groovy.json

Class JsonLexer

java.lang.Object

groovy.json.JsonLexer

All Implemented Interfaces:

Iterator<JsonToken>

public class JsonLexer
extends Object
implements Iterator<JsonToken>

The lexer reads JSON tokens in a streaming fashion from the underlying reader.

Since:

1.8.0

Author:

Guillaume Laforge

Constructor Summary

Constructors

Constructor and Description
JsonLexer(Reader reader) Instantiates a lexer with a reader from which to read JSON tokens.

Method Summary

Modifier and Type	Method and Description
LineColumnReader	getReader() Underlying reader from which to read the JSON tokens.
boolean	hasNext() Iterator method to know if another token follows, or if we've reached the end of the stream.
JsonToken	next() Iterator method to get the next token of the stream.
JsonToken	nextToken()
void	remove() Method not implemented.
int	skipWhitespace() Skips all the whitespace characters and moves the cursor to the next non-space character.
static String	unescape(String input) Replace unicode escape and other control characters with real characters

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

JsonLexer

public JsonLexer(Reader reader)

Instantiates a lexer with a reader from which to read JSON tokens. Under the hood, the reader is wrapped in a LineColumnReader, for line and column information, unless it's already an instance of that class.

Parameters:

reader - underlying reader

Method Detail

getReader

public LineColumnReader getReader()

Underlying reader from which to read the JSON tokens. This reader is an instance of LineColumnReader, to keep track of line and column positions.

nextToken

public JsonToken nextToken()

Returns:

the next token from the stream

unescape

public static String unescape(String input)

Replace unicode escape and other control characters with real characters

Parameters:

input - text

Returns:

input text without the escaping

skipWhitespace

public int skipWhitespace()

Skips all the whitespace characters and moves the cursor to the next non-space character.

hasNext

public boolean hasNext()

Iterator method to know if another token follows, or if we've reached the end of the stream.

Specified by:

hasNext in interface Iterator<JsonToken>

Returns:

true if there are more tokens

next

public JsonToken next()

Iterator method to get the next token of the stream.

Specified by:

next in interface Iterator<JsonToken>

Returns:

the next token

remove

public void remove()

Method not implemented.

Specified by:

remove in interface Iterator<JsonToken>

Throws:

UnsupportedOperationException