Length (Apache Ant API)
Date: 2008-06-27

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## org.apache.tools.ant.taskdefs
Class Length

    java.lang.Object
      org.apache.tools.ant.ProjectComponent
          org.apache.tools.ant.Task
              org.apache.tools.ant.taskdefs.Length

All Implemented Interfaces:
  java.lang.Cloneable, Condition

    public class Length

extends Task
implements Condition

Gets lengths: of files/resources, byte size; of strings, length (optionally trimmed). The task is overloaded in this way for semantic reasons, much like Available.

Since:
  Ant 1.6.3

Nested Class Summary
`static class` | `Length.FileMode` EnumeratedAttribute operation mode
`static class` | `Length.When` EnumeratedAttribute for the when attribute.

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
`Length()`

Method Summary
`void` | `add(FileSet fs)` Add a FileSet.
`void` | `add(ResourceCollection c)` Add a ResourceCollection.
`boolean` | `eval()` Fulfill the condition contract.
`void` | `execute()` Execute the length task.
`boolean` | `getTrim()` Learn whether strings will be trimmed.
`void` | `setFile(java.io.File file)` Set the single file for this task.
`void` | `setLength(long ell)` Set the target count number for use as a Condition.
`void` | `setMode(Length.FileMode m)` Set the execution mode for working with files.
`void` | `setProperty(java.lang.String property)` The property in which the length will be stored.
`void` | `setString(java.lang.String string)` Set the string whose length to get.
`void` | `setTrim(boolean trim)` Set whether to trim in string mode.
`void` | `setWhen(Comparison c)` Set the comparison for use as a Condition.
`void` | `setWhen(Length.When w)` Set the comparison for use as a Condition.

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

### Length

    public Length()

Method Detail

### setProperty

    public void setProperty(java.lang.String property)

  The property in which the length will be stored.

  Parameters:
    `property` - the `String` property key.

### setFile

    public void setFile(java.io.File file)

  Set the single file for this task.

  Parameters:
    `file` - the `File` whose length to retrieve.

### add

    public void add(FileSet fs)

  Add a FileSet.

  Parameters:
    `fs` - the `FileSet` to add.

### add

    public void add(ResourceCollection c)

  Add a ResourceCollection.

  Parameters:
    `c` - the `ResourceCollection` to add.
  Since:
    Ant 1.7

### setLength

    public void setLength(long ell)

  Set the target count number for use as a Condition.

  Parameters:
    `ell` - the long length to compare with.

### setWhen

    public void setWhen(Length.When w)

  Set the comparison for use as a Condition.

  Parameters:
    `w` - EnumeratedAttribute When.
  See Also:
    `Comparison`

### setWhen

    public void setWhen(Comparison c)

  Set the comparison for use as a Condition.

  Parameters:
    `c` - Comparison.
  Since:
    Ant 1.7
  See Also:
    `Comparison`

### setMode

    public void setMode(Length.FileMode m)

  Set the execution mode for working with files.

  Parameters:
    `m` - the `FileMode` to use.

### setString

    public void setString(java.lang.String string)

  Set the string whose length to get.

  Parameters:
    `string` - `String`.

### setTrim

    public void setTrim(boolean trim)

  Set whether to trim in string mode.

  Parameters:
    `trim` - `boolean`.

### getTrim

    public boolean getTrim()

  Learn whether strings will be trimmed.

  Returns:
    boolean trim setting.

### execute

    public void execute()

  Execute the length task.

  Overrides:
    `execute` in class `Task`

### eval

    public boolean eval()

  Fulfill the condition contract.

  Specified by:
    `eval` in interface `Condition`
  Returns:
    true if the condition is true.
  Throws:
    `BuildException` - if an error occurs.

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