org.clapper.util.io

Class MultipleRegexFilenameFilter

java.lang.Object

org.clapper.util.io.MultipleRegexFilenameFilter

All Implemented Interfaces:

java.io.FilenameFilter

public class MultipleRegexFilenameFilter
extends java.lang.Object
implements java.io.FilenameFilter

MultipleRegexFilenameFilter implements a java.io.FilenameFilter that matches file names and path names using one or more regular expressions. A MultipleRegexFilenameFilter contains two sets of regular expressions, an accept set and a reject set. To be accepted, a file name must not match any of the patterns in the reject set, and it must match at least one of the patterns in the accept set. If the reject set is empty, then no explicit rejections are done. However, if the accept set is empty, then all files are assumed to be accepted. (i.e., It's as if the accept set contained a single "^.*$" pattern.)

A MultipleRegexFilenameFilter can be configured to operate on just the simple file name, or on the file's path.

MultipleRegexFilenameFilter uses the java.util.regex regular expression classes, so it requires JDK 1.4 or newer.

See Also:

CombinationFilenameFilter, CombinationFileFilter

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MultipleRegexFilenameFilter.MatchType Match types

Constructor Summary

Constructors

Constructor and Description
MultipleRegexFilenameFilter(MultipleRegexFilenameFilter.MatchType matchType) Construct a new MultipleRegexFilenameFilter.

Method Summary

Modifier and Type	Method and Description
boolean	accept(java.io.File dir, java.lang.String name) Determine whether a file is to be accepted or not, based on the regular expressions in the reject and accept lists.
void	addAcceptPattern(java.lang.String pattern) Add an "accept" pattern to this filter.
void	addRejectPattern(java.lang.String pattern) Add an "accept" pattern to this filter.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MultipleRegexFilenameFilter

public MultipleRegexFilenameFilter(MultipleRegexFilenameFilter.MatchType matchType)

Construct a new MultipleRegexFilenameFilter.

Parameters:

matchType - MatchType.FILENAME to match just the filename, MatchType.PATH to match the path

Method Detail

addAcceptPattern

public void addAcceptPattern(java.lang.String pattern)
                      throws java.util.regex.PatternSyntaxException

Add an "accept" pattern to this filter. For a file to be accepted:

• it must not match one of the reject patterns, and
• either the accept pattern list must be empty, or the file name must match one of the accept patterns

Parameters:

pattern - the regular expression to add

Throws:

java.util.regex.PatternSyntaxException - bad regular expression

See Also:

addRejectPattern(java.lang.String)

addRejectPattern

public void addRejectPattern(java.lang.String pattern)
                      throws java.util.regex.PatternSyntaxException

Add an "accept" pattern to this filter. For a file to be accepted:

• it must not match one of the reject patterns, and
• either the accept pattern list must be empty, or the file name must match one of the accept patterns

Parameters:

pattern - the regular expression to add

Throws:

java.util.regex.PatternSyntaxException - bad regular expression

See Also:

addAcceptPattern(java.lang.String)

accept

public boolean accept(java.io.File dir,
                      java.lang.String name)

Determine whether a file is to be accepted or not, based on the regular expressions in the reject and accept lists.

Specified by:

accept in interface java.io.FilenameFilter

Parameters:

dir - The directory containing the file. Ignored if the match type is MatchType.FILENAME. Used to build the path to match when the match type is MatchType.PATH

name - the file name

Returns:

true if the file matches, false if it doesn't