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package net.gcdc.asn1.uper;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.ArrayDeque;
import java.util.Deque;
import net.gcdc.asn1.datatypes.Asn1Default;
import net.gcdc.asn1.datatypes.Asn1SequenceOf;
import net.gcdc.asn1.datatypes.Sequence;
import net.gcdc.asn1.uper.UperEncoder.Asn1ContainerFieldSorter;
class SequenceCoder implements Decoder, Encoder {
@Override public <T> boolean canEncode(T obj, Annotation[] extraAnnotations) {
Class<?> type = obj.getClass();
AnnotationStore annotations = new AnnotationStore(type.getAnnotations(), extraAnnotations);
return annotations.getAnnotation(Sequence.class) != null;
}
@Override public <T> void encode(BitBuffer bitbuffer, T obj, Annotation[] extraAnnotations) throws Asn1EncodingException {
Class<?> type = obj.getClass();
AnnotationStore annotations = new AnnotationStore(type.getAnnotations(), extraAnnotations);
String pos = String.format("%d.%d", bitbuffer.position()/8 , bitbuffer.position() % 8);
UperEncoder.logger.debug(String.format("Position %s: SEQUENCE %s", pos, type.getSimpleName()));
Asn1ContainerFieldSorter sorter = new Asn1ContainerFieldSorter(type);
try {
if (UperEncoder.hasExtensionMarker(annotations)) {
boolean extensionsPresent = !sorter.extensionFields.isEmpty()
&& UperEncoder.hasNonNullExtensions(obj, sorter);
UperEncoder.logger.debug(String.format("with extension marker, %s extensions, extensionBit: <%s>",
extensionsPresent ? "with" : "without", extensionsPresent));
bitbuffer.put(extensionsPresent);
}
// Bitmask for optional fields.
for (Field f : sorter.optionalOrdinaryFields) {
boolean fieldPresent = isPresent(f, f.get(obj));
UperEncoder.logger.debug(String.format("with optional field %s %s, presence encoded as bit <%s>",
f.getName(), fieldPresent ? "present" : "absent", fieldPresent));
bitbuffer.put(fieldPresent); // null means the field is absent.
}
// All ordinary fields (fields within extension root).
for (Field f : sorter.ordinaryFields) {
//CG do not include default values
if (UperEncoder.isMandatory(f) || isPresent(f,f.get(obj))) {
pos = String.format("Position: %d.%d", bitbuffer.position()/8 , bitbuffer.position() % 8);
UperEncoder.logger.debug(String.format("%s: Field %s", pos, f.getName()));
try {
UperEncoder.encode2(bitbuffer, f.get(obj), f.getAnnotations());
} catch (Asn1EncodingException e) {
throw new Asn1EncodingException("." + f.getName(), e);
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException("Illegal value for field " + f.getName(), e);
}
}
}
// Extension fields.
if (UperEncoder.hasExtensionMarker(annotations)
&& !sorter.extensionFields.isEmpty()
&& UperEncoder.hasNonNullExtensions(obj, sorter)) {
// Total extensions count.
int numExtensions = sorter.extensionFields.size();
UperEncoder.logger.debug(String.format("continuing sequence : %d extension(s) are present, encoding length determinant for them...", numExtensions));
UperEncoder.encodeLengthOfBitmask(bitbuffer, numExtensions);
// Bitmask for present extensions.
for (Field f : sorter.extensionFields) {
boolean fieldIsPresent = isPresent(f,f.get(obj));
UperEncoder.logger.debug(String.format("Extension %s is %s, presence encoded as <%s>", f.getName(),
fieldIsPresent ? "present" : "absent", fieldIsPresent ? "1" : "0"));
bitbuffer.put(fieldIsPresent);
}
// Values of extensions themselves.
for (Field f : sorter.extensionFields) {
//CG do not encode default values
if (UperEncoder.isMandatory(f) || isPresent(f,f.get(obj))) {
UperEncoder.logger.debug(String.format("Encoding extension field %s", f.getName()));
try {
UperEncoder.encodeAsOpenType(bitbuffer, f.get(obj), f.getAnnotations());
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException("Illegal value for extension field " + f.getName(), e);
}
}
}
}
} catch (IllegalArgumentException | IllegalAccessException e) {
throw new IllegalArgumentException("can't encode " + obj, e);
}
sorter.revertAccess();
}
@SuppressWarnings("unchecked")
protected <T> boolean isPresent(Field f, Object fieldObject){
if (fieldObject == null) return false;
boolean fieldPresent = fieldObject != null;
if (fieldObject instanceof Asn1SequenceOf) {
if (((Asn1SequenceOf<T>)fieldObject).size() == 0){
//CG do not encode optional empty sequences
fieldPresent = false;
}
}
if (fieldObject instanceof String) {
if (((String)fieldObject).length() == 0){
//CG do not encode optional empty sequences
fieldPresent = false;
}
}
//CG DEFAULT VALUES
if (fieldPresent && UperEncoder.isDefault(f,fieldObject)) {
UperEncoder.logger.debug(String.format("Field %s has default value", f.getName()));
fieldPresent = false;
}
//CG No ASN1
if (UperEncoder.isNotAsn1(f)) {
fieldPresent = false;
}
return fieldPresent;
}
@Override public <T> boolean canDecode(Class<T> classOfT, Annotation[] extraAnnotations) {
AnnotationStore annotations = new AnnotationStore(classOfT.getAnnotations(),
extraAnnotations);
return annotations.getAnnotation(Sequence.class) != null;
}
@Override public <T> T decode(BitBuffer bitbuffer,
Class<T> classOfT,Field f1,
Annotation[] extraAnnotations) {
UperEncoder.logger.debug(String.format("decode SEQUENCE %s",classOfT.getSimpleName()));
AnnotationStore annotations = new AnnotationStore(classOfT.getAnnotations(),extraAnnotations);
T result = UperEncoder.instantiate(classOfT);
Asn1ContainerFieldSorter sorter = new Asn1ContainerFieldSorter(classOfT);
boolean hasExtensionMarker = UperEncoder.hasExtensionMarker(annotations);
boolean extensionPresent = false;
if (hasExtensionMarker) {
extensionPresent = bitbuffer.get();
UperEncoder.logger.debug(String.format("with extension marker, extension %s", extensionPresent ? "present!" : "absent"));
}
// Bitmask for optional fields.
