Android: PatternSyntaxException: U_ILLEGAL_ARGUMENT_ERROR syntax error
I am using json-io to convert some JSON data to Java objects:
DataTransferContainer dataTransferContainer = (DataTransferContainer)JsonReader.jsonToJava(json);
The DataTransferContainer is just an object containing some GeoJson elements. It doesn't matter for this problem.
The above code works in a JUnit test outside of Android, but when I run it on Android I get this RuntimeException:
12-07 20:12:51.260: E/AndroidRuntime(2002): FATAL EXCEPTION: AsyncTask #1
12-07 20:12:51.260: E/AndroidRuntime(2002): java.lang.RuntimeException: An error occured while executing doInBackground()
12-07 20:12:51.260: E/AndroidRuntime(2002): at android.os.AsyncTask$3.done(AsyncTask.java:200)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.concurrent.FutureTask.run(FutureTask.java:138)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.lang.Thread.run(Thread.java:1019)
12-07 20:12:51.260: E/AndroidRuntime(2002): Caused by: java.lang.ExceptionInInitializerError
12-07 20:12:51.260: E/AndroidRuntime(2002): at com.mydomain.myapp.dataprocessing.JsonConverter.jsonObjectToObject(JsonConverter.java:22)
12-07 20:12:51.260: E/AndroidRuntime(2002): at com.mydomain.myapp.dataprocessing.DataManagerTask.processDataFromRemote(DataManagerTask.java:104)
12-07 20:12:51.260: E/AndroidRuntime(2002): at com.mydomain.myapp.dataprocessing.DataManagerTask.doInBackground(DataManagerTask.java:56)
12-07 20:12:51.260: E/AndroidRuntime(2002): at com.mydomain.myapp.dataprocessing.DataManagerTask.doInBackground(DataManagerTask.java:18)
12-07 20:12:51.260: E/AndroidRuntime(2002): at android.os.AsyncTask$2.call(AsyncTask.java:185)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
12-07 20:12:51.260: E/AndroidRuntime(2002): ... 4 more
12-07 20:12:51.260: E/AndroidRuntime(2002): Caused by: java.util.regex.PatternSyntaxException: Syntax error U_ILLEGAL_ARGUMENT_ERROR
12-07 20:12:51.260: E/AndroidRuntime(2002): (\d{2})[:.](\d{2})[:.](\d{2})[.](\d{1,10})([+-]\d{2}[:]?\d{2}|Z)?
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.regex.Pattern.compileImpl(Native Method)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.regex.Pattern.compile(Pattern.java:400)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.regex.Pattern.<init>(Pattern.java:383)
12-07 20:12:51.260: E/AndroidRuntime(2002): at java.util.regex.Pattern.compile(Pattern.java:374)
12-07 20:12:51.260: E/AndroidRuntime(2002): at com.cedarsoftware.util.io.JsonReader.<clinit>(JsonReader.java:114)
12-07 20:12:51.260: E/AndroidRuntime(2002): ... 10 more
In JsonReader, line 114 looks like this:
private static final Pattern timePattern1 = Pattern.compile("(\\d{2})[:.](\\d{2})[:.](\\d{2})[.](\\d{1,10})([+-]\\d{2}[:]?\\d{2}|Z)?");
I was able to narrow it down. This part: [:.]
It simply means "any character" or "colon". What's wrong with this on Android?
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In ICU regular expression patterns, the parenthesis expression pattern cannot begin with :
.
You need to change your template to
Pattern.compile("(\\d{2})[.:](\\d{2})[.:](\\d{2})[.](\\d{1,10})([+-]\\d{2}:?\\d{2}|Z)?")
Please note the changes:
-
[:]
changed to:
-
[:.]
changed to[.:]
The regex library used in Android is ICU, and one of its features is that it supports POSIX character classes outside of parenthesis expressions. This means that you can write [[:digit:]]
to match a digit or [:digit:]
(which is not valid in most other regex variants, including POSIX). The ICU regex parser seems to have problems parsing parenthesized expressions starting with :
and is undoubtedly a bug.
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