com.panforge.robotstxt.WildcardsCompiler Maven / Gradle / Ivy
/*
* Copyright 2016 Piotr Andzel.
*
* 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 com.panforge.robotstxt;
import java.util.regex.Pattern;
/**
* WildcardsCompiler patterns.
*/
class WildcardsCompiler {
/**
* Compiles wildcard pattern into a regular expression.
*
* Allowed wildcards:
*
* * - matches any sequence of characters
* $ - matches end of sequence
* @param patternWithWildcards pattern with wildcards
* @return compiled pattern
*/
public static Pattern compile(String patternWithWildcards) {
StringBuilder sb = new StringBuilder();
for (int i=0; i