org.apache.tools.ant.taskdefs
Class DependSet

java.lang.Object
  extended by org.apache.tools.ant.ProjectComponent
      extended by org.apache.tools.ant.Task
          extended by org.apache.tools.ant.taskdefs.MatchingTask
              extended by org.apache.tools.ant.taskdefs.DependSet
All Implemented Interfaces:
java.lang.Cloneable, SelectorContainer

public class DependSet
extends MatchingTask

Examines and removes out of date target files. If any of the target files are out of date with respect to any of the source files, all target files are removed. This is useful where dependencies cannot be computed (for example, dynamically interpreted parameters or files that need to stay in synch but are not directly linked) or where the ant task in question could compute them but does not (for example, the linked DTD for an XML file using the XSLT task). nested arguments:

At least one of both source and target entities is required.

This task will examine each of the sources against each of the target files. If any target files are out of date with respect to any of the sources, all targets are removed. If any sources or targets do not exist, all targets are removed. Hint: If missing files should be ignored, specify them as include patterns in filesets, rather than using filelists.

This task attempts to optimize speed of dependency checking by comparing only the dates of the oldest target file and the newest source.

Example uses:

Since:
Ant 1.4

Field Summary
 
Fields inherited from class org.apache.tools.ant.taskdefs.MatchingTask
fileset
 
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
DependSet()
           
 
Method Summary
 void addSrcfilelist(FileList fl)
          Add a list of source files.
 void addSrcfileset(FileSet fs)
          Add a set of source files.
 void addTargetfilelist(FileList fl)
          Add a list of target files.
 void addTargetfileset(FileSet fs)
          Add a set of target files.
 Union createSources()
          Create a nested sources element.
 Path createTargets()
          Create a nested targets element.
 void execute()
          Execute the task.
 
Methods inherited from class org.apache.tools.ant.taskdefs.MatchingTask
add, addAnd, addContains, addContainsRegexp, addCustom, addDate, addDepend, addDepth, addDifferent, addFilename, addMajority, addModified, addNone, addNot, addOr, addPresent, addSelector, addSize, addType, appendSelector, createExclude, createExcludesFile, createInclude, createIncludesFile, createPatternSet, getDirectoryScanner, getImplicitFileSet, getSelectors, hasSelectors, selectorCount, selectorElements, setCaseSensitive, setDefaultexcludes, setExcludes, setExcludesfile, setFollowSymlinks, setIncludes, setIncludesfile, setProject, XsetIgnore, XsetItems
 
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
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DependSet

public DependSet()
Method Detail

createSources

public Union createSources()
Create a nested sources element.

Returns:
a Union instance.

addSrcfileset

public void addSrcfileset(FileSet fs)
Add a set of source files.

Parameters:
fs - the FileSet to add.

addSrcfilelist

public void addSrcfilelist(FileList fl)
Add a list of source files.

Parameters:
fl - the FileList to add.

createTargets

public Path createTargets()
Create a nested targets element.

Returns:
a Union instance.

addTargetfileset

public void addTargetfileset(FileSet fs)
Add a set of target files.

Parameters:
fs - the FileSet to add.

addTargetfilelist

public void addTargetfilelist(FileList fl)
Add a list of target files.

Parameters:
fl - the FileList to add.

execute

public void execute()
             throws BuildException
Execute the task.

Overrides:
execute in class Task
Throws:
BuildException - if errors occur.