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package net.gcdc.asn1.uper;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.math.BigInteger;
import net.gcdc.asn1.datatypes.Asn1BigInteger;
import net.gcdc.asn1.datatypes.Asn1Default;
import net.gcdc.asn1.datatypes.Asn1Integer;
import net.gcdc.asn1.datatypes.IntMinValue;
import net.gcdc.asn1.datatypes.IntRange;
class IntCoder implements Encoder, Decoder {
@Override public <T> boolean canDecode(Class<T> classOfT, Annotation[] extraAnnotations) {
return classOfT == Asn1Integer.class ||
classOfT == Asn1BigInteger.class||
classOfT == BigInteger.class ||
classOfT == Long.class ||
classOfT == Integer.class ||
classOfT == Short.class ;
}
@Override public <T> T decode(BitBuffer bitbuffer,
Class<T> classOfT, Field field,
Annotation[] extraAnnotations) {
AnnotationStore annotations = new AnnotationStore(classOfT.getAnnotations(),extraAnnotations);
String pos = String.format("Position: %d.%d", bitbuffer.position()/8 , bitbuffer.position() % 8);
UperEncoder.logger.debug(String.format("%s: INTEGER",pos));
IntRange intRange = annotations.getAnnotation(IntRange.class);
IntMinValue minValue = annotations.getAnnotation(IntMinValue.class);
if (intRange == null) {
return decodeUnconstrainedInteger(bitbuffer, classOfT, extraAnnotations, minValue);
}
UperEncoder.logger.debug(String.format("Integer, range %d..%d", intRange.minValue(), intRange.maxValue()));
return decodeConstrainedInteger(bitbuffer, classOfT, intRange, extraAnnotations);
}
@SuppressWarnings("unchecked")
private <T> T decodeConstrainedInteger(BitBuffer bitbuffer, Class<T> classOfT, IntRange intRange, Annotation[] extraAnnotations) {
long value = UperEncoder.decodeConstrainedInt(bitbuffer, intRange);
UperEncoder.logger.debug(String.format("decoded as %d", value));
try {
if (classOfT == Asn1BigInteger.class) {
return ((T) new Asn1BigInteger(value));
} else if (classOfT == Asn1Integer.class) {
return (T) new Asn1Integer(value);
} else if (classOfT == BigInteger.class) {
return (T) BigInteger.valueOf(value);
} else if (classOfT == Long.class) {
return (T) Long.valueOf(value);
} else if (classOfT == Integer.class) {
return (T) Integer.valueOf(Long.valueOf(value).intValue());
} else if (classOfT == Short.class) {
return (T) Short.valueOf(Long.valueOf(value).shortValue());
}
} catch (Exception e) {
throw new IllegalArgumentException("size too small " + classOfT.getName() + ": " + e);
}
return null;
}
@Override public <T> boolean canEncode(T obj, Annotation[] extraAnnotations) {
return obj instanceof Asn1Integer ||
obj instanceof Asn1BigInteger ||
obj instanceof BigInteger ||
obj instanceof Long ||
obj instanceof Integer ||
obj instanceof Short;
}
@Override public <T> void encode(BitBuffer bitbuffer, T obj, Annotation[] extraAnnotations) throws Asn1EncodingException {
Class<?> type = obj.getClass();
AnnotationStore annotations = new AnnotationStore(type.getAnnotations(), extraAnnotations);
IntRange range = annotations.getAnnotation(IntRange.class);
IntMinValue minValue = annotations.getAnnotation(IntMinValue.class);
int position = bitbuffer.position();
//get value
if (range == null) {
try {
encodeUnconstrainedInteger(bitbuffer, obj, extraAnnotations,minValue);
} catch (Asn1EncodingException e) {
throw new Asn1EncodingException(" " + type.getSimpleName(), e);
} catch (Exception e1){
throw new Asn1EncodingException(" " + type.getSimpleName() + " - " + e1.getLocalizedMessage());
}
UperEncoder.logger.debug(String.format("INT(%s): %s", obj, bitbuffer.toBooleanStringFromPosition(position)));
} else {
try {
long value = 0;
if (obj instanceof BigInteger) {
try {
value = ((BigInteger) obj).longValue();
} catch (Exception e) {
UperEncoder.logger.debug("constrained BigInteger is too big for constrained int");
throw new Asn1EncodingException("constrained BigInteger is too big for constrained int" + type.getSimpleName());
}
} if (obj instanceof Asn1BigInteger) {
try {
value = ((Asn1BigInteger) obj).longValue();
} catch (Exception e) {
UperEncoder.logger.debug("constrained Asn1BigInteger is too big for constrained int");
throw new Asn1EncodingException("constrained Asn1BigInteger is too big for constrained int" + type.getSimpleName());
}
} if (obj instanceof Asn1Integer) {
try {
value = Asn1Integer.toLong((Asn1Integer) obj);
} catch (Exception e) {
UperEncoder.logger.debug("constrained BigInteger is too big for constrained int");
throw new Asn1EncodingException("constrained BigInteger is too big for constrained int" + type.getSimpleName());
}
} else if (obj instanceof Long) {
value = ((Long) obj).longValue();
} else if (obj instanceof Integer) {
value = ((Integer) obj).longValue();
} else if (obj instanceof Short) {
value = ((Short) obj).longValue();
}
