| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache license, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the license for the specific language governing permissions and |
| * limitations under the license. |
| */ |
| package org.apache.logging.log4j.message; |
| |
| import java.io.Serializable; |
| import java.text.SimpleDateFormat; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Date; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| /** |
| * Handles messages that consist of a format string containing '{}' to represent each replaceable token, and |
| * the parameters. |
| * <p/> |
| * This class was originally written for Lillith (http://mac.freshmeat.net/projects/lilith-viewer) by |
| * Joern Huxhorn where it is licensed under the LGPL. It has been relicensed here with his permission |
| * providing that this attribution remain. |
| */ |
| public class ParameterizedMessage implements Message, Serializable { |
| |
| /** |
| * Prefix for recursion. |
| */ |
| public static final String RECURSION_PREFIX = "[..."; |
| /** |
| * Suffix for recursion. |
| */ |
| public static final String RECURSION_SUFFIX = "...]"; |
| |
| /** |
| * Prefix for errors. |
| */ |
| public static final String ERROR_PREFIX = "[!!!"; |
| /** |
| * Separator for errors. |
| */ |
| public static final String ERROR_SEPARATOR = "=>"; |
| /** |
| * Separator for error messages. |
| */ |
| public static final String ERROR_MSG_SEPARATOR = ":"; |
| /** |
| * Suffix for errors. |
| */ |
| public static final String ERROR_SUFFIX = "!!!]"; |
| |
| private static final long serialVersionUID = -665975803997290697L; |
| |
| private static final int HASHVAL = 31; |
| |
| private static final char DELIM_START = '{'; |
| private static final char DELIM_STOP = '}'; |
| private static final char ESCAPE_CHAR = '\\'; |
| |
| private String messagePattern; |
| private String[] stringArgs; |
| private transient Object[] argArray; |
| private transient String formattedMessage; |
| private transient Throwable throwable; |
| |
| /** |
| * Create the ParameterizedMessage. |
| */ |
| public ParameterizedMessage() { |
| this(null, null, null); |
| } |
| |
| /** |
| * Create the parameterizedMessage. |
| * @param messagePattern The message "format" string. This will be a String containing "{}" placeholders |
| * where parameters should be substituted. |
| * @param stringArgs The arguments for substitution. |
| * @param throwable A Throwable. |
| */ |
| public ParameterizedMessage(String messagePattern, String[] stringArgs, Throwable throwable) { |
| this.messagePattern = messagePattern; |
| this.stringArgs = stringArgs; |
| this.throwable = throwable; |
| } |
| |
| public ParameterizedMessage(String messagePattern, Object[] arguments, Throwable throwable) { |
| this.messagePattern = messagePattern; |
| this.throwable = throwable; |
| if (arguments != null) { |
| parseArguments(arguments); |
| } |
| } |
| |
| /** |
| * <p>This method returns a ParameterizedMessage which contains the arguments converted to String |
| * as well as an optional Throwable.</p> |
| * <p/> |
| * <p>If the last argument is a Throwable and is NOT used up by a placeholder in the message pattern it is returned |
| * in ParameterizedMessage.getThrowable() and won't be contained in the created String[].<br/> |
| * If it is used up ParameterizedMessage.getThrowable() will return null even if the last argument was a |
| * Throwable!</p> |
| * |
| * @param messagePattern the message pattern that to be checked for placeholders. |
| * @param arguments the argument array to be converted. |
| */ |
| public ParameterizedMessage(String messagePattern, Object[] arguments) { |
| this.messagePattern = messagePattern; |
| if (arguments == null) { |
| return; |
| } |
| parseArguments(arguments); |
| } |
| |
| /** |
| * Constructor with a pattern and a single parameter. |
| * @param messagePattern The message pattern. |
| * @param arg The parameter. |
| */ |
| public ParameterizedMessage(String messagePattern, Object arg) { |
| this(messagePattern, new Object[]{arg}); |
| } |
| |
| /** |
| * Constructor with a pattern and two parameters. |
| * @param messagePattern The message pattern. |
| * @param arg1 The first parameter. |
| * @param arg2 The second parameter. |
| */ |
| public ParameterizedMessage(String messagePattern, Object arg1, Object arg2) { |
| this(messagePattern, new Object[]{arg1, arg2}); |
| } |
| |
| private void parseArguments(Object[] arguments) { |
| int argsCount = countArgumentPlaceholders(messagePattern); |
| int resultArgCount = arguments.length; |
| if (argsCount < arguments.length) { |
