org.apache.jena.propertytable.lang.LangCSV Maven / Gradle / Ivy

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jena.propertytable.lang;

import java.io.InputStream ;
import java.io.Reader ;
import java.util.ArrayList ;
import java.util.List ;

import org.apache.jena.atlas.csv.CSVParser ;
import org.apache.jena.atlas.lib.IRILib ;
import org.apache.jena.datatypes.xsd.XSDDatatype ;
import org.apache.jena.graph.Node ;
import org.apache.jena.graph.NodeFactory ;
import org.apache.jena.riot.Lang ;
import org.apache.jena.riot.RDFLanguages ;
import org.apache.jena.riot.lang.LangRIOT ;
import org.apache.jena.riot.system.* ;

/**
 * The LangRIOT implementation for CSV
 *
 */
public class LangCSV implements LangRIOT {

    /** @deprecated Use {@linkplain CSV2RDF#init} */
    @Deprecated
    public static void register() { CSV2RDF.init() ; }
    
	public static final String CSV_PREFIX = "http://w3c/future-csv-vocab/";
	public static final String CSV_ROW = CSV_PREFIX + "row";

	private InputStream input = null;
	private Reader reader = null;
	private String base;
	private String filename;
	private StreamRDF sink;
	private ParserProfile profile; // Warning - we don't use all of this.

	@Override
	public Lang getLang() {
		return RDFLanguages.CSV;
	}

	@Override
	public ParserProfile getProfile() {
		return profile;
	}

	@Override
	public void setProfile(ParserProfile profile) {
		this.profile = profile;
	}

	public LangCSV(Reader reader, String base, String filename, ErrorHandler errorHandler, StreamRDF sink) {
		this.reader = reader;
		this.base = base;
		this.filename = filename;
		this.sink = sink;
		this.profile = RiotLib.profile(getLang(), base, errorHandler);
	}

	public LangCSV(InputStream in, String base, String filename, ErrorHandler errorHandler, StreamRDF sink) {
		this.input = in;
		this.base = base;
		this.filename = filename;
		this.sink = sink;
		this.profile = RiotLib.profile(getLang(), base, errorHandler);
	}

	@Override
	public void parse() {
		sink.start();
		CSVParser parser = (input != null) ? CSVParser.create(input) : CSVParser.create(reader);
		List row = null;
		ArrayList predicates = new ArrayList();
		int rowNum = 0;
		while ((row = parser.parse1()) != null) {
			
			if (rowNum == 0) {
				for (String column : row) {
					String uri = IRIResolver.resolveString(filename) + "#"
							+ toSafeLocalname(column);
					Node predicate = this.profile.createURI(uri, rowNum, 0);
					predicates.add(predicate);
				}
			} else {
				//Node subject = this.profile.createBlankNode(null, -1, -1);
				Node subject = caculateSubject(rowNum, filename);
				Node predicateRow = this.profile.createURI(CSV_ROW, -1, -1);
				Node objectRow = this.profile
						.createTypedLiteral((rowNum + ""),
								XSDDatatype.XSDinteger, rowNum, 0);
				sink.triple(this.profile.createTriple(subject, predicateRow,
						objectRow, rowNum, 0));
				for (int col = 0; col < row.size() && col