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Apache Solr (module: core)
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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 org.apache.solr.handler.component;

import java.lang.reflect.Array;
import java.util.Collections;
import java.util.List;
import org.apache.solr.common.util.StrUtils;
import org.apache.solr.security.AllowListUrlChecker;

/** A replica source for solr stand alone mode */
class StandaloneReplicaSource implements ReplicaSource {
  private final List[] replicas;

  @SuppressWarnings("unchecked")
  public StandaloneReplicaSource(Builder builder) {
    List list = StrUtils.splitSmart(builder.shardsParam, ",", true);
    replicas = (List[]) Array.newInstance(List.class, list.size());
    for (int i = 0; i < list.size(); i++) {
      replicas[i] = StrUtils.splitSmart(list.get(i), "|", true);
      // todo do we really not need to transform in non-cloud mode?!
      // builder.replicaListTransformer.transform(replicas[i]);
      CloudReplicaSource.checkUrlsAllowList(
          builder.urlChecker, null, builder.shardsParam, replicas[i]);
    }
  }

  @Override
  public List getSliceNames() {
    // there are no logical slice names in non-cloud
    return Collections.emptyList();
  }

  @Override
  public int getSliceCount() {
    return replicas.length;
  }

  @Override
  public List getReplicasBySlice(int sliceNumber) {
    assert sliceNumber >= 0 && sliceNumber < replicas.length;
    return replicas[sliceNumber];
  }

  static class Builder {
    private String shardsParam;
    private AllowListUrlChecker urlChecker;

    public Builder shards(String shardsParam) {
      this.shardsParam = shardsParam;
      return this;
    }

    public Builder allowListUrlChecker(AllowListUrlChecker urlChecker) {
      this.urlChecker = urlChecker;
      return this;
    }

    public StandaloneReplicaSource build() {
      return new StandaloneReplicaSource(this);
    }
  }
}