Package org.apache.tools.ant.types

# Class Commandline

java.lang.Object
org.apache.tools.ant.types.Commandline

All Implemented Interfaces:
  `Cloneable`

public class Commandline extends Object implements Cloneable
Commandline objects help handling command lines specifying processes to execute.

The class can be used to define a command line as nested elements or as a helper to define a command line by an application.

     <someelement>
       <acommandline executable="/executable/to/run">
         <argument value="argument 1"/>
         <argument line="argument_1 argument_2 argument_3"/>
         <argument value="argument 4"/>
       </acommandline>
     </someelement>

The element `someelement` must provide a method `createAcommandline` which returns an instance of this class.

## Nested Class Summary

Nested Classes
Modifier and Type
Class
Description
`static class`
`Commandline.Argument`
Used for nested xml command line definitions.
`class`
`Commandline.Marker`
Class to keep track of the position of an Argument.

## Field Summary

Fields
Modifier and Type
Field
Description
`protected static final String`
`DISCLAIMER`

## Constructor Summary

Constructors
Constructor
Description
`Commandline()`
Create an empty command line.
`Commandline(String toProcess)`
Create a command line from a string.

## Method Summary

Modifier and Type
Method
Description
`void`
`addArguments(String[] line)`
Append the arguments to the existing command.
`void`
`addArgumentsToList(ListIterator<String> list)`
Append all the arguments to the tail of a supplied list.
`void`
`addCommandToList(ListIterator<String> list)`
Add the entire command, including (optional) executable to a list.
`void`
`clear()`
Clear out the whole command line.
`void`
`clearArgs()`
Clear out the arguments but leave the executable in place for another operation.
`Object`
`clone()`
Generate a deep clone of the contained object.
`Commandline.Argument`
`createArgument()`
Create an argument object.
`Commandline.Argument`
`createArgument(boolean insertAtStart)`
Create an argument object and add it to our list of args.
`Commandline.Marker`
`createMarker()`
Return a marker.
`String`
`describeArguments()`
Return a String that describes the arguments suitable for verbose output before a call to `Runtime.exec(String[])`.
`static String`
`describeArguments(String[] args)`
Return a String that describes the arguments suitable for verbose output before a call to `Runtime.exec(String[])`.
`protected static String`
`describeArguments(String[] args, int offset)`
Return a String that describes the arguments suitable for verbose output before a call to `Runtime.exec(String[])`.
`static String`
`describeArguments(Commandline line)`
Return a String that describes the arguments suitable for verbose output before a call to `Runtime.exec(String[])`.
`String`
`describeCommand()`
Return a String that describes the command and arguments suitable for verbose output before a call to `Runtime.exec(String[])`.
`static String`
`describeCommand(String[] args)`
Return a String that describes the command and arguments suitable for verbose output before a call to `Runtime.exec(String[])`.
`static String`
`describeCommand(Commandline line)`
Return a String that describes the command and arguments suitable for verbose output before a call to `Runtime.exec(String[])`.
`String[]`
`getArguments()`
Returns all arguments defined by `addLine`, `addValue` or the argument object.
`String[]`
`getCommandline()`
Return the executable and all defined arguments.
`String`
`getExecutable()`
Get the executable.
`Iterator<Commandline.Argument>`
`iterator()`
Get an iterator to the arguments list.
`static String`
`quoteArgument(String argument)`
Put quotes around the given String if necessary.
`void`
`setExecutable(String executable)`
Set the executable to run.
`void`
`setExecutable(String executable, boolean translateFileSeparator)`
Set the executable to run.
`int`
`size()`
Size operator.
`String`
`toString()`
Return the command line as a string.
`static String`
`toString(String[] line)`
Quote the parts of the given array in way that makes them usable as command line arguments.
`static String[]`
`translateCommandline(String toProcess)`
Crack a command line.

### Methods inherited from class java.lang.Object

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

## Field Details

### DISCLAIMER

protected static final String DISCLAIMER

## Constructor Details

### Commandline

public Commandline(String toProcess)
Create a command line from a string.

Parameters:
  `toProcess` - the line: the first element becomes the executable, the rest the arguments.

### Commandline

public Commandline()
Create an empty command line.

## Method Details

### createArgument

public Commandline.Argument createArgument()
Create an argument object.

Each commandline object has at most one instance of the argument class. This method calls `this.createArgument(false)`.

Returns:
  the argument object.
See Also:
  - `createArgument(boolean)`

### createArgument

public Commandline.Argument createArgument(boolean insertAtStart)
Create an argument object and add it to our list of args.

Each commandline object has at most one instance of the argument class.

Parameters:
  `insertAtStart` - if true, the argument is inserted at the beginning of the list of args, otherwise it is appended.
Returns:
  an argument to be configured

### setExecutable

public void setExecutable(String executable)
Set the executable to run. All file separators in the string are converted to the platform specific value.

Parameters:
  `executable` - the String executable name.

