cn.imethan.common.mongodb.SearchFilter.java Source code

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Here is the source code for cn.imethan.common.mongodb.SearchFilter.java

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package cn.imethan.common.mongodb;

/*******************************************************************************
 * Copyright (c) 2005, 2014 springside.github.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *******************************************************************************/

import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.lang3.StringUtils;

import com.google.common.collect.Maps;

public class SearchFilter {

    public static String prefix = "search_";//??

    public enum Operator {
        EQ, NEQ, LIKE, GT, LT, GTE, LTE
    }

    public String fieldName;
    public Object value;
    public Operator operator;

    public SearchFilter(String fieldName, Operator operator, Object value) {
        this.fieldName = fieldName;
        this.value = value;
        this.operator = operator;
    }

    /**
     * ??
     * searchParamskey?OPERATOR_FIELDNAME
     * 
     * @param searchParams
     * @return
     *
     * @author Ethan Wong
     * @datetime 2015101?1:24:57
     */
    public static Map<String, SearchFilter> parse(Map<String, Object> searchParams) {
        Map<String, SearchFilter> filters = Maps.newHashMap();

        for (Entry<String, Object> entry : searchParams.entrySet()) {
            // 
            String key = entry.getKey();
            Object value = entry.getValue();
            if (StringUtils.isBlank((String) value)) {
                continue;
            }

            // operatorfiledAttribute
            String[] names = StringUtils.split(key, "_");
            if (names.length != 2) {
                throw new IllegalArgumentException(key + " is not a valid search filter name");
            }
            String filedName = names[1];
            Operator operator = Operator.valueOf(names[0]);

            // searchFilter
            SearchFilter filter = new SearchFilter(filedName, operator, value);
            filters.put(key, filter);
        }
        return filters;
    }
}