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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
/*******************************************************************************
* 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;
import java.io.File;
import java.lang.reflect.Array;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.regex.Pattern;
import org.aspectj.bridge.IMessage.Kind;
public abstract class AbstractTrace implements Trace {
private static final Pattern packagePrefixPattern = Pattern.compile("([^.])[^.]*(\\.)");
protected Class tracedClass;
private static SimpleDateFormat timeFormat;
protected AbstractTrace (Class clazz) {
this.tracedClass = clazz;
}
@Override
public abstract void enter (String methodName, Object thiz, Object[] args);
@Override
public abstract void enter(String methodName, Object thiz);
@Override
public abstract void exit(String methodName, Object ret);
@Override
public abstract void exit(String methodName, Throwable th);
/*
* Convenience methods
*/
public void enter (String methodName) {
enter(methodName,null,null);
}
@Override
public void enter (String methodName, Object thiz, Object arg) {
enter(methodName,thiz,new Object[] { arg });
}
@Override
public void enter (String methodName, Object thiz, boolean z) {
enter(methodName,thiz,Boolean.valueOf(z));
}
@Override
public void exit (String methodName, boolean b) {
exit(methodName,Boolean.valueOf(b));
}
@Override
public void exit (String methodName, int i) {
exit(methodName, Integer.valueOf(i));
}
@Override
public void event (String methodName, Object thiz, Object arg) {
event(methodName,thiz,new Object[] { arg });
}
@Override
public void warn(String message) {
warn(message,null);
}
@Override
public void error(String message) {
error(message,null);
}
@Override
public void fatal (String message) {
fatal(message,null);
}
/*
* Formatting
*/
protected String formatMessage(String kind, String className, String methodName, Object thiz, Object[] args) {
StringBuilder message = new StringBuilder();
Date now = new Date();
message.append(formatDate(now)).append(" ");
message.append(Thread.currentThread().getName()).append(" ");
message.append(kind).append(" ");
message.append(formatClassName(className));
message.append(".").append(methodName);
if (thiz != null) message.append(" ").append(formatObj(thiz));
if (args != null) message.append(" ").append(formatArgs(args));
return message.toString();
}
/**
* @param className full dotted class name
* @return short version of class name with package collapse to initials
*/
private String formatClassName(String className) {
return packagePrefixPattern.matcher(className).replaceAll("$1.");
}
protected String formatMessage(String kind, String text, Throwable th) {
StringBuilder message = new StringBuilder();
Date now = new Date();
message.append(formatDate(now)).append(" ");
message.append(Thread.currentThread().getName()).append(" ");
message.append(kind).append(" ");
message.append(text);
if (th != null) message.append(" ").append(formatObj(th));
return message.toString();
}
private static String formatDate (Date date) {
if (timeFormat == null) {
timeFormat = new SimpleDateFormat("HH:mm:ss.SSS");
}
return timeFormat.format(date);
}
/**
* Format objects safely avoiding toString which can cause recursion,
* NullPointerExceptions or highly verbose results.
*
* @param obj parameter to be formatted
* @return the formatted parameter
*/
protected Object formatObj(Object obj) {
/* These classes have a safe implementation of toString() */
if (obj == null
|| obj instanceof String
|| obj instanceof Number
|| obj instanceof Boolean
|| obj instanceof Exception
|| obj instanceof Character
|| obj instanceof Class
|| obj instanceof File
|| obj instanceof StringBuffer
|| obj instanceof URL
|| obj instanceof Kind
) return obj;
else if (obj.getClass().isArray()) {
return formatArray(obj);
}
else if (obj instanceof Collection) {
return formatCollection((Collection)obj);
}
else try {
// Classes can provide an alternative implementation of toString()
if (obj instanceof Traceable) {
return ((Traceable)obj).toTraceString();
}
// classname@hashcode
else return formatClassName(obj.getClass().getName()) + "@" + Integer.toHexString(System.identityHashCode(obj));
/* Object.hashCode() can be override and may thow an exception */
} catch (Exception ex) {
return obj.getClass().getName() + "@FFFFFFFF";
}
}
protected String formatArray(Object obj) {
return obj.getClass().getComponentType().getName() + "[" + Array.getLength(obj) + "]";
}
protected String formatCollection(Collection c) {
return c.getClass().getName() + "(" + c.size() + ")";
}
/**
* Format arguments into a comma separated list
*
* @param args array of arguments
* @return the formated list
*/
protected String formatArgs(Object[] args) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < args.length; i++) {
sb.append(formatObj(args[i]));
if (i < args.length-1) sb.append(", ");
}
return sb.toString();
}
protected Object[] formatObjects(Object[] args) {
for (int i = 0; i < args.length; i++) {
args[i] = formatObj(args[i]);
}
return args;
}
}