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/*******************************************************************************
* Copyright (c) 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
*
* Contributors:
* Matthew Webster - initial implementation
*******************************************************************************/
package org.aspectj.weaver.tools;
public abstract class TraceFactory {
public final static String DEBUG_PROPERTY = "org.aspectj.tracing.debug";
public final static String FACTORY_PROPERTY = "org.aspectj.tracing.factory";
public final static String DEFAULT_FACTORY_NAME = "default";
protected static boolean debug = getBoolean(DEBUG_PROPERTY,false);
private static TraceFactory instance;
public Trace getTrace (Class clazz) {
return instance.getTrace(clazz);
}
public static TraceFactory getTraceFactory () {
return instance;
}
protected static boolean getBoolean(String name, boolean def) {
String defaultValue = String.valueOf(def);
String value = System.getProperty(name,defaultValue);
return Boolean.parseBoolean(value);
}
static {
/*
* Allow user to override default behaviour or specify their own factory
*/
String factoryName = System.getProperty(FACTORY_PROPERTY);
if (factoryName != null) try {
if (factoryName.equals(DEFAULT_FACTORY_NAME)) {
instance = new DefaultTraceFactory();
}
else {
Class<?> factoryClass = Class.forName(factoryName);
instance = (TraceFactory)factoryClass.getDeclaredConstructor().newInstance();
}
}
catch (Throwable th) {
if (debug) th.printStackTrace();
}
/*
* Try to load external trace infrastructure using supplied factories
*/
if (instance == null) try {
{
Class<?> factoryClass = Class.forName("org.aspectj.weaver.tools.Jdk14TraceFactory");
instance = (TraceFactory)factoryClass.getDeclaredConstructor().newInstance();
}
}
catch (Throwable th) {
if (debug) th.printStackTrace();
}
/*
* Use default trace
*/
if (instance == null) {
instance = new DefaultTraceFactory();
}
if (debug) System.err.println("TraceFactory.instance=" + instance);
}
}
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