/*
 * Copyright (c) 2004-2013 QOS.ch
 * All rights reserved.
 *
 * Permission is hereby granted, free  of charge, to any person obtaining
 * a  copy  of this  software  and  associated  documentation files  (the
 * "Software"), to  deal in  the Software without  restriction, including
 * without limitation  the rights to  use, copy, modify,  merge, publish,
 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
 * permit persons to whom the Software  is furnished to do so, subject to
 * the following conditions:
 *
 * The  above  copyright  notice  and  this permission  notice  shall  be
 * included in all copies or substantial portions of the Software.
 *
 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.slf4j.impl;

import org.slf4j.ILoggerFactory;
import org.slf4j.Logger;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

/**
 * AndroidLoggerFactory is an implementation of {@link ILoggerFactory} returning
 * the appropriately named {@link AndroidLoggerFactory} instance.
 *
 * @author Andrey Korzhevskiy <a.korzhevskiy@gmail.com>
 */
class AndroidLoggerFactory implements ILoggerFactory {
    static final String ANONYMOUS_TAG = "null";
    static final int TAG_MAX_LENGTH = 23;

    private final ConcurrentMap<String, Logger> loggerMap = new ConcurrentHashMap<String, Logger>();


    /**
     * Return an appropriate {@link AndroidLoggerAdapter} instance by name.
     */
    public Logger getLogger(String name) {
        String tag = loggerNameToTag(name);
        Logger logger = loggerMap.get(tag);
        if (logger == null) {
            Logger newInstance = new AndroidLoggerAdapter(tag);
            Logger oldInstance = loggerMap.putIfAbsent(tag, newInstance);
            logger = oldInstance == null ? newInstance : oldInstance;
        }
        return logger;
    }

    /**
     * Tag names cannot be longer than {@value #TAG_MAX_LENGTH} characters on Android platform.
     *
     * Returns the short logger tag (up to {@value #TAG_MAX_LENGTH} characters) for the given logger name.
     * Traditionally loggers are named by fully-qualified Java classes; this
     * method attempts to return a concise identifying part of such names.
     *
     * See also:
     * android/system/core/include/cutils/property.h
     * android/frameworks/base/core/jni/android_util_Log.cpp
     * dalvik.system.DalvikLogging
     *
     */
    static String loggerNameToTag(String loggerName) {
        // Anonymous logger
        if (loggerName == null) {
            return ANONYMOUS_TAG;
        }

        int length = loggerName.length();
        if (length <= TAG_MAX_LENGTH) {
            return loggerName;
        }

        int lastTokenIndex = 0;
        int lastPeriodIndex;
        StringBuilder tagName = new StringBuilder();
        while ((lastPeriodIndex = loggerName.indexOf('.', lastTokenIndex)) != -1) {
            tagName.append(loggerName.charAt(lastTokenIndex));
            // token of one character appended as is otherwise truncate it to one character
            int tokenLength = lastPeriodIndex - lastTokenIndex;
            if (tokenLength > 1) {
                tagName.append('*');
            }
            tagName.append('.');
            lastTokenIndex = lastPeriodIndex + 1;
        }
        // last token (usually class name) appended as is
        tagName.append(loggerName, lastTokenIndex, length);
        if (tagName.length() <= TAG_MAX_LENGTH) {
            return tagName.toString();
        }

        // Either we had no useful dot location at all or name still too long.
        // Take leading part and append '*' to indicate that it was truncated
        lastPeriodIndex = loggerName.lastIndexOf('.');
        return lastPeriodIndex != -1 && length - (lastPeriodIndex + 1) <= TAG_MAX_LENGTH
                ? loggerName.substring(lastPeriodIndex + 1)
                : '*' + loggerName.substring(length - TAG_MAX_LENGTH + 1);
    }
}
@@ -1876,18 +1876,16 @@
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-%0D%0A
     /**%0D
@@ -3251,32 +3251,60 @@
 ;%0D%0A        %7D%0D%0A%0D%0A
+        int tagLength = 0;%0D%0A
         int last
@@ -3400,16 +3400,34 @@
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+TAG_MAX_LENGTH + 3
 );%0D%0A    
@@ -3903,24 +3903,30 @@
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+%0D%0A    
         
 %7D%0D%0A     
@@ -3921,162 +3921,434 @@
     
-%7D%0D%0A        // last token (usually class name) appended as is%0D%0A        tagName.append(loggerName,
+// check if name is already too long%0D%0A            tagLength = tagName.length();%0D%0A            if (tagLength %3E TAG_MAX_LENGTH) %7B%0D%0A                return getSimpleName(loggerName);%0D%0A            %7D%0D%0A        %7D%0D%0A%0D%0A        // Either we had no useful dot location at all%0D%0A        // or
  last
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+ t
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+ would exceed TAG_MAX_LENGTH%0D%0A        int tokenLength = length - lastTokenIndex;%0D%0A        if (tagLength == 0 %7C%7C (tagLength + tokenL
 ength
-(
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-%3C=
+%3E
  TAG
@@ -4386,25 +4386,32 @@
 urn 
-tagName.toString(
+getSimpleName(loggerName
 );%0D%0A
@@ -4438,75 +4438,222 @@
  // 
-Either we had no useful dot location at all or name still too long.
+last token (usually class name) appended as is%0D%0A        tagName.append(loggerName, lastTokenIndex, length);%0D%0A        return tagName.toString();%0D%0A    %7D%0D%0A%0D%0A    private static String getSimpleName(String loggerName) %7B
 %0D%0A  
@@ -4733,24 +4733,71 @@
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+int length = loggerName.length();%0D%0A        int 
 lastPeriodIn
@@ -4934,20 +4934,16 @@
         
-    
 ? logger
@@ -4979,20 +4979,16 @@
 x + 1)%0D%0A
-    
         

Optimize logger name truncation