assertEquals(1, paramMap.size());
        assertEquals("1", paramMap.get("a")[0]);

        paramMap = filter.parseQueryString("a=1&b=2", "UTF-8");
        assertEquals(2, paramMap.size());
        assertEquals("1", paramMap.get("a")[0]);
        assertEquals("2", paramMap.get("b")[0]);

        paramMap = filter.parseQueryString("a=111&b=222&c=333", "UTF-8");

  </filter>

  <filter>
    <filter-name>webApiFilter</filter-name>
    <filter-class>org.codelibs.fess.filter.WebApiFilter</filter-class>
  </filter>

  <filter>
    <filter-name>lastaPrepareFilter</filter-name>
    <filter-class>org.lastaflute.web.servlet.filter.LastaPrepareFilter</filter-class>
  </filter>

  <filter>
    <filter-name>lastaShowbaseFilter</filter-name>

          "tokenizer": "standard",
          "filter": [
            "truncate20_filter",
            "lowercase",
            "arabic_stop",
            "arabic_normalization",
            "arabic_keywords",
            "arabic_override",
            "arabic_stemmer"
          ]
        },
        "armenian_analyzer": {
          "tokenizer":  "standard",
          "filter": [
            "truncate20_filter",

eg);transform:rotate(0deg)}to{-webkit-transform:rotate(1turn);transform:rotate(1turn)}}.fa-rotate-90{-ms-filter:"progid:DXImageTransform.Microsoft.BasicImage(rotation=1)";-webkit-transform:rotate(90deg);transform:rotate(90deg)}.fa-rotate-180{-ms-filter:"progid:DXImageTransform.Microsoft.BasicImage(rotation=2)";-webkit-transform:rotate(180deg);transform:rotate(180deg)}.fa-rotate-270{-ms-filter:"progid:DXImageTransform.Microsoft.BasicImage(rotation=3)";-webkit-transform:rotate(270deg);transform:ro...

        // TODO always returns empty list
        return split(getIndexAdminArrayFields(), ",").get(stream -> stream.filter(StringUtil::isNotBlank)
                .map(String::trim)
                .filter(s -> isNonEmptyValue(source.get(s)))
                .filter(s -> false) // TODO
                .collect(Collectors.toList()));
    }

    String getIndexAdminDateFields();

 */
package org.codelibs.fess.filter;

import java.io.IOException;
import java.util.Arrays;
import java.util.Set;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;

import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;

/**
 * Servlet filter for processing web API requests.
 * This filter intercepts HTTP requests and delegates processing to appropriate web API managers.
 */
public class WebApiFilter implements Filter {

    /**
     * Default constructor.
     */
    public WebApiFilter() {
        // Default constructor
    }

    /**
     * Initializes the web API filter.
     *

        }
    }

    // Test property filter returning null simulation
    @Test
    public void test_get_filterReturnsNull() {
        // The filter.null property is configured to simulate null filter behavior
        try {
            fessConfig.get("filter.null");
            fail("Should throw exception when property is not found");

    private int currentPageNumber;

    /** Search/filter parameter for duplicate host configuration ID. */
    public String id;

    /** Search/filter parameter for regular hostname pattern. */
    public String regularName;

    /** Search/filter parameter for duplicate hostname pattern. */
    public String duplicateHostName;

    /** Search/filter parameter for duplicate host sort order. */
    public String sortOrder;

        stream(conditions.get(SearchRequestParams.AS_OCCURRENCE))
                .of(stream -> stream.filter(this::isOccurrence).findFirst().ifPresent(q -> queryBuf.insert(0, q + ":")));

        stream(conditions.get(SearchRequestParams.AS_Q))
                .of(stream -> stream.filter(q -> StringUtil.isNotBlank(q) && q.length() <= maxQueryLength)
                        .forEach(q -> queryBuf.append(' ').append(q)));