io.curly.bloodhound.query.QueryParser.java Source code

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Here is the source code for io.curly.bloodhound.query.QueryParser.java

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/*
 *        Copyright 2015 the original author or authors.
 *
 *    Licensed 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 io.curly.bloodhound.query;

import org.jetbrains.annotations.NotNull;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static io.curly.bloodhound.query.QueryUtils.*;
import static org.springframework.util.StringUtils.delimitedListToStringArray;

/**
 * @author Joo Evangelista
 */
final class QueryParser {

    private static final String REGEX_INNER_CURLY = "\\{(.*?)\\}";

    private static final String SPLIT_SPACES = "\\s+(?![^\\{]*\\})";

    private static final String SPLIT_SPACE_QUOTED = "([^\"]\\S*|\".+?\")\\s*";

    private static final String COMMA = ",";

    @NotNull
    static MultiValueMap<String, String> resolveMultiParameter(String query) {
        final MultiValueMap<String, String> multimap = new LinkedMultiValueMap<>();

        convertToMap(query).forEach((key, value) -> {
            if (value.contains(L_CURLY) && value.contains(R_CURLY)) {
                Matcher matcher = Pattern.compile(REGEX_INNER_CURLY).matcher(value);
                if (matcher.find()) {
                    String cleaned = cleanDelimiters(matcher.group());
                    if (cleaned.contains(COMMA)) {
                        multimap.put(key, getCommaDelimitedValue(cleaned));
                    } else {
                        multimap.put(key, getSpaceSplicedValue(cleaned));
                    }
                }
            } else {
                multimap.add(key, unquote(value));
            }
        });

        return multimap;
    }

    @NotNull
    private static Map<String, String> convertToMap(String query) {
        Map<String, String> kvMap = new HashMap<>(0);
        Arrays.asList(query.split(SPLIT_SPACES)).stream().forEach(item -> {
            String[] kv = item.split(":");
            if (kv.length == 2) {
                kvMap.put(kv[0].toLowerCase(), kv[1]);
            }
        });
        return kvMap;
    }

    private static List<String> getCommaDelimitedValue(String cleaned) {
        return trimElements(Arrays.asList(delimitedListToStringArray(unquote(cleaned), COMMA)));
    }

    private static List<String> getSpaceSplicedValue(String cleaned) {
        return trimElements(toUnquotedList(cleaned.split(SPLIT_SPACE_QUOTED)));
    }

    private static void transform(MultiValueMap<String, String> multimap, String key, String inner) {

    }

}