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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; } }




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