/// <summary>
/// Create a new MetaInfo with a copy of the fields in the given metaInfo.
/// </summary>
///
/// <param name="metaInfo">The MetaInfo to copy.</param>
public MetaInfo(MetaInfo metaInfo)
{
this.type_ = net.named_data.jndn.ContentType.BLOB;
this.otherTypeCode_ = -1;
this.freshnessPeriod_ = -1;
this.finalBlockId_ = new Name.Component();
this.changeCount_ = 0;
type_ = metaInfo.type_;
freshnessPeriod_ = metaInfo.freshnessPeriod_;
// Name.Component is read-only, so we don't need a deep copy.
finalBlockId_ = metaInfo.finalBlockId_;
}
/// <summary>
/// Create a new MetaInfo with a copy of the fields in the given metaInfo.
/// </summary>
///
/// <param name="metaInfo">The MetaInfo to copy.</param>
public MetaInfo(MetaInfo metaInfo)
{
this.type_ = net.named_data.jndn.ContentType.BLOB;
this.otherTypeCode_ = -1;
this.freshnessPeriod_ = -1;
this.finalBlockId_ = new Name.Component();
this.changeCount_ = 0;
type_ = metaInfo.type_;
freshnessPeriod_ = metaInfo.freshnessPeriod_;
// Name.Component is read-only, so we don't need a deep copy.
finalBlockId_ = metaInfo.finalBlockId_;
}
/// <summary>
/// Set metaInfo to a copy of the given MetaInfo.
/// </summary>
///
/// <param name="metaInfo">The MetaInfo which is copied.</param>
/// <returns>This Data so that you can chain calls to update values.</returns>
public Data setMetaInfo(MetaInfo metaInfo)
{
metaInfo_.set((metaInfo == null) ? new MetaInfo()
: new MetaInfo(metaInfo));
++changeCount_;
return this;
}
private static void decodeMetaInfo(MetaInfo metaInfo, TlvDecoder decoder,
bool copy)
{
int endOffset = decoder.readNestedTlvsStart(net.named_data.jndn.encoding.tlv.Tlv.MetaInfo);
// The ContentType enum is set up with the correct integer for each
// NDN-TLV ContentType.
int type = (int) decoder.readOptionalNonNegativeIntegerTlv(
net.named_data.jndn.encoding.tlv.Tlv.ContentType, endOffset);
if (type < 0 || type == net.named_data.jndn.ContentType.BLOB.getNumericType())
// Default to BLOB if the value is omitted.
metaInfo.setType(net.named_data.jndn.ContentType.BLOB);
else if (type == net.named_data.jndn.ContentType.LINK.getNumericType())
metaInfo.setType(net.named_data.jndn.ContentType.LINK);
else if (type == net.named_data.jndn.ContentType.KEY.getNumericType())
metaInfo.setType(net.named_data.jndn.ContentType.KEY);
else if (type == net.named_data.jndn.ContentType.NACK.getNumericType())
metaInfo.setType(net.named_data.jndn.ContentType.NACK);
else {
// Unrecognized content type.
metaInfo.setType(net.named_data.jndn.ContentType.OTHER_CODE);
metaInfo.setOtherTypeCode(type);
}
metaInfo.setFreshnessPeriod(decoder.readOptionalNonNegativeIntegerTlv(
net.named_data.jndn.encoding.tlv.Tlv.FreshnessPeriod, endOffset));
if (decoder.peekType(net.named_data.jndn.encoding.tlv.Tlv.FinalBlockId, endOffset)) {
int finalBlockIdEndOffset = decoder
.readNestedTlvsStart(net.named_data.jndn.encoding.tlv.Tlv.FinalBlockId);
metaInfo.setFinalBlockId(decodeNameComponent(decoder, copy));
decoder.finishNestedTlvs(finalBlockIdEndOffset);
} else
metaInfo.setFinalBlockId(null);
decoder.finishNestedTlvs(endOffset);
}
private static void encodeMetaInfo(MetaInfo metaInfo, TlvEncoder encoder)
{
int saveLength = encoder.getLength();
// Encode backwards.
ByteBuffer finalBlockIdBuf = metaInfo.getFinalBlockId().getValue()
.buf();
if (finalBlockIdBuf != null && finalBlockIdBuf.remaining() > 0) {
// FinalBlockId has an inner NameComponent.
int finalBlockIdSaveLength = encoder.getLength();
encodeNameComponent(metaInfo.getFinalBlockId(), encoder);
encoder.writeTypeAndLength(net.named_data.jndn.encoding.tlv.Tlv.FinalBlockId, encoder.getLength()
- finalBlockIdSaveLength);
}
encoder.writeOptionalNonNegativeIntegerTlvFromDouble(
net.named_data.jndn.encoding.tlv.Tlv.FreshnessPeriod, metaInfo.getFreshnessPeriod());
if (!(metaInfo.getType() == net.named_data.jndn.ContentType.BLOB)) {
// Not the default, so we need to encode the type.
if (metaInfo.getType() == net.named_data.jndn.ContentType.LINK
|| metaInfo.getType() == net.named_data.jndn.ContentType.KEY
|| metaInfo.getType() == net.named_data.jndn.ContentType.NACK)
// The ContentType enum is set up with the correct integer for
// each NDN-TLV ContentType.
encoder.writeNonNegativeIntegerTlv(net.named_data.jndn.encoding.tlv.Tlv.ContentType, metaInfo
.getType().getNumericType());
else if (metaInfo.getType() == net.named_data.jndn.ContentType.OTHER_CODE)
encoder.writeNonNegativeIntegerTlv(net.named_data.jndn.encoding.tlv.Tlv.ContentType,
metaInfo.getOtherTypeCode());
else
// We don't expect this to happen.
throw new Exception("unrecognized TLV ContentType");
}
encoder.writeTypeAndLength(net.named_data.jndn.encoding.tlv.Tlv.MetaInfo, encoder.getLength()
- saveLength);
}
