JsonWriter (Starjava TTOOLS API)

java.lang.Object
- uk.ac.starlink.ttools.taplint.JsonWriter

```
public class JsonWriter
extends java.lang.Object
```
Outputs an object as JSON. Classes List, Map, Number and Boolean are recognised. Arrays are not. If there is a non-string where a string is required, it's just forced to a string by calling its toString method.

Since:

23 Oct 2016

Author:

Mark Taylor

Constructor Summary

Constructors
Constructor Description

JsonWriter()
Constructor with default properties.

JsonWriter(int indent, boolean spacer)
Custom constructor.

Constructors
Constructor	Description
`JsonWriter()`	Constructor with default properties.
`JsonWriter(int indent, boolean spacer)`	Custom constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`getIndent(int level)`	Returns prepended whitespace.
`java.lang.String`	`jsonPair(java.lang.String key, java.lang.Object value, int level, boolean isPositioned)`	Serialises a key-value pair to JSON.
`java.lang.String`	`toJson(java.lang.Object item)`	Converts an item to JSON.
`void`	`toJson(java.lang.StringBuffer sbuf, java.lang.Object item, int level, boolean isPositioned)`	Recursive method which does the work for conversion.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - JsonWriter
```
public JsonWriter()
```
    Constructor with default properties.
  - JsonWriter
```
public JsonWriter(int indent,
                  boolean spacer)
```
    Custom constructor.
    
    Parameters:
    
    indent - number of characters indent per level
    
    spacer - whether to put spaces inside brackets
- Method Detail
  - toJson
```
public java.lang.String toJson(java.lang.Object item)
```
    Converts an item to JSON.
    
    Parameters:
    
    item - suitable object
    
    Returns:
    
    JSON representation
  - toJson
```
public void toJson(java.lang.StringBuffer sbuf,
                   java.lang.Object item,
                   int level,
                   boolean isPositioned)
```
    Recursive method which does the work for conversion. If possible, call this method with isPositioned=false.
    
    Parameters:
    
    sbuf - string buffer to append result to
    
    item - object to convert
    
    level - current indentation level
    
    isPositioned - true if output should be direct to sbuf, false if it needs a newline plus indentation first
  - getIndent
```
public java.lang.String getIndent(int level)
```
    Returns prepended whitespace.
    
    Parameters:
    
    level - indentation level
    
    Returns:
    
    string to prepend
  - jsonPair
```
public java.lang.String jsonPair(java.lang.String key,
                                 java.lang.Object value,
                                 int level,
                                 boolean isPositioned)
```
    Serialises a key-value pair to JSON.
    
    Parameters:
    
    key - key string
    
    value - value object
    
    level - indentation level
    
    isPositioned - true if output should be direct to sbuf, false if it needs a newline plus indentation first
    
    Returns:
    
    pair representation

Class JsonWriter

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

JsonWriter

JsonWriter

Method Detail

toJson

toJson

getIndent

jsonPair