/**
* Removes one phrase to the list of phrases recognised by this gazetteer
*
* @param text the phrase to be removed
* @param lookup the description of the annotation associated to this phrase
*/
public void removeLookup(String text, Lookup lookup) {
char currentChar;
FSMState currentState = initialState;
FSMState nextState;
Lookup oldLookup;
for (int i = 0; i < text.length(); i++) {
currentChar = text.charAt(i);
if (Character.isSpaceChar(currentChar) || Character.isWhitespace(currentChar))
currentChar = ' ';
nextState = currentState.next(currentChar);
if (nextState == null) return; // nothing to remove
currentState = nextState;
} // for(int i = 0; i< text.length(); i++)
currentState.removeLookup(lookup);
} // removeLookup
@Override
public boolean remove(String singleItem) {
char currentChar;
FSMState currentState = initialState;
FSMState nextState;
Lookup oldLookup;
for (int i = 0; i < singleItem.length(); i++) {
currentChar = singleItem.charAt(i);
if (Character.isSpaceChar(currentChar) || Character.isWhitespace(currentChar))
currentChar = ' ';
nextState = currentState.next(currentChar);
if (nextState == null) {
return false;
} // nothing to remove
currentState = nextState;
} // for(int i = 0; i< text.length(); i++)
currentState.lookupSet = new HashSet();
return true;
}
/**
* lookup <br>
*
* @param singleItem a single string to be looked up by the gazetteer
* @return set of the Lookups associated with the parameter
*/
@Override
public Set lookup(String singleItem) {
char currentChar;
Set set = new HashSet();
FSMState currentState = initialState;
FSMState nextState;
for (int i = 0; i < singleItem.length(); i++) {
currentChar = singleItem.charAt(i);
if (Character.isSpaceChar(currentChar) || Character.isWhitespace(currentChar))
currentChar = ' ';
nextState = currentState.next(currentChar);
if (nextState == null) {
return set;
}
currentState = nextState;
} // for(int i = 0; i< text.length(); i++)
set = currentState.getLookupSet();
return set;
}
/**
* Adds one phrase to the list of phrases recognised by this gazetteer
*
* @param text the phrase to be added
* @param lookup the description of the annotation to be added when this phrase is recognised
*/
public void addLookup(String text, Lookup lookup) {
char currentChar;
FSMState currentState = initialState;
FSMState nextState;
Lookup oldLookup;
boolean isSpace;
for (int i = 0; i < text.length(); i++) {
currentChar = text.charAt(i);
isSpace = Character.isSpaceChar(currentChar) || Character.isWhitespace(currentChar);
if (isSpace) currentChar = ' ';
else
currentChar =
(caseSensitive.booleanValue()) ? currentChar : Character.toUpperCase(currentChar);
nextState = currentState.next(currentChar);
if (nextState == null) {
nextState = new FSMState(this);
currentState.put(currentChar, nextState);
if (isSpace) nextState.put(' ', nextState);
}
currentState = nextState;
} // for(int i = 0; i< text.length(); i++)
currentState.addLookup(lookup);
// Out.println(text + "|" + lookup.majorType + "|" + lookup.minorType);
} // addLookup
/** Returns a string representation of the deterministic FSM graph using GML. */
public String getFSMgml() {
String res = "graph[ \ndirected 1\n";
StringBuffer nodes = new StringBuffer(gate.Gate.STRINGBUFFER_SIZE),
edges = new StringBuffer(gate.Gate.STRINGBUFFER_SIZE);
Iterator fsmStatesIter = fsmStates.iterator();
while (fsmStatesIter.hasNext()) {
FSMState currentState = (FSMState) fsmStatesIter.next();
int stateIndex = currentState.getIndex();
nodes.append("node[ id ");
nodes.append(stateIndex);
nodes.append(" label \"");
nodes.append(stateIndex);
if (currentState.isFinal()) {
nodes.append(",F\\n");
nodes.append(currentState.getLookupSet());
}
nodes.append("\" ]\n");
edges.append(currentState.getEdgesGML());
}
res += nodes.toString() + edges.toString() + "]\n";
return res;
} // getFSMgml
/**
* Creates the Lookup annotations according to a gazetteer match.
*
* @param matchingState the final FSMState that was reached while matching.
* @param matchedRegionStart the start of the matched text region.
* @param matchedRegionEnd the end of the matched text region.
* @param annotationSet the annotation set where the new annotations should be added.
