Siphalor/tweed5-commons-logging
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Fix problem with "suggested" alternative for invalid log adapter class.

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Always trim whitespace from user-specified log adapter class name.


git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/logging/trunk@395181 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Simon Kitching
2006-04-19 08:57:54 +00:00
parent fea8fb4449
commit a7349b8120
1 changed files with 24 additions and 12 deletions
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36
src/java/org/apache/commons/logging/impl/LogFactoryImpl.java
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@@ -77,6 +77,8 @@ public class LogFactoryImpl extends LogFactory {
/** SimpleLog class name */
private static final String LOGGING_IMPL_SIMPLE_LOGGER = "org.apache.commons.logging.impl.SimpleLog";
private static final String PKG_IMPL="org.apache.commons.logging.impl.";
private static final int PKG_LEN = PKG_IMPL.length();
// ----------------------------------------------------------- Constructors
@@ -783,15 +785,13 @@ public class LogFactoryImpl extends LogFactory {
messageBuffer.append(specifiedLogClassName);
messageBuffer.append("' cannot be found or is not useable.");
//
// Mistyping or misspelling names is a common fault.
// Construct a good error message, if we can
if (specifiedLogClassName != null) {
final String trimmedName = specifiedLogClassName.trim();
informUponSimilarName(messageBuffer, trimmedName, LOGGING_IMPL_LOG4J_LOGGER);
informUponSimilarName(messageBuffer, trimmedName, LOGGING_IMPL_JDK14_LOGGER);
informUponSimilarName(messageBuffer, trimmedName, LOGGING_IMPL_LUMBERJACK_LOGGER);
informUponSimilarName(messageBuffer, trimmedName, LOGGING_IMPL_SIMPLE_LOGGER);
informUponSimilarName(messageBuffer, specifiedLogClassName, LOGGING_IMPL_LOG4J_LOGGER);
informUponSimilarName(messageBuffer, specifiedLogClassName, LOGGING_IMPL_JDK14_LOGGER);
informUponSimilarName(messageBuffer, specifiedLogClassName, LOGGING_IMPL_LUMBERJACK_LOGGER);
informUponSimilarName(messageBuffer, specifiedLogClassName, LOGGING_IMPL_SIMPLE_LOGGER);
}
throw new LogConfigurationException(messageBuffer.toString());
}
@@ -845,19 +845,25 @@ public class LogFactoryImpl extends LogFactory {
}
/**
* Appends message if the given name is similar to the candidate.
* @param messageBuffer <code>StringBuffer</code> the message should be appended to,
* not null
* @param name the (trimmed) name to be test against the candidate, not null
* @param candidate the candidate name
* @param candidate the candidate name (not null)
*/
private void informUponSimilarName(final StringBuffer messageBuffer, final String name,
final String candidate) {
// this formular (first four letters of the name excluding package)
// gives a reason guess
if (candidate.regionMatches(true, 0, name, 0, 38)) {
if (name.equals(candidate)) {
// Don't suggest a name that is exactly the same as the one the
// user tried...
return;
}
// If the user provides a name that is in the right package, and gets
// the first 4 characters of the adapter class right (ignoring case),
// then suggest the candidate adapter class name.
if (name.regionMatches(true, 0, candidate, 0, PKG_LEN + 4)) {
messageBuffer.append(" Did you mean '");
messageBuffer.append(candidate);
messageBuffer.append("'?");
@@ -917,8 +923,14 @@ public class LogFactoryImpl extends LogFactory {
}
}
// Remove any whitespace; it's never valid in a classname so its
// presence just means a user mistake. As we know what they meant,
// we may as well strip the spaces.
if (specifiedClass != null) {
specifiedClass = specifiedClass.trim();
}
return specifiedClass;
}