io.fabric8.docker.client.utils.DockerIgnorePathMatcher Maven / Gradle / Ivy
/*
* Copyright (C) 2016 Original Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package io.fabric8.docker.client.utils;
import java.nio.file.Path;
import java.nio.file.PathMatcher;
import java.util.Collection;
import java.util.StringTokenizer;
public class DockerIgnorePathMatcher implements PathMatcher {
private static final String NON_SEPARATOR_CHARS = "[^ /\\\\\\]\\]]";
private static final String STAR = "*";
private static final String QUESTION_MARK = "?";
private static final String END_BRACKET = "]";
private final String[] patterns;
public DockerIgnorePathMatcher(Collection patterns) {
this(patterns.toArray(new String[patterns.size()]));
}
public DockerIgnorePathMatcher(String... patterns) {
this.patterns = new String[patterns.length];
for (int i = 0; i < patterns.length; i++) {
this.patterns[i] = toRegex(patterns[i]);
}
}
@Override
public boolean matches(Path path) {
for (String p : patterns) {
if (path.toString().matches(p)) {
return true;
}
}
return false;
}
private static String toRegex(String pattern) {
return wildcardToRegex(wildcardToRegex(pattern, STAR, NON_SEPARATOR_CHARS), QUESTION_MARK, NON_SEPARATOR_CHARS);
}
private static String wildcardToRegex(String pattern, String wildcard, String regex) {
StringBuilder sb = new StringBuilder();
StringTokenizer tokenizer = new StringTokenizer(pattern, wildcard);
String lastToken = null;
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();
if (lastToken != null && lastToken.endsWith(END_BRACKET)) {
sb.append(token);
sb.append(wildcard);
} else if (tokenizer.hasMoreTokens() || pattern.endsWith(wildcard)) {
sb.append(token);
sb.append(regex);
sb.append(wildcard);
} else {
sb.append(token);
}
lastToken = token;
}
return sb.toString();
}
}