ObjectParser(ObjectParser that, Expression value, Type schemaType)
{
typeAlias = that.typeAlias;
objParam = that.objParam;
this.value = value;
this.schemaType = schemaType;
objectType = value.Type;
hierarchyDepth = schemaType.GetHierarchyDepth();
}
ObjectParser(ObjectParser that, Expression value, Type schemaType)
{
typeAlias = that.typeAlias;
objParam = that.objParam;
this.value = value;
this.schemaType = schemaType;
objectType = value.Type;
hierarchyDepth = schemaType.GetHierarchyDepth();
}
Expression Field(ITransform transform, Expression structVar, UInt16 id, ISchemaField schemaField, IField field)
{
var fieldSchemaType = schemaField.GetSchemaType();
var fieldId = Expression.Constant(id);
var fieldType = Expression.Constant(fieldSchemaType.GetBondDataType());
var fieldValue = DataExpression.PropertyOrField(structVar, schemaField.Name);
var parser = new ObjectParser(this, fieldValue, fieldSchemaType);
var processField = field != null
? field.Value(parser, fieldType)
: transform.UnknownField(parser, fieldType, fieldId) ?? Expression.Empty();
var omitField = field != null
? field.Omitted : Expression.Empty();
Expression cannotOmit;
if (fieldSchemaType.IsBondStruct() || fieldSchemaType.IsBonded() || schemaField.GetModifier() != Modifier.Optional)
{
cannotOmit = Expression.Constant(true);
}
else
{
var defaultValue = schemaField.GetDefaultValue();
if (fieldSchemaType.IsBondBlob())
{
cannotOmit = Expression.NotEqual(
typeAlias.Convert(fieldValue, fieldSchemaType),
Expression.Default(typeof(ArraySegment <byte>)));
}
else if (fieldSchemaType.IsBondContainer())
{
cannotOmit = defaultValue == null
? Expression.NotEqual(fieldValue, Expression.Constant(null))
: Expression.NotEqual(ContainerCount(fieldValue), Expression.Constant(0));
}
else
{
cannotOmit = Expression.NotEqual(fieldValue, Expression.Constant(defaultValue));
}
}
return(PrunedExpression.IfThenElse(cannotOmit, processField, omitField));
}
Expression Nullable(ContainerHandler handler)
{
Debug.Assert(schemaType.IsBondNullable());
var valueType = schemaType.GetValueType();
var count = Expression.Variable(typeof(int), "count");
ParameterExpression convertedBlob = null;
var nullableValue = value;
var valueParser = new ObjectParser(this, value, valueType);
if (valueType.IsBondBlob())
{
convertedBlob = Expression.Variable(typeof(ArraySegment <byte>), "convertedBlob");
nullableValue = Expression.Property(convertedBlob, "Array");
valueParser = new ObjectParser(this, convertedBlob, convertedBlob.Type);
}
var notNull = Expression.NotEqual(nullableValue, Expression.Constant(null));
var loop = handler(
valueParser,
Expression.Constant(valueType.GetBondDataType()),
Expression.NotEqual(Expression.PostDecrementAssign(count), Expression.Constant(0)),
count,
null);
if (convertedBlob != null)
{
return(Expression.Block(
new[] { convertedBlob, count },
Expression.Assign(convertedBlob, typeAlias.Convert(value, valueType)),
Expression.Assign(count, Expression.Condition(notNull, Expression.Constant(1), Expression.Constant(0))),
loop));
}
else
{
return(Expression.Block(
new[] { count },
Expression.Assign(count, Expression.Condition(notNull, Expression.Constant(1), Expression.Constant(0))),
loop));
}
}
Expression Field(ITransform transform, Expression structVar, UInt16 id, ISchemaField schemaField, IField field)
{
var fieldSchemaType = schemaField.GetSchemaType();
var fieldId = Expression.Constant(id);
