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ARQ is a SPARQL 1.1 query engine for Apache Jena
/*
* 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.riot.lang;
import java.util.Collection;
import org.apache.jena.graph.Triple ;
import org.apache.jena.riot.system.PrefixMap;
import org.apache.jena.riot.system.PrefixMapFactory;
import org.apache.jena.riot.system.StreamRDF;
import org.apache.jena.sparql.core.Quad ;
/**
* Base class for StreamRDF implementations which store received
* objects in a {@link java.util.Collection}.
*
* The resulting collection can be retrieved via the {@link #getCollected()}
* method.
*
* Implementations are suitable for single-threaded parsing, for use with small
* data or distributed computing frameworks (e.g. Hadoop) where the overhead
* of creating many threads is significant.
*
* @param Type of the value stored in the collection
*/
public abstract class CollectorStreamBase implements StreamRDF {
private final PrefixMap prefixes = PrefixMapFactory.createForInput();
private String baseIri;
@Override
public void finish() {}
@Override
public void triple(Triple triple) {}
@Override
public void quad(Quad quad) {}
@Override
public void start() {}
@Override
public void base(String base) {
this.baseIri = base;
}
@Override
public void prefix(String prefix, String iri) {
prefixes.add(prefix, iri);
}
public PrefixMap getPrefixes() {
return prefixes;
}
public String getBaseIri() {
return baseIri;
}
/**
* @return The collection received by this instance.
*/
public abstract Collection getCollected();
}