private void put(ClassFormatOutput out) throws IOException {
/* Write out the header */
out.putU4(VMDescriptor.JAVA_CLASS_FORMAT_MAGIC);
out.putU2(minor_version);
out.putU2(major_version);
// special case checking that the number of constant
// pool entries does not exceed the limit of 65535
// (as it is stored as a U2).
// Special case to allow somewhat easier debugging
// of the resulting failure.
out.putU2("constant_pool", cptEntries.size());
cptPut(out);
out.putU2(access_flags);
out.putU2(this_class);
out.putU2(super_class);
if (interfaces != null) {
int ilen = interfaces.length;
out.putU2(ilen);
for (int i = 0; i < ilen; i++) {
out.putU2(interfaces[i]);
}
} else {
out.putU2(0);
}
if (field_info != null) {
out.putU2(field_info.size());
field_info.put(out);
} else {
out.putU2(0);
}
if (method_info != null) {
out.putU2(method_info.size());
method_info.put(out);
} else {
out.putU2(0);
}
if (attribute_info != null) {
out.putU2(attribute_info.size());
attribute_info.put(out);
} else {
out.putU2(0);
}
}
// remove all atttributes that are not essential
public void removeAttributes() throws IOException {
// Class level attributes
if (attribute_info != null) {
for (int i = attribute_info.size() - 1; i >= 0; i--) {
AttributeEntry ae = (AttributeEntry) attribute_info.elementAt(i);
String name = nameIndexToString(ae.getNameIndex());
if (name.equals("SourceFile")) attribute_info.removeElementAt(i);
else if (name.equals("InnerClasses")) ; // leave in
else System.err.println("WARNING - Unknown Class File attribute " + name);
}
if (attribute_info.size() == 0) attribute_info = null;
}
attribute_info = null;
// fields
for (Enumeration e = getFields(); e.hasMoreElements(); ) {
ClassMember member = (ClassMember) e.nextElement();
Attributes attrs = member.attribute_info;
if (attrs != null) {
for (int i = attrs.size() - 1; i >= 0; i--) {
AttributeEntry ae = (AttributeEntry) attrs.elementAt(i);
String name = nameIndexToString(ae.getNameIndex());
if (name.equals("ConstantValue")) ; // leave in
else if (name.equals("Synthetic")) ; // leave in
else System.err.println("WARNING - Unknown Field attribute " + name);
}
if (attrs.size() == 0) member.attribute_info = null;
}
}
// methods
for (Enumeration e = getMethods(); e.hasMoreElements(); ) {
ClassMember member = (ClassMember) e.nextElement();
Attributes attrs = member.attribute_info;
if (attrs != null) {
for (int i = attrs.size() - 1; i >= 0; i--) {
AttributeEntry ae = (AttributeEntry) attrs.elementAt(i);
String name = nameIndexToString(ae.getNameIndex());
if (name.equals("Code")) processCodeAttribute(member, ae);
else if (name.equals("Exceptions")) ; // leave in
else if (name.equals("Deprecated")) ; // leave in
else if (name.equals("Synthetic")) ; // leave in
else System.err.println("WARNING - Unknown method attribute " + name);
}
if (attrs.size() == 0) member.attribute_info = null;
}
}
}