var fieldType = Expression.Constant(fieldSchemaType.GetBondDataType());
var fieldValue = DataExpression.PropertyOrField(structVar, schemaField.Name);
var parser = new ObjectParser(this, fieldValue, fieldSchemaType);
var processField = field != null
? field.Value(parser, fieldType)
: transform.UnknownField(parser, fieldType, fieldId) ?? Expression.Empty();
var omitField = field != null
? field.Omitted : Expression.Empty();
Expression cannotOmit;
if (fieldSchemaType.IsBondStruct() || fieldSchemaType.IsBonded() || schemaField.GetModifier() != Modifier.Optional)
{
cannotOmit = Expression.Constant(true);
}
else
{
var defaultValue = schemaField.GetDefaultValue();
if (fieldSchemaType.IsBondBlob())
{
cannotOmit = Expression.NotEqual(
typeAlias.Convert(fieldValue, fieldSchemaType),
Expression.Default(typeof(ArraySegment<byte>)));
}
else if (fieldSchemaType.IsBondContainer())
{
cannotOmit = defaultValue == null
? Expression.NotEqual(fieldValue, Expression.Constant(null))
: Expression.NotEqual(ContainerCount(fieldValue), Expression.Constant(0));
}
else
{
cannotOmit = Expression.NotEqual(fieldValue, Expression.Constant(defaultValue));
}
}
return PrunedExpression.IfThenElse(cannotOmit, processField, omitField);
}
Expression Field(ITransform transform, Expression structVar, UInt16 id, ISchemaField schemaField, IField field)
{
var fieldSchemaType = schemaField.GetSchemaType();
var fieldId = Expression.Constant(id);
var fieldType = Expression.Constant(fieldSchemaType.GetBondDataType());
var fieldValue = DataExpression.PropertyOrField(structVar, schemaField.Name);
ObjectParser parser = null;
Expression blob = null;
ParameterExpression convertedBlob = null;
// To avoid calling Convert multiple times on the same aliased Blob
// we must construct a new ObjectParser with the expected return type of
// of Convert
if (fieldSchemaType.IsBondBlob())
{
blob = typeAlias.Convert(fieldValue, fieldSchemaType);
convertedBlob = Expression.Variable(blob.Type, "convertedBlob");
if (blob.Type != fieldValue.Type)
{
parser = new ObjectParser(this, convertedBlob, convertedBlob.Type);
}
}
parser = parser ?? new ObjectParser(this, fieldValue, fieldSchemaType);
var processField = field != null
? field.Value(parser, fieldType)
: transform.UnknownField(parser, fieldType, fieldId) ?? Expression.Empty();
var omitField = field != null
? field.Omitted : Expression.Empty();
Expression cannotOmit;
if (fieldSchemaType.IsBondStruct() || fieldSchemaType.IsBonded() || schemaField.GetModifier() != Modifier.Optional)
{
cannotOmit = Expression.Constant(true);
if (fieldSchemaType.IsBondBlob())
{
return(Expression.Block(
new[] { convertedBlob },
Expression.Assign(convertedBlob, blob),
processField));
}
}
else
{
var defaultValue = schemaField.GetDefaultValue();
if (fieldSchemaType.IsBondBlob())
{
var notEqual = Expression.NotEqual(
convertedBlob,
Expression.Default(typeof(ArraySegment <byte>)));
return(Expression.Block(
new[] { convertedBlob },
Expression.Assign(convertedBlob, blob),
PrunedExpression.IfThenElse(notEqual, processField, omitField)));
}
else if (fieldSchemaType.IsBondContainer())
{
cannotOmit = defaultValue == null
? Expression.NotEqual(fieldValue, Expression.Constant(null))
: Expression.NotEqual(ContainerCount(fieldValue), Expression.Constant(0));
}
else
{
cannotOmit = Expression.NotEqual(fieldValue, Expression.Constant(defaultValue));
}
}
return(PrunedExpression.IfThenElse(cannotOmit, processField, omitField));
}
