Revision: 17302
http://sourceforge.net/p/gate/code/17302
Author: valyt
Date: 2014-02-13 18:35:43 +0000 (Thu, 13 Feb 2014)
Log Message:
-----------
Protect against illegal String content.
Modified Paths:
--------------
mimir/trunk/mimir-core/src/gate/mimir/index/mg4j/TokenIndexBuilder.java
Modified:
mimir/trunk/mimir-core/src/gate/mimir/index/mg4j/TokenIndexBuilder.java
===================================================================
--- mimir/trunk/mimir-core/src/gate/mimir/index/mg4j/TokenIndexBuilder.java
2014-02-13 16:39:11 UTC (rev 17301)
+++ mimir/trunk/mimir-core/src/gate/mimir/index/mg4j/TokenIndexBuilder.java
2014-02-13 18:35:43 UTC (rev 17302)
@@ -24,6 +24,14 @@
import gate.mimir.index.mg4j.zipcollection.DocumentData;
import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.CharacterCodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.CharsetEncoder;
+import java.nio.charset.CodingErrorAction;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.BlockingQueue;
@@ -48,6 +56,20 @@
public static final String TOKEN_INDEX_BASENAME = "token";
+ protected static final CharsetEncoder UTF8_CHARSET_ENCODER =
Charset.forName("UTF-8").newEncoder();
+
+ protected static final CharsetDecoder UTF8_CHARSET_DECODER =
Charset.forName("UTF-8").newDecoder();
+
+ static {
+ try {
+ UTF8_CHARSET_ENCODER.replaceWith("[UNMAPPED]".getBytes("UTF-8"));
+ UTF8_CHARSET_ENCODER.onMalformedInput(CodingErrorAction.REPLACE);
+ UTF8_CHARSET_ENCODER.onUnmappableCharacter(CodingErrorAction.REPLACE);
+ } catch(UnsupportedEncodingException e) {
+ // this should never happen
+ throw new RuntimeException("UTF-8 not supported");
+ }
+ }
/**
* A zip collection builder used to build a zip of the collection
* if this has been requested.
@@ -207,6 +229,18 @@
GATEDocument gateDocument) throws IndexException {
FeatureMap tokenFeatures = ann.getFeatures();
String value = (String)tokenFeatures.get(featureName);
+ // make sure we get valid UTF-8 content
+ // illegal strings will simply be rendered as "?"
+ try {
+ CharBuffer cb = CharBuffer.wrap(value);
+ ByteBuffer bb = UTF8_CHARSET_ENCODER.encode(cb);
+ cb = UTF8_CHARSET_DECODER.decode(bb);
+ value = cb.toString();
+ } catch(CharacterCodingException e) {
+ // this should not happen
+ value = null;
+ logger.error("Error while normalizing input", e);
+ }
currentTerm.replace(value == null ? "" : value);
//save the *unprocessed* term to the collection, if required.
if(collectionWriter != null) {
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