*/
protected void createLookups(
FSMState matchingState,
long matchedRegionStart,
long matchedRegionEnd,
AnnotationSet annotationSet) {
Iterator lookupIter = matchingState.getLookupSet().iterator();
while (lookupIter.hasNext()) {
Lookup currentLookup = (Lookup) lookupIter.next();
FeatureMap fm = Factory.newFeatureMap();
fm.put(LOOKUP_MAJOR_TYPE_FEATURE_NAME, currentLookup.majorType);
if (null != currentLookup.oClass && null != currentLookup.ontology) {
fm.put(LOOKUP_CLASS_FEATURE_NAME, currentLookup.oClass);
fm.put(LOOKUP_ONTOLOGY_FEATURE_NAME, currentLookup.ontology);
}
if (null != currentLookup.minorType)
fm.put(LOOKUP_MINOR_TYPE_FEATURE_NAME, currentLookup.minorType);
if (null != currentLookup.languages)
fm.put(LOOKUP_LANGUAGE_FEATURE_NAME, currentLookup.languages);
if (null != currentLookup.features) {
fm.putAll(currentLookup.features);
}
try {
// if(currentLookup.annotationType==null || "".equals(currentLookup.annotationType)){
// annotationSet.add(new Long(matchedRegionStart),
// new Long(matchedRegionEnd + 1),
// LOOKUP_ANNOTATION_TYPE,
// fm);
// }else{
annotationSet.add(
new Long(matchedRegionStart),
new Long(matchedRegionEnd + 1),
currentLookup.annotationType, // this pojo attribute will have Lookup as a default tag.
fm);
// }
} catch (InvalidOffsetException ioe) {
throw new GateRuntimeException(ioe.toString());
}
} // while(lookupIter.hasNext())
}
/**
* This method runs the gazetteer. It assumes that all the needed parameters are set. If they are
* not, an exception will be fired.
*/
@Override
public void execute() throws ExecutionException {
interrupted = false;
AnnotationSet annotationSet;
// check the input
if (document == null) {
throw new ExecutionException("No document to process!");
}
if (annotationSetName == null || annotationSetName.equals("")) {
annotationSet = document.getAnnotations();
} else {
annotationSet = document.getAnnotations(annotationSetName);
}
fireStatusChanged("Performing look-up in " + document.getName() + "...");
String content = document.getContent().toString();
int length = content.length();
char currentChar;
FSMState currentState = initialState;
FSMState nextState;
FSMState lastMatchingState = null;
int matchedRegionEnd = 0;
int matchedRegionStart = 0;
int charIdx = 0;
int oldCharIdx = 0;
FeatureMap fm;
Lookup currentLookup;
while (charIdx < length) {
currentChar = content.charAt(charIdx);
if (Character.isSpaceChar(currentChar) || Character.isWhitespace(currentChar)) {
currentChar = ' ';
} else {
currentChar =
caseSensitive.booleanValue() ? currentChar : Character.toUpperCase(currentChar);
}
nextState = currentState.next(currentChar);
if (nextState == null) {
// the matching stopped
// if we had a successful match then act on it;
if (lastMatchingState != null) {
createLookups(lastMatchingState, matchedRegionStart, matchedRegionEnd, annotationSet);
lastMatchingState = null;
}
// reset the FSM (обходим каждую позицию т.е. сначала с 0, потом с 1, потом с 2)
charIdx = matchedRegionStart + 1;
matchedRegionStart = charIdx;
currentState = initialState;
} else { // go on with the matching
currentState = nextState;
// if we have a successful state then store it
if (currentState.isFinal()
&& ((!wholeWordsOnly.booleanValue())
|| ((matchedRegionStart == 0
|| !isWordInternal(content.charAt(matchedRegionStart - 1)))
&& (charIdx + 1 >= content.length()
|| !isWordInternal(content.charAt(charIdx + 1)))))) {
// we have a new match
// if we had an existing match and we need to annotate prefixes, then
// apply it
if (!longestMatchOnly && lastMatchingState != null) {
createLookups(lastMatchingState, matchedRegionStart, matchedRegionEnd, annotationSet);
}
matchedRegionEnd = charIdx;
lastMatchingState = currentState;
}
charIdx++;
if (charIdx == content.length()) {
// we can't go on, use the last matching state and restart matching
// from the next char
if (lastMatchingState != null) {
// let's add the new annotation(s)
createLookups(lastMatchingState, matchedRegionStart, matchedRegionEnd, annotationSet);
lastMatchingState = null;
}
// reset the FSM
charIdx = matchedRegionStart + 1;
matchedRegionStart = charIdx;
currentState = initialState;
}
}
// fire the progress event
if (charIdx - oldCharIdx > 256) {
fireProgressChanged((100 * charIdx) / length);
oldCharIdx = charIdx;
if (isInterrupted())
throw new ExecutionInterruptedException(
"The execution of the " + getName() + " gazetteer has been abruptly interrupted!");
}
} // while(charIdx < length)
// we've finished. If we had a stored match, then apply it.
if (lastMatchingState != null) {
createLookups(lastMatchingState, matchedRegionStart, matchedRegionEnd, annotationSet);
}
fireProcessFinished();
fireStatusChanged("Look-up complete!");
} // execute
