/*
* #!
* Ontopia Engine
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* Licensed 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 net.ontopia.topicmaps.query.impl.utils;
import java.io.Writer;
import java.io.IOException;
import net.ontopia.utils.OntopiaRuntimeException;
import net.ontopia.topicmaps.query.impl.basic.QueryTracer;
/**
* INTERNAL: Used to get a trace from a specific query into a writer
* for ease of display. <b>Warning:</b> this method is not
* thread-safe; any other queries running simultaneously will pollute
* the trace.
*/
public class SimpleQueryTracer extends QueryTracer.TracePrinter {
private Writer out;
public SimpleQueryTracer(Writer out) {
this.out = out;
}
public boolean isEnabled() {
return true;
}
public void output(String message) {
try {
out.write(message + "\n");
out.flush();
} catch (IOException e) {
throw new OntopiaRuntimeException(e);
}
}
}