io.opentelemetry.sdk.metrics.internal.view.StringPredicates Maven / Gradle / Ivy
/*
* Copyright The OpenTelemetry Authors
* SPDX-License-Identifier: Apache-2.0
*/
package io.opentelemetry.sdk.metrics.internal.view;
import java.util.function.Predicate;
import java.util.regex.Pattern;
/**
* Re-usable string predicates.
*
* This class is internal and is hence not for public use. Its APIs are unstable and can change
* at any time.
*/
public final class StringPredicates {
private StringPredicates() {}
/** A string predicate that matches all strings. */
public static final Predicate ALL = value -> true;
/** A string predicate that does exact string matching. */
public static Predicate exact(String match) {
return match::equals;
}
/** A string predicate that matches against a regular expression. */
public static Predicate regex(Pattern pattern) {
return input -> (input != null) && pattern.matcher(input).matches();
}
}