trait Visitor[-T, +J] extends AnyRef
Standard set of hooks uPickle uses to traverse over a structured data. A superset of the JSON, MessagePack, and Scala object hierarchies, since it needs to support efficiently processing all of them.
Note that some parameters are un-set (-1) when not available; e.g.
visitArray
's length
is not set when parsing JSON input (since it cannot
be known up front) and the various index
parameters are not set when
traversing Scala object hierarchies.
When expecting to deal with a subset of the methods; it is common to
forward the ones you don't care about to the ones you do; e.g. JSON visitors
would forward all visitFloat32
/visitInt
/etc. methods to visitFloat64
- T
???
- J
the result of visiting elements (e.g. a json AST or side-effecting writer)
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Abstract Value Members
- abstract def visitArray(length: Int, index: Int): ArrVisitor[T, J]
- index
json source position at the start of the
[
being visited- returns
a Visitor used for visiting the elements of the array
- abstract def visitBinary(bytes: Array[Byte], offset: Int, len: Int, index: Int): J
- abstract def visitChar(s: Char, index: Int): J
- abstract def visitExt(tag: Byte, bytes: Array[Byte], offset: Int, len: Int, index: Int): J
- abstract def visitFalse(index: Int): J
- index
json source position at the start of the
false
being visited
- abstract def visitFloat32(d: Float, index: Int): J
- abstract def visitFloat64(d: Double, index: Int): J
Optional handler for raw double values; can be overriden for performance in cases where you're translating directly between numbers to avoid the overhead of stringifying and re-parsing your numbers (e.g.
Optional handler for raw double values; can be overriden for performance in cases where you're translating directly between numbers to avoid the overhead of stringifying and re-parsing your numbers (e.g. the WebJson transformer gets raw doubles from the underlying Json.parse).
Delegates to
visitFloat64StringParts
if not overriden- d
the input number
- index
json source position at the start of the number being visited
- abstract def visitFloat64String(s: String, index: Int): J
Convenience methods to help you compute the decimal-point-index and exponent-index of an arbitrary numeric string
Convenience methods to help you compute the decimal-point-index and exponent-index of an arbitrary numeric string
- s
the text string being visited
- index
json source position at the start of the string being visited
- abstract def visitFloat64StringParts(s: CharSequence, decIndex: Int, expIndex: Int, index: Int): J
Visit the number in its text representation.
Visit the number in its text representation.
- s
unparsed text representation of the number.
- decIndex
index of the
.
, relative to the start of the CharSequence, or -1 if omitted- expIndex
index of
e
orE
relative to the start of the CharSequence, or -1 if omitted- index
json source position at the start of the number being visited
- abstract def visitInt32(i: Int, index: Int): J
- abstract def visitInt64(i: Long, index: Int): J
- abstract def visitNull(index: Int): J
- index
json source position at the start of the
null
being visited
- abstract def visitObject(length: Int, index: Int): ObjVisitor[T, J]
- index
json source position at the start of the
{
being visited- returns
a ObjVisitor used for visiting the keys/values of the object
- abstract def visitString(s: CharSequence, index: Int): J
- s
the text string being visited
- index
json source position at the start of the string being visited
- abstract def visitTrue(index: Int): J
- index
json source position at the start of the
true
being visited
- abstract def visitUInt64(i: Long, index: Int): J
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- def map[Z](f: (J) => Z): Visitor[T, Z]
- def mapNulls[Z](f: (J) => Z): Visitor[T, Z]
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