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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.alipay.lookout.core;

import com.alipay.lookout.api.Id;
import com.alipay.lookout.api.Tag;

import java.util.Collections;
import java.util.Map;

/**
 *  Id implementation for the no-op registry.
 *  because no api package access right, so define a noop2 instance.
 */
final class NoopId implements Id {
    /** Singleton instance. */
    static final Id INSTANCE = new NoopId();

    private NoopId() {
    }

    @Override
    public String name() {
        return "noop";
    }

    @Override
    public Iterable tags() {
        return Collections.emptyList();
    }

    @Override
    public Id withTag(String k, String v) {
        return this;
    }

    @Override
    public Id withTag(Tag tag) {
        return this;
    }

    @Override
    public Id withTags(Iterable tags) {
        return this;
    }

    @Override
    public Id withTags(Map tags) {
        return this;
    }

    @Override
    public String toString() {
        return name();
    }

    @Override
    public Id withTags(Tag... tags) {
        return this;
    }
}