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io.prestosql.jdbc.$internal.jackson.datatype.guava.ser.RangeSerializer Maven / Gradle / Ivy
package io.prestosql.jdbc.$internal.jackson.datatype.guava.ser;
import java.io.IOException;
import io.prestosql.jdbc.$internal.jackson.core.*;
import io.prestosql.jdbc.$internal.jackson.core.type.WritableTypeId;
import io.prestosql.jdbc.$internal.jackson.databind.*;
import io.prestosql.jdbc.$internal.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
import io.prestosql.jdbc.$internal.jackson.databind.jsonFormatVisitors.JsonObjectFormatVisitor;
import io.prestosql.jdbc.$internal.jackson.databind.jsontype.TypeSerializer;
import io.prestosql.jdbc.$internal.jackson.databind.ser.ContextualSerializer;
import io.prestosql.jdbc.$internal.jackson.databind.ser.std.StdSerializer;
import io.prestosql.jdbc.$internal.jackson.datatype.guava.deser.util.RangeHelper;
import io.prestosql.jdbc.$internal.guava.collect.BoundType;
import io.prestosql.jdbc.$internal.guava.collect.Range;
/**
* Jackson serializer for a Guava {@link Range}.
*/
@SuppressWarnings("serial")
public class RangeSerializer extends StdSerializer>
implements ContextualSerializer
{
protected final JavaType _rangeType;
protected final JsonSerializer _endpointSerializer;
protected final RangeHelper.RangeProperties _fieldNames;
/*
/**********************************************************
/* Life-cycle
/**********************************************************
*/
public RangeSerializer(JavaType type) { this(type, null); }
@Deprecated // since 2.10
public RangeSerializer(JavaType type, JsonSerializer endpointSer)
{
this(type, endpointSer, RangeHelper.standardNames());
}
/**
* @since 2.10
*/
@SuppressWarnings("unchecked")
public RangeSerializer(JavaType type, JsonSerializer endpointSer,
RangeHelper.RangeProperties fieldNames)
{
super(type);
_rangeType = type;
_endpointSerializer = (JsonSerializer) endpointSer;
_fieldNames = fieldNames;
}
@Override
@Deprecated
public boolean isEmpty(Range value) {
return isEmpty(null, value);
}
@Override
public boolean isEmpty(SerializerProvider prov, Range value) {
return value.isEmpty();
}
@Override
public JsonSerializer createContextual(SerializerProvider prov,
BeanProperty property) throws JsonMappingException
{
final PropertyNamingStrategy propertyNamingStrategy = prov.getConfig().getPropertyNamingStrategy();
final RangeHelper.RangeProperties nameMapping = RangeHelper.getPropertyNames(prov.getConfig(), propertyNamingStrategy);
JsonSerializer endpointSer = _endpointSerializer;
if (endpointSer == null) {
JavaType endpointType = _rangeType.containedTypeOrUnknown(0);
// let's not consider "untyped" (java.lang.Object) to be meaningful here...
if (endpointType != null && !endpointType.hasRawClass(Object.class)) {
JsonSerializer ser = prov.findValueSerializer(endpointType, property);
return new RangeSerializer(_rangeType, ser, nameMapping);
}
/* 21-Sep-2014, tatu: Need to make sure all serializers get proper contextual
* access, in case they rely on annotations on properties... (or, more generally,
* in getting a chance to be contextualized)
*/
} else if (endpointSer instanceof ContextualSerializer) {
endpointSer = ((ContextualSerializer) endpointSer).createContextual(prov, property);
}
if ((endpointSer != _endpointSerializer) || (nameMapping != null)) {
return new RangeSerializer(_rangeType, endpointSer, nameMapping);
}
return this;
}
/*
/**********************************************************
/* Serialization methods
/**********************************************************
*/
@Override
public void serialize(Range value, JsonGenerator gen, SerializerProvider provider)
throws IOException, JsonGenerationException
{
gen.writeStartObject(value);
_writeContents(value, gen, provider);
gen.writeEndObject();
}
@Override
public void serializeWithType(Range value, JsonGenerator gen, SerializerProvider provider,
TypeSerializer typeSer)
throws IOException
{
gen.setCurrentValue(value);
WritableTypeId typeIdDef = typeSer.writeTypePrefix(gen,
typeSer.typeId(value, JsonToken.START_OBJECT));
_writeContents(value, gen, provider);
typeSer.writeTypeSuffix(gen, typeIdDef);
}
private void _writeContents(Range value, JsonGenerator g, SerializerProvider provider)
throws IOException
{
if (value.hasLowerBound()) {
final String fieldName = _fieldNames.lowerEndpoint;
if (_endpointSerializer != null) {
g.writeFieldName(fieldName);
_endpointSerializer.serialize(value.lowerEndpoint(), g, provider);
} else {
provider.defaultSerializeField(fieldName, value.lowerEndpoint(), g);
}
// 20-Mar-2016, tatu: Should not use default handling since it leads to
// [datatypes-collections#12] with default typing
g.writeStringField(_fieldNames.lowerBoundType, value.lowerBoundType().name());
}
if (value.hasUpperBound()) {
final String fieldName = _fieldNames.upperEndpoint;
if (_endpointSerializer != null) {
g.writeFieldName(fieldName);
_endpointSerializer.serialize(value.upperEndpoint(), g, provider);
} else {
provider.defaultSerializeField(fieldName, value.upperEndpoint(), g);
}
// same as above; should always be just String so
g.writeStringField(_fieldNames.upperBoundType, value.upperBoundType().name());
}
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
throws JsonMappingException
{
if (visitor != null) {
JsonObjectFormatVisitor objectVisitor = visitor.expectObjectFormat(typeHint);
if (objectVisitor != null) {
if (_endpointSerializer != null) {
JavaType endpointType = _rangeType.containedType(0);
JavaType btType = visitor.getProvider().constructType(BoundType.class);
JsonSerializer btSer = visitor.getProvider()
.findValueSerializer(btType, null);
objectVisitor.property(_fieldNames.lowerEndpoint, _endpointSerializer, endpointType);
objectVisitor.property(_fieldNames.lowerBoundType, btSer, btType);
objectVisitor.property(_fieldNames.upperEndpoint, _endpointSerializer, endpointType);
objectVisitor.property(_fieldNames.upperBoundType, btSer, btType);
}
}
}
}
}
