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/*
* Copyright © 2017-2021 WireGuard LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.config;
import com.wireguard.util.NonNullForAll;
import java.util.Iterator;
import java.util.Optional;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@NonNullForAll
public final class Attribute {
private static final Pattern LINE_PATTERN = Pattern.compile("(\\w+)\\s*=\\s*([^\\s#][^#]*)");
private static final Pattern LIST_SEPARATOR = Pattern.compile("\\s*,\\s*");
private final String key;
private final String value;
private Attribute(final String key, final String value) {
this.key = key;
this.value = value;
}
public static String join(final Iterable<?> values) {
final Iterator<?> it = values.iterator();
if (!it.hasNext()) {
return "";
}
final StringBuilder sb = new StringBuilder();
sb.append(it.next());
while (it.hasNext()) {
sb.append(", ");
sb.append(it.next());
}
return sb.toString();
}
public static Optional<Attribute> parse(final CharSequence line) {
final Matcher matcher = LINE_PATTERN.matcher(line);
if (!matcher.matches())
return Optional.empty();
return Optional.of(new Attribute(matcher.group(1), matcher.group(2)));
}
public static String[] split(final CharSequence value) {
return LIST_SEPARATOR.split(value);
}
public String getKey() {
return key;
}
public String getValue() {
return value;
}
}
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