org.eclipse.rdf4j.rio.helpers.AbstractRDFWriter Maven / Gradle / Ivy

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/*******************************************************************************
 * Copyright (c) 2015 Eclipse RDF4J contributors, Aduna, and others.
 * 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.
 *******************************************************************************/
package org.eclipse.rdf4j.rio.helpers;

import java.util.Collection;
import java.util.Collections;
import java.util.Map;

import org.eclipse.rdf4j.rio.RDFHandlerException;
import org.eclipse.rdf4j.rio.RDFWriter;
import org.eclipse.rdf4j.rio.RioSetting;
import org.eclipse.rdf4j.rio.WriterConfig;

/**
 * Base class for {@link RDFWriter}s offering common functionality for RDF writers.
 * 
 * @author Peter Ansell
 */
public abstract class AbstractRDFWriter implements RDFWriter {

	/**
	 * Mapping from namespace prefixes to namespace names.
	 */
	protected Map namespaceTable;

	/**
	 * A collection of configuration options for this writer.
	 */
	private WriterConfig writerConfig = new WriterConfig();

	/**
	 * Default constructor.
	 */
	public AbstractRDFWriter() {
	}

	@Override
	public void handleNamespace(String prefix, String uri)
		throws RDFHandlerException
	{
		namespaceTable.put(prefix, uri);
	}

	@Override
	public RDFWriter setWriterConfig(WriterConfig config) {
		this.writerConfig = config;
		return this;
	}

	@Override
	public WriterConfig getWriterConfig() {
		return this.writerConfig;
	}

	/*
	 * Default implementation. Implementing classes must override this to specify that they support given
	 * settings.
	 */
	@Override
	public Collection> getSupportedSettings() {
		return Collections.emptyList();
	}

	@Override
	public  RDFWriter set(RioSetting setting, T value) {
		getWriterConfig().set(setting, value);
		return this;
	}
}