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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.file;

import com.scudata.dm.Context;
import com.scudata.dw.ComTable;
import com.scudata.expression.FileFunction;
import com.scudata.parallel.ClusterFile;

/**
 * ?????
 * f.open()
 * @author RunQian
 *
 */
public class Open extends FileFunction {
	public Object calculate(Context ctx) {
		if (file.isRemoteFile()) {
			// Զ???ļ?
			String host = file.getIP();
			int port = file.getPort();
			String fileName = file.getFileName();
			Integer partition = file.getPartition();
			int p = partition == null ? -1 : partition.intValue();
			ClusterFile cf = new ClusterFile(host, port, fileName, p, ctx);
			return cf.openGroupTable(ctx);
		} else {
			return ComTable.openBaseTable(file, ctx);
		}
	}
}