com.scudata.thread.GroupsJob Maven / Gradle / Ivy

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SPL(Structured Process Language) A programming language specially for structured data computing.

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package com.scudata.thread;

import com.scudata.dm.Context;
import com.scudata.dm.Sequence;
import com.scudata.dm.cursor.ICursor;
import com.scudata.dm.op.IGroupsResult;
import com.scudata.expression.Expression;

/**
 * ???α??????ִ?з????????????
 * @author WangXiaoJun
 *
 */
public class GroupsJob extends Job {
	private ICursor cursor; // ?????α?
	private Sequence seq; // ????????
	
	private Expression[] exps; // ?????ֶα???ʽ????
	private String[] names; // ?????ֶ???????
	private Expression[] calcExps; // ?????ֶα???ʽ????
	private String[] calcNames; // ?????ֶ???????
	private String opt; // ѡ??
	private Context ctx; // ??????????
	
	private IGroupsResult groupsResult; // ???????
	private int groupCount = -1; // @n??ʽ????ʱ?û????õĽ????????
	
	public GroupsJob(ICursor cursor, Expression[] exps, String[] names,
			Expression[] calcExps, String[] calcNames, String opt, Context ctx) {
		this.cursor = cursor;
		this.exps = exps;
		this.names = names;
		this.calcExps = calcExps;
		this.calcNames = calcNames;
		this.opt = opt;
		this.ctx = ctx;
	}
	
	public GroupsJob(Sequence seq, Expression[] exps, String[] names,
			Expression[] calcExps, String[] calcNames, String opt, Context ctx) {
		this.seq = seq;
		this.exps = exps;
		this.names = names;
		this.calcExps = calcExps;
		this.calcNames = calcNames;
		this.opt = opt;
		this.ctx = ctx;
	}
	
	/**
	 * ȡ???????
	 * @return IGroupsResult
	 */
	public IGroupsResult getGroupsResult() {
		return groupsResult;
	}
	
	/**
	 * @nѡ??ʹ?ã????õĽ????????
	 * @param groupCount
	 */
	public void setGroupCount(int groupCount) {
		this.groupCount = groupCount;
	}

	public void run() {
		if (cursor != null) {
			groupsResult = cursor.getGroupsResult(exps, names, calcExps, calcNames, opt, ctx);
		} else {
			groupsResult = seq.getGroupsResult(exps, names, calcExps, calcNames, opt, ctx);
		}
		
		if (groupCount > 1) {
			groupsResult.setGroupCount(groupCount);
		}
		
		if (seq == null) {
			groupsResult.push(cursor);
		} else {
			groupsResult.push(seq, ctx);
		}
	}
}