@Override
public E deserialize(DataInput in, int available) throws IOException {
final int unpackedSize = DataInput2.unpackInt(in) - 1;
if (unpackedSize == -1) {
// was not compressed
return serializer.deserialize(in, available > 0 ? available - 1 : available);
}
byte[] unpacked = new byte[unpackedSize];
LZF.get().expand(in, unpacked, 0, unpackedSize);
DataIO.DataInputByteArray in2 = new DataIO.DataInputByteArray(unpacked);
E ret = serializer.deserialize(in2, unpackedSize);
assert (in2.getPos() == unpackedSize) : "data were not fully read";
return ret;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
org.mapdb.impl.CompressionWrapper that = (org.mapdb.impl.CompressionWrapper) o;
return serializer.equals(that.serializer);
}
@Override
public void serialize(DataOutput out, E value) throws IOException {
DataOutput2 out2 = new DataOutput2();
serializer.serialize(out2, value);
byte[] tmp = new byte[out2.pos + 41];
int newLen;
try {
newLen = LZF.get().compress(out2.buf, out2.pos, tmp, 0);
} catch (IndexOutOfBoundsException e) {
newLen = 0; // larger after compression
}
if (newLen >= out2.pos) {
// compression adds size, so do not compress
DataOutput2.packInt(out, 0);
out.write(out2.buf, 0, out2.pos);
return;
}
DataOutput2.packInt(out, out2.pos + 1); // unpacked size, zero indicates no compression
out.write(tmp, 0, newLen);
}
@Override
public int hashCode() {
return serializer.hashCode();
}