
      classLoaderInfo = cdeInfo;
    }
    out.print(spaces);
    out.print("\n\t");

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    Map javaClasses = new HashMap();
    Iterator itClassLoader = jr.getJavaClassLoaders().iterator();
    
    // create Map of all classes in this JavaRuntime's class loaders
    while (itClassLoader.hasNext()) {
      JavaClassLoader jcl = (JavaClassLoader)itClassLoader.next();
      
      // Check for any corrupt data for this classloader
      Iterator itCache = jcl.getCachedClasses().iterator();
      while (itCache.hasNext()) {
        Object next = itCache.next();
        if (next instanceof CorruptData){
          // Warn the user that the classloader data is corrupt
          try {
            long jclAddress = jcl.getObject().getID().getAddress();
            out.print("\t classloader ID: " + Utils.toHex(jclAddress) + " " + Exceptions.getCorruptDataExceptionString() + "\n");
          } catch (CorruptDataException e) {
            out.print("\t classloader ID: <unknown> " + Exceptions.getCorruptDataExceptionString() + "\n");
          }
          break;
        }
      }
      
      Iterator itClass = jcl.getDefinedClasses().iterator();
      while (itClass.hasNext()) {
        javaClasses.put((JavaClass)itClass.next(), new Datum());
      }
    }

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