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Experimental Rio parser and writer implementation for the HDT file format.

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/*******************************************************************************
 * Copyright (c) 2020 Eclipse RDF4J contributors.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Distribution License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *******************************************************************************/
package org.eclipse.rdf4j.rio.hdt;

import java.io.IOException;
import java.io.InputStream;

/**
 * HDT DictionarySection factory.
 *
 * @author Bart Hanssens
 */
class HDTDictionarySectionFactory {
	/**
	 * Create a dictionary section from input stream. The name an starting position are provided for debugging purposes.
	 *
	 * @param is   input stream
	 * @param name name
	 * @param pos  starting position
	 * @return dictionary section
	 * @throws IOException
	 */
	static HDTDictionarySection parse(InputStream is, String name, long pos) throws IOException {
		int dtype = is.read();
		if (dtype != HDTDictionarySection.Type.FRONT.getValue()) {
			throw new UnsupportedOperationException("Dictionary " + name + ": encoding "
					+ Long.toHexString(dtype) + ", but only front encoding is supported");
		}
		return new HDTDictionarySectionPFC(name, pos);
	}
}