io.micrometer.core.instrument.ImmutableTag Maven / Gradle / Ivy
/*
* Copyright 2017 VMware, Inc.
*
* 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
*
* https://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.micrometer.core.instrument;
import io.micrometer.core.lang.Nullable;
import java.util.Objects;
import static java.util.Objects.requireNonNull;
/**
* Immutable {@link Tag}.
*
* @author Jon Schneider
*/
public class ImmutableTag implements Tag {
private final String key;
private final String value;
public ImmutableTag(String key, String value) {
requireNonNull(key);
requireNonNull(value);
this.key = key;
this.value = value;
}
@Override
public String getKey() {
return key;
}
@Override
public String getValue() {
return value;
}
@Override
public boolean equals(@Nullable Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
Tag that = (Tag) o;
return Objects.equals(key, that.getKey()) && Objects.equals(value, that.getValue());
}
@Override
public int hashCode() {
int result = key.hashCode();
result = 31 * result + value.hashCode();
return result;
}
@Override
public String toString() {
return "tag(" + key + "=" + value + ")";
}
}