com.scudata.expression.mfn.xo.XlsImport 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.expression.mfn.xo;

import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.dm.Context;
import com.scudata.expression.IParam;
import com.scudata.expression.Node;
import com.scudata.expression.XOFunction;
import com.scudata.resources.AppMessage;
import com.scudata.resources.EngineMessage;

/**
 * xo.xlsimport(Fi,..;s,b:e) ??ҳs??ȡ?????
 * 
 * @t ?????Ǳ??⣬??b????ʱ??Ϊ??????b??
 * @c ???س??α꣬xo??????@r?򿪣???ʱe?????Ǹ???
 * @b ȥ??ǰ??Ŀհ??У?@cʱ??֧??
 */
public class XlsImport extends XOFunction {

	/**
	 * ????
	 */
	public Object calculate(Context ctx) {
		String opt = option;
		boolean isCursor = opt != null && opt.indexOf("c") > -1;
		if (isCursor && !file.supportCursor()) {
			MessageManager mm = AppMessage.get();
			throw new RQException("xlsimport"
					+ mm.getMessage("filexls.coptwithr"));
		}
		boolean hasTitle = opt != null && opt.indexOf("t") > -1;
		boolean removeBlank = opt != null && opt.indexOf("b") > -1;
		if (isCursor && removeBlank) {
			throw new RQException(AppMessage.get().getMessage("xlsimport.nocb"));
		}

		if (param == null) {
			try {
				return file.xlsimport(hasTitle, isCursor, removeBlank);
			} catch (Exception e) {
				throw new RQException(e.getMessage(), e);
			}
		}

		String[] fields = null;
		Object s = null;
		int start = 0;
		int end = 0;

		IParam fieldParam;
		if (param.getType() == IParam.Semicolon) {
			if (param.getSubSize() != 2) {
				MessageManager mm = EngineMessage.get();
				throw new RQException("xlsimport"
						+ mm.getMessage("function.invalidParam"));
			}

			fieldParam = param.getSub(0);
			IParam param1 = param.getSub(1);
			if (param1 == null) {
			} else if (param1.isLeaf()) {
				s = param1.getLeafExpression().calculate(ctx);
			} else {
				if (param1.getSubSize() != 2) {
					MessageManager mm = EngineMessage.get();
					throw new RQException("xlsimport"
							+ mm.getMessage("function.invalidParam"));
				}

				IParam sParam = param1.getSub(0);
				if (sParam != null) {
					s = sParam.getLeafExpression().calculate(ctx);
				}

				IParam posParam = param1.getSub(1);
				if (posParam == null) {
				} else if (posParam.isLeaf()) { // start
					Object obj = posParam.getLeafExpression().calculate(ctx);
					if (!(obj instanceof Number)) {
						MessageManager mm = EngineMessage.get();
						throw new RQException("xlsimport"
								+ mm.getMessage("function.paramTypeError"));
					}

					start = ((Number) obj).intValue();
				} else { // start:end
					if (posParam.getSubSize() != 2) {
						MessageManager mm = EngineMessage.get();
						throw new RQException("xlsimport"
								+ mm.getMessage("function.invalidParam"));
					}

					IParam sub0 = posParam.getSub(0);
					IParam sub1 = posParam.getSub(1);
					if (sub0 != null) {
						Object obj = sub0.getLeafExpression().calculate(ctx);
						if (!(obj instanceof Number)) {
							MessageManager mm = EngineMessage.get();
							throw new RQException("xlsimport"
									+ mm.getMessage("function.paramTypeError"));
						}

						start = ((Number) obj).intValue();
					}

					if (sub1 != null) {
						Object obj = sub1.getLeafExpression().calculate(ctx);
						if (!(obj instanceof Number)) {
							MessageManager mm = EngineMessage.get();
							throw new RQException("xlsimport"
									+ mm.getMessage("function.paramTypeError"));
						}

						end = ((Number) obj).intValue();
					}
				}
			}
		} else {
			fieldParam = param;
		}

		if (fieldParam != null) {
			if (fieldParam.isLeaf()) {
				fields = new String[] { fieldParam.getLeafExpression()
						.getIdentifierName() };
			} else {
				int count = fieldParam.getSubSize();
				fields = new String[count];
				for (int i = 0; i < count; ++i) {
					IParam sub = fieldParam.getSub(i);
					if (sub == null || !sub.isLeaf()) {
						MessageManager mm = EngineMessage.get();
						throw new RQException("xlsimport"
								+ mm.getMessage("function.invalidParam"));
					}

					fields[i] = sub.getLeafExpression().getIdentifierName();
				}
			}
		}
		if (s != null) {
			if (!(s instanceof String) && !(s instanceof Number)) {
				MessageManager mm = EngineMessage.get();
				throw new RQException("xlsimport"
						+ mm.getMessage("function.paramTypeError"));
			}
		}

		try {
			return file.xlsimport(fields, s, start, end, hasTitle, isCursor,
					removeBlank);
		} catch (Exception e) {
			throw new RQException(e.getMessage(), e);
		}
	}

	/**
	 * ?Խڵ????Ż?
	 * @param ctx ??????????
	 * @param Node ?Ż???Ľڵ?
	 */
	public Node optimize(Context ctx) {
		if (param != null) {
			// ?Բ??????Ż?
			param.optimize(ctx);
		}

		return this;
	}
}