### setExecutable

public void setExecutable(String executable, boolean translateFileSeparator)
Set the executable to run.

Parameters:
  `executable` - the String executable name.
  `translateFileSeparator` - if `true` all file separators in the string are converted to the platform specific value.
Since:
  Ant 1.9.7

### getExecutable

public String getExecutable()
Get the executable.

Returns:
  the program to run--null if not yet set.

### addArguments

public void addArguments(String[] line)
Append the arguments to the existing command.

Parameters:
  `line` - an array of arguments to append.

### getCommandline

public String[] getCommandline()
Return the executable and all defined arguments.

Returns:
  the commandline as an array of strings.

### addCommandToList

public void addCommandToList(ListIterator<String> list)
Add the entire command, including (optional) executable to a list.

Parameters:
  `list` - the list to add to.
Since:
  Ant 1.6

### getArguments

public String[] getArguments()
Returns all arguments defined by `addLine`, `addValue` or the argument object.

Returns:
  the arguments as an array of strings.

### addArgumentsToList

public void addArgumentsToList(ListIterator<String> list)
Append all the arguments to the tail of a supplied list.

Parameters:
  `list` - the list of arguments.
Since:
  Ant 1.6

### toString

public String toString()
Return the command line as a string.

Overrides:
  `toString` in class `Object`
Returns:
  the command line.

### quoteArgument

public static String quoteArgument(String argument)
Put quotes around the given String if necessary.

If the argument doesn't include spaces or quotes, return it as is. If it contains double quotes, use single quotes - else surround the argument by double quotes.

Parameters:
  `argument` - the argument to quote if necessary.
Returns:
  the quoted argument.
Throws:
  `BuildException` - if the argument contains both, single and double quotes.

### toString

public static String toString(String[] line)
Quote the parts of the given array in way that makes them usable as command line arguments.

Parameters:
  `line` - the list of arguments to quote.
Returns:
  empty string for null or no command, else every argument split by spaces and quoted by quoting rules.

### translateCommandline

public static String[] translateCommandline(String toProcess)
Crack a command line.

Parameters:
  `toProcess` - the command line to process.
Returns:
  the command line broken into strings. An empty or null toProcess parameter results in a zero sized array.

### size

public int size()
Size operator. This actually creates the command line, so it is not a zero cost operation.

Returns:
  number of elements in the command, including the executable.

### clone

public Object clone()
Generate a deep clone of the contained object.

Overrides:
  `clone` in class `Object`
Returns:
  a clone of the contained object

### clear

public void clear()
Clear out the whole command line.

### clearArgs

public void clearArgs()
Clear out the arguments but leave the executable in place for another operation.

### createMarker

public Commandline.Marker createMarker()
Return a marker.

This marker can be used to locate a position on the commandline--to insert something for example--when all parameters have been set.

Returns:
  a marker

### describeCommand

public String describeCommand()
Return a String that describes the command and arguments suitable for verbose output before a call to `Runtime.exec(String[])`.

Returns:
  a string that describes the command and arguments.
Since:
  Ant 1.5

### describeArguments

public String describeArguments()
Return a String that describes the arguments suitable for verbose output before a call to `Runtime.exec(String[])`.

Returns:
  a string that describes the arguments.
Since:
  Ant 1.5

### describeCommand

public static String describeCommand(Commandline line)
Return a String that describes the command and arguments suitable for verbose output before a call to `Runtime.exec(String[])`.

Parameters:
  `line` - the Commandline to describe.
Returns:
  a string that describes the command and arguments.
Since:
  Ant 1.5

### describeArguments

public static String describeArguments(Commandline line)
Return a String that describes the arguments suitable for verbose output before a call to `Runtime.exec(String[])`.

Parameters:
  `line` - the Commandline whose arguments to describe.
Returns:
  a string that describes the arguments.
Since:
  Ant 1.5

### describeCommand

public static String describeCommand(String[] args)
Return a String that describes the command and arguments suitable for verbose output before a call to `Runtime.exec(String[])`.

This method assumes that the first entry in the array is the executable to run.

Parameters:
  `args` - the command line to describe as an array of strings
Returns:
  a string that describes the command and arguments.
Since:
  Ant 1.5

### describeArguments

public static String describeArguments(String[] args)
Return a String that describes the arguments suitable for verbose output before a call to `Runtime.exec(String[])`.

Parameters:
  `args` - the command line to describe as an array of strings.
Returns:
  a string that describes the arguments.
Since:
  Ant 1.5

### describeArguments

protected static String describeArguments(String[] args, int offset)
Return a String that describes the arguments suitable for verbose output before a call to `Runtime.exec(String[])`.

Parameters:
  `args` - the command line to describe as an array of strings.
  `offset` - ignore entries before this index.
Returns:
  a string that describes the arguments
Since:
  Ant 1.5

### iterator

public Iterator<Commandline.Argument> iterator()
Get an iterator to the arguments list.

Returns:
  an Iterator.
Since:
  Ant 1.7