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

import com.scudata.ide.spl.etl.EtlConsts;
import com.scudata.ide.spl.etl.FieldDefine;
import com.scudata.ide.spl.etl.ObjectElement;
import com.scudata.ide.spl.etl.ParamInfo;
import com.scudata.ide.spl.etl.ParamInfoList;

/**
 * ?????????༭ CS.news()
 * ??????ǰ׺Cs??ʾ?α?
 * 
 * @author Joancy
 *
 */
public class CsNews extends ObjectElement {
	public String bigX;
	public ArrayList newFields;//??ʹ?õ????У? ????ʽ???ֶ???
	
	/**
	 * ??ȡ???ڽ???༭?Ĳ?????Ϣ?б?
	 */
	public ParamInfoList getParamInfoList() {
		ParamInfoList paramInfos = new ParamInfoList();
		ParamInfo.setCurrent(CsNews.class, this);

		paramInfos.add(new ParamInfo("bigX",EtlConsts.INPUT_CELLA));
		paramInfos.add(new ParamInfo("newFields",EtlConsts.INPUT_FIELDDEFINE_EXP_FIELD));
		
		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_CURSOR
	 */
	public byte getReturnType() {
		return EtlConsts.TYPE_CURSOR;
	}

	/**
	 * ??ȡ????????SPL????ʽ??ѡ?
	 */
	public String optionString() {
		return null;
	}

	/**
	 * ??ȡ????????SPL????ʽ?ĺ?????
	 */
	public String getFuncName() {
		return "news";
	}

	/**
	 * ??ȡ????????SPL????ʽ?ĺ?????
	 * ??setFuncBody???溯????Ȼ?????ʽ?ĸ?ֵҲ???ǻ????
	 */
	public String getFuncBody() {
		StringBuffer sb = new StringBuffer();
		sb.append( getExpressionExp(bigX) );
		sb.append(";");
		sb.append( getFieldDefineExp(newFields));
		return sb.toString();
	}

	/**
	 * ???ú?????
	 * @param funcBody ??????
	 */
	public boolean setFuncBody(String funcBody) {
		StringTokenizer st = new StringTokenizer(funcBody,";");
		bigX = getExpression( st.nextToken() );
		newFields = getFieldDefine( st.nextToken() );
		return true;
	}

}