[Java] Class IndentPrinter

groovy.util.IndentPrinter

public class IndentPrinter
extends Object

A helper class for printing indented text. This can be used stand-alone or, more commonly, from Builders.

By default, a PrintWriter to System.out is used as the Writer, but it is possible to change the Writer by passing a new one as a constructor argument.

Indention by default is 2 characters but can be changed by passing a different value as a constructor argument.

The following is an example usage. Note that within a "with" block you need to specify a parameter name so that this.println is not called instead of IndentPrinter.println:

 new IndentPrinter(new PrintWriter(out)).with { p ->
     p.printIndent()
     p.println('parent1')
     p.incrementIndent()
     p.printIndent()
     p.println('child 1')
     p.printIndent()
     p.println('child 2')
     p.decrementIndent()
     p.printIndent()
     p.println('parent2')
     p.flush()
 }

The above example prints this to standard output:

 parent1
   child 1
   child 2
 parent2

Constructor Summary

Constructors
Constructor and description
`IndentPrinter ()` Creates an IndentPrinter backed by a PrintWriter pointing to System.out, with an indent of two spaces.
`IndentPrinter (Writer out)` Creates an IndentPrinter backed by the supplied Writer, with an indent of two spaces.
`IndentPrinter (Writer out, String indent)` Creates an IndentPrinter backed by the supplied Writer, with a user-supplied String to be used for indenting.
`IndentPrinter (Writer out, String indent, boolean addNewlines)` Creates an IndentPrinter backed by the supplied Writer, with a user-supplied String to be used for indenting and the ability to override newline handling.
`IndentPrinter (Writer out, String indent, boolean addNewlines, boolean autoIndent)` Create an IndentPrinter to the given PrintWriter

Methods Summary

Methods
Type Params	Return Type	Name and description
	`public void`	`decrementIndent()`
	`public void`	`flush()`
	`public boolean`	`getAutoIndent()`
	`public int`	`getIndentLevel()`
	`public void`	`incrementIndent()`
	`public void`	`print(String text)` Prints a string.
	`public void`	`print(char c)` Prints a character.
	`public void`	`printIndent()` Prints the current indent level.
	`public void`	`println(String text)` Prints a string followed by an end of line character.
	`public void`	`println()` Prints an end-of-line character (if enabled via addNewLines property).
	`public void`	`setAutoIndent(boolean autoIndent)`
	`public void`	`setIndentLevel(int indentLevel)`

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class Object`	`wait, wait, wait, equals, toString, hashCode, getClass, notify, notifyAll`

Constructor Detail

public IndentPrinter()

Creates an IndentPrinter backed by a PrintWriter pointing to System.out, with an indent of two spaces.

See Also:: IndentPrinter(Writer, String)

public IndentPrinter(Writer out)

Creates an IndentPrinter backed by the supplied Writer, with an indent of two spaces.

Parameters:: out - Writer to output to

See Also:: IndentPrinter(Writer, String)

public IndentPrinter(Writer out, String indent)

Creates an IndentPrinter backed by the supplied Writer, with a user-supplied String to be used for indenting.

Parameters:: out - Writer to output to; indent - character(s) used to indent each line

public IndentPrinter(Writer out, String indent, boolean addNewlines)

Creates an IndentPrinter backed by the supplied Writer, with a user-supplied String to be used for indenting and the ability to override newline handling.

Parameters:: out - Writer to output to; indent - character(s) used to indent each line; addNewlines - set to false to gobble all new lines (default true)

public IndentPrinter(Writer out, String indent, boolean addNewlines, boolean autoIndent)

Create an IndentPrinter to the given PrintWriter

Parameters:: out - Writer to output to; indent - character(s) used to indent each line; addNewlines - set to false to gobble all new lines (default true); autoIndent - set to true to make println() prepend the indent automatically (default false)

Method Detail

public void decrementIndent()

public void flush()

public boolean getAutoIndent()

public int getIndentLevel()

public void incrementIndent()

public void print(String text)

Prints a string.

Parameters:: text - String to be written

public void print(char c)

Prints a character.

Parameters:: c - char to be written

public void printIndent()

Prints the current indent level.

public void println(String text)

Prints a string followed by an end of line character.

Parameters:: text - String to be written

public void println()

Prints an end-of-line character (if enabled via addNewLines property). Defaults to outputting a single '\n' character but by using a custom Writer, e.g. PlatformLineWriter, you can get platform-specific end-of-line characters.

See Also:: IndentPrinter(Writer, String, boolean)

public void setAutoIndent(boolean autoIndent)

public void setIndentLevel(int indentLevel)

© 2003-2020 The Apache Software Foundation
Licensed under the Apache license.
https://docs.groovy-lang.org/3.0.7/html/gapi/groovy/util/IndentPrinter.html