org.apache.tools.ant.types.selectors
Class DifferentSelector
java.lang.Object
   org.apache.tools.ant.ProjectComponent
org.apache.tools.ant.ProjectComponent
       org.apache.tools.ant.types.DataType
org.apache.tools.ant.types.DataType
           org.apache.tools.ant.types.selectors.BaseSelector
org.apache.tools.ant.types.selectors.BaseSelector
               org.apache.tools.ant.types.selectors.MappingSelector
org.apache.tools.ant.types.selectors.MappingSelector
                   org.apache.tools.ant.types.selectors.DifferentSelector
org.apache.tools.ant.types.selectors.DifferentSelector
- All Implemented Interfaces: 
- java.lang.Cloneable, FileSelector
- public class DifferentSelector 
- extends MappingSelector
This selector selects files against a mapped set of target files, selecting
 all those files which are different.
 Files with different lengths are deemed different
 automatically
 Files with identical timestamps are viewed as matching by
 default, unless you specify otherwise.
 Contents are compared if the lengths are the same
 and the timestamps are ignored or the same,
 except if you decide to ignore contents to gain speed.
 
 This is a useful selector to work with programs and tasks that don't handle
 dependency checking properly; Even if a predecessor task always creates its
 output files, followup tasks can be driven off copies made with a different
 selector, so their dependencies are driven on the absolute state of the
 files, not a timestamp.
 
 Clearly, however, bulk file comparisons is inefficient; anything that can
 use timestamps is to be preferred. If this selector must be used, use it
 over as few files as possible, perhaps following it with an <uptodate;>
 to keep the descendant routines conditional.
 
 
 
 
 
| Method Summary | 
| protected  boolean | selectionTest(java.io.File srcfile,
              java.io.File destfile)this test is our selection test that compared the file with the destfile
 | 
|  void | setIgnoreContents(boolean ignoreContents)This flag tells the selector to ignore contents
 | 
|  void | setIgnoreFileTimes(boolean ignoreFileTimes)This flag tells the selector to ignore file times in the comparison
 | 
 
 
 
| Methods inherited from class org.apache.tools.ant.types.DataType | 
| checkAttributesAllowed, checkChildrenAllowed, circularReference, clone, dieOnCircularReference, dieOnCircularReference, dieOnCircularReference, getCheckedRef, getCheckedRef, getCheckedRef, getCheckedRef, getDataTypeName, getRefid, invokeCircularReferenceCheck, isChecked, isReference, noChildrenAllowed, pushAndInvokeCircularReferenceCheck, setChecked, setRefid, tooManyAttributes, toString | 
 
 
| Methods inherited from class java.lang.Object | 
| equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait | 
 
DifferentSelector
public DifferentSelector()
setIgnoreFileTimes
public void setIgnoreFileTimes(boolean ignoreFileTimes)
- This flag tells the selector to ignore file times in the comparison
 
- 
- Parameters:
- ignoreFileTimes- if true ignore file times
 
setIgnoreContents
public void setIgnoreContents(boolean ignoreContents)
- This flag tells the selector to ignore contents
 
- 
- Parameters:
- ignoreContents- if true ignore contents
- Since:
- ant 1.6.3
 
selectionTest
protected boolean selectionTest(java.io.File srcfile,
                                java.io.File destfile)
- this test is our selection test that compared the file with the destfile
 
- 
- Specified by:
- selectionTestin class- MappingSelector
 
- 
- Parameters:
- srcfile- the source file
- destfile- the destination file
- Returns:
- true if the files are different