org.apache.logging.log4j.core.tools.picocli

Class CommandLine.Help.Layout

java.lang.Object

org.apache.logging.log4j.core.tools.picocli.CommandLine.Help.Layout

Enclosing class:

CommandLine.Help

public static class CommandLine.Help.Layout
extends Object

Use a Layout to format usage help text for options and parameters in tabular format.

Delegates to the renderers to create CommandLine.Help.Ansi.Text values for the annotated fields, and uses a CommandLine.Help.TextTable to display these values in tabular format. Layout is responsible for deciding which values to display where in the table. By default, Layout shows one option or parameter per table row.

Customize by overriding the layout(Field, CommandLine.Help.Ansi.Text[][]) method.

See Also:

rendering options to text, rendering parameters to text, showing values in a tabular format

Field Summary

Fields

Modifier and Type	Field and Description
protected CommandLine.Help.ColorScheme	colorScheme
protected CommandLine.Help.IOptionRenderer	optionRenderer
protected CommandLine.Help.IParameterRenderer	parameterRenderer
protected CommandLine.Help.TextTable	table

Constructor Summary

Constructors

Constructor and Description
Layout(CommandLine.Help.ColorScheme colorScheme) Constructs a Layout with the specified color scheme, a new default TextTable, the default option renderer, and the default parameter renderer.
Layout(CommandLine.Help.ColorScheme colorScheme, CommandLine.Help.TextTable textTable) Constructs a Layout with the specified color scheme, the specified TextTable, the default option renderer, and the default parameter renderer.
Layout(CommandLine.Help.ColorScheme colorScheme, CommandLine.Help.TextTable textTable, CommandLine.Help.IOptionRenderer optionRenderer, CommandLine.Help.IParameterRenderer parameterRenderer) Constructs a Layout with the specified color scheme, the specified TextTable, the specified option renderer and the specified parameter renderer.

Method Summary

Modifier and Type	Method and Description
void	addOption(Field field, CommandLine.Help.IParamLabelRenderer paramLabelRenderer) Delegates to the option renderer of this layout to obtain text values for the specified CommandLine.Option, and then calls the layout(Field, CommandLine.Help.Ansi.Text[][]) method to write these text values into the correct cells in the TextTable.
void	addOptions(List<Field> fields, CommandLine.Help.IParamLabelRenderer paramLabelRenderer) Calls addOption(Field, CommandLine.Help.IParamLabelRenderer) for all non-hidden Options in the list.
void	addPositionalParameter(Field field, CommandLine.Help.IParamLabelRenderer paramLabelRenderer) Delegates to the parameter renderer of this layout to obtain text values for the specified CommandLine.Parameters, and then calls layout(Field, CommandLine.Help.Ansi.Text[][]) to write these text values into the correct cells in the TextTable.
void	addPositionalParameters(List<Field> fields, CommandLine.Help.IParamLabelRenderer paramLabelRenderer) Calls addPositionalParameter(Field, CommandLine.Help.IParamLabelRenderer) for all non-hidden Parameters in the list.
void	layout(Field field, CommandLine.Help.Ansi.Text[][] cellValues) Copies the specified text values into the correct cells in the CommandLine.Help.TextTable.
String	toString() Returns the section of the usage help message accumulated in the TextTable owned by this layout.

Methods inherited from class java.lang.Object

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

Field Detail

colorScheme

protected final CommandLine.Help.ColorScheme colorScheme

table

protected final CommandLine.Help.TextTable table

optionRenderer

protected CommandLine.Help.IOptionRenderer optionRenderer

parameterRenderer

protected CommandLine.Help.IParameterRenderer parameterRenderer

Constructor Detail

Layout

public Layout(CommandLine.Help.ColorScheme colorScheme)

Constructs a Layout with the specified color scheme, a new default TextTable, the default option renderer, and the default parameter renderer.

Parameters:

colorScheme - the color scheme to use for common, auto-generated parts of the usage help message

Layout

public Layout(CommandLine.Help.ColorScheme colorScheme,
              CommandLine.Help.TextTable textTable)

Constructs a Layout with the specified color scheme, the specified TextTable, the default option renderer, and the default parameter renderer.

Parameters:

colorScheme - the color scheme to use for common, auto-generated parts of the usage help message

textTable - the TextTable to lay out parts of the usage help message in tabular format

Layout

public Layout(CommandLine.Help.ColorScheme colorScheme,
              CommandLine.Help.TextTable textTable,
              CommandLine.Help.IOptionRenderer optionRenderer,
              CommandLine.Help.IParameterRenderer parameterRenderer)

Constructs a Layout with the specified color scheme, the specified TextTable, the specified option renderer and the specified parameter renderer.

Parameters:

colorScheme - the color scheme to use for common, auto-generated parts of the usage help message

optionRenderer - the object responsible for rendering Options to Text

parameterRenderer - the object responsible for rendering Parameters to Text

textTable - the TextTable to lay out parts of the usage help message in tabular format

Method Detail

layout

public void layout(Field field,
                   CommandLine.Help.Ansi.Text[][] cellValues)

Copies the specified text values into the correct cells in the CommandLine.Help.TextTable. This implementation delegates to CommandLine.Help.TextTable.addRowValues(CommandLine.Help.Ansi.Text...) for each row of values.

Subclasses may override.

Parameters:

field - the field annotated with the specified Option or Parameters

cellValues - the text values representing the Option/Parameters, to be displayed in tabular form

addOptions

public void addOptions(List<Field> fields,
                       CommandLine.Help.IParamLabelRenderer paramLabelRenderer)

Calls addOption(Field, CommandLine.Help.IParamLabelRenderer) for all non-hidden Options in the list.

Parameters:

fields - fields annotated with CommandLine.Option to add usage descriptions for

paramLabelRenderer - object that knows how to render option parameters

addOption

public void addOption(Field field,
                      CommandLine.Help.IParamLabelRenderer paramLabelRenderer)

Delegates to the option renderer of this layout to obtain text values for the specified CommandLine.Option, and then calls the layout(Field, CommandLine.Help.Ansi.Text[][]) method to write these text values into the correct cells in the TextTable.

Parameters:

field - the field annotated with the specified Option

paramLabelRenderer - knows how to render option parameters

addPositionalParameters

public void addPositionalParameters(List<Field> fields,
                                    CommandLine.Help.IParamLabelRenderer paramLabelRenderer)

Calls addPositionalParameter(Field, CommandLine.Help.IParamLabelRenderer) for all non-hidden Parameters in the list.

Parameters:

fields - fields annotated with CommandLine.Parameters to add usage descriptions for

paramLabelRenderer - knows how to render option parameters

addPositionalParameter

public void addPositionalParameter(Field field,
                                   CommandLine.Help.IParamLabelRenderer paramLabelRenderer)

Delegates to the parameter renderer of this layout to obtain text values for the specified CommandLine.Parameters, and then calls layout(Field, CommandLine.Help.Ansi.Text[][]) to write these text values into the correct cells in the TextTable.

Parameters:

field - the field annotated with the specified Parameters

paramLabelRenderer - knows how to render option parameters

toString

public String toString()

Returns the section of the usage help message accumulated in the TextTable owned by this layout.

Overrides:

toString in class Object