content: /**
   * 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 org.apache.solr.common.util.IteratorChain;
  
  /**
   * @version $Id$
   */
  public class DefaultSolrParams extends SolrParams {
    protected final SolrParams params;
    protected final SolrParams defaults;
  
    public DefaultSolrParams(SolrParams params, SolrParams defaults) {
      this.params = params;
      this.defaults = defaults;
    }
  
    @Override
    public String get(String param) {
      String val = params.get(param);
      return val!=null ? val : defaults.get(param);
    }
  
    @Override
    public String[] getParams(String param) {
      String[] vals = params.getParams(param);
      return vals!=null ? vals : defaults.getParams(param);
    }
  
    @Override
    public Iterator<String> getParameterNamesIterator() {
      final IteratorChain<String> c = new IteratorChain<String>();
      c.addIterator(defaults.getParameterNamesIterator());
      c.addIterator(params.getParameterNamesIterator());
      return c;
    }
  
    @Override
    public String toString() {
      return "{params("+params+"),defaults("+defaults+")}";
    }
  }
  