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Issue Type:
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![Bug]() Bug
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Affects Versions:
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10.4, 11-beta |
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Assignee:
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Jody Garnett
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Components:
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main |
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Created:
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25/Jan/14 4:11 AM
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Description:
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3The pattern used in SimpleFeaturePropertyAccessorFactory to match property id is seriously flawed. It will accept strings as "===" or "34x?<>".
The comment says it is based on http://www.w3.org/TR/xml/#NT-Name so I looked up the spec and compared it with the pattern and I found following problems:
- \\u00C0\\u00D6 - should be \\u00C0-\\u00D6,
- \\u00C0\\u00D6 - is actually the same as \\u00C0-\\u00D6 which is used in the spec, but for the sake of consistency should be \\u00C0-\\u00D6,
- \\x10000-\\xEFFFF - a very serious one, more on this later,
- \\\\x10000-\\\\xEFFFF - another serious one.
\\x10000-\\xEFFFF is equivalent to: #x10 | "0" | "0" | 0-#xEF | "F" | "F" | "F"
According to the java.util.regex.Pattern javadoc the construct is \xhh so only two characters after \x are treated as a hexadecimal code, the rest are matched as-is so \\x10000-\\xEFFFF allows for \n (#x10) and any character between 0 and #xEF
\\\\x10000-\\\\xEFFFF is equivalent to: "\" | "x" | "1" | "0" | "0" | "0" | 0-\ | "x" | "E" | "F" | "F" | "F" | "F"
\\\\ ends as \\ and in a regular _expression_ it matches "\" character. This range allows for any character beteween 0 and \.
As Java character is only 16 bit wide the unicode characters in range #x10000-#xEFFFF cannot be represented as single Java characters. For this reason it is not possible (or at least not easy) to create regular _expression_ which would match such characters. To properly process such unicode strings one has to use codePoint* methods of the String class and not the character based ones.
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Project:
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GeoTools
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Priority:
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![Major]() Major
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Reporter:
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Sebastian Graca
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