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package android.util;
import java.io.PrintWriter;
import java.io.StringWriter;
/**
* A stub for {@link android.util.Log} to be used in unit tests.
*
* It outputs the log statements to standard error.
*/
public final class Log {
/**
* Priority constant for the println method; use Log.v.
*/
public static final int VERBOSE = 2;
/**
* Priority constant for the println method; use Log.d.
*/
public static final int DEBUG = 3;
/**
* Priority constant for the println method; use Log.i.
*/
public static final int INFO = 4;
/**
* Priority constant for the println method; use Log.w.
*/
public static final int WARN = 5;
/**
* Priority constant for the println method; use Log.e.
*/
public static final int ERROR = 6;
/**
* Priority constant for the println method.
*/
public static final int ASSERT = 7;
private Log() {
}
/**
* Send a {@link #VERBOSE} log message.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
*/
public static int v(String tag, String msg) {
return println_native(LOG_ID_MAIN, VERBOSE, tag, msg);
}
/**
* Send a {@link #VERBOSE} log message and log the exception.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
* @param tr An exception to log
*/
public static int v(String tag, String msg, Throwable tr) {
return printlns(LOG_ID_MAIN, VERBOSE, tag, msg, tr);
}
/**
* Send a {@link #DEBUG} log message.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
*/
public static int d(String tag, String msg) {
return println_native(LOG_ID_MAIN, DEBUG, tag, msg);
}
/**
* Send a {@link #DEBUG} log message and log the exception.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
* @param tr An exception to log
*/
public static int d(String tag, String msg, Throwable tr) {
return printlns(LOG_ID_MAIN, DEBUG, tag, msg, tr);
}
/**
* Send an {@link #INFO} log message.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
*/
public static int i(String tag, String msg) {
return println_native(LOG_ID_MAIN, INFO, tag, msg);
}
/**
* Send a {@link #INFO} log message and log the exception.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
* @param tr An exception to log
*/
public static int i(String tag, String msg, Throwable tr) {
return printlns(LOG_ID_MAIN, INFO, tag, msg, tr);
}
/**
* Send a {@link #WARN} log message.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
*/
public static int w(String tag, String msg) {
return println_native(LOG_ID_MAIN, WARN, tag, msg);
}
/**
* Send a {@link #WARN} log message and log the exception.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
* @param tr An exception to log
*/
public static int w(String tag, String msg, Throwable tr) {
return printlns(LOG_ID_MAIN, WARN, tag, msg, tr);
}
/**
* Checks to see whether or not a log for the specified tag is loggable at the specified level.
*
* @return true in all cases (for unit test environment)
*/
public static boolean isLoggable(String tag, int level) {
return true;
}
/*
* Send a {@link #WARN} log message and log the exception.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param tr An exception to log
*/
public static int w(String tag, Throwable tr) {
return printlns(LOG_ID_MAIN, WARN, tag, "", tr);
}
/**
* Send an {@link #ERROR} log message.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
*/
public static int e(String tag, String msg) {
return println_native(LOG_ID_MAIN, ERROR, tag, msg);
}
/**
* Send a {@link #ERROR} log message and log the exception.
* @param tag Used to identify the source of a log message. It usually identifies
* the class or activity where the log call occurs.
* @param msg The message you would like logged.
* @param tr An exception to log
*/
public static int e(String tag, String msg, Throwable tr) {
return printlns(LOG_ID_MAIN, ERROR, tag, msg, tr);
}
/**
* What a Terrible Failure: Report a condition that should never happen.
* The error will always be logged at level ASSERT with the call stack.
* Depending on system configuration, a report may be added to the
* {@link android.os.DropBoxManager} and/or the process may be terminated
* immediately with an error dialog.
* @param tag Used to identify the source of a log message.
* @param msg The message you would like logged.
*/
public static int wtf(String tag, String msg) {
return wtf(LOG_ID_MAIN, tag, msg, null, false, false);
}
/**
* Like {@link #wtf(String, String)}, but also writes to the log the full
* call stack.
* @hide
*/
public static int wtfStack(String tag, String msg) {
return wtf(LOG_ID_MAIN, tag, msg, null, true, false);
}
/**
* What a Terrible Failure: Report an exception that should never happen.
* Similar to {@link #wtf(String, String)}, with an exception to log.
* @param tag Used to identify the source of a log message.
* @param tr An exception to log.
*/
public static int wtf(String tag, Throwable tr) {
return wtf(LOG_ID_MAIN, tag, tr.getMessage(), tr, false, false);
}
/**
* What a Terrible Failure: Report an exception that should never happen.
* Similar to {@link #wtf(String, Throwable)}, with a message as well.
* @param tag Used to identify the source of a log message.
* @param msg The message you would like logged.
* @param tr An exception to log. May be null.
*/
public static int wtf(String tag, String msg, Throwable tr) {
return wtf(LOG_ID_MAIN, tag, msg, tr, false, false);
}
/**
* Priority Constant for wtf.
* Added for this custom Log implementation, not in android sources.
*/
private static final int WTF = 8;
static int wtf(int logId, String tag, String msg, Throwable tr, boolean localStack,
boolean system) {
return printlns(LOG_ID_MAIN, WTF, tag, msg, tr);
}
private static final int LOG_ID_MAIN = 0;
private static final String[] PRIORITY_ABBREV = { "0", "1", "V", "D", "I", "W", "E", "A", "WTF" };
private static int println_native(int bufID, int priority, String tag, String msg) {
String res = PRIORITY_ABBREV[priority] + "/" + tag + " " + msg + System.lineSeparator();
System.err.print(res);
return res.length();
}
private static int printlns(int bufID, int priority, String tag, String msg,
Throwable tr) {
StringWriter trSW = new StringWriter();
if (tr != null) {
trSW.append(" , Exception: ");
PrintWriter trPW = new PrintWriter(trSW);
tr.printStackTrace(trPW);
trPW.flush();
}
return println_native(bufID, priority, tag, msg + trSW.toString());
}
}
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