ExtendedAntPathMatcher.java

package ac.simons.utils;

import java.util.Comparator;

/**
 * @author michael.simons, 2011-02-15
 */
public class ExtendedAntPathMatcher implements PathMatcher {
	private final AntPathMatcher delegate = new AntPathMatcher();

	@Override
	public boolean isPattern(String path) {
		return this.delegate.isPattern(path);
	}

	@Override
	public boolean match(String pattern, String path) {
		return this.delegate.match(pattern, path);
	}

	@Override
	public boolean matchStart(String pattern, String path) {
		return this.matchStart(pattern, path);
	}

	@Override
	public String extractPathWithinPattern(String pattern, String path) {
		return this.delegate.extractPathWithinPattern(pattern, path);
	}

	@Override
	public Map<String, String> extractUriTemplateVariables(String pattern, String path) {
		return this.delegate.extractUriTemplateVariables(pattern, path);
	}

	@Override
	public Comparator<String> getPatternComparator(final String path) {
		final Comparator<String> delegateComparator = this.delegate.getPatternComparator(path);
		
		return new Comparator<String>() {
			@Override
			public int compare(String pattern1, String pattern2) {
				int rv = 0;
				if(pattern1 == null && pattern2 == null)
					rv = 0;
				else if (pattern1 == null)
					rv = 1;
				else if (pattern2 == null)
					rv = -1;
				boolean pattern1EqualsPath = pattern1.equals(path);
				boolean pattern2EqualsPath = pattern2.equals(path);
				if (pattern1EqualsPath && pattern2EqualsPath)
					rv = 0;
				else if(pattern1EqualsPath)
					rv = -1;
				else if (pattern2EqualsPath)
					rv = 1;
				else {
					int sign = 1;
					String s1 = pattern1;
					String s2 = pattern2;
					if(s1.length() >= s2.length()) {
						sign = -1;
						s1 = pattern2;
						s2 = pattern1;
					}
					s1 = s1.replaceAll(Pattern.quote(".*")+"$", "");
					if(s2.startsWith(s1) && ".{format}".equals(s2.replaceAll(Pattern.quote(s1), "")))
						rv = sign*1;
					else
						rv = delegateComparator.compare(pattern1, pattern2);
				}
				return rv;
			}
		};
	}
	
	@Override
	public String combine(String pattern1, String pattern2) {
		return this.delegate.combine(pattern1, pattern2);
	}
}