src/main/java/org/yaml/snakeyaml/scanner/Constant.java

/**
 * Copyright (c) 2008-2010 Andrey Somov
 *
 * 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.yaml.snakeyaml.scanner;

public final class Constant {
    private final static String LINEBR_S = "\n\u0085\u2028\u2029";
    private final static String FULL_LINEBR_S = "\r" + LINEBR_S;
    private final static String NULL_OR_LINEBR_S = "\0" + FULL_LINEBR_S;
    private final static String NULL_BL_LINEBR_S = " " + NULL_OR_LINEBR_S;
    private final static String NULL_BL_T_LINEBR_S = "\t" + NULL_BL_LINEBR_S;

    public final static Constant LINEBR = new Constant(LINEBR_S);
    public final static Constant FULL_LINEBR = new Constant(FULL_LINEBR_S);
    public final static Constant NULL_OR_LINEBR = new Constant(NULL_OR_LINEBR_S);
    public final static Constant NULL_BL_LINEBR = new Constant(NULL_BL_LINEBR_S);
    public final static Constant NULL_BL_T_LINEBR = new Constant(NULL_BL_T_LINEBR_S);

    private String content;

    private Constant(String content) {
        this.content = content;
    }

    public boolean has(char ch) {
        return content.indexOf(ch) != -1;
    }

    public boolean hasNo(char ch) {
        return !has(ch);
    }

    public boolean has(char ch, String additional) {
        return additional.indexOf(ch) != -1 || content.indexOf(ch) != -1;
    }

    public boolean hasNo(char ch, String additional) {
        return !has(ch, additional);
    }
}