com.scudata.ide.spl.etl.element.CsGroups 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.ide.spl.etl.element;
import java.util.StringTokenizer;

import com.scudata.chart.Consts;
import com.scudata.common.StringUtils;
import com.scudata.ide.spl.etl.EtlConsts;
import com.scudata.ide.spl.etl.ParamInfo;
import com.scudata.ide.spl.etl.ParamInfoList;

/**
 * ?????????༭ CS.groups()
 * ??????ǰ׺Cs??ʾ?α?
 * 
 * @author Joancy
 *
 */
public class CsGroups extends AGroups {
	public String maxN;
	
	/**
	 * ??ȡ???ڽ???༭?Ĳ?????Ϣ?б?
	 */
	public ParamInfoList getParamInfoList() {
		ParamInfoList paramInfos = new ParamInfoList();
		ParamInfo.setCurrent(AGroups.class, this);
		paramInfos.add(new ParamInfo("groupExps",EtlConsts.INPUT_FIELDDEFINE_EXP_FIELD));
		paramInfos.add(new ParamInfo("aggregateExps",EtlConsts.INPUT_FIELDDEFINE_EXP_FIELD));
		ParamInfo.setCurrent(CsGroups.class, this);
		paramInfos.add(new ParamInfo("maxN"));
		
		ParamInfo.setCurrent(AGroups.class, this);
		String group = "options";
		paramInfos.add(group, new ParamInfo("o", Consts.INPUT_CHECKBOX));
		paramInfos.add(group, new ParamInfo("n", Consts.INPUT_CHECKBOX));
		paramInfos.add(group, new ParamInfo("u", Consts.INPUT_CHECKBOX));
		paramInfos.add(group, new ParamInfo("i", Consts.INPUT_CHECKBOX));
		paramInfos.add(group, new ParamInfo("h", Consts.INPUT_CHECKBOX));

		return paramInfos;
	}

	/**
	 * ??ȡ??????
	 * ???͵ĳ???????Ϊ
	 * EtlConsts.TYPE_XXX
	 * @return EtlConsts.TYPE_CURSOR
	 */
	public byte getParentType() {
		return EtlConsts.TYPE_CURSOR;
	}

	/**
	 * ??ȡ?ú????ķ???????
	 * @return EtlConsts.TYPE_SEQUENCE
	 */
	public byte getReturnType() {
		return EtlConsts.TYPE_SEQUENCE;
	}

	/**
	 * ??ȡ????????SPL????ʽ??ѡ?
	 */
	public String optionString(){
		StringBuffer options = new StringBuffer();
		if(o){
			options.append("o");
		}
		if(n){
			options.append("n");
		}
		if(u && !n){//u,n????
			options.append("u");
		}
		if(i){
			options.append("i");
		}
		if(h){
			options.append("h");
		}
		return options.toString();
	}
	
	/**
	 * ??ȡ????????SPL????ʽ?ĺ?????
	 * ??setFuncBody???溯????Ȼ?????ʽ?ĸ?ֵҲ???ǻ????
	 */
	public String getFuncBody() {
		StringBuffer sb = new StringBuffer();
		sb.append( getFieldDefineExp(groupExps) );
		String aggregates = getFieldDefineExp(aggregateExps);
		if(!aggregates.isEmpty()){
			sb.append(";");
			sb.append(aggregates);
		}
		if(StringUtils.isValidString(maxN)){
			sb.append(";");
			sb.append(getExpressionExp(maxN));
		}
		
		return sb.toString();
	}

	/**
	 * ???ú?????
	 * @param funcBody ??????
	 */
	public boolean setFuncBody(String funcBody) {
		StringTokenizer st = new StringTokenizer(funcBody,";");
		String tmp = st.nextToken();
		groupExps = getFieldDefine(tmp);
		if(st.hasMoreTokens()){
			tmp = st.nextToken();
			aggregateExps = getFieldDefine(tmp);
		}
		if(st.hasMoreTokens()){
			tmp = st.nextToken();
			maxN = getExpression(tmp);
		}
		return true;
	}
}