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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.orcs.db.internal.search.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.osee.framework.core.exception.OseeCoreException;
import org.eclipse.osee.framework.core.exception.OseeExceptions;
import org.eclipse.osee.framework.jdk.core.type.MatchLocation;
import org.eclipse.osee.framework.jdk.core.util.Lib;
import org.eclipse.osee.orcs.search.CaseType;
/**
* @author Roberto E. Escobar
*/
public final class WordOrderMatcher {
public WordOrderMatcher() {
// Utility Class
}
public List<MatchLocation> findInStream(InputStream inputStream, String toSearch, CaseType caseType, boolean findAllMatchLocations) throws OseeCoreException {
List<MatchLocation> matchLocations = new ArrayList<MatchLocation>();
Reader reader = null;
try {
reader = new InputStreamReader(inputStream, "UTF-8");
boolean isCaseInsensitive = !caseType.isCaseSensitive();
char[] charsToSearch = WordsUtil.removeExtraSpacesAndSpecialCharacters(toSearch, isCaseInsensitive);
int charCount = 0;
int index = 0;
int value = 0;
boolean lastCharacterAddedWasWhiteSpace = false;
boolean currCharValid = false;
MatchLocation matchLocation = new MatchLocation();
while (value != -1) {
value = reader.read();
charCount++;
char currChar = (char) value;
if (isCaseInsensitive) {
currChar = Character.toLowerCase(currChar);
}
if (currChar != '\r' && currChar != '\n') {
if (WordsUtil.isPunctuationOrApostrophe(currChar)) {
currChar = ' ';
}
if (Character.isWhitespace(currChar)) {
if (!lastCharacterAddedWasWhiteSpace) {
currCharValid = true;
lastCharacterAddedWasWhiteSpace = true;
} else {
currCharValid = false;
}
} else {
currCharValid = true;
lastCharacterAddedWasWhiteSpace = false;
}
}
if (currCharValid) {
if (charsToSearch[index] != currChar) {
index = 0;
matchLocation.reset();
}
if (charsToSearch[index] == currChar) {
if (index == 0) {
matchLocation.setStartPosition(charCount);
}
if (index + 1 < charsToSearch.length) {
index++;
} else {
matchLocation.setEndPosition(charCount);
matchLocations.add(matchLocation.clone());
index = 0;
if (!findAllMatchLocations) {
break;
}
}
}
}
}
} catch (UnsupportedEncodingException ex) {
OseeExceptions.wrapAndThrow(ex);
} catch (IOException ex) {
OseeExceptions.wrapAndThrow(ex);
} finally {
Lib.close(reader);
}
return matchLocations;
}
}
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