UperEncoder.encodeConstrainedInt(bitbuffer, value, range.minValue(), range.maxValue(), range.hasExtensionMarker());
} catch (Asn1EncodingException e) {
throw new Asn1EncodingException(" " + type.getSimpleName(), e);
} catch (Exception e1){
throw new Asn1EncodingException(" " + type.getSimpleName() + " - " + e1.getLocalizedMessage());
}
UperEncoder.logger.debug(String.format("INT(%s): %s", obj, bitbuffer.toBooleanStringFromPosition(position)));
}
return;
}
private <T> void encodeUnconstrainedInteger(BitBuffer bitbuffer, Object obj, Annotation[] annotations, IntMinValue minValue) throws Asn1EncodingException {
BigInteger bint = null;
try {
if (obj instanceof BigInteger) {
bint = (BigInteger) obj;
} else if (obj instanceof Asn1BigInteger) {
bint = BigInteger.valueOf(((Asn1BigInteger) obj).longValue());
} else if (obj instanceof Asn1Integer) {
bint = BigInteger.valueOf(((Asn1Integer) obj).value());
} else if (obj instanceof Long) {
bint = BigInteger.valueOf(((Long) obj).longValue());
} else if (obj instanceof Integer) {
bint = BigInteger.valueOf(((Integer) obj).longValue());
} else if (obj instanceof Short) {
bint = BigInteger.valueOf(((Short) obj).longValue());
}
} catch (Exception e1){
throw new Asn1EncodingException(" " + obj.getClass().getSimpleName() + " - " + e1.getLocalizedMessage());
}
if (minValue != null) {
bint.subtract(BigInteger.valueOf(minValue.minValue()));
}
byte[] array = bint.toByteArray();
int lengthInOctets = array.length;
int position1 = bitbuffer.position();
try {
UperEncoder.encodeLengthDeterminant(bitbuffer, lengthInOctets);
} catch (Asn1EncodingException e) {
throw new Asn1EncodingException(" length determinant of INTEGER", e);
}
int position2 = bitbuffer.position();
for (byte b : array) {
bitbuffer.putByte(b);
}
UperEncoder.logger.debug(String.format("INTEGER Int(%s): len %s, val %s", bint.toString(),
bitbuffer.toBooleanString(position1, position2 - position1),
bitbuffer.toBooleanStringFromPosition(position2)));
return;
}
@SuppressWarnings("unchecked")
public <T> T decodeUnconstrainedInteger(BitBuffer bitbuffer, Class<T> classOfT, Annotation[] extraAnnotations,IntMinValue minValue) {
AnnotationStore annotations = new AnnotationStore(classOfT.getAnnotations(), extraAnnotations);
String pos = String.format("%d.%d", bitbuffer.position()/8 , bitbuffer.position() % 8);
UperEncoder.logger.debug(String.format("Position %s BIG INT",pos));
IntRange intRange = annotations.getAnnotation(IntRange.class);
if (intRange != null && intRange.maxValue() > 0) {
throw new UnsupportedOperationException("Big int with upper range is not supported yet");
}
int lengthInOctets = (int) UperEncoder.decodeLengthDeterminant(bitbuffer);
BitBuffer valueBits = ByteBitBuffer.allocate(lengthInOctets * 8);
for (int i = 0; i < lengthInOctets * 8; i++) {
valueBits.put(bitbuffer.get());
}
valueBits.flip();
BigInteger resultValue = new BigInteger(+1, valueBits.array());
if (minValue != null) {
resultValue.add(BigInteger.valueOf(minValue.minValue()));
}
UperEncoder.logger.debug(String.format("INTEGER Decoded as %s", resultValue));
try {
if (classOfT == Asn1BigInteger.class) {
return (T) new Asn1BigInteger(resultValue);
} else if (classOfT == BigInteger.class) {
return (T) resultValue;
} else if (classOfT == Long.class) {
return (T) Long.valueOf(resultValue.longValueExact());
} else if (classOfT == Integer.class) {
return (T) Integer.valueOf(resultValue.intValueExact());
} else if (classOfT == Short.class) {
return (T) Short.valueOf(resultValue.shortValueExact());
}
} catch (Exception e){
UperEncoder.logger.debug(String.format("INTEGER Decoded as %s is too big for data type", resultValue));
}
return null;
}
@SuppressWarnings("unchecked")
@Override
public <T> T getDefault(Class<T> classOfT, Annotation[] extraAnnotations) {
AnnotationStore annotations = new AnnotationStore(classOfT.getAnnotations(), extraAnnotations);
Asn1Default defaultAnnotation = annotations.getAnnotation(Asn1Default.class);
if (defaultAnnotation == null) return null;
//check whether the class has a constructor for numeric types
String valueString = defaultAnnotation.value();
long value = Long.parseLong(valueString);
try {
if (classOfT == Asn1BigInteger.class) {
return ((T) new Asn1BigInteger(value));
} else if (classOfT == BigInteger.class) {
return (T) BigInteger.valueOf(value);
} else if (classOfT == Long.class) {
return (T) Long.valueOf(value);
} else if (classOfT == Integer.class) {
return (T) Integer.valueOf(Long.valueOf(value).intValue());
} else if (classOfT == Short.class) {
return (T) Short.valueOf(Long.valueOf(value).shortValue());
}
} catch (Exception e) {
throw new IllegalArgumentException("size too small " + classOfT.getName() + ": " + e);
}
return null;
}
}
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