public final class SortFilter extends BaseParamFilterReader implements ChainableReader
Sort a file before and/or after the file.
Examples:
   <copy todir="build">
       <fileset dir="input" includes="*.txt"/>
       <filterchain>
           <sortfilter/>
       </filterchain>
   </copy>
 
 
 Sort all files *.txt from src location and copy
 them into build location. The lines of each file are sorted
 in ascendant order comparing the lines via the
 String.compareTo(Object o) method.
 
   <copy todir="build">
       <fileset dir="input" includes="*.txt"/>
       <filterchain>
           <sortfilter reverse="true"/>
       </filterchain>
   </copy>
 
 
 Sort all files *.txt from src location into reverse
 order and copy them into build location. If reverse parameter has
 value true (default value), then the output line of the files
 will be in ascendant order.
 
   <copy todir="build">
       <fileset dir="input" includes="*.txt"/>
       <filterchain>
           <filterreader classname="org.apache.tools.ant.filters.SortFilter">
             <param name="comparator" value="org.apache.tools.ant.filters.EvenFirstCmp"/>
           </filterreader>
       </filterchain>
   </copy>
 
 
 Sort all files *.txt from src location using as
 sorting criterion EvenFirstCmp class, that sorts the file
 lines putting even lines first then odd lines for example. The modified files
 are copied into build location. The EvenFirstCmp,
 has to an instantiable class via Class.newInstance(),
 therefore in case of inner class has to be static. It also has to
 implement java.util.Comparator interface, for example:
 
         package org.apache.tools.ant.filters;
         ...(omitted)
           public final class EvenFirstCmp implements <b>Comparator</b> {
             public int compare(Object o1, Object o2) {
             ...(omitted)
             }
           }
 
 The example above is equivalent to:
   <componentdef name="evenfirst"
                 classname="org.apache.tools.ant.filters.EvenFirstCmp"/>
   <copy todir="build">
       <fileset dir="input" includes="*.txt"/>
       <filterchain>
           <sortfilter>
               <evenfirst/>
           </sortfilter>
       </filterchain>
   </copy>
 
 If parameter comparator is present, then
 reverse parameter will not be taken into account.
| Constructor and Description | 
|---|
| SortFilter()Constructor for "dummy" instances. | 
| SortFilter(java.io.Reader in)Creates a new filtered reader. | 
| Modifier and Type | Method and Description | 
|---|---|
| void | add(java.util.Comparator<? super java.lang.String> comparator)Set the comparator to be used as sorting criterion as nested element. | 
| java.io.Reader | chain(java.io.Reader rdr)Creates a new SortReader using the passed in Reader for instantiation. | 
| java.util.Comparator<? super java.lang.String> | getComparator()Returns the comparator to be used for sorting. | 
| boolean | isReverse()Returns  trueif the sorting process will be in reverse
 order, otherwise the sorting process will be in ascendant order. | 
| int | read()Returns the next character in the filtered stream. | 
| void | setComparator(java.util.Comparator<? super java.lang.String> comparator)Set the comparator to be used as sorting criterion. | 
| void | setReverse(boolean reverse)Sets the sorting process will be in ascendant ( reverse=false)
 or to descendant (reverse=true). | 
getParameters, setParametersgetInitialized, getProject, read, readFully, readLine, setInitialized, setProject, skippublic SortFilter()
BaseFilterReader.BaseFilterReader()public SortFilter(java.io.Reader in)
in - A Reader object providing the underlying stream. Must not be
            null.public int read()
         throws java.io.IOException
read in class java.io.FilterReaderjava.io.IOException - if the underlying stream throws an IOException during
                readingpublic java.io.Reader chain(java.io.Reader rdr)
chain in interface ChainableReaderrdr - A Reader object providing the underlying stream. Must not be
            null.public boolean isReverse()
true if the sorting process will be in reverse
 order, otherwise the sorting process will be in ascendant order.true if the sorting process will be in reverse
         order, otherwise the sorting process will be in ascendant order.public void setReverse(boolean reverse)
reverse=false)
 or to descendant (reverse=true).reverse - Boolean representing reverse ordering process.public java.util.Comparator<? super java.lang.String> getComparator()
public void setComparator(java.util.Comparator<? super java.lang.String> comparator)
comparator - the comparator to setpublic void add(java.util.Comparator<? super java.lang.String> comparator)
comparator - the comparator to set