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A collection of various utility classes to ease working with strings, files, command lines, XML and more.
package org.codehaus.plexus.util;
/*
* Copyright The Codehaus Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.File;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
/**
* Scan a directory tree for files, with specified inclusions and exclusions.
*/
public abstract class AbstractScanner
implements Scanner
{
/**
* Patterns which should be excluded by default, like SCM files
*
* - Misc: **/*~, **/#*#, **/.#*, **/%*%, **/._*
* - CVS: **/CVS, **/CVS/**, **/.cvsignore
* - RCS: **/RCS, **/RCS/**
* - SCCS: **/SCCS, **/SCCS/**
* - VSSercer: **/vssver.scc
* - MKS: **/project.pj
* - SVN: **/.svn, **/.svn/**
* - GNU: **/.arch-ids, **/.arch-ids/**
* - Bazaar: **/.bzr, **/.bzr/**
* - SurroundSCM: **/.MySCMServerInfo
* - Mac: **/.DS_Store
* - Serena Dimension: **/.metadata, **/.metadata/**
* - Mercurial: **/.hg, **/.hg/**, **/.hgignore
* - GIT: **/.git, **/.gitignore, **/.gitattributes, **/.git/**
* - Bitkeeper: **/BitKeeper, **/BitKeeper/**, **/ChangeSet,
* **/ChangeSet/**
* - Darcs: **/_darcs, **/_darcs/**, **/.darcsrepo,
* **/.darcsrepo/****/-darcs-backup*, **/.darcs-temp-mail
*
*
* @see #addDefaultExcludes()
*/
public static final String[] DEFAULTEXCLUDES = {
// Miscellaneous typical temporary files
"**/*~", "**/#*#", "**/.#*", "**/%*%", "**/._*",
// CVS
"**/CVS", "**/CVS/**", "**/.cvsignore",
// RCS
"**/RCS", "**/RCS/**",
// SCCS
"**/SCCS", "**/SCCS/**",
// Visual SourceSafe
"**/vssver.scc",
// MKS
"**/project.pj",
// Subversion
"**/.svn", "**/.svn/**",
// Arch
"**/.arch-ids", "**/.arch-ids/**",
// Bazaar
"**/.bzr", "**/.bzr/**",
// SurroundSCM
"**/.MySCMServerInfo",
// Mac
"**/.DS_Store",
// Serena Dimensions Version 10
"**/.metadata", "**/.metadata/**",
// Mercurial
"**/.hg", "**/.hgignore", "**/.hg/**",
// git
"**/.git", "**/.gitignore", "**/.gitattributes", "**/.git/**",
// BitKeeper
"**/BitKeeper", "**/BitKeeper/**", "**/ChangeSet", "**/ChangeSet/**",
// darcs
"**/_darcs", "**/_darcs/**", "**/.darcsrepo", "**/.darcsrepo/**", "**/-darcs-backup*", "**/.darcs-temp-mail" };
/**
* The patterns for the files to be included.
*/
protected String[] includes;
private MatchPatterns includesPatterns;
/**
* The patterns for the files to be excluded.
*/
protected String[] excludes;
private MatchPatterns excludesPatterns;
/**
* Whether or not the file system should be treated as a case sensitive one.
*/
protected boolean isCaseSensitive = true;
/**
* @since 3.3.0
*/
protected Comparator filenameComparator;
/**
* Sets whether or not the file system should be regarded as case sensitive.
*
* @param isCaseSensitive whether or not the file system should be regarded as a case sensitive one
*/
public void setCaseSensitive( boolean isCaseSensitive )
{
this.isCaseSensitive = isCaseSensitive;
}
/**
* Tests whether or not a given path matches the start of a given pattern up to the first "**".
*
* This is not a general purpose test and should only be used if you can live with false positives. For example,
* pattern=**\a and str=b will yield true.
*
* @param pattern The pattern to match against. Must not be null.
* @param str The path to match, as a String. Must not be null.
* @return whether or not a given path matches the start of a given pattern up to the first "**".
*/
protected static boolean matchPatternStart( String pattern, String str )
{
return SelectorUtils.matchPatternStart( pattern, str );
}
/**
* Tests whether or not a given path matches the start of a given pattern up to the first "**".
*
* This is not a general purpose test and should only be used if you can live with false positives. For example,
* pattern=**\a and str=b will yield true.
*
* @param pattern The pattern to match against. Must not be null.
* @param str The path to match, as a String. Must not be null.
* @param isCaseSensitive Whether or not matching should be performed case sensitively.
* @return whether or not a given path matches the start of a given pattern up to the first "**".
*/
protected static boolean matchPatternStart( String pattern, String str, boolean isCaseSensitive )
{
return SelectorUtils.matchPatternStart( pattern, str, isCaseSensitive );
}
/**
* Tests whether or not a given path matches a given pattern.
*
* @param pattern The pattern to match against. Must not be null.
* @param str The path to match, as a String. Must not be null.
* @return true if the pattern matches against the string, or false otherwise.
*/
protected static boolean matchPath( String pattern, String str )
{
return SelectorUtils.matchPath( pattern, str );
}
/**
* Tests whether or not a given path matches a given pattern.
*
* @param pattern The pattern to match against. Must not be null.
* @param str The path to match, as a String. Must not be null.
* @param isCaseSensitive Whether or not matching should be performed case sensitively.
* @return true if the pattern matches against the string, or false otherwise.
