1.1 --- a/src/main/java/de/uapcore/lightpit/PathPattern.java Mon Jan 04 17:30:10 2021 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,125 +0,0 @@
1.4 -package de.uapcore.lightpit;
1.5 -
1.6 -import java.util.ArrayList;
1.7 -import java.util.List;
1.8 -
1.9 -public final class PathPattern {
1.10 -
1.11 - private final List<String> nodePatterns;
1.12 - private final boolean collection;
1.13 -
1.14 - /**
1.15 - * Constructs a new path pattern.
1.16 - * The special directories . and .. are disallowed in the pattern.
1.17 - *
1.18 - * @param pattern
1.19 - */
1.20 - public PathPattern(String pattern) {
1.21 - nodePatterns = parse(pattern);
1.22 - collection = pattern.endsWith("/");
1.23 - }
1.24 -
1.25 - private List<String> parse(String pattern) {
1.26 -
1.27 - var nodes = new ArrayList<String>();
1.28 - var parts = pattern.split("/");
1.29 -
1.30 - for (var part : parts) {
1.31 - if (part.isBlank()) continue;
1.32 - if (part.equals(".") || part.equals(".."))
1.33 - throw new IllegalArgumentException("Path must not contain '.' or '..' nodes.");
1.34 - nodes.add(part);
1.35 - }
1.36 -
1.37 - return nodes;
1.38 - }
1.39 -
1.40 - /**
1.41 - * Matches a path against this pattern.
1.42 - * The path must be canonical in the sense that no . or .. parts occur.
1.43 - *
1.44 - * @param path the path to match
1.45 - * @return true if the path matches the pattern, false otherwise
1.46 - */
1.47 - public boolean matches(String path) {
1.48 - if (collection ^ path.endsWith("/"))
1.49 - return false;
1.50 -
1.51 - var nodes = parse(path);
1.52 - if (nodePatterns.size() != nodes.size())
1.53 - return false;
1.54 -
1.55 - for (int i = 0 ; i < nodePatterns.size() ; i++) {
1.56 - var pattern = nodePatterns.get(i);
1.57 - var node = nodes.get(i);
1.58 - if (pattern.startsWith("$"))
1.59 - continue;
1.60 - if (!pattern.equals(node))
1.61 - return false;
1.62 - }
1.63 -
1.64 - return true;
1.65 - }
1.66 -
1.67 - /**
1.68 - * Returns the path parameters found in the specified path using this pattern.
1.69 - * The return value of this method is undefined, if the patter does not match.
1.70 - *
1.71 - * @param path the path
1.72 - * @return the path parameters, if any, or an empty map
1.73 - * @see #matches(String)
1.74 - */
1.75 - public PathParameters obtainPathParameters(String path) {
1.76 - var params = new PathParameters();
1.77 -
1.78 - var nodes = parse(path);
1.79 -
1.80 - for (int i = 0 ; i < Math.min(nodes.size(), nodePatterns.size()) ; i++) {
1.81 - var pattern = nodePatterns.get(i);
1.82 - var node = nodes.get(i);
1.83 - if (pattern.startsWith("$")) {
1.84 - params.put(pattern.substring(1), node);
1.85 - }
1.86 - }
1.87 -
1.88 - return params;
1.89 - }
1.90 -
1.91 - @Override
1.92 - public int hashCode() {
1.93 - var str = new StringBuilder();
1.94 - for (var node : nodePatterns) {
1.95 - if (node.startsWith("$")) {
1.96 - str.append("/$");
1.97 - } else {
1.98 - str.append('/');
1.99 - str.append(node);
1.100 - }
1.101 - }
1.102 - if (collection)
1.103 - str.append('/');
1.104 -
1.105 - return str.toString().hashCode();
1.106 - }
1.107 -
1.108 - @Override
1.109 - public boolean equals(Object obj) {
1.110 - if (!obj.getClass().equals(PathPattern.class))
1.111 - return false;
1.112 -
1.113 - var other = (PathPattern) obj;
1.114 - if (collection ^ other.collection || nodePatterns.size() != other.nodePatterns.size())
1.115 - return false;
1.116 -
1.117 - for (int i = 0 ; i < nodePatterns.size() ; i++) {
1.118 - var left = nodePatterns.get(i);
1.119 - var right = other.nodePatterns.get(i);
1.120 - if (left.startsWith("$") && right.startsWith("$"))
1.121 - continue;
1.122 - if (!left.equals(right))
1.123 - return false;
1.124 - }
1.125 -
1.126 - return true;
1.127 - }
1.128 -}
