ArrayIndexOutOfBoundsException in dataStore.getFeatureReader() when GetFeature
response contains long UTF-8 strings
-------------------------------------------------------------------------------------------------------------------
Key: GEOT-2911
URL: http://jira.codehaus.org/browse/GEOT-2911
Project: GeoTools
Issue Type: Bug
Components: data wfs
Affects Versions: 2.6.0
Environment: win32, 1.6.0_13
Reporter: Dmitry Rykovanov
ArrayIndexOutOfBoundsException in dataStore.getFeatureReader() when GetFeature
response contains long UTF-8 text nodes. The reason is
org.xmlpull.mxp1.MXParser.fastHash( char ch[], int off, int len ) returns
negative value on long (length > 16) UTF-8 (with code > 255) string.
When MXParser used instead of MXParserCachingStrings this error doesn't occur,
but probably it will occur when response will contain elements with same long
UTF-8 names.
{quote}
protected static final int fastHash( char ch[], int off, int len ) {
if(len == 0) return 0;
//assert len >0
int hash = ch[off]; // hash at beginnig
//try {
hash = (hash << 7) + ch[ off + len - 1 ]; // hash at the end
//} catch(ArrayIndexOutOfBoundsException aie) {
// aie.printStackTrace(); //should never happen ...
// throw new RuntimeException("this is violation of pre-condition");
//}
if(len > 16) hash = (hash << 7) + ch[ off + (len / 4)]; // 1/4 from
beginning
if(len > 8) hash = (hash << 7) + ch[ off + (len / 2)]; // 1/2 of
string size ...
// notice that hash is at most done 3 times <<7 so shifted by 21 bits 8
bit value
// so max result == 29 bits so it is quite just below 31 bits for long
(2^32) ...
//assert hash >= 0;
return hash;
}
{quote}
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