org.apache.solr.common.params.DefaultSolrParams.java Source code

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Here is the source code for org.apache.solr.common.params.DefaultSolrParams.java

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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.common.params;

import java.util.Iterator;
import java.util.LinkedHashSet;

/**
 *
 */
public class DefaultSolrParams extends SolrParams {

    protected final SolrParams params;
    protected final SolrParams defaults;

    protected DefaultSolrParams(SolrParams params, SolrParams defaults) {
        assert params != null && defaults != null;
        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() {
        // We need to compute the set of all param names in advance 
        // So we don't wind up with an iterator that returns the same
        // String more then once (SOLR-6780)
        LinkedHashSet<String> allKeys = new LinkedHashSet<>();
        for (SolrParams p : new SolrParams[] { params, defaults }) {
            Iterator<String> localKeys = p.getParameterNamesIterator();
            while (localKeys.hasNext()) {
                allKeys.add(localKeys.next());
            }
        }
        return allKeys.iterator();
    }

    @Override
    public String toString() {
        return "{params(" + params + "),defaults(" + defaults + ")}";
    }
}