com.github.javaclub.cdl.client.matrix.jdbc.ShardingValue Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of cdl-client Show documentation

Javaclub CDL

There is a newer version: 2.3.9


package com.github.javaclub.cdl.client.matrix.jdbc;

import java.util.Collection;
import java.util.Collections;

import lombok.AccessLevel;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.ToString;

import com.google.common.collect.Range;

/**
 * 分片值.
 * 
 * 
 * 目前支持{@code =, IN, BETWEEN};
 * 不支持{@code , >, <=, >=, LIKE, NOT, NOT IN}.
 * 
 * 
 */
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Getter
@ToString
public final class ShardingValue> {
    
    private final String columnName;
    
    private final T value;
    
    private final Collection values;
    
    private final Range valueRange;
    
    public ShardingValue(final String columnName, final T value) {
        this(columnName, value, Collections.emptyList(), null);
    }
    
    public ShardingValue(final String columnName, final Collection values) {
        this(columnName, null, values, null);
    }
    
    public ShardingValue(final String columnName, final Range valueRange) {
        this(columnName, null, Collections.emptyList(), valueRange);
    }
    
    /**
     * 获取分片值类型.
     * 
     * @return 分片值类型
     */
    public ShardingValueType getType() {
        if (null != value) {
            return ShardingValueType.SINGLE;
        }
        if (!values.isEmpty()) {
            return ShardingValueType.LIST;
        }
        return ShardingValueType.RANGE;
    }
    
    /**
     * 分片值类型.
     * 
     * @author zhangliang
     */
    public enum ShardingValueType {
        SINGLE, LIST, RANGE
    }
}