93 lines
3.0 KiB
Java
93 lines
3.0 KiB
Java
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package org.broadinstitute.sting.utils;
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import java.util.List;
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import java.util.ArrayList;
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import java.io.File;
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import java.io.FilenameFilter;
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/**
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* Created by IntelliJ IDEA.
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* User: hanna
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* Date: Mar 30, 2009
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* Time: 5:43:39 PM
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* To change this template use File | Settings | File Templates.
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*
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* A set of static utility methods for common operations on paths.
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*/
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public class PathUtils {
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/**
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* Constructor access disallowed...static utility methods only!
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*/
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private PathUtils() { }
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/**
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* Find the files in the given directory matching the given extension.
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*
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* @param basePath Path to search.
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* @param relativePrefix What directory should the given files be presented relative to?
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* @param extension Extension for which to search.
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* @param recursive Search recursively. Beware of symlinks!
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* @return A list of files matching the specified criteria.
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* TODO: Test recursive traversal in the presence of a symlink.
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*/
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public static List<String> findFilesInPath(final File basePath, final String relativePrefix, final String extension, boolean recursive) {
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List<String> filesInPath = new ArrayList<String>();
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FilenameFilter filter = new OrFilenameFilter(new DirectoryFilter(),
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new ExtensionFilter(extension));
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File[] contents = basePath.listFiles( filter );
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for (File content : contents) {
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String relativeFileName = relativePrefix.trim().length() != 0 ?
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relativePrefix + File.separator + content.getName() :
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content.getName();
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if (relativeFileName.endsWith(extension))
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filesInPath.add(relativeFileName);
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else if (content.isDirectory() && recursive)
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filesInPath.addAll(findFilesInPath(content, relativeFileName, extension, recursive));
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}
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return filesInPath;
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}
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/**
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* Filter files by extension.
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*/
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public static class ExtensionFilter implements FilenameFilter {
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private String extensionName = null;
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public ExtensionFilter(String extensionName) {
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this.extensionName = extensionName;
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}
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public boolean accept(File f, String s) {
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return s.endsWith("." + extensionName);
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}
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}
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/**
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* Filter directories from list of files.
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*/
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public static class DirectoryFilter implements FilenameFilter {
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public boolean accept(File f, String s) {
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return new File(f, s).isDirectory();
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}
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}
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/**
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* Join two FilenameFilters together in a logical 'or' operation.
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*/
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public static class OrFilenameFilter implements FilenameFilter {
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private FilenameFilter lhs = null, rhs = null;
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public OrFilenameFilter(FilenameFilter lhs, FilenameFilter rhs) {
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this.lhs = lhs;
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this.rhs = rhs;
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}
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public boolean accept(File f, String s) {
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return lhs.accept(f, s) || rhs.accept(f, s);
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}
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}
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}
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