org.diirt.datasource.file.CSVFileFormat Maven / Gradle / Ivy

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Support for data source based on file updates.

There is a newer version: 3.1.7

/**
 * Copyright (C) 2010-14 diirt developers. See COPYRIGHT.TXT
 * All rights reserved. Use is subject to license terms. See LICENSE.TXT
 */
package org.diirt.datasource.file;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.Collections;
import java.util.Set;

import org.diirt.vtype.VTable;
import org.diirt.vtype.io.CSVIO;

/**
 * A FileFormat for reading .csv files into VTables
 * 
 * @author Kunal Shroff
 *
 */
public class CSVFileFormat implements FileFormat {

    private CSVIO io = new CSVIO();
    
    @Override
    public Object readValue(InputStream in) {
	VTable value = io.importVTable(new InputStreamReader(in));
	return value;
    }

    @Override
    public void writeValue(Object value, OutputStream out) {
	io.export(value, new OutputStreamWriter(out));
    }

    @Override
    public boolean isWriteSupported() {
	return true;
    }

    @Override
    public Set getFileExtensions() {
        return Collections.singleton("csv");
    }

}