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An artificial intelligence for knowledge acquisition

There is a newer version: 1.4.12

package org.aika.preprocessing;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

import java.util.ArrayList;
import java.util.List;


/**
 *
 * @author Lukas Molzberger
 */
public class PrepareSimpleCharacterProperties {


    public static List extract(char c) {
        List results = new ArrayList<>();
        if(c != ' ') {
            results.add("CHAR." + c);
        }

        if(Character.isLetter(c)) {
            results.add("CI_LETTER." + Character.toLowerCase(c));
//                doc.addAnnotation(i, i + 1, "IS_CHAR", 0);
        }

        if(Character.isDigit(c)) {
            results.add("DIGIT." + c);
        }

        if(",.-&;:!?\"»«".indexOf(c) != -1)  {
            results.add("PUNCT-" + c);
        }

        if(c == ' ') {
            results.add("SPACE");
        }

        return results;
    }
}