UpToDate (Apache Ant API)
Date: 2015-06-29

org.apache.tools.ant.taskdefs

## Class UpToDate

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

- All Implemented Interfaces:
    java.lang.Cloneable, Condition

      public class UpToDate
      extends Task
      implements Condition

  Sets the given property if the specified target has a timestamp greater than all of the source files.
  Since:
    Ant 1.2

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected Mapper` | `mapperElement`

    - ### 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 and Description
    `UpToDate()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `add(FileNameMapper fileNameMapper)` A nested filenamemapper
    `void` | `addSrcfiles(FileSet fs)` Nested <srcfiles> element.
    `Mapper` | `createMapper()` Defines the FileNameMapper to use (nested mapper element).
    `Union` | `createSrcResources()` Nested resource collections as sources.
    `boolean` | `eval()` Evaluate (all) target and source file(s) to see if the target(s) is/are up-to-date.
    `void` | `execute()` Sets property to true if target file(s) have a more recent timestamp than (each of) the corresponding source file(s).
    `protected boolean` | `scanDir(java.io.File srcDir, java.lang.String[] files)` Scan a directory for files to check for "up to date"ness
    `void` | `setProperty(java.lang.String property)` The property to set if the target file is more up-to-date than (each of) the source file(s).
    `void` | `setSrcfile(java.io.File file)` The file that must be older than the target file if the property is to be set.
    `void` | `setTargetFile(java.io.File file)` The file which must be more up-to-date than (each of) the source file(s) if the property is to be set.
    `void` | `setValue(java.lang.String value)` The value to set the named property to if the target file is more up-to-date than (each of) the source file(s).

    - ### 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`

- - ### Field Detail

    - #### mapperElement

          protected Mapper mapperElement

  - ### Constructor Detail

    - #### UpToDate

          public UpToDate()

  - ### Method Detail

    - #### setProperty

          public void setProperty(java.lang.String property)

      The property to set if the target file is more up-to-date than (each of) the source file(s).
      Parameters:
        `property` - the name of the property to set if Target is up-to-date.

    - #### setValue

          public void setValue(java.lang.String value)

      The value to set the named property to if the target file is more up-to-date than (each of) the source file(s). Defaults to 'true'.
      Parameters:
        `value` - the value to set the property to if Target is up-to-date

    - #### setTargetFile

          public void setTargetFile(java.io.File file)

      The file which must be more up-to-date than (each of) the source file(s) if the property is to be set.
      Parameters:
        `file` - the file we are checking against.

    - #### setSrcfile

          public void setSrcfile(java.io.File file)

      The file that must be older than the target file if the property is to be set.
      Parameters:
        `file` - the file we are checking against the target file.

    - #### addSrcfiles

          public void addSrcfiles(FileSet fs)

      Nested <srcfiles> element.
      Parameters:
        `fs` - the source files

    - #### createSrcResources

          public Union createSrcResources()

      Nested resource collections as sources.
      Returns:
        the source resources to configure.
      Since:
        Ant 1.7

    - #### createMapper

          public Mapper createMapper()
                              throws BuildException

      Defines the FileNameMapper to use (nested mapper element).
      Returns:
        a mapper to be configured
      Throws:
        `BuildException` - if more than one mapper is defined

    - #### add

          public void add(FileNameMapper fileNameMapper)

      A nested filenamemapper
      Parameters:
        `fileNameMapper` - the mapper to add
      Since:
        Ant 1.6.3

    - #### eval

          public boolean eval()

      Evaluate (all) target and source file(s) to see if the target(s) is/are up-to-date.
      Specified by:
        `eval` in interface `Condition`
      Returns:
        true if the target(s) is/are up-to-date

    - #### execute

          public void execute()
                       throws BuildException

      Sets property to true if target file(s) have a more recent timestamp than (each of) the corresponding source file(s).
      Overrides:
        `execute` in class `Task`
      Throws:
        `BuildException` - on error

    - #### scanDir

          protected boolean scanDir(java.io.File srcDir,
                        java.lang.String[] files)

      Scan a directory for files to check for "up to date"ness
      Parameters:
        `srcDir` - the directory
        `files` - the files to scan for
      Returns:
        true if the files are up to date