001package org.avaje.classpath.scanner;
002
003import java.io.File;
004
005/**
006 * Some common resource matching predicates.
007 */
008public class FilterResource {
009
010  /**
011   * Return a resource matcher that matches by both prefix and suffix.
012   */
013  public static ResourceFilter byPrefixSuffix(String prefix, String suffix) {
014    return new ByPrefixSuffix(prefix, suffix);
015  }
016
017  /**
018   * Return a resource matcher that matches by suffix.
019   */
020  public static ResourceFilter bySuffix(String suffix) {
021    return new BySuffix(suffix);
022  }
023
024  /**
025   * Return a resource matcher that matches by prefix.
026   */
027  public static ResourceFilter byPrefix(String prefix) {
028    return new ByPrefix(prefix);
029  }
030
031  private FilterResource() {
032  }
033
034  private static class ByPrefixSuffix implements ResourceFilter {
035
036    private final String prefix;
037    private final String suffix;
038
039    ByPrefixSuffix(String prefix, String suffix) {
040      this.prefix = prefix;
041      this.suffix = suffix;
042    }
043
044    @Override
045    public boolean isMatch(String resourceName) {
046      // resources always use '/' as separator
047      String fileName = resourceName.substring(resourceName.lastIndexOf('/') + 1);
048      return fileName.startsWith(prefix) && fileName.endsWith(suffix);
049    }
050  }
051
052  private static class BySuffix implements ResourceFilter {
053
054    private final String suffix;
055
056    BySuffix(String suffix) {
057      this.suffix = suffix;
058    }
059
060    @Override
061    public boolean isMatch(String resourceName) {
062      return resourceName.endsWith(suffix);
063    }
064  }
065
066  private static class ByPrefix implements ResourceFilter {
067
068    private final String prefix;
069
070    ByPrefix(String prefix) {
071      this.prefix = prefix;
072    }
073
074    @Override
075    public boolean isMatch(String resourceName) {
076      return resourceName.startsWith(prefix);
077    }
078  }
079}