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com.logicbus.kvalue.xscript.list.KVLRem Maven / Gradle / Ivy

package com.logicbus.kvalue.xscript.list;

import java.util.Map;

import com.alogic.xscript.ExecuteWatcher;
import com.alogic.xscript.Logiclet;
import com.alogic.xscript.LogicletContext;
import com.logicbus.kvalue.xscript.KVRowOperation;
import com.anysoft.util.Properties;
import com.anysoft.util.PropertiesConstants;
import com.logicbus.kvalue.core.KeyValueRow;
import com.logicbus.kvalue.core.ListRow;

/**Redis Lrem 根据参数 COUNT 的值,移除列表中与参数 VALUE 相等的元素。
COUNT 的值可以是以下几种:
count > 0 : 从表头开始向表尾搜索,移除与 VALUE 相等的元素,数量为 COUNT 。
count < 0 : 从表尾开始向表头搜索,移除与 VALUE 相等的元素,数量为 COUNT 的绝对值。
count = 0 : 移除表中所有与 VALUE 相等的值
* @author zhongyi * */ public class KVLRem extends KVRowOperation{ protected String value = ""; /** * */ protected String count = "1"; public KVLRem(String tag, Logiclet p) { super(tag, p); } @Override public void configure(Properties p){ super.configure(p); value = PropertiesConstants.getRaw(p,"value",value); count = PropertiesConstants.getRaw(p,"count",count); } @Override protected void onExecute(KeyValueRow row, Map root, Map current, LogicletContext ctx, ExecuteWatcher watcher) { if (row instanceof ListRow) { ListRow r = (ListRow) row; ctx.SetValue(id, String.valueOf(r.remove(ctx.transform(value), getLong(ctx.transform(count),1)))); } } }




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