org.apache.jena.sparql.sse.lang.ParseHandlerDebug Maven / Gradle / Ivy
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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.sparql.sse.lang;
import org.apache.jena.sparql.sse.Item ;
/** Tracing parser handler - logs what the core parse sees */
public class ParseHandlerDebug implements ParseHandler
{
int count = 0 ;
private void indent()
{
for ( int i = 0 ; i < count ; i++ ) System.out.print(" ") ;
}
private void start(int line, int column)
{
System.out.print("["+line+", "+column+"] ") ;
indent() ;
}
@Override
public Item getItem() { return null ; }
@Override
public void parseStart()
{ System.out.println("<<<<") ; }
@Override
public void parseFinish()
{ System.out.println(">>>>") ; }
@Override
public void listStart(int line, int column)
{
start(line, column) ;
count++ ;
System.out.println("(") ;
}
@Override
public void listFinish(int line, int column)
{
count-- ;
start(line, column) ;
System.out.println(")") ;
}
@Override
public void emitBNode(int line, int column, String label)
{
start(line, column) ;
System.out.println("BNode: "+label) ;
}
@Override
public void emitIRI(int line, int column, String iriStr)
{
start(line, column) ;
System.out.println("IRI: "+iriStr) ;
}
@Override
public void emitLiteral(int line, int column, String lex, String lang, String datatype_iri, String datatype_pn)
{
start(line, column) ;
if ( lang != null )
System.out.println("Literal: "+lex+" @"+lang) ;
else if ( datatype_iri != null )
System.out.println("Literal: "+lex+" ^^"+datatype_iri) ;
else if ( datatype_pn != null )
System.out.println("Literal: "+lex+" ^^"+datatype_pn) ;
}
@Override
public void emitPName(int line, int column, String pname)
{
start(line, column) ;
System.out.println("PName: "+pname) ;
}
@Override
public void emitSymbol(int line, int column, String symbol)
{
start(line, column) ;
System.out.println("Symbol: "+symbol) ;
}
@Override
public void emitVar(int line, int column, String varName)
{
start(line, column) ;
System.out.println("Var: "+varName) ;
}
}