bundles/org.simantics.databoard/src/org/simantics/databoard/serialization/impl/ByteArraySerializer.java

   1 package org.simantics.databoard.serialization.impl;
   2
   3 import java.io.DataInput;
   4 import java.io.DataOutput;
   5 import java.io.IOException;
   6 import java.util.List;
   7
   8 import org.simantics.databoard.binding.ArrayBinding;
   9 import org.simantics.databoard.binding.error.BindingException;
  10 import org.simantics.databoard.serialization.SerializationException;
  11 import org.simantics.databoard.serialization.Serializer.NonRecursiveSerializer;
  12 import org.simantics.databoard.type.ArrayType;
  13 import org.simantics.databoard.util.Range;
  14
  15 public class ByteArraySerializer extends NonRecursiveSerializer {
  16
  17         Range length;
  18         Integer fixedLength, fixedSize;
  19
  20         public ByteArraySerializer(ArrayBinding binding)
  21         {
  22                 ArrayType arrayType = (ArrayType) binding.type();
  23                 this.length = arrayType.getLength();
  24                 if (length!=null && length.getLower().equals(length.getUpper()) && length.getLower().getValue()!=null)
  25                 {
  26                         fixedLength = length.getLower().getValue().intValue();
  27                         fixedSize = fixedLength * 1;
  28                 }
  29         }
  30
  31         @Override
  32         public Object deserialize(DataInput in)
  33         throws IOException
  34         {
  35                 int length = fixedSize != null ? fixedLength : in.readInt();
  36                 if (length<0) throw new SerializationException("Cannot use negative array length");
  37                 assertRemainingBytes(in, length);
  38
  39                 byte[] array = new byte[length];
  40                 in.readFully(array);
  41                 return array;
  42         }
  43
  44         @Override
  45         public void deserializeTo(DataInput in, Object obj) throws IOException {
  46                 try {
  47                         int length = fixedLength != null ? fixedLength : in.readInt();
  48                         byte[] array = (byte[]) obj;
  49                         if (length!=array.length) throw new BindingException("primitive array is size immutable");
  50                         assertRemainingBytes(in, length);
  51                         in.readFully(array);
  52                 } catch (BindingException e) {
  53                         throw new IOException( e );
  54                 }
  55         }
  56
  57         public Object deserializeToTry(DataInput in, List<Object> identities, Object obj) throws IOException
  58         {
  59                 int length = fixedLength != null ? fixedLength : in.readInt();
  60                 byte[] array = (byte[]) obj;
  61                 if (length!=array.length) obj = new byte[ length ];
  62                 assertRemainingBytes(in, length);
  63                 in.readFully(array);
  64                 return array;
  65         }
  66
  67         @Override
  68         public void skip(DataInput in)
  69         throws IOException {
  70                 int length = fixedSize != null ? fixedLength : in.readInt();
  71                 in.skipBytes( length );
  72         }
  73
  74         @Override
  75         public void serialize(DataOutput out, Object obj)
  76         throws IOException
  77         {
  78                 byte[] array = (byte[])obj;
  79                 if (fixedSize==null)
  80                         out.writeInt(array.length);
  81                 out.write(array);
  82         }
  83
  84         @Override
  85         public Integer getConstantSize() {
  86                 return fixedSize;
  87         }
  88
  89         @Override
  90         public int getSize(Object obj) {
  91                 if (fixedSize!=null) return fixedSize;
  92                 byte[] array = (byte[])obj;
  93                 return 4 + array.length;
  94         }
  95
  96         @Override
  97         public int getMinSize() {
  98                 return fixedSize != null ? fixedSize : 4;
  99         }
 100
 101 }