/*
* 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 com.hp.hpl.jena.sparql.sse.writers;
import java.util.Iterator ;
import org.apache.jena.atlas.io.IndentedWriter ;
import com.hp.hpl.jena.graph.Graph ;
import com.hp.hpl.jena.graph.Node ;
import com.hp.hpl.jena.graph.Triple ;
import com.hp.hpl.jena.sparql.core.BasicPattern ;
import com.hp.hpl.jena.sparql.core.DatasetGraph ;
import com.hp.hpl.jena.sparql.serializer.SerializationContext ;
import com.hp.hpl.jena.sparql.sse.Tags ;
import com.hp.hpl.jena.sparql.util.FmtUtils ;
public class WriterGraph
{
public static final int NL = WriterLib.NL ;
public static final int NoNL = WriterLib.NoNL ;
public static final int NoSP = WriterLib.NoSP ;
public static void output(IndentedWriter out, Graph graph, SerializationContext naming)
{ output(out, graph, null, naming) ; }
public static void output(IndentedWriter out, Graph graph, String uri, SerializationContext naming)
{ writeGraph(out, graph, uri, naming) ; }
public static void output(IndentedWriter out, DatasetGraph dataset, SerializationContext naming)
{ writeDataset(out, dataset, naming) ; }
public static void output(IndentedWriter out, BasicPattern pattern, SerializationContext sCxt)
{
for ( Triple triple : pattern )
{
WriterNode.output(out, triple, sCxt) ;
out.println() ;
}
}
// ---- Workers
private static void writeDataset(IndentedWriter out, DatasetGraph ds, SerializationContext naming)
{
WriterLib.start(out, Tags.tagDataset, NL) ;
writeGraph(out, ds.getDefaultGraph(), naming) ;
out.ensureStartOfLine() ;
for ( Iterator<Node> iter = ds.listGraphNodes() ; iter.hasNext() ; )
{
Node node = iter.next() ;
out.ensureStartOfLine() ;
Graph g = ds.getGraph(node) ;
writeGraph(out, g, node, naming) ;
}
WriterLib.finish(out, Tags.tagDataset) ;
out.ensureStartOfLine() ;
}
// private static void writeModel(OutputContext out, Model m)
// { writeGraph(out, m.getGraph(), null) ; }
private static void writeGraph(IndentedWriter out, Graph g, SerializationContext naming)
{ _writeGraph(out, g, null, naming) ; }
// private static void writeGraph(OutputContext out, Model m, String uri)
// { writeGraph(out, m.getGraph(), uri) ; }
private static void writeGraph(IndentedWriter out, Graph g, String uri, SerializationContext naming)
{
String x = null ;
if ( uri != null )
x = FmtUtils.stringForURI(uri) ;
_writeGraph(out, g, x, naming) ;
}
private static void writeGraph(IndentedWriter out, Graph g, Node node, SerializationContext naming)
{
String x = null ;
if ( node != null )
x = FmtUtils.stringForNode(node) ;
_writeGraph(out, g, x, naming) ;
}
private static void _writeGraph(IndentedWriter out, Graph g, String label, SerializationContext naming)
{
WriterLib.start(out, Tags.tagGraph, NoSP) ;
if ( label != null )
{
out.print(" ") ;
out.print(label) ;
}
Iterator<Triple> iter = g.find(Node.ANY, Node.ANY, Node.ANY) ;
if ( ! iter.hasNext() )
{
// Empty.
WriterLib.finish(out, Tags.tagGraph) ;
return ;
}
// out.println() ;
// out.incIndent() ;
boolean first = true ;
for ( ; iter.hasNext() ; )
{
// if ( ! first )
out.println();
first = false ;
Triple triple = iter.next();
WriterNode.output(out, triple, naming) ;
}
// out.decIndent() ;
if ( ! first ) out.println();
WriterLib.finish(out, Tags.tagGraph) ;
}
}