org.antlr.mojo.antlr4

Class HelpMojo

java.lang.Object

org.apache.maven.plugin.AbstractMojo

org.antlr.mojo.antlr4.HelpMojo

All Implemented Interfaces:

org.apache.maven.plugin.ContextEnabled, org.apache.maven.plugin.Mojo

@Mojo(name="help",
      requiresProject=false,
      threadSafe=true)
public class HelpMojo
extends org.apache.maven.plugin.AbstractMojo

Display help information on antlr4-maven-plugin.
Call mvn antlr4:help -Ddetail=true -Dgoal=<goal-name> to display parameter details.

Field Summary

Fields

Modifier and Type	Field and Description
private static int	DEFAULT_LINE_LENGTH
private boolean	detail If true, display all settable properties for each goal.
private java.lang.String	goal The name of the goal for which to show help.
private int	indentSize The number of spaces per indentation level, should be positive.
private int	lineLength The maximum length of a display line, should be positive.
private static java.lang.String	PLUGIN_HELP_PATH

Fields inherited from interface org.apache.maven.plugin.Mojo

ROLE

Constructor Summary

Constructors

Constructor and Description
HelpMojo()

Method Summary

Modifier and Type	Method and Description
private void	append(java.lang.StringBuilder sb, java.lang.String description, int indent) Append a description to the buffer by respecting the indentSize and lineLength parameters.
private org.w3c.dom.Document	build()
void	execute()
private java.util.List<org.w3c.dom.Node>	findNamedChild(org.w3c.dom.Node node, java.lang.String elementName)
private org.w3c.dom.Node	findSingleChild(org.w3c.dom.Node node, java.lang.String elementName)
private static int	getIndentLevel(java.lang.String line) Gets the indentation level of the specified line.
private java.lang.String	getPropertyFromExpression(java.lang.String expression)
private org.w3c.dom.Node	getSingleChild(org.w3c.dom.Node node, java.lang.String elementName)
private java.lang.String	getValue(org.w3c.dom.Node node, java.lang.String elementName)
private static boolean	isNotEmpty(java.lang.String string)
private static java.lang.String	repeat(java.lang.String str, int repeat) Repeat a String n times to form a new string.
private static void	toLines(java.util.List<java.lang.String> lines, java.lang.String line, int indentSize, int lineLength) Adds the specified line to the output sequence, performing line wrapping if necessary.
private static java.util.List<java.lang.String>	toLines(java.lang.String text, int indent, int indentSize, int lineLength) Splits the specified text into lines of convenient display length.
private void	writeGoal(java.lang.StringBuilder sb, java.lang.String goalPrefix, org.w3c.dom.Element mojo)
private void	writeParameter(java.lang.StringBuilder sb, org.w3c.dom.Node parameter, org.w3c.dom.Node configurationElement)

Methods inherited from class org.apache.maven.plugin.AbstractMojo

getLog, getPluginContext, setLog, setPluginContext

Methods inherited from class java.lang.Object

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

Field Detail

detail

@Parameter(property="detail",
           defaultValue="false")
private boolean detail

If true, display all settable properties for each goal.

goal

@Parameter(property="goal")
private java.lang.String goal

The name of the goal for which to show help. If unspecified, all goals will be displayed.

lineLength

@Parameter(property="lineLength",
           defaultValue="80")
private int lineLength

The maximum length of a display line, should be positive.

indentSize

@Parameter(property="indentSize",
           defaultValue="2")
private int indentSize

The number of spaces per indentation level, should be positive.

PLUGIN_HELP_PATH

private static final java.lang.String PLUGIN_HELP_PATH

See Also:

Constant Field Values

DEFAULT_LINE_LENGTH

private static final int DEFAULT_LINE_LENGTH

See Also:

Constant Field Values

Constructor Detail

HelpMojo

public HelpMojo()

Method Detail

build

private org.w3c.dom.Document build()
                            throws org.apache.maven.plugin.MojoExecutionException

Throws:

org.apache.maven.plugin.MojoExecutionException

execute

public void execute()
             throws org.apache.maven.plugin.MojoExecutionException

Throws:

org.apache.maven.plugin.MojoExecutionException

isNotEmpty

private static boolean isNotEmpty(java.lang.String string)

getValue

private java.lang.String getValue(org.w3c.dom.Node node,
                                  java.lang.String elementName)
                           throws org.apache.maven.plugin.MojoExecutionException

Throws:

org.apache.maven.plugin.MojoExecutionException

getSingleChild

private org.w3c.dom.Node getSingleChild(org.w3c.dom.Node node,
                                        java.lang.String elementName)
                                 throws org.apache.maven.plugin.MojoExecutionException

Throws:

org.apache.maven.plugin.MojoExecutionException

findNamedChild

private java.util.List<org.w3c.dom.Node> findNamedChild(org.w3c.dom.Node node,
                                                        java.lang.String elementName)

findSingleChild

private org.w3c.dom.Node findSingleChild(org.w3c.dom.Node node,
                                         java.lang.String elementName)
                                  throws org.apache.maven.plugin.MojoExecutionException

Throws:

org.apache.maven.plugin.MojoExecutionException

writeGoal

private void writeGoal(java.lang.StringBuilder sb,
                       java.lang.String goalPrefix,
                       org.w3c.dom.Element mojo)
                throws org.apache.maven.plugin.MojoExecutionException

Throws:

org.apache.maven.plugin.MojoExecutionException

writeParameter

private void writeParameter(java.lang.StringBuilder sb,
                            org.w3c.dom.Node parameter,
                            org.w3c.dom.Node configurationElement)
                     throws org.apache.maven.plugin.MojoExecutionException

Throws:

org.apache.maven.plugin.MojoExecutionException

repeat

private static java.lang.String repeat(java.lang.String str,
                                       int repeat)

Repeat a String n times to form a new string.

Parameters:

str - String to repeat

repeat - number of times to repeat str

Returns:

String with repeated String

Throws:

java.lang.NegativeArraySizeException - if repeat < 0

java.lang.NullPointerException - if str is null

append

private void append(java.lang.StringBuilder sb,
                    java.lang.String description,
                    int indent)

Append a description to the buffer by respecting the indentSize and lineLength parameters. Note: The last character is always a new line.

Parameters:

sb - The buffer to append the description, not null.

description - The description, not null.

indent - The base indentation level of each line, must not be negative.

toLines

private static java.util.List<java.lang.String> toLines(java.lang.String text,
                                                        int indent,
                                                        int indentSize,
                                                        int lineLength)

Splits the specified text into lines of convenient display length.

Parameters:

text - The text to split into lines, must not be null.

indent - The base indentation level of each line, must not be negative.

indentSize - The size of each indentation, must not be negative.

lineLength - The length of the line, must not be negative.

Returns:

The sequence of display lines, never null.

Throws:

java.lang.NegativeArraySizeException - if indent < 0

toLines

private static void toLines(java.util.List<java.lang.String> lines,
                            java.lang.String line,
                            int indentSize,
                            int lineLength)

Adds the specified line to the output sequence, performing line wrapping if necessary.

Parameters:

lines - The sequence of display lines, must not be null.

line - The line to add, must not be null.

indentSize - The size of each indentation, must not be negative.

lineLength - The length of the line, must not be negative.

getIndentLevel

private static int getIndentLevel(java.lang.String line)

Gets the indentation level of the specified line.

Parameters:

line - The line whose indentation level should be retrieved, must not be null.

Returns:

The indentation level of the line.

getPropertyFromExpression

private java.lang.String getPropertyFromExpression(java.lang.String expression)