*/
protected static boolean matchPath( String pattern, String str, boolean isCaseSensitive )
{
return SelectorUtils.matchPath( pattern, str, isCaseSensitive );
}
/**
* Tests whether or not a string matches against a pattern. The pattern may contain two special characters:
* '*' means zero or more characters
* '?' means one and only one character
*
* @param pattern The pattern to match against. Must not be null.
* @param str The string which must be matched against the pattern. Must not be null.
* @return true if the string matches against the pattern, or false otherwise.
*/
public static boolean match( String pattern, String str )
{
return SelectorUtils.match( pattern, str );
}
/**
* Tests whether or not a string matches against a pattern. The pattern may contain two special characters:
* '*' means zero or more characters
* '?' means one and only one character
*
* @param pattern The pattern to match against. Must not be null.
* @param str The string which must be matched against the pattern. Must not be null.
* @param isCaseSensitive Whether or not matching should be performed case sensitively.
* @return true if the string matches against the pattern, or false otherwise.
*/
protected static boolean match( String pattern, String str, boolean isCaseSensitive )
{
return SelectorUtils.match( pattern, str, isCaseSensitive );
}
/**
* Sets the list of include patterns to use. All '/' and '\' characters are replaced by
* File.separatorChar, so the separator used need not match File.separatorChar.
*
* When a pattern ends with a '/' or '\', "**" is appended.
*
* @param includes A list of include patterns. May be null, indicating that all files should be
* included. If a non-null list is given, all elements must be non-null.
*/
public void setIncludes( String[] includes )
{
if ( includes == null )
{
this.includes = null;
}
else
{
final List list = new ArrayList( includes.length );
for ( String include : includes )
{
if ( include != null )
{
list.add( normalizePattern( include ) );
}
}
this.includes = list.toArray( new String[list.size()] );
}
}
/**
* Sets the list of exclude patterns to use. All '/' and '\' characters are replaced by
* File.separatorChar, so the separator used need not match File.separatorChar.
*
* When a pattern ends with a '/' or '\', "**" is appended.
*
* @param excludes A list of exclude patterns. May be null, indicating that no files should be
* excluded. If a non-null list is given, all elements must be non-null.
*/
public void setExcludes( String[] excludes )
{
if ( excludes == null )
{
this.excludes = null;
}
else
{
final List list = new ArrayList( excludes.length );
for ( String exclude : excludes )
{
if ( exclude != null )
{
list.add( normalizePattern( exclude ) );
}
}
this.excludes = list.toArray( new String[list.size()] );
}
}
/**
* Normalizes the pattern, e.g. converts forward and backward slashes to the platform-specific file separator.
*
* @param pattern The pattern to normalize, must not be null.
* @return The normalized pattern, never null.
*/
private String normalizePattern( String pattern )
{
pattern = pattern.trim();
if ( pattern.startsWith( SelectorUtils.REGEX_HANDLER_PREFIX ) )
{
if ( File.separatorChar == '\\' )
{
pattern = StringUtils.replace( pattern, "/", "\\\\" );
}
else
{
pattern = StringUtils.replace( pattern, "\\\\", "/" );
}
}
else
{
pattern = pattern.replace( File.separatorChar == '/' ? '\\' : '/', File.separatorChar );
if ( pattern.endsWith( File.separator ) )
{
pattern += "**";
}
}
return pattern;
}
/**
* Tests whether or not a name matches against at least one include pattern.
*
* @param name The name to match. Must not be null.
* @return true when the name matches against at least one include pattern, or false
* otherwise.
*/
protected boolean isIncluded( String name )
{
return includesPatterns.matches( name, isCaseSensitive );
}
protected boolean isIncluded( String name, String[] tokenizedName )
{
return includesPatterns.matches( name, tokenizedName, isCaseSensitive );
}
/**
* Tests whether or not a name matches the start of at least one include pattern.
*
* @param name The name to match. Must not be null.
* @return true when the name matches against the start of at least one include pattern, or
* false otherwise.
*/
protected boolean couldHoldIncluded( String name )
{
return includesPatterns.matchesPatternStart( name, isCaseSensitive );
}
/**
* Tests whether or not a name matches against at least one exclude pattern.
*
* @param name The name to match. Must not be null.
* @return true when the name matches against at least one exclude pattern, or false
* otherwise.
*/
protected boolean isExcluded( String name )
{
return excludesPatterns.matches( name, isCaseSensitive );
}
protected boolean isExcluded( String name, String[] tokenizedName )
{
return excludesPatterns.matches( name, tokenizedName, isCaseSensitive );
}
/**
* Adds default exclusions to the current exclusions set.
*/
public void addDefaultExcludes()
{
int excludesLength = excludes == null ? 0 : excludes.length;
String[] newExcludes;
newExcludes = new String[excludesLength + DEFAULTEXCLUDES.length];
if ( excludesLength > 0 )
{
System.arraycopy( excludes, 0, newExcludes, 0, excludesLength );
}
for ( int i = 0; i < DEFAULTEXCLUDES.length; i++ )
{
newExcludes[i + excludesLength] = DEFAULTEXCLUDES[i].replace( '/', File.separatorChar );
}
excludes = newExcludes;
}
protected void setupDefaultFilters()
{
if ( includes == null )
{
// No includes supplied, so set it to 'matches all'
includes = new String[1];
includes[0] = "**";
}
if ( excludes == null )
{
excludes = new String[0];
}
}
protected void setupMatchPatterns()
{
includesPatterns = MatchPatterns.from( includes );
excludesPatterns = MatchPatterns.from( excludes );
}
@Override
public void setFilenameComparator( Comparator filenameComparator )
{
this.filenameComparator = filenameComparator;
}
}