/*
* Copyright 2012 Future Systems
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.krakenapps.api;
import java.util.List;
public class AutoCompleteHelper {
public static String extractCommonPrefix(List<String> terms) {
if (terms.size() == 0)
return new String("");
else if (terms.size() == 1)
return terms.get(0);
else {
String commonPrefix = terms.get(0);
for (int i = 1; i < terms.size(); ++i) {
String rhs = terms.get(i);
for (int endPos = commonPrefix.length(); endPos >= 0; --endPos) {
if (endPos == 0) {
return new String("");
}
if (rhs.regionMatches(0, commonPrefix, 0, endPos)) {
commonPrefix = commonPrefix.substring(0, endPos);
break;
}
}
if (commonPrefix.length() == 0)
return commonPrefix;
}
return commonPrefix;
}
}
}