Java Code Examples for org.apache.bcel.classfile.Field#isPublic()

protected String field2str(final Field field) {
  String modifier = "";

  if (field.isPrivate()) {
    modifier = "private ";
  } else if (field.isProtected()) {
    modifier = "protected ";
  } else if (field.isPublic()) {
    modifier = "public ";
  }

  if (field.isStatic()) {
    modifier += "static ";
  }

  if (field.isFinal()) {
    modifier += "final ";
  }

  modifier += field.getType().toString();

  modifier += ' ' + field.getName();

  return modifier;
}
 

/**
 * Checks if the visited field is of type {@link java.util.Calendar} or
 * {@link java.text.DateFormat} or a subclass of either one. If so and the
 * field is static and non-private it is suspicious and will be reported.
 */
@Override
public void visit(Field aField) {
    if (aField.isPrivate()) {
        /*
         * private fields are harmless, as long as they are used correctly
         * inside their own class. This should be something the rest of this
         * detector can find out, so do not report them, they might be false
         * positives.
         */
        return;
    }
    String superclassName = getSuperclassName();
    if (!aField.isStatic() && !"java/lang/Enum".equals(superclassName)) {
        return;
    }
    if (!aField.isPublic() && !aField.isProtected()) {
        return;
    }
    ClassDescriptor classOfField = DescriptorFactory.createClassDescriptorFromFieldSignature(aField.getSignature());
    String tBugType = null;
    int priority = aField.isPublic() && aField.isFinal() && aField.getName().equals(aField.getName().toUpperCase())
            && getThisClass().isPublic() ? HIGH_PRIORITY : NORMAL_PRIORITY;
    if (classOfField != null) {
        try {
            if (subtypes2.isSubtype(classOfField, calendarType)) {
                tBugType = "STCAL_STATIC_CALENDAR_INSTANCE";
                priority++;
            } else if (subtypes2.isSubtype(classOfField, dateFormatType)) {
                tBugType = "STCAL_STATIC_SIMPLE_DATE_FORMAT_INSTANCE";
            }
            if (getClassContext().getXClass().usesConcurrency()) {
                priority--;
            }
            if (tBugType != null) {

                pendingBugs.put(getXField(), new BugInstance(this, tBugType, priority).addClass(currentClass).addField(this));
            }
        } catch (ClassNotFoundException e) {
            AnalysisContext.reportMissingClass(e);
        }
    }

}
 

@Override
public void visitField(final Field obj) {

    if (jc.isClass()) {
        int maxone=0;
        if (obj.isPrivate()) {
            maxone++;
        }
        if (obj.isProtected()) {
            maxone++;
        }
        if (obj.isPublic()) {
            maxone++;
        }
        if (maxone > 1) {
            throw new ClassConstraintException("Field '"+tostring(obj)+
                "' must only have at most one of its ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC modifiers set.");
        }

        if (obj.isFinal() && obj.isVolatile()) {
            throw new ClassConstraintException("Field '"+tostring(obj)+
                "' must only have at most one of its ACC_FINAL, ACC_VOLATILE modifiers set.");
        }
    }
    else{ // isInterface!
        if (!obj.isPublic()) {
            throw new ClassConstraintException("Interface field '"+tostring(obj)+
                "' must have the ACC_PUBLIC modifier set but hasn't!");
        }
        if (!obj.isStatic()) {
            throw new ClassConstraintException("Interface field '"+tostring(obj)+
                "' must have the ACC_STATIC modifier set but hasn't!");
        }
        if (!obj.isFinal()) {
            throw new ClassConstraintException("Interface field '"+tostring(obj)+
                "' must have the ACC_FINAL modifier set but hasn't!");
        }
    }

    if ((obj.getAccessFlags() & ~(Const.ACC_PUBLIC|Const.ACC_PRIVATE|Const.ACC_PROTECTED|Const.ACC_STATIC|
                                  Const.ACC_FINAL|Const.ACC_VOLATILE|Const.ACC_TRANSIENT)) > 0) {
        addMessage("Field '"+tostring(obj)+
            "' has access flag(s) other than ACC_PUBLIC, ACC_PRIVATE, ACC_PROTECTED,"+
                " ACC_STATIC, ACC_FINAL, ACC_VOLATILE, ACC_TRANSIENT set (ignored).");
    }

    checkIndex(obj, obj.getNameIndex(), CONST_Utf8);

    final String name = obj.getName();
    if (! validFieldName(name)) {
        throw new ClassConstraintException("Field '"+tostring(obj)+"' has illegal name '"+obj.getName()+"'.");
    }

    // A descriptor is often named signature in BCEL
    checkIndex(obj, obj.getSignatureIndex(), CONST_Utf8);

    final String sig  = ((ConstantUtf8) (cp.getConstant(obj.getSignatureIndex()))).getBytes(); // Field or Method sig.(=descriptor)

    try{
        Type.getType(sig);  /* Don't need the return value */
    }
    catch (final ClassFormatException cfe) {
        throw new ClassConstraintException("Illegal descriptor (==signature) '"+sig+"' used by '"+tostring(obj)+"'.", cfe);
    }

    final String nameanddesc = name+sig;
    if (field_names_and_desc.contains(nameanddesc)) {
        throw new ClassConstraintException("No two fields (like '"+tostring(obj)+
            "') are allowed have same names and descriptors!");
    }
    if (field_names.contains(name)) {
        addMessage("More than one field of name '"+name+
            "' detected (but with different type descriptors). This is very unusual.");
    }
    field_names_and_desc.add(nameanddesc);
    field_names.add(name);

    final Attribute[] atts = obj.getAttributes();
    for (final Attribute att : atts) {
        if ((!(att instanceof ConstantValue)) &&
                (!(att instanceof Synthetic)) &&
                (!(att instanceof Deprecated))) {
            addMessage("Attribute '" + tostring(att) + "' as an attribute of Field '" +
                tostring(obj) + "' is unknown and will therefore be ignored.");
        }
        if (!(att instanceof ConstantValue)) {
            addMessage("Attribute '" + tostring(att) + "' as an attribute of Field '" + tostring(obj) +
                "' is not a ConstantValue and is therefore only of use for debuggers and such.");
        }
    }
}