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

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Here is the source code for org.apache.solr.common.params.MultiMapSolrParams.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.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 *
 */
public class MultiMapSolrParams extends SolrParams {
    protected final Map<String, String[]> map;

    public static void addParam(String name, String val, Map<String, String[]> map) {
        String[] arr = map.get(name);
        if (arr == null) {
            arr = new String[] { val };
        } else {
            String[] newarr = new String[arr.length + 1];
            System.arraycopy(arr, 0, newarr, 0, arr.length);
            newarr[arr.length] = val;
            arr = newarr;
        }
        map.put(name, arr);
    }

    public static void addParam(String name, String[] vals, Map<String, String[]> map) {
        String[] arr = map.put(name, vals);
        if (arr == null) {
            return;
        }

        String[] newarr = new String[arr.length + vals.length];
        System.arraycopy(arr, 0, newarr, 0, arr.length);
        System.arraycopy(vals, 0, newarr, arr.length, vals.length);
        arr = newarr;

        map.put(name, arr);
    }

    public MultiMapSolrParams(Map<String, String[]> map) {
        this.map = map;
    }

    @Override
    public String get(String name) {
        String[] arr = map.get(name);
        return arr == null ? null : arr[0];
    }

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

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

    @Override
    public Iterator<Map.Entry<String, String[]>> iterator() {
        return map.entrySet().iterator();
    }

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

    /** Returns a MultiMap view of the SolrParams as efficiently as possible.  The returned map may or may not be a backing implementation. */
    public static Map<String, String[]> asMultiMap(SolrParams params) {
        return asMultiMap(params, false);
    }

    /** Returns a MultiMap view of the SolrParams.  A new map will be created if newCopy==true */
    public static Map<String, String[]> asMultiMap(SolrParams params, boolean newCopy) {
        if (params instanceof MultiMapSolrParams) {
            Map<String, String[]> map = ((MultiMapSolrParams) params).getMap();
            if (newCopy) {
                return new HashMap<>(map);
            }
            return map;
        } else if (params instanceof ModifiableSolrParams) {
            Map<String, String[]> map = ((ModifiableSolrParams) params).getMap();
            if (newCopy) {
                return new HashMap<>(map);
            }
            return map;
        } else {
            Map<String, String[]> map = new HashMap<>();
            for (Map.Entry<String, String[]> pair : params) {
                map.put(pair.getKey(), pair.getValue());
            }
            return map;
        }
    }

}