Truncate (Apache Ant API)

Package org.apache.tools.ant.taskdefs

## Class Truncate

- java.lang.Object
- - org.apache.tools.ant.ProjectComponent
  - - org.apache.tools.ant.Task
    - - org.apache.tools.ant.taskdefs.Truncate

- All Implemented Interfaces:
    `java.lang.Cloneable`

      public class Truncate
      extends Task

  Set the length of one or more files, as the intermittently available `truncate` Unix utility/function.
  Since:
    Ant 1.7.1

- - ### Field Summary

    - ### Fields inherited from class org.apache.tools.ant.Task

      `target, taskName, taskType, wrapper`

    - ### Fields inherited from class org.apache.tools.ant.ProjectComponent

      `description, location, project`

  - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `Truncate()` |

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `add​(ResourceCollection rc)` | Add a nested (filesystem-only) ResourceCollection.
    `void` | `execute()` | Called by the project to let the task do its work.
    `void` | `setAdjust​(java.lang.Long adjust)` | Set the amount by which files' lengths should be adjusted.
    `void` | `setCreate​(boolean create)` | Set whether to create nonexistent files.
    `void` | `setFile​(java.io.File f)` | Set a single target File.
    `void` | `setLength​(java.lang.Long length)` | Set the length to which files should be set.
    `void` | `setMkdirs​(boolean mkdirs)` | Set whether, when creating nonexistent files, nonexistent directories should also be created.

    - ### Methods inherited from class org.apache.tools.ant.Task

      `bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, handleErrorFlush, handleErrorOutput, handleFlush, handleInput, handleOutput, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType`

    - ### Methods inherited from class org.apache.tools.ant.ProjectComponent

      `clone, getDescription, getLocation, getProject, setDescription, setLocation, setProject`

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

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

- - ### Constructor Detail

    - #### Truncate

          public Truncate()

  - ### Method Detail

    - #### setFile

          public void setFile​(java.io.File f)

      Set a single target File.
      Parameters:
        `f` - the single File

    - #### add

          public void add​(ResourceCollection rc)

      Add a nested (filesystem-only) ResourceCollection.
      Parameters:
        `rc` - the ResourceCollection to add.

    - #### setAdjust

          public void setAdjust​(java.lang.Long adjust)

      Set the amount by which files' lengths should be adjusted. It is permissible to append K / M / G / T / P.
      Parameters:
        `adjust` - (positive or negative) adjustment amount.

    - #### setLength

          public void setLength​(java.lang.Long length)

      Set the length to which files should be set. It is permissible to append K / M / G / T / P.
      Parameters:
        `length` - (positive) adjustment amount.

    - #### setCreate

          public void setCreate​(boolean create)

      Set whether to create nonexistent files.
      Parameters:
        `create` - boolean, default `true`.

    - #### setMkdirs

          public void setMkdirs​(boolean mkdirs)

      Set whether, when creating nonexistent files, nonexistent directories should also be created.
      Parameters:
        `mkdirs` - boolean, default `false`.

    - #### execute

          public void execute()

      Called by the project to let the task do its work. This method may be called more than once, if the task is invoked more than once. For example, if target1 and target2 both depend on target3, then running "ant target1 target2" will run all tasks in target3 twice..
      Overrides:
        `execute` in class `Task`