| if (throwable == null && arguments[arguments.length - 1] instanceof Throwable) { |
| throwable = (Throwable) arguments[arguments.length - 1]; |
| resultArgCount--; |
| } |
| } |
| argArray = new Object[resultArgCount]; |
| for (int i = 0; i < resultArgCount; ++i) { |
| argArray[i] = arguments[i]; |
| } |
| |
| if (argsCount == 1 && throwable == null && arguments.length > 1) { |
| // special case |
| stringArgs = new String[1]; |
| stringArgs[0] = deepToString(arguments); |
| } else { |
| stringArgs = new String[resultArgCount]; |
| for (int i = 0; i < stringArgs.length; i++) { |
| stringArgs[i] = deepToString(arguments[i]); |
| } |
| } |
| } |
| |
| /** |
| * Return the formatted message. |
| * @return the formatted message. |
| */ |
| public String getFormattedMessage() { |
| if (formattedMessage == null) { |
| formattedMessage = formatMessage(messagePattern, stringArgs); |
| } |
| return formattedMessage; |
| } |
| |
| /** |
| * Returns the message pattern. |
| * @return the message pattern. |
| */ |
| public String getMessageFormat() { |
| return messagePattern; |
| } |
| |
| /** |
| * Set the message pattern. |
| * @param messagePattern The message pattern. |
| */ |
| public void setMessageFormat(String messagePattern) { |
| this.messagePattern = messagePattern; |
| this.formattedMessage = null; |
| } |
| |
| /** |
| * Returns the message parameters. |
| * @return the message parameters. |
| */ |
| public Object[] getParameters() { |
| if (argArray != null) { |
| return argArray; |
| } |
| return stringArgs; |
| } |
| |
| /** |
| * Sets the parameters for the message. |
| * @param parameters The parameters. |
| */ |
| public void setParameters(String[] parameters) { |
| this.stringArgs = parameters; |
| this.formattedMessage = null; |
| } |
| |
| /** |
| * Sets the parameters for the message. |
| * @param parameters The parameters. |
| */ |
| public void setParameters(Object[] parameters) { |
| parseArguments(parameters); |
| this.formattedMessage = null; |
| } |
| |
| /** |
| * Set the Throwable for the message. |
| * @param throwable The Throwable. |
| */ |
| public void setThrowable(Throwable throwable) { |
| this.throwable = throwable; |
| } |
| |
| /** |
| * Returns the Throwable that was given as the last argument, if any. |
| * It will not survive serialization. The Throwable exists as part of the message |
| * primarily so that it can be extracted from the end of the list of parameters |
| * and then be added to the LogEvent. As such, the Throwable in the event should |
| * not be used once the LogEvent has been constructed. |
| * |
| * @return the Throwable, if any. |
| */ |
| public Throwable getThrowable() { |
| return throwable; |
| } |
| |
| protected String formatMessage(String msgPattern, String[] sArgs) { |
| return format(msgPattern, sArgs); |
| } |
| |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| ParameterizedMessage that = (ParameterizedMessage) o; |
| |
| if (messagePattern != null ? !messagePattern.equals(that.messagePattern) : that.messagePattern != null) { |
| return false; |
| } |
| if (!Arrays.equals(stringArgs, that.stringArgs)) { |
| return false; |
| } |
| //if (throwable != null ? !throwable.equals(that.throwable) : that.throwable != null) return false; |
| |
| return true; |
| } |
| |
| public int hashCode() { |
| int result = messagePattern != null ? messagePattern.hashCode() : 0; |
| result = HASHVAL * result + (stringArgs != null ? Arrays.hashCode(stringArgs) : 0); |
| return result; |
| } |
| |
| /** |
| * Replace placeholders in the given messagePattern with arguments. |
| * |
| * @param messagePattern the message pattern containing placeholders. |
| * @param arguments the arguments to be used to replace placeholders. |
| * @return the formatted message. |
| */ |
| public static String format(String messagePattern, Object[] arguments) { |
| if (messagePattern == null || arguments == null || arguments.length == 0) { |
| return messagePattern; |
| } |
| |
| StringBuilder result = new StringBuilder(); |
| int escapeCounter = 0; |
| int currentArgument = 0; |
| for (int i = 0; i < messagePattern.length(); i++) { |
| char curChar = messagePattern.charAt(i); |
| if (curChar == ESCAPE_CHAR) { |
| escapeCounter++; |
| } else { |
| if (curChar == DELIM_START) { |
| if (i < messagePattern.length() - 1) { |
| if (messagePattern.charAt(i + 1) == DELIM_STOP) { |
| // write escaped escape chars |
| int escapedEscapes = escapeCounter / 2; |
| for (int j = 0; j < escapedEscapes; j++) { |
| result.append(ESCAPE_CHAR); |
| } |
| |
| if (escapeCounter % 2 == 1) { |
