io.honeybadger.com.fasterxml.jackson.databind.ser.std.ByteBufferSerializer Maven / Gradle / Ivy
package com.fasterxml.jackson.databind.ser.std;
import java.io.*;
import java.nio.ByteBuffer;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonArrayFormatVisitor;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatTypes;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
import com.fasterxml.jackson.databind.util.ByteBufferBackedInputStream;
@SuppressWarnings("serial")
public class ByteBufferSerializer extends StdScalarSerializer
{
public ByteBufferSerializer() { super(ByteBuffer.class); }
@Override
public void serialize(ByteBuffer bbuf, JsonGenerator gen, SerializerProvider provider) throws IOException
{
// first, simple case when wrapping an array...
if (bbuf.hasArray()) {
final int pos = bbuf.position();
gen.writeBinary(bbuf.array(), bbuf.arrayOffset() + pos, bbuf.limit() - pos);
return;
}
// the other case is more complicated however. Best to handle with InputStream wrapper.
// But should we rewind it; and/or make a copy?
ByteBuffer copy = bbuf.asReadOnlyBuffer();
if (copy.position() > 0) {
copy.rewind();
}
InputStream in = new ByteBufferBackedInputStream(copy);
gen.writeBinary(in, copy.remaining());
in.close();
}
@Override // since 2.9
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
// 31-Mar-2017, tatu: Use same type as `ByteArraySerializer`: not optimal but has to do
JsonArrayFormatVisitor v2 = visitor.expectArrayFormat(typeHint);
if (v2 != null) {
v2.itemsFormat(JsonFormatTypes.INTEGER);
}
}
}