Package io.crums.model.hashing

Class Parser

java.lang.Object

io.crums.model.hashing.Parser

public class Parser
extends java.lang.Object

Base parser for the grammar. This is a super-simple grammar, so we do away with a formal specification.

Grammer

Each object represents a final sequence of bytes. There are 4 types object:

1. Literal. An even sequence of hexadecimal digits, each pair specifying a byte value.
2. Grouped Symbols [ ]. An object whose bytes are the concatentation of the bytes of a non-empty sequence of objects. The object sequence is bounded by brackets .
3. Flipped Symbol :. A pair of adjacent objects separated by a colon and by the rules of our grammar, transposed in position.
4. Hashed. Symbols ( ). An object whose bytes are the hash of a concatenated sequence of objects bound by parentheses.

Whitespace is the usual neutral delimiter. In the absence of an explicit operator (i.e. ':'), the default binary operation between adjacent objects is concatenation.

See Also:

Shunting-yard algorithm

Method Summary

Modifier and Type	Method	Description
static Construct	parse(java.io.Reader reader)	Parsers the given stream and return the result as a Construct.
static Construct	parse(java.lang.String snippet)	Parses the given snippet and returns it as a Construct.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

parse

public static Construct parse(java.lang.String snippet)

Parses the given snippet and returns it as a Construct.

parse

public static Construct parse(java.io.Reader reader)
                       throws java.io.UncheckedIOException

Parsers the given stream and return the result as a Construct. The stream is read to the end.

Throws:

java.io.UncheckedIOException