Deque<Boolean> optionalFieldsMask = new ArrayDeque<>(sorter.optionalOrdinaryFields.size());
for (Field f : sorter.optionalOrdinaryFields) {
optionalFieldsMask.add(bitbuffer.get());
UperEncoder.logger.debug(String.format("with optional field %s %s" , f.getName() , optionalFieldsMask.getLast() ? "present" : "absent"));
}
// All ordinary fields (fields within extension root).
for (Field f : sorter.ordinaryFields) {
if (!UperEncoder.isTestInstrumentation(f) && (UperEncoder.isMandatory(f)
||
(UperEncoder.isOptional(f) && optionalFieldsMask.pop()))) {
UperEncoder.logger.debug(String.format("Field : %s", f.getName()));
try {
f.set(result, UperEncoder.decodeAny(bitbuffer,f.getType(),f, f.getAnnotations()));
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("can't access 'set method' for field " + f + " of class " + classOfT + " " + e, e);
}
} else {
//CG might have a default value
if (f.getAnnotation(Asn1Default.class) != null) {
try {
UperEncoder.logger.debug(String.format(String.format("Retrieve default for element : %s",f.getName())));
f.set(result,UperEncoder.getDefault(f.getType(),f.getAnnotations()));
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException("can't decode " + classOfT, e);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("can't decode " + classOfT, e);
}
}
}
}
if (!hasExtensionMarker) {
//done
sorter.revertAccess();
return result;
}
// Possible extensions
int numExtensions = 0;
if (UperEncoder.hasExtensionMarker(annotations)){
if (extensionPresent) {
// Number of extensions.
numExtensions = (int) UperEncoder.decodeLengthOfBitmask(bitbuffer);
UperEncoder.logger.debug(String.format("sequence has %d extension(s)", numExtensions));
// Bitmask for extensions.
boolean[] bitmaskValueIsPresent = new boolean[numExtensions];
for (int i = 0; i < numExtensions; i++) {
bitmaskValueIsPresent[i] = bitbuffer.get();
UperEncoder.logger.debug(String.format("extension %s is %s", i, bitmaskValueIsPresent[i] ? "present" : "absent"));
}
// Values.
UperEncoder.logger.debug("decoding extensions values...");
for (int i = 0; i < numExtensions; i++) {
UperEncoder.logger.debug(String.format("sequence extension %s %s", i, bitmaskValueIsPresent[i] ? "present" : "absent"));
if (bitmaskValueIsPresent[i]) {
UperEncoder.logger.debug(String.format("decoding extension %d...", i));
Field field = sorter.extensionFields.size() > i ? sorter.extensionFields.get(i) : null;
Class<?> classOfElement = field != null ? field.getType() : null;
if (field != null) {
try {
Object decodedValue = UperEncoder.decodeAsOpenType(bitbuffer, classOfElement,field, field.getAnnotations());
if (field != null) {
field.set(result, decodedValue);
}
} catch (IllegalArgumentException | IllegalAccessException e) {
throw new IllegalArgumentException("can't decode " + classOfT, e);
}
} else {
//CG skip the unknown extension element
UperEncoder.decodeSkipUnknownElement(bitbuffer, classOfT.getSimpleName());
}
} else {
//CG the absent extension filed might have a default value
Field field = sorter.extensionFields.size() > i ? sorter.extensionFields.get(i) : null;
Class<?> classOfElement = field != null ? field.getType() : null;
if (field != null && field.getAnnotation(Asn1Default.class) != null) {
try {
field.set(result,UperEncoder.getDefault(classOfElement,field.getAnnotations()));
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException("can't decode " + classOfElement.getSimpleName(), e);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("can't decode " + classOfElement.getSimpleName(), e);
}
UperEncoder.logger.debug(String.format("Default set for %s", field.getName()));
}
}
}//end of loop on present extension fields
} else {
//CG there is an extension marker but the extension is not present
// then there sill might be an element with a default value
for (Field field : sorter.extensionFields) {
if ( numExtensions <= sorter.extensionFields.indexOf(field)) {
if (field.getAnnotation(Asn1Default.class) != null) {
Class<?> classOfElement = field != null ? field.getType() : null;
try {
field.set(result,UperEncoder.getDefault(classOfElement, field.getAnnotations()));
} catch (IllegalArgumentException e) {
throw new IllegalArgumentException("can't decode default" + classOfElement.getSimpleName(), e);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException("can't decode default" + classOfElement.getSimpleName(), e);
}
}
}
}
} // end of extension handling
}
sorter.revertAccess();
return result;
}
@Override
public <T> T getDefault(Class<T> classOfT, Annotation[] annotations) {
throw new IllegalArgumentException("Default Sequence not yet implemented");
}
}
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