| // i.e. escaped |
| // write escaped escape chars |
| result.append(DELIM_START); |
| result.append(DELIM_STOP); |
| } else { |
| // unescaped |
| if (currentArgument < arguments.length) { |
| result.append(arguments[currentArgument]); |
| } else { |
| result.append(DELIM_START).append(DELIM_STOP); |
| } |
| currentArgument++; |
| } |
| i++; |
| escapeCounter = 0; |
| continue; |
| } |
| } |
| } |
| // any other char beside ESCAPE or DELIM_START/STOP-combo |
| // write unescaped escape chars |
| if (escapeCounter > 0) { |
| for (int j = 0; j < escapeCounter; j++) { |
| result.append(ESCAPE_CHAR); |
| } |
| escapeCounter = 0; |
| } |
| result.append(curChar); |
| } |
| } |
| return result.toString(); |
| } |
| |
| /** |
| * Counts the number of unescaped placeholders in the given messagePattern. |
| * |
| * @param messagePattern the message pattern to be analyzed. |
| * @return the number of unescaped placeholders. |
| */ |
| public static int countArgumentPlaceholders(String messagePattern) { |
| if (messagePattern == null) { |
| return 0; |
| } |
| |
| int delim = messagePattern.indexOf(DELIM_START); |
| |
| if (delim == -1) { |
| // special case, no placeholders at all. |
| return 0; |
| } |
| int result = 0; |
| boolean isEscaped = false; |
| for (int i = 0; i < messagePattern.length(); i++) { |
| char curChar = messagePattern.charAt(i); |
| if (curChar == ESCAPE_CHAR) { |
| isEscaped = !isEscaped; |
| } else if (curChar == DELIM_START) { |
| if (!isEscaped) { |
| if (i < messagePattern.length() - 1) { |
| if (messagePattern.charAt(i + 1) == DELIM_STOP) { |
| result++; |
| i++; |
| } |
| } |
| } |
| isEscaped = false; |
| } else { |
| isEscaped = false; |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * This method performs a deep toString of the given Object. |
| * Primitive arrays are converted using their respective Arrays.toString methods while |
| * special handling is implemented for "container types", i.e. Object[], Map and Collection because those could |
| * contain themselves. |
| * <p/> |
| * It should be noted that neither AbstractMap.toString() nor AbstractCollection.toString() implement such a |
| * behavior. They only check if the container is directly contained in itself, but not if a contained container |
| * contains the original one. Because of that, Arrays.toString(Object[]) isn't safe either. |
| * Confusing? Just read the last paragraph again and check the respective toString() implementation. |
| * <p/> |
| * This means, in effect, that logging would produce a usable output even if an ordinary System.out.println(o) |
| * would produce a relatively hard-to-debug StackOverflowError. |
| * @param o The object. |
| * @return The String representation. |
| */ |
| public static String deepToString(Object o) { |
| if (o == null) { |
| return null; |
| } |
| if (o instanceof String) { |
| return (String) o; |
| } |
| StringBuilder str = new StringBuilder(); |
| Set<String> dejaVu = new HashSet<String>(); // that's actually a neat name ;) |
| recursiveDeepToString(o, str, dejaVu); |
| return str.toString(); |
| } |
| |
| /** |
| * This method performs a deep toString of the given Object. |
| * Primitive arrays are converted using their respective Arrays.toString methods while |
| * special handling is implemented for "container types", i.e. Object[], Map and Collection because those could |
| * contain themselves. |
| * <p/> |
| * dejaVu is used in case of those container types to prevent an endless recursion. |
| * <p/> |
| * It should be noted that neither AbstractMap.toString() nor AbstractCollection.toString() implement such a |
| * behavior. |
| * They only check if the container is directly contained in itself, but not if a contained container contains the |
| * original one. Because of that, Arrays.toString(Object[]) isn't safe either. |
| * Confusing? Just read the last paragraph again and check the respective toString() implementation. |
| * <p/> |
| * This means, in effect, that logging would produce a usable output even if an ordinary System.out.println(o) |
| * would produce a relatively hard-to-debug StackOverflowError. |
| * |
| * @param o the Object to convert into a String |
| * @param str the StringBuilder that o will be appended to |
| * @param dejaVu a list of container identities that were already used. |
| */ |
| private static void recursiveDeepToString(Object o, StringBuilder str, Set<String> dejaVu) { |
| if (o == null) { |
| str.append("null"); |
| return; |
| } |
| if (o instanceof String) { |
| str.append(o); |
| return; |
| } |
| |
| Class oClass = o.getClass(); |
| if (oClass.isArray()) { |
| if (oClass == byte[].class) { |
| str.append(Arrays.toString((byte[]) o)); |
| } else if (oClass == short[].class) { |
| str.append(Arrays.toString((short[]) o)); |
| } else if (oClass == int[].class) { |
| str.append(Arrays.toString((int[]) o)); |
| } else if (oClass == long[].class) { |
| str.append(Arrays.toString((long[]) o)); |
| } else if (oClass == float[].class) { |
| str.append(Arrays.toString((float[]) o)); |
| } else if (oClass == double[].class) { |
| str.append(Arrays.toString((double[]) o)); |
| } else if (oClass == boolean[].class) { |
| str.append(Arrays.toString((boolean[]) o)); |
| } else if (oClass == char[].class) { |
| str.append(Arrays.toString((char[]) o)); |
| } else { |
| // special handling of container Object[] |
| String id = identityToString(o); |
| if (dejaVu.contains(id)) { |
| str.append(RECURSION_PREFIX).append(id).append(RECURSION_SUFFIX); |
| } else { |
| dejaVu.add(id); |
| Object[] oArray = (Object[]) o; |
| str.append("["); |
| boolean first = true; |
| for (Object current : oArray) { |
| if (first) { |
| first = false; |
| } else { |
| str.append(", "); |
| } |
| recursiveDeepToString(current, str, new HashSet<String>(dejaVu)); |
| } |
| str.append("]"); |
| } |
| //str.append(Arrays.deepToString((Object[]) o)); |
| } |
| } else if (o instanceof Map) { |
| // special handling of container Map |
| String id = identityToString(o); |
| if (dejaVu.contains(id)) { |
| str.append(RECURSION_PREFIX).append(id).append(RECURSION_SUFFIX); |
| } else { |
| dejaVu.add(id); |
| Map oMap = (Map) o; |
| str.append("{"); |
| boolean isFirst = true; |
| for (Object o1 : oMap.entrySet()) { |
| Map.Entry current = (Map.Entry) o1; |
| if (isFirst) { |
| isFirst = false; |
| } else { |
| str.append(", "); |
| } |
| Object key = current.getKey(); |
| Object value = current.getValue(); |
| recursiveDeepToString(key, str, new HashSet<String>(dejaVu)); |
| str.append("="); |
| recursiveDeepToString(value, str, new HashSet<String>(dejaVu)); |
| } |
| str.append("}"); |
| } |
| } else if (o instanceof Collection) { |
| // special handling of container Collection |
| String id = identityToString(o); |
| if (dejaVu.contains(id)) { |
| str.append(RECURSION_PREFIX).append(id).append(RECURSION_SUFFIX); |
| } else { |
| dejaVu.add(id); |
| Collection oCol = (Collection) o; |
| str.append("["); |
| boolean isFirst = true; |
| for (Object anOCol : oCol) { |
| if (isFirst) { |
| isFirst = false; |
| } else { |
| str.append(", "); |
| } |
| recursiveDeepToString(anOCol, str, new HashSet<String>(dejaVu)); |
| } |
| str.append("]"); |
| } |
| } else if (o instanceof Date) { |
| Date date = (Date) o; |
| SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ"); |
| // I'll leave it like this for the moment... this could probably be optimized using ThreadLocal... |
| str.append(format.format(date)); |
| } else { |
| // it's just some other Object, we can only use toString(). |
| try { |
| str.append(o.toString()); |
| } catch (Throwable t) { |
| str.append(ERROR_PREFIX); |
| str.append(identityToString(o)); |
| str.append(ERROR_SEPARATOR); |
| String msg = t.getMessage(); |
| String className = t.getClass().getName(); |
| str.append(className); |
| if (!className.equals(msg)) { |
| str.append(ERROR_MSG_SEPARATOR); |
| str.append(msg); |
| } |
| str.append(ERROR_SUFFIX); |
| } |
| } |
| } |
| |
| /** |
| * This method returns the same as if Object.toString() would not have been |
| * overridden in obj. |
| * <p/> |
| * Note that this isn't 100% secure as collisions can always happen with hash codes. |
| * <p/> |
| * Copied from Object.hashCode(): |
| * As much as is reasonably practical, the hashCode method defined by |
| * class <tt>Object</tt> does return distinct integers for distinct |
| * objects. (This is typically implemented by converting the internal |
| * address of the object into an integer, but this implementation |
| * technique is not required by the |
| * Java<font size="-2"><sup>TM</sup></font> |
| * programming language.) |
| * |
| * @param obj the Object that is to be converted into an identity string. |
| * @return the identity string as also defined in Object.toString() |
| */ |
| public static String identityToString(Object obj) { |
| if (obj == null) { |
| return null; |
| } |
| return obj.getClass().getName() + "@" + Integer.toHexString(System.identityHashCode(obj)); |
| } |
| |
| public String toString() { |
| return "ParameterizedMessage[messagePattern=" + messagePattern + ", stringArgs=" + |
| Arrays.toString(stringArgs) + ", throwable=" + throwable + "]"; |
| } |
| } |