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17 package org.apache.logging.log4j.message;
18
19 import org.apache.logging.log4j.Logger;
20 import org.apache.logging.log4j.status.StatusLogger;
21
22 import java.io.IOException;
23 import java.io.ObjectInputStream;
24 import java.io.ObjectOutputStream;
25 import java.text.Format;
26 import java.text.MessageFormat;
27 import java.util.Arrays;
28 import java.util.regex.Pattern;
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33
34 public class FormattedMessage implements Message {
35
36 private static final Logger LOGGER = StatusLogger.getLogger();
37
38 private static final long serialVersionUID = -665975803997290697L;
39
40 private static final int HASHVAL = 31;
41
42 private static final String FORMAT_SPECIFIER = "%(\\d+\\$)?([-#+ 0,(\\<]*)?(\\d+)?(\\.\\d+)?([tT])?([a-zA-Z%])";
43
44 private static final Pattern MSG_PATTERN = Pattern.compile(FORMAT_SPECIFIER);
45
46 private String messagePattern;
47 private transient Object[] argArray;
48 private String[] stringArgs;
49 private transient String formattedMessage;
50 private final Throwable throwable;
51
52 private Message message;
53
54 public FormattedMessage(final String messagePattern, final Object[] arguments, final Throwable throwable) {
55 this.messagePattern = messagePattern;
56 this.argArray = arguments;
57 this.throwable = throwable;
58 }
59
60 public FormattedMessage(final String messagePattern, final Object[] arguments) {
61 this.messagePattern = messagePattern;
62 this.argArray = arguments;
63 this.throwable = null;
64 }
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69
70
71 public FormattedMessage(final String messagePattern, final Object arg) {
72 this.messagePattern = messagePattern;
73 this.argArray = new Object[] {arg};
74 this.throwable = null;
75 }
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83 public FormattedMessage(final String messagePattern, final Object arg1, final Object arg2) {
84 this(messagePattern, new Object[]{arg1, arg2});
85 }
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92 public String getFormattedMessage() {
93 if (formattedMessage == null) {
94 if (message == null) {
95 message = getMessage(messagePattern, argArray, throwable);
96 }
97 formattedMessage = message.getFormattedMessage();
98 }
99 return formattedMessage;
100 }
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106 public String getFormat() {
107 return messagePattern;
108 }
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114 public Object[] getParameters() {
115 if (argArray != null) {
116 return argArray;
117 }
118 return stringArgs;
119 }
120
121 protected Message getMessage(final String msgPattern, final Object[] args, final Throwable throwable) {
122 try {
123 final MessageFormat format = new MessageFormat(msgPattern);
124 final Format[] formats = format.getFormats();
125 if (formats != null && formats.length > 0) {
126 return new MessageFormatMessage(msgPattern, args);
127 }
128 } catch (final Exception ex) {
129
130 }
131 try {
132 if (MSG_PATTERN.matcher(msgPattern).find()) {
133 return new StringFormattedMessage(msgPattern, args);
134 }
135 } catch (final Exception ex) {
136
137 }
138 return new ParameterizedMessage(msgPattern, args, throwable);
139 }
140
141 @Override
142 public boolean equals(final Object o) {
143 if (this == o) {
144 return true;
145 }
146 if (o == null || getClass() != o.getClass()) {
147 return false;
148 }
149
150 final FormattedMessage that = (FormattedMessage) o;
151
152 if (messagePattern != null ? !messagePattern.equals(that.messagePattern) : that.messagePattern != null) {
153 return false;
154 }
155 if (!Arrays.equals(stringArgs, that.stringArgs)) {
156 return false;
157 }
158
159 return true;
160 }
161
162 @Override
163 public int hashCode() {
164 int result = messagePattern != null ? messagePattern.hashCode() : 0;
165 result = HASHVAL * result + (stringArgs != null ? Arrays.hashCode(stringArgs) : 0);
166 return result;
167 }
168
169
170 @Override
171 public String toString() {
172 return "FormattedMessage[messagePattern=" + messagePattern + ", args=" +
173 Arrays.toString(argArray) + "]";
174 }
175
176 private void writeObject(final ObjectOutputStream out) throws IOException {
177 out.defaultWriteObject();
178 getFormattedMessage();
179 out.writeUTF(formattedMessage);
180 out.writeUTF(messagePattern);
181 out.writeInt(argArray.length);
182 stringArgs = new String[argArray.length];
183 int i = 0;
184 for (final Object obj : argArray) {
185 stringArgs[i] = obj.toString();
186 ++i;
187 }
188 }
189
190 private void readObject(final ObjectInputStream in) throws IOException, ClassNotFoundException {
191 in.defaultReadObject();
192 formattedMessage = in.readUTF();
193 messagePattern = in.readUTF();
194 final int length = in.readInt();
195 stringArgs = new String[length];
196 for (int i = 0; i < length; ++i) {
197 stringArgs[i] = in.readUTF();
198 }
199 }
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205
206 public Throwable getThrowable() {
207 if (throwable != null) {
208 return throwable;
209 }
210 if (message == null) {
211 message = getMessage(messagePattern, argArray, throwable);
212 }
213 return message.getThrowable();
214 }
215 }