org.apache.tools.ant.taskdefs
Class DependSet

java.lang.Object
  org.apache.tools.ant.ProjectComponent
      org.apache.tools.ant.Task
          org.apache.tools.ant.taskdefs.MatchingTask
              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Examines and removes out of date target files. If any of the target files are out of date with respect to any of the source files, all target files are removed.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:

• sources (resource union describing the source resources to examine)
• srcfileset (fileset describing the source files to examine)
• srcfilelist (filelist describing the source files to examine)
• targets (path describing the target files to examine)
• targetfileset (fileset describing the target files to examine)
• targetfilelist (filelist describing the target files to examine)

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 If any target files are out of date with respect to any of the sources, all targets are removed.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:

• Record the fact that an XML file must be up to date with respect to its XSD (Schema file), even though the XML file itself includes no reference to its XSD.
• Record the fact that an XSL stylesheet includes other sub-stylesheets
• Record the fact that java files must be recompiled if the ant build file changes

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.