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/*******************************************************************************
* Copyright (c) 2009, 2019 Mountainminds GmbH & Co. KG and Contributors
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.runtime;
import java.util.regex.Pattern;
/**
* Matches strings against glob like wildcard expressions where <code>?</code>
* matches any single character and <code>*</code> matches any number of any
* character. Multiple expressions can be separated with a colon (:). In this
* case the expression matches if at least one part matches.
*/
public class WildcardMatcher {
private final Pattern pattern;
/**
* Creates a new matcher with the given expression.
*
* @param expression
* wildcard expressions
*/
public WildcardMatcher(final String expression) {
final String[] parts = expression.split("\\:");
final StringBuilder regex = new StringBuilder(expression.length() * 2);
boolean next = false;
for (final String part : parts) {
if (next) {
regex.append('|');
}
regex.append('(').append(toRegex(part)).append(')');
next = true;
}
pattern = Pattern.compile(regex.toString());
}
private static CharSequence toRegex(final String expression) {
final StringBuilder regex = new StringBuilder(expression.length() * 2);
for (final char c : expression.toCharArray()) {
switch (c) {
case '?':
regex.append(".");
break;
case '*':
regex.append(".*");
break;
default:
regex.append(Pattern.quote(String.valueOf(c)));
break;
}
}
return regex;
}
/**
* Matches the given string against the expressions of this matcher.
*
* @param s
* string to test
* @return <code>true</code>, if the expression matches
*/
public boolean matches(final String s) {
return pattern.matcher(s).matches();
}
}
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