solr/solrj/src/java/org/apache/solr/common/params/MapSolrParams.java

/*
 * 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.common.params;

import java.util.Iterator;
import java.util.Map;

/**
 * {@link SolrParams} implementation that can be built from and is backed by a {@link Map}.
 */
public class MapSolrParams extends SolrParams {
  protected final Map<String,String> map;

  public MapSolrParams(Map<String,String> map) {
    assert map.entrySet().stream().allMatch(e -> {
      boolean hasStringKey = e.getKey() == null || e.getKey().getClass() == String.class;
      boolean hasStringValue = e.getValue() == null || e.getValue().getClass() == String.class;
      return hasStringKey && hasStringValue;
    });
    this.map = map;
  }

  @Override
  public String get(String name) {
      return map.get(name);
  }

  @Override
  public String[] getParams(String name) {
    String val = map.get(name);
    return val == null ? null : new String[] { val };
  }

  @Override
  public Iterator<String> getParameterNamesIterator() {
    return map.keySet().iterator();
  }

  public Map<String,String> getMap() { return map; }

}