Examples of org.aspectj.apache.bcel.classfile.JavaClass

Package org.aspectj.apache.bcel.classfile

Examples of org.aspectj.apache.bcel.classfile.JavaClass

org.aspectj.apache.bcel.classfile.JavaClass
sun.com/docs/specs/">JVM specification for details. The intent of this class is to represent a parsed or otherwise existing class file. Those interested in programatically generating classes should see the ClassGen class. @version $Id: JavaClass.java,v 1.22 2009/09/15 19:40:14 aclement Exp $ @see org.aspectj.apache.bcel.generic.ClassGen @author M. Dahm

      // INVOKEVIRTUAL is a LoadClass; the Class where the referenced method is declared in,
      // is therefore resolved/verified.
      // INVOKEVIRTUAL is an InvokeInstruction, the argument and return types are resolved/verified,
      // too. So are the allowed method names.
      String classname = o.getClassName(cpg);
      JavaClass jc = Repository.lookupClass(classname);
      Method[] ms = jc.getMethods();
      Method m = null;
      for (int i=0; i<ms.length; i++){
        if ( (ms[i].getName().equals(o.getMethodName(cpg))) &&
             (Type.getReturnType(ms[i].getSignature()).equals(o.getReturnType(cpg))) &&
             (objarrayequals(Type.getArgumentTypes(ms[i].getSignature()), o.getArgumentTypes(cpg))) ){
          m = ms[i];
          break;
        }
      }
      if (m == null){
        constraintViolated(o, "Referenced method '"+o.getMethodName(cpg)+"' with expected signature not found in class '"+jc.getClassName()+"'. The native verfier does allow the method to be declared in some superclass or implemented interface, which the Java Virtual Machine Specification, Second Edition does not.");
      }
      if (! (jc.isClass())){
        constraintViolated(o, "Referenced class '"+jc.getClassName()+"' is an interface, but not a class as expected.");
      }
          
    }

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   * @return class object for given fully qualified class name, or null
   * if the class could not be found or parsed correctly
   */
  public static JavaClass lookupClass(String class_name) {
    try {
      JavaClass clazz = getRepository().findClass(class_name);


      if(clazz == null) {
  return getRepository().loadClass(class_name);
      } else {
  return clazz;

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   * Add clazz to repository if there isn't an equally named class already in there.
   *
   * @return old entry in repository
   */
  public static JavaClass addClass(JavaClass clazz) {
    JavaClass old = getRepository().findClass(clazz.getClassName());
    getRepository().storeClass(clazz);
    return old;
  }

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   * @return list of super classes of clazz in ascending order, i.e.,
   * Object is always the last element. return "null", if class
   * cannot be found.
   */
  public static JavaClass[] getSuperClasses(String class_name) {
    JavaClass jc = lookupClass(class_name);
    return (jc == null? null : getSuperClasses(jc));
  }

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  /**
   * If "this" doesn't reference a class, it references an interface
   * or a non-existant entity.
   */
  public boolean referencesClass(){
    JavaClass jc = Repository.lookupClass(class_name);
    if (jc == null)
      return false;
    else
      return jc.isClass();
  }

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  /**
   * If "this" doesn't reference an interface, it references a class
   * or a non-existant entity.
   */
  public boolean referencesInterface(){
    JavaClass jc = Repository.lookupClass(class_name);
    if (jc == null)
      return false;
    else
      return !jc.isClass();
  }

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  /**
   * Java Virtual Machine Specification edition 2, � 5.4.4 Access Control
   */
  public boolean accessibleTo(ObjectType accessor) {
    JavaClass jc = Repository.lookupClass(class_name);


    if(jc.isPublic()) {
      return true;
    } else {
      JavaClass acc = Repository.lookupClass(accessor.class_name);
      return acc.getPackageName().equals(jc.getPackageName());
    }
  }

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      constraintViolated(o, "Stack top should be an object reference that's not an array reference, but is '"+objectref+"'.");
    }
    
    String field_name = o.getFieldName(cpg);
    
    JavaClass jc = Repository.lookupClass(o.getClassType(cpg).getClassName());
    Field[] fields = jc.getFields();
    Field f = null;
    for (int i=0; i<fields.length; i++){
      if (fields[i].getName().equals(field_name)){
        f = fields[i];
        break;

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      constraintViolated(o, "Stack next-to-top should be an object reference that's not an array reference, but is '"+objectref+"'.");
    }
    
    String field_name = o.getFieldName(cpg);
    
    JavaClass jc = Repository.lookupClass(o.getClassType(cpg).getClassName());
    Field[] fields = jc.getFields();
    Field f = null;
    for (int i=0; i<fields.length; i++){
      if (fields[i].getName().equals(field_name)){
        f = fields[i];
        break;

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  /**
   * Ensures the specific preconditions of the said instruction.
   */
  public void visitPUTSTATIC(PUTSTATIC o){
    String field_name = o.getFieldName(cpg);
    JavaClass jc = Repository.lookupClass(o.getClassType(cpg).getClassName());
    Field[] fields = jc.getFields();
    Field f = null;
    for (int i=0; i<fields.length; i++){
      if (fields[i].getName().equals(field_name)){
        f = fields[i];
        break;

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