AssertEmptyLog.java from DrJava at Krugle
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/*BEGIN_COPYRIGHT_BLOCK*
PLT Utilities BSD License
Copyright (c) 2007 JavaPLT group at Rice University
All rights reserved.
Developed by: Java Programming Languages Team
Rice University
http://www.cs.rice.edu/~javaplt/
Redistribution and use in source and binary forms, with or without modification, are permitted
provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions
and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or other materials provided
with the distribution.
- Neither the name of the JavaPLT group, Rice University, nor the names of the library's
contributors may be used to endorse or promote products derived from this software without
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package edu.rice.cs.plt.debug;
import java.util.Date;
import edu.rice.cs.plt.iter.SizedIterable;
import edu.rice.cs.plt.lambda.Predicate2;
import edu.rice.cs.plt.iter.IterUtil;
/**
* A log that triggers an assertion failure whenever it is written to. If necessary, a filter can be used so that
* only logging that occurs in a certain location or thread leads to a failure. (If assertions are disabled, no
* failures will occur, and this degenerates into a slightly more-expensive {@link VoidLog}.)
*/
public class AssertEmptyLog extends AbstractLog {
public AssertEmptyLog() { super(); }
public AssertEmptyLog(Predicate2<? super Thread, ? super StackTraceElement> filter) {
super(filter);
}
/** Trigger an assertion failure with a descriptive message */
protected void write(Date time, Thread thread, StackTraceElement location, SizedIterable<? extends String> messages) {
assert false : makeMessage(time, thread, location, messages);
}
private String makeMessage(Date time, Thread thread, StackTraceElement location,
SizedIterable<? extends String> messages) {
String first = "[" + formatLocation(location) + " - " + formatThread(thread) + " - " + formatTime(time) + "]";
return IterUtil.multilineToString(IterUtil.compose(first, messages));
}
/** Do nothing */
protected void push() {}
/** Do nothing */
protected void pop() {}
}
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