LightPIT: src/main/java/de/uapcore/lightpit/PathPattern.java@88207b860cba (annotated)

src/main/java/de/uapcore/lightpit/PathPattern.java@88207b860cba (annotated)

src/main/java/de/uapcore/lightpit/PathPattern.java

Mon, 04 Jan 2021 17:30:10 +0100

author: Mike Becker <universe@uap-core.de>
date: Mon, 04 Jan 2021 17:30:10 +0100
changeset 178: 88207b860cba
parent 130: 7ef369744fd1
permissions: -rw-r--r--

automatically select version/component when creating new issues under active filters

 package de.uapcore.lightpit;
 import java.util.ArrayList;
 import java.util.List;
 public final class PathPattern {
     private final List<String> nodePatterns;
     private final boolean collection;
     /**
      * Constructs a new path pattern.
      * The special directories . and .. are disallowed in the pattern.
      *
      * @param pattern
      */
     public PathPattern(String pattern) {
         nodePatterns = parse(pattern);
         collection = pattern.endsWith("/");
     }
     private List<String> parse(String pattern) {
         var nodes = new ArrayList<String>();
         var parts = pattern.split("/");
         for (var part : parts) {
             if (part.isBlank()) continue;
             if (part.equals(".") || part.equals(".."))
                 throw new IllegalArgumentException("Path must not contain '.' or '..' nodes.");
             nodes.add(part);
         }
         return nodes;
     }
     /**
      * Matches a path against this pattern.
      * The path must be canonical in the sense that no . or .. parts occur.
      *
      * @param path the path to match
      * @return true if the path matches the pattern, false otherwise
      */
     public boolean matches(String path) {
         if (collection ^ path.endsWith("/"))
             return false;
         var nodes = parse(path);
         if (nodePatterns.size() != nodes.size())
             return false;
         for (int i = 0 ; i < nodePatterns.size() ; i++) {
             var pattern = nodePatterns.get(i);
             var node = nodes.get(i);
             if (pattern.startsWith("$"))
                 continue;
             if (!pattern.equals(node))
                 return false;
         }
         return true;
     }
     /**
      * Returns the path parameters found in the specified path using this pattern.
      * The return value of this method is undefined, if the patter does not match.
      *
      * @param path the path
      * @return the path parameters, if any, or an empty map
      * @see #matches(String)
      */
     public PathParameters obtainPathParameters(String path) {
         var params = new PathParameters();
         var nodes = parse(path);
         for (int i = 0 ; i < Math.min(nodes.size(), nodePatterns.size()) ; i++) {
             var pattern = nodePatterns.get(i);
             var node = nodes.get(i);
             if (pattern.startsWith("$")) {
                 params.put(pattern.substring(1), node);
             }
         }
         return params;
     }
     @Override
     public int hashCode() {
         var str = new StringBuilder();
         for (var node : nodePatterns) {
             if (node.startsWith("$")) {
                 str.append("/$");
             } else {
                 str.append('/');
                 str.append(node);
             }
         }
         if (collection)
             str.append('/');
         return str.toString().hashCode();
     }
     @Override
     public boolean equals(Object obj) {
         if (!obj.getClass().equals(PathPattern.class))
             return false;
         var other = (PathPattern) obj;
         if (collection ^ other.collection || nodePatterns.size() != other.nodePatterns.size())
             return false;
         for (int i = 0 ; i < nodePatterns.size() ; i++) {
             var left = nodePatterns.get(i);
             var right = other.nodePatterns.get(i);
             if (left.startsWith("$") && right.startsWith("$"))
                 continue;
             if (!left.equals(right))
                 return false;
         }
         return true;
     }
 }

Mercurial > hg > LightPIT / annotate

src/main/java/de/uapcore/lightpit/PathPattern.java@88207b860cba (annotated)

src/main/java/de/uapcore/lightpit/